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Journal Cover Journal of Applied Ichthyology
  [SJR: 0.51]   [H-I: 44]   [6 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0175-8659 - ISSN (Online) 1439-0426
   Published by John Wiley and Sons Homepage  [1589 journals]
  • Length-weight relationships of nine fish species from the upper reach of
           the Gan River, a tributary of the Yangtze River in China
    • Authors: R. Wang; X. Qu, F. Xiong, C. Guo, W. Xin, Y. Chen
      Abstract: Length-weight relationships (LWRs) are reported for nine fish species belonging to four families from the upper reach of the Gan River, one of the main tributaries of the Yangtze River, China. A total of 807 specimens were collected from April 2016 to July 2017. Fishes were both sampled using a backpack electrofishing unit and collected from local fish markets that using various fishing gears such as electrofishing boats, gillnets (mesh sizes: 1–12 cm), hooks, and benthic fyke nets (mesh sizes: 0.5 cm and 0.7 cm). The fish species were Siniperca undulata (Fang & Chong, 1932), Pseudogobio vaillanti (Sauvage, 1878), Sarcocheilichthys parvus (Nichols, 1930), Barbodes semifasciolatus (Günther, 1868), Spinibarbus hollandi (Oshima, 1919), Gobiobotia meridionalis (Chen & Cao, 1977), Pseudobagrus albomarginatus (Rendahl, 1928), Pseudogastromyzon changtingensis (Liang, 1942), and Pseudogastromyzon fangi (Nichols, 1931). The a values for the nine species varied between 0.0056 and 0.0366, the b values ranged from 2.333 to 3.318, and r2 values from .952 to .994.
      PubDate: 2017-12-05T00:25:49.230742-05:
      DOI: 10.1111/jai.13549
       
  • Potential for use of accelerometers to monitor green sturgeon Acipenser
           medirostris (Ayres, 1854) behavior after handling
    • Authors: M. L. Moser; S. C. Corbett, B. J. Burke, O. P. Langness
      Abstract: A pilot study was conducted to test the use of accelerometer tags (coded acoustic transmitters equipped with inertial sensors) to detect changes in green sturgeon activity following gillnet capture and release. Green sturgeon Acipenser medirostris (Ayres, 1854) is listed as threatened under the Endangered Species Act, but is captured as bycatch in both estuarine and coastal gillnet and trawl fisheries. Measured were tailbeat activity and swimming depth of sturgeon (145-167 cm fork length) caught with gillnets in Willapa Bay, Washington during late July 2011. These data were transmitted acoustically over a period of up to 55 d to an array of 16 receivers positioned in the bay. Transmitters were either surgically implanted (n = 2) or attached externally to the dorsal scutes (n = 2). In spite of the small number of fish tagged, over 4,800 data transmissions were obtained, with three fish detected over more than 46 d and in estuaries up to 55 km from the release site. Breakpoint regression analysis indicated that the accelerometers could be used to document discrete changes in activity of the fish after handling. Use of this technology could therefore allow the identification of fishing methods that are most harmful to protected species.
      PubDate: 2017-12-04T01:30:22.629738-05:
      DOI: 10.1111/jai.13571
       
  • Dynamics of Lake Sturgeon (Acipenser fulvescens Rafinesque, 1817) in a
           ‘pristine’ river
    • Authors: T. Haxton; M. Friday, M. Gillespie
      Abstract: Lake Sturgeon, Acipenser fulvescens, was assessed in a large, pristine river in northern Canada using a standardized protocol. Gill netting (38-127 mm and 204-306 mm stretched mesh) was conducted at five sites averaging 37 rkm in the Attawapiskat River in Ontario. The objectives were to ascertain relative abundance of Lake Sturgeon within a northern river; determine if Lake Sturgeon are randomly distributed within a ‘pristine’ river; assess if there is evidence of spatial structuring; and determine if there is genetic structuring within the river. Over the two years (2015 and 2016), 176 Lake Sturgeon were sampled with a mean total length of 851.1 mm (323.4 SD) and mean age of 21 years (12.2 SD). There was a significant difference in the mean total length of the Lake Sturgeon caught, with larger sturgeon in the upstream sites and smaller sturgeon in the downstream sites, signifying a spatial segregation of life stages within the Attawapiskat River. One hundred and fifty-four Lake Sturgeon were genotyped at 10 or more loci. There was no evidence of genetic divergence among sites or population structuring. In fact, parent-offspring relationships were determined using COLONY between upstream and downstream sites, a minimum distance of approximately 190 rkm. This study represents the first to assess a Lake Sturgeon population systematically using a standardized index approach at multiple sites in a ‘pristine’ river. It demonstrated the importance of a holistic approach to the river at a larger scale and a better understanding of life history requirements for conservation. For example, if only one of the upper sites were assessed, it might have been interpreted as the idyllic ‘old growth’ population with limited or no recruitment. The corollary from sampling only lower sites would be identifying a lack of adults and potentially erroneously declaring an overexploitation concern. This stresses the importance of a larger scale approach for assessing ‘pristine’ rivers and not using a small scale approach to make large scale inferences.
      PubDate: 2017-12-01T23:36:42.192719-05:
      DOI: 10.1111/jai.13560
       
  • A practical guide for assigning sex and stage of maturity in sturgeons and
           paddlefish
    • Authors: M. A. H. Webb; J. P. Van Eenennaam, J. A. Crossman, F. A. Chapman
      Abstract: The goal of this paper is to improve the assignment of sex and stage of maturity for sturgeons and paddlefish by providing both an overview of the gonadal stages of maturity and general guidelines and training needs for the four most commonly used techniques to assign sex and stage of maturity including ultrasound, endoscopy, plasma sex steroid analysis, and biopsy of the gonads via celiotomy. Sturgeons and paddlefish do not express external sexual dimorphism, which can make assignment of sex and stage of maturity challenging. Correct assignment of sex and stage of maturity is important for management of wild populations as well as for aquaculture, whether for conservation or commercial production. Selecting a technique to use when assigning sex and stage of maturity will depend on a number of factors; a comparison among these techniques is provided in this review, including tradeoffs, to help assist in technique selection based on specific research or production goals. The use of more than one technique may be beneficial to determine error rates associated with a single technique. This review is intended to serve as a practical resource when assigning sex and stage of maturity in field or laboratory settings in addition to stressing the importance of correctly identifying sex during research and in the management of populations.
      PubDate: 2017-12-01T23:36:33.34662-05:0
      DOI: 10.1111/jai.13582
       
  • A feeding experiment using captive green sturgeon (Acipenser medirostris
           
    • Authors: S. C. Corbett; M. L. Moser, R. B. Johnson, E. L. Parker
      Abstract: Non-invasive methods to determine sturgeon condition are needed for both aquaculture and sturgeon conservation. Such information could help optimize feed choice or holding conditions in aquaculture, and/or allow identification of habitats that are important for sturgeon feeding in the wild. The aim was to determine whether lipid levels (measured by a Distell fish fatmeter) could be used to assess changes in green sturgeon (Acipenser medirostris) condition relative to lethal methods (proximate analysis). Thirty non-reproductive and uniquely marked sturgeon (age 9–11, total length 75.1–114 cm, weight 1.9–7.4 kg) were held at the Conte Anadromous Fish Research Center, Turners Fall, Massachusetts, USA, in Connecticut River water at 14ºC, and under five different rations: 0.1%, 0.25%, 0.5%, 1.0%, and 1.5% body weight/day. Fatmeter readings and conducted proximate composition analysis were taken on muscle tissue of sacrificed animals after 167 days. Five fatmeter measurements were taken at each of three different sites along the dorsal flank above the lateral line. Muscle fat content was determined at the same locations via supercritical fluid extraction (SFE) using carbon dioxide and an ethanol modifier. Fish fed at>0.1% body weight/day gained weight (mean 0.53 ± 0.69–0.74 ± 0.34 kg) and their condition increased by 2%–9% in
      PubDate: 2017-12-01T23:35:58.134495-05:
      DOI: 10.1111/jai.13567
       
  • Estimation of paddlefish (Polyodon spathula Walbaum, 1792) spawning
           habitat availability with consumer-grade sonar
    • Authors: J. D. Schooley; B. C. Neely
      Abstract: The paddlefish (Polyodon spathula Walbaum, 1792) is a springtime migrant that requires discrete abiotic conditions such as water temperature, discharge, and substrate composition for successful spawning and recruitment. Although population declines have prevailed throughout much of the species range, Oklahoma paddlefish are abundant and support popular recreational snag fisheries – most notably in Grand Lake. This stock utilizes the Grand Lake's two primary headwaters, the Neosho and Spring rivers, with only episodic recruitment success. However, relationships between suitable spawning habitat and water level have not been evaluated in this system. Using consumer-grade sonar equipment, this study identified and quantified hard river substrates (such as cobble and bedrock) and investigated proportional habitat availability at a variety of simulated river conditions. Sonar data were used to construct 49-m2 grids of depth and bottom hardness (H) ranging from 0.0 (soft) - 0.5 (hard). Ground-truthing samples of bottom composition were collected with a grab sampler and by visual identification. Substrate types were pooled into two categories: soft substrates (H 
      PubDate: 2017-12-01T23:35:54.697971-05:
      DOI: 10.1111/jai.13565
       
  • Age, growth, and age at sexual maturity of the commercially landed skate
           species, Dipturus chinensis (Basilewsky, 1855), in the northern East China
           Sea
    • Authors: K. Hara; K. Furumitsu, T. Aoshima, H. Kanehara, A. Yamaguchi
      Abstract: Age, growth, and age at sexual maturity of the polkadot skate Dipturus chinensis, in the northern East China Sea were determined for a total of 614 specimens collected from April 2009 to December 2014. Vertebral centrum analysis was used to calculate the age of the skates. Annual band deposition was determined by marginal increment analysis. The von Bertalanffy growth model was fitted to the observed length-at-age data for each sex (males, L∞ = 76.8, k = 0.109, t0 = −1.28; females, L∞ = 83.1, k = 0.103, t0 = −1.20). Growth patterns of females and males were similar until the age of 6; thereafter, females grew larger than males. Maximum age recorded was 13 years for males and 15 years for females. Age at 50% sexual maturity was 8.22 years for males and 9.39 years for females. These results indicate that D. chinensis is slow growing, relatively long-lived, and late maturing, and therefore vulnerable to exploitation.
      PubDate: 2017-12-01T23:35:46.148326-05:
      DOI: 10.1111/jai.13575
       
  • Telemetry and genetic data characterize lake sturgeon (Acipenser
           fulvescens Rafinesque, 1817) breeding ecology and spawning site fidelity
           in Green Bay Rivers of Lake Michigan
    • Authors: M. C. Donofrio; K. T. Scribner, E. A. Baker, J. Kanefsky, I. Tsehaye, R. F. Elliott
      Abstract: The primary objective of this study was to use direct (acoustic telemetry) and indirect (genetic assignment) methods to characterize basic aspects of lake sturgeon (Acipenser fulvescens Rafinesque, 1817) breeding ecology. Specifically, data on natal origin, spawning habitat, spawn sex-size structure, and sex-specific residence times, spawning site fidelity, seasonal movements and degree of straying between demographically and genetically independent populations. A secondary benefit of the project was the non-spawning period movements of tagged fish. The analysis was based on acoustic telemetry and genetic assignment tests for individuals captured from the Menominee, Peshtigo, Oconto and Fox rivers (draining into Green Bay) in Wisconsin, which represent the only spawning rivers in western Lake Michigan. Sturgeon (N = 160) were captured during the spring (18 April-25 May) of 2011-2015 using large dip nets (51%) and electro fishing (49%). Captured sturgeon were genotyped and assigned to a Great Lakes river population using likelihood-based estimators based on microsatellite (N = 13) genotype and mtDNA haplotype frequencies. Assignments revealed that captured adults from four Green Bay rivers were of an aggregate composition from the overall sample size (N = 160) of 38.2% assigned to the Fox-Wolf River population, 23.5% to the Menominee River population and 37.4% to the Peshtigo-Oconto River population. One adult female sturgeon was assigned to the Manistee River population (eastern Lake Michigan). Of the 160 captured adults, 115 spawning lake sturgeon were tagged with surgically inserted acoustic tags/transmitters (Vemco V-16). Collected lake sturgeon ranged in size from 114 cm to 185 cm total length, and girth from 43 cm to 74 cm. Visual examination during surgery confirmed the sex of each individually tagged fish. Timing of post-surgery departure from the rivers differed significantly between males (mean 35.6 days) and females (mean 8.9 days), but was not significant because of the large variability. Post-surgery residence time was longer for the Menominee River sturgeon compared to individuals from the other rivers. More than twice as many males versus females were detected in the four rivers during the non-spawning period. A subsample of 53 lake sturgeon returned to one of the four rivers 1.9-3.4 years after surgery. Eight males returned to one of the four rivers in successive springs but no female sturgeon returned in successive years. High straying (i.e., dispersal to a non-native stream to spawn) rates occurred among rivers. Transition probability was highest for lake sturgeon captured in the Peshtigo and Oconto Rivers moving to the Fox River (0.77), and Fox River captured lake sturgeon moving to the Peshtigo and Oconto rivers (0.21). Since these populations represent the only spawning sturgeon in western Lake Michigan, lake sturgeons associated with these rivers represent spawning populations of significant importance towards their restoration in Lake Michigan. This study improved the understanding of the species breeding ecology and movement patterns needed to guide management decisions, such as prioritizing habitats for restoration or protection.
      PubDate: 2017-12-01T23:35:33.318373-05:
      DOI: 10.1111/jai.13561
       
  • Comparison of growth performance, biochemical and fatty acid compositions
           between all-female diploid and triploid rainbow trout Oncorhynchus mykiss
           (Walbaum, 1792)
    • Authors: İ. Karayucel; A. Parlak Akyüz, S. Dernekbaşı
      Abstract: This study compares the performance (in terms of survival and growth), biochemical and fatty acid compositions among all female diploid (AFD) and triploid (AFT) rainbow trout (Oncorhynchus mykiss). AFD and AFT fish with mean initial weights of 1,040.1 ± 1.3 and 1,039.7 ± 1.6 g, respectively, were reared and fed from March to August with a commercially extruded trout feed in a commercial freshwater fishfarm located in the Black Sea region (Samsun, Turkey). Survival was reduced throughout the experimental period in the AFT group with increasing water temperatures. At the end of the experiment, survival rates were 98.57 ± 1.43% and 82.38 ± 7.39% for the AFD and AFT groups, respectively. The AFD group showed significantly better growth performances in terms of weight gain, feed conversion rate (FCR), relative growth rate (RGR) and specific growth rate (SGR) than the AFT group (p 
      PubDate: 2017-12-01T23:35:27.039775-05:
      DOI: 10.1111/jai.13579
       
  • Length-weight relationship of ten indigenous freshwater fish species from
           Gandak River, Bihar, India
    • Authors: Raju Baitha; Archana Sinha, Satish Kumar Koushlesh, Thangjam Nirupada Chanu, Kavita Kumari, Pranab Gogoi, Mitesh Haridas Ramteke, Simanku Borah, Basanta Kumar Das
      Abstract: Ten indigenous freshwater fish species belonging to nine genera and seven families were collected from Gandak River, Bihar, India during December, 2014 to September, 2016. Fishes were caught using Cast nets, Gill nets, Drag nets with mesh size of 15–20 mm, 25–30 mm and 5–10 mm respectively along with Traps. Sampling was done during dry and wet seasons and a total of 682 fish were collected for analysis of their Length–Weight Relationships (LWRs). Analyses included seven species for which no previous LWRs information were available in FishBase, and new maximum lengths were recorded for three species.
      PubDate: 2017-12-01T23:35:24.521686-05:
      DOI: 10.1111/jai.13555
       
  • Lethal and non-lethal effects of predation by native fish and an invasive
           crayfish on hatchery-reared age-0 lake sturgeon (Acipenser fulvescens
           Rafinesque, 1817)
    • Authors: J. A. Crossman; K. T. Scribner, P. S. Forsythe, E. A. Baker
      Abstract: The objective was to investigate the effects of two native fish predators (adult rock bass Ambloplites rupestris, and smallmouth bass Micropterus dolomieue) and an invasive benthic crayfish (Orconectes rusticus) on habitat choice and survival of hatchery-reared age-0 lake sturgeon (Acipenser fulvescens). Three length-classes (mean total length ± 1 SD) of 68.4 ± 12.7 cm, 85.9 ± 15.0, and 111.6 ± 15.4 cm corresponding to 8–9, 11–13, and 15–16 weeks of age, respectively, were examined. Experiments were conducted in a circular (2.44 m diameter, 0.6 m deep) fiberglass tank divided into two equal sections (volume of each section: 2.81 m3). Each section included three contiguous and equal sized substrate types [sand, small gravel (4–10 mm diameter), and cobbles (30–50 mm diameter)] along with the water column providing a choice of habitats. Survival and substrate choice were quantified with and without predators over 24 hr with 30 sturgeon per trial. Multiple trials were repeated for each length-class and predator type. Survival was also evaluated when alternate prey (emerald shiners Notropis atherinoides) were present in equal numbers (n = 15 per trial). Sturgeon used sand in the absence of a predator or in the presence of fish predators, but in the presence of crayfish the water column (58 ± 5%) was used in increasingly higher proportions by the end of the trial. Survival was significantly lower for sturgeon exposed to crayfish (54%) compared to all other fish predators (97%). Fish predators consumed significantly more alternate prey (32%) than sturgeon (0%) while crayfish consumed significantly more sturgeon (35%) compared to alternate prey (0%). Results demonstrate that non-lethal effects may contribute to higher rates of mortality between alternate predator types through predator-induced occupancy of non-preferred habitats.
      PubDate: 2017-12-01T06:01:31.128905-05:
      DOI: 10.1111/jai.13558
       
  • Site fidelity of intertidal fish to rockpools
    • Authors: J. Roma; M. Dias, C. Vinagre, A. C. F. Silva
      Abstract: Gobius paganellus, Lipophrys pholis and Coryphoblennius galerita are wide-spread intertidal fish that spend their earlier life stages in rock pools, and yet very little is known about their site fidelity behaviour. For these species, fidelity to rockpools may result in increased fitness costs in a predicted scenario of warmer sea water, due to the low thermal inertia of these water bodies. In this context, it is relevant to investigate these species' site fidelity. We made a mark-recapture study to assess the mentioned species' movements within and between rockpools. We tagged a total of 530 individuals of the aforementioned species with the Visible Implant Elastomer and tracked their movement for a 7-month period. We found that site fidelity and specific rockpools conditions are important factors in distribution of intertidal blennies and gobies. We also examined the relations between rockpool volume, depth and site fidelity. We found that G. paganellus tends to remain in its original marking pool, with an average recapture rate of 20.5%, but showed no evidence of inter-pool movement. Rockpool depth, however, proved to be important in the blennies' movements. Our findings are among the first to prove that a mark-recapture method can be successfully used to track intertidal fish movements. In particular, we showed that G. paganellus presents site fidelity in intertidal rockpools during its early ontogeny for a period of two to three months.
      PubDate: 2017-12-01T06:01:19.826058-05:
      DOI: 10.1111/jai.13553
       
  • Ecological conditions affect behavioral and morphological trait
           variability of lake sturgeon (Acipenser fulvescens Rafinesque, 1817)
           yolk-sac larvae
    • Authors: K. J. Jay; J. M. McGuire, K.T. Scribner
      Abstract: The effects of stream environmental conditions on inter individual variability were quantified for lake sturgeon, Acipenser fulvescens (Rafinesque, 1817) yolk sac larvae in the expression of behavioral and morphological traits. Simulated experimental treatments including food availability (brine shrimp), presence of chemosensory predator cues (adult crayfish and odonate larvae), and conspecific density (2 verses 1 larvae) were applied to determine the effects on the duration of time in substrates following hatch and growth from hatch until emergence. In spring 2010, larvae from two full-sib families were individually placed into 240 mL perforated plastic containers (n = 263) with gravel substrate immediately following hatch. Containers were maintained in stream water at ambient temperatures and constant flow (~0.03 m/sec) in 4 m experimental flowing streams. Duration of time (days) each individual remained in the substrate was recorded. Morphological traits including total length (mm), body area (mm2), and yolk-sac area (mm2) were measured at hatch and at the time of emergence from substrate to compare growth and amount of endogenous yolk reserves used in individuals among experimental treatments. Environmental conditions significantly affected emergence time. Individuals emerged earlier in treatments exposing larvae to chemosensory predator odorants and higher conspecific density. Use of endogenous reserves (yolk-sac area) at the time of emergence did not differ among treatments. Growth was significantly greater when individuals were provided a food source compared to all other treatments. Quantifying the magnitude and direction of phenotypic responses to environmental conditions is important to understand potential factors affecting survival during early life stages and population viability under conditions of increasing environmental variability.
      PubDate: 2017-12-01T06:01:12.028926-05:
      DOI: 10.1111/jai.13572
       
  • Characterization of 27 novel microsatellite loci in Sinibotia
           superciliaris (Günther 1892) and cross-species transferability in
           Sinibotia reevesae (Chang 1944)
    • Authors: Y. Wang; S. Liu, Z. Peng, B. Xie
      Abstract: The Chinese golden loach, Sinibotia superciliaris and its congener Sinibotia reevesae, are endemic to China and extraordinary similar in morphological traits. However, few genetic studies have been conducted on them, especially those based on nuclear markers. Here, we developed 27 novel polymorphic microsatellite markers from S. superciliaris and further tested the cross-species transferability of those loci in S. reevesae. The cross-species amplification test showed that 19 loci demonstrate polymorphism in S. reevesae. The mean number of alleles (NA) were both 3 in S. superciliaris and S. reevesae, the mean expected heterozygosities (HE) were 0.57 and 0.54, the Shannon-Wiener Diversity Indices (SW) were 0.84 and 0.82, and the evenness (E) were 0.09 and 0.08, respectively. The polymorphic information content (PIC) showed a high level of polymorphism for the two species (mean 0.54 and 0.50, respectively). In addition, the cross-species transferability (100%) of those markers was clearly high, which confirmed that the microsatellite markers developed here could be used effectively for other related species.
      PubDate: 2017-12-01T06:01:07.199121-05:
      DOI: 10.1111/jai.13539
       
  • Length-weight relationships of six fishes from the Anning River, China
    • Authors: H. J. Ru; Y. Zhang, Y. F. Li, X. X. Wu, Z. H. Ni
      Abstract: This paper provides the length–weight relationships for six fish species collected from the Anning River, one of the biggest tributaries of the Yalong River in China. A total of 1096 specimens belonging to six fish species were analyzed. Among them, the length–weight relationships for 4 fish species are first-time reports for FishBase and new maximum lengths of one fish species is also reported.
      PubDate: 2017-12-01T06:01:05.172522-05:
      DOI: 10.1111/jai.13437
       
  • Translocation as a mitigation tool: Demographic and genetic analysis of a
           reintroduced lake sturgeon (Acipenser fulvescens Rafinesque, 1817)
           population
    • Authors: M. Boothroyd; T. Whillans, C. C. Wilson
      Abstract: This study assessed the establishment success of a translocation of adult lake sturgeon (Acipenser fulvescens) upstream of a hydroelectric dam in northern Ontario, Canada, using demographic and genetic data from juveniles and adults. The objectives of this study were to (i) assess the size and demographic structure of the reintroduced population; (ii) determine if juveniles are present; (iii) assess the genetic diversity of the reintroduced and source populations; and (iv) determine whether translocated adults are related to juveniles within the population. Gillnet and trotline sampling in multiple years (2002–2003; 2011–2016) resulted in the capture of many juveniles (n = 126) and some adults (n = 13) at the release site and downstream. The first fin ray of the left pectoral fin was collected for ageing and genetic analysis, and individuals were genotyped at 15 microsatellite loci. Age interpretations from the juvenile samples showed consistent cohorts starting in 2007 (2006–2012). Successful reproduction and recruitment by translocated adults was confirmed through genetic parentage analysis of microsatellite data, which linked juveniles to parents that had retained tags from the original translocation. Based on the microsatellite data, the genetic diversity of the reintroduced population (HO) was comparable to its source (HO = 0.57 ± 0.07 and 0.53 ± 0.06, respectively), although its estimated effective population size (Ne) was lower (Mattagami = 20.4 [13.5–30.5]; Adam's Creek = ∞ [72.0–∞]). These results suggest that the experimental translocation of wild adult lake sturgeon was successful, and highlight the value of treating translocation efforts as experimental reintroductions.
      PubDate: 2017-12-01T06:01:03.348939-05:
      DOI: 10.1111/jai.13573
       
  • Filling the gap: Length–weight and length–length relationships of
           intertidal endemic fishes of the Brazilian Province Oceanic Islands
    • Authors: R. Andrades; J.-C. Joyeux, J. M. Andrade, F. S. Machado, J. A. Reis-Filho, R. M. Macieira, T. Giarrizzo
      Abstract: Length-weight and length-length relationships were determined for nine fish species of Rocas Atoll, Fernando de Noronha and Trindade Island. Samples were conducted in 2014 (Rocas) and 2015 (Noronha and Trindade) in tidepools using anaesthetic clove oil and hand nets to collect fish fauna. Four species (Stegastes rocasensis, Scartella itajobi, Starksia multilepis and Bathygobius brasiliensis) are endemic from the Noronha-Rocas ridge, two are endemic from the Trindade-Martin Vaz insular complex (Scartella poiti and Malacoctenus brunoi), and three species have a widespread distribution. All relationships are novel for science.
      PubDate: 2017-12-01T06:00:38.178784-05:
      DOI: 10.1111/jai.13554
       
  • Length-weight relationships of four fish species from the estuary of the
           Pearl River, South China
    • Authors: F. Y. Wang; Q. Wang, L. Cai
      Abstract: Length-weight relationships were determined for four fish species [Pterois russelii Bennett, 1831, Trichiurus margarites Li, 1992, Muraenesox cinereus (Forsskål, 1775), and Pterygotrigla ryukyuensis Matsubara & Hiyama, 1932]. Samples were collected from the estuary of the Pearl River with commercial trawls (mesh size 2 cm) periodically each season from May 2012 to January 2014. Prior to this study, the length-weight relationships for these four species were unknown.
      PubDate: 2017-12-01T06:00:27.350633-05:
      DOI: 10.1111/jai.13574
       
  • Length‐weight and length‐length relationships of two gobiid fishes
           Eleotris fusca (Forster, 1801) and Odontamblyopus rubicundus (Hamilton,
           1822) from the Payra River, southern Bangladesh
    • Authors: F. Ahamed; N. Saha, S. Jahan, S. Akter, M. Y. Hossain, Z. F. Ahmed, J. Ohtomi
      Abstract: The present study provides the estimates of length‐weight relationships (LWRs) and length‐length relationships (LLRs) of two gobiid fishes Eleotris fusca and Odontamblyopus rubicundus from the Payra River, southern Bangladesh. Fish samples were collected from the set bagnet (mesh size
      PubDate: 2017-11-28T02:26:23.745788-05:
      DOI: 10.1111/jai.13547
       
  • Effects of temperature and hydrology on growth of shovelnose sturgeon
           Scaphirhynchus platorynchus (Rafinesque, 1820) in the lower Mississippi
           River
    • Authors: J. M. Porter; H. L. Schramm
      Abstract: We evaluated the effects of thermal and hydrologic conditions on the growth of shovelnose sturgeon (Scaphirhynchus platorynchus) in the lower Mississippi River, USA. Duration of water temperatures 12–24°C had a positive influence and temperatures below 11°C had a negative influence on annual growth increment, but these two variables accounted for less than 15% of the variation in growth. Duration of water temperatures above 28°C, duration of floodplain inundation, duration of low water, and minimum and maximum river stage did not influence annual growth increment. Growth of shovelnose sturgeon in the lower Mississippi River appears to be positively influenced by duration of moderate water temperatures but minimally influenced by hydrologic conditions. The low variation accounted for by thermal and hydrologic variables suggests annual growth increment may be largely influenced by additional abiotic or biotic factors.
      PubDate: 2017-11-28T02:26:14.657688-05:
      DOI: 10.1111/jai.13548
       
  • Length‐weight relationship of fish species from the Bijagós
           Archipelago, Guinea‐Bissau
    • Authors: E. Correia; J. P. Granadeiro, A. Regalla, P. Catry
      Abstract: Length–weight relationships were estimated for six teleost fish species occurring in Bijagós Archipelago, Guinea‐Bissau. Samples were collected seasonally during three dry seasons (2013/2014, 2014/2015, 2015/2016) and two rainy seasons (2015 and 2016). Fishes were captured by three methods: angled from the beach or a boat; using beach seine with a mesh size ranging 0.5–1 cm; drift netting from a boat (mesh size 2 cm). This work provides the length‐weight relationship for three fish species that are not reported in FishBase (Citharichthys stampflii, Gerres nigri and Psettodes belcheri) as well as for three species from which we present a wider size range (Eucinostomus melanopterus, Scomberomorus tritor and Sphyraena afra).
      PubDate: 2017-11-27T00:50:20.516603-05:
      DOI: 10.1111/jai.13522
       
  • Characterization of food web structure of the upper continental slope of
           
    • Authors: D. Kopp; M. Robert, L. Pawlowski
      Abstract: In marine ecosystems, the study of trophic relationships has extensively benefited from the development of stable isotope analyses (SIA) as dietary tracers. SIA are particularly useful in elucidating the structure of deep sea food webs given the constraints involved in obtaining gut‐content data from deep trawling. We used carbon and nitrogen stable isotope analyses and Stable Isotope Bayesian Ellipses in R (SIBER) and Stable Isotope Analysis in R (SIAR) routines, to determine the trophic ecology of five deep‐sea fishes from the upper continental slope of the Celtic Sea. SIA made it possible to deduce some general tendencies in food‐web structure and species trophic interactions and confirmed diet determined by gut‐content analysis for the same species, in other ecoregions. More specifically, mixing models revealed that the deep sea species considered are omnivorous and are able to feed on all the sampled taxa. Based on isotopic ratio, no clear differences in fish diet could be detected from one species to another except for rabbit fish, which has benthic affinities. Three species, blackbelly rosefish, greater forkbeard and softhead grenadier showed overlapping isotopic niches. This study is the first attempt to describe the trophic ecology of deep sea species on the Celtic Sea upper continental slope. In the context of the development of ecosystem integrated modeling approaches for managing fisheries in the Celtic sea, and considering the vulnerability of deep‐water species, improving the knowledge on the trophic ecology of these local species is of importance in order to allow their sustainable exploitation.
      PubDate: 2017-11-16T00:06:16.674834-05:
      DOI: 10.1111/jai.13544
       
  • Length–weight and Length‐length relations of four fish species from
           the Chilika Lake, East coast of India
    • Authors: S. K. Karna; V. R. Suresh, M. Mukherjee, R. K. Manna
      Abstract: This study reports the length–weight relationship (LWR) and length‐length relationship (LLR) estimated for four fish species inhabiting in Chilika Lake, India. Total 504 specimens were sampled from mono‐filament gill nets (mesh size 12 mm, 22–24 mm, 34–38 mm, 42 mm) during January 2015 to December 2015. The estimated b values from LWR ranged between 2.79 (T. biaculeatus) to 3.29 (C. praeustus). In all species, the relationships between length‐weight and length‐length were highly correlated (p 
      PubDate: 2017-11-16T00:06:10.83583-05:0
      DOI: 10.1111/jai.13545
       
  • Age and growth of the Giant Kelpfish, Heterostichus rostratus Girard 1854,
           in Southern California, USA
    • Authors: M. S. Winston; J. T. Claisse, C. M. Williams, J. P. Williams, D. J. Pondella
      Abstract: In order to update existing life history parameters, age and growth patterns were determined for Giant Kelpfish, Heterostichus rostratus sampled from nearshore kelp forest and estuary habitats in southern California (USA) from April 2012 through June 2015. Fish were collected by pole spear, beach seine, beam trawl, purse seine, and square enclosure. Using age‐at‐length data derived from otolith readings, Giant Kelpfish were found to have a relatively short life span with the largest examined fish reaching a maximum total length of 413 mm at an age of 5 years. Von Bertalanffy growth parameters estimated for this species were: L∞ = 45.1 cm, k = 0.25, t0 = −0.66. Standard length (SL, cm)‐total length (TL, cm) and total length (TL, cm)‐weight (W, g) relationships were described by the equations: SL = 0.90 TL – 1 and W = 2.21 × 10−3 TL3.39, respectively. Wild juvenile Giant Kelpfish collected for this study had a higher growth rate than laboratory‐reared fish from a previous study.
      PubDate: 2017-11-16T00:06:09.256016-05:
      DOI: 10.1111/jai.13541
       
  • Reproductive biology of the invasive species Pseudoxiphophorus bimaculatus
           and Poecilia sphenops in the Teuchitlán River, México
    • Authors: A. Ramírez-García; J. P. Ramírez-Herrejón, M. Medina-Nava, R. Hernández-Morales, O. Domínguez-Domínguez
      Abstract: Reproductive biology of invasive species is not often studied relative to the invasion process, although it may provide an accurate indicator of the invasion stage. We evaluated the reproductive biology of the exotic fish species Pseudoxiphophorus bimaculatus and Poecilia sphenops in the Teuchitlán River, Jalisco, Mexico by fertility, size at first maturity, sex ratio, gonad maturity stage, gonadosomatic index, condition factor, size‐structure, and habitat. The reproductive variables were related to environmental characteristics using the non‐metric analysis of multidimensional scaling. A total of 1374 specimens of P. bimaculatus and 571 of P. sphenops were captured by seine netting and electrofishing. Maximum fertility of P. bimaculatus was 15.99 ± 2.27 embryonated eggs and embryos and, for P. sphenops, 31.26 ± 4.17. Females predominated among P. bimaculatus, while in P. sphenops the sex ratio was ~1:1. We found mature female and male of P. bimaculatus in degraded sites and juveniles in the springs. Poecilia sphenops reproduced along the river. The establishment of both invasive species in the Teuchitlán River is evidence that they share the reproductive habitat with native fish species, and tend to spread and colonize new areas.
      PubDate: 2017-11-16T00:05:58.666967-05:
      DOI: 10.1111/jai.13543
       
  • Length–weight relationships of three demersal fish species caught from
           the eastern region of Java Sea, Indonesia
    • Authors: M. Saleh; T. W. C. Putranto, A. Arisandi, A. Soegianto
      Abstract: Length–weight relationship (LWR) parameters were determined for three demersal fish species Nuchequula gerreoides, Scarus scaber and Therapon theraps. The fishes were collected by seine net (the mesh size of wing: 12.70 cm, body: 3.81 cm, cod end: 2.54 cm, and total length of net: 20 m) in eastern region of Java Sea Indonesia during October 2016 – March 2017. The total length of these species (14.3 cm for N. gerreoides, 24.5 cm for S. scaber and 21.5 cm for T. theraps) were longer than previous studies. The b values of the LWR were 2.967 for N. gerreoides, 3.046 for S. scaber and 3.0475 for T. theraps.
      PubDate: 2017-11-10T05:40:26.140667-05:
      DOI: 10.1111/jai.13538
       
  • Length‐weight relationships for five fishes in the Pengxi River, a main
           tributary of the Three Gorges Reservoir, China
    • Authors: Y. F. Que; Z. Yang, H. Y. Tang, W. T. Li, N. Xu, D. M. Xu, F. Shi
      Abstract: The length‐weight relationships and new total length are described for five fish species in the Pengxi River basin of the Three Gorges Reservoir. Fish were occasionally sampled from five sites between 2009 and 2014, using various gill nets (mesh size range 2–12 cm) and electrofishing. For four of the five species studied a new maximum total length not yet recorded in previous length‐weight estimates have been found. These data will help to convert length data from field studies in the Three Gorges Reservoir into weight and biomass.
      PubDate: 2017-11-10T05:40:24.806827-05:
      DOI: 10.1111/jai.13537
       
  • Length–weight relationships of nine rarely occurring carangids in the
           northern Arabian Sea coast of Pakistan
    • Authors: N. Qamar; S. K. Panhwar
      Abstract: In this paper, we document length–weight relationships (LWRs) for nine rarely occurring carangids, opportunistically sampled form commercial catches between 2012 and 2015 being fished from the northern Arabian Sea coast of Pakistan. After confirmation in the FishBase database all nine species Alectis indica (25), Alepes melanoptera (20), Alepes vari (22), Atropus Atropos (25), Carangoides praeustus (50), Seriolina nigrofasciata (21), Trachinotus blochi (30), Trachinotus mokalee (34) and Uraspis uraspis (17) found no LWRs previously documented. The slope values for species presented range from 2.44 to 2.93, intercepts 0.0001–0.048, coefficient of determination 0.89–0.99, and confidence intervals for slopes and intercepts of each species calculated. The LWRs data of nine species would be added in the FishBase database, and provide underlying biological data to the regional biologist for further exploration of these species.
      PubDate: 2017-11-09T07:05:32.244402-05:
      DOI: 10.1111/jai.13540
       
  • Length–weight relationships of four fish species from the upper Paraná
           River basin, Southeastern Brazil
    • Authors: V. M. Azevedo-Santos; P. N. Coelho, E. M. Brambilla, F. P. Lima, A. B. Nobile, J. R. Britton
      Abstract: Here the length–weight relationships (LWR, hereafter) of Pareiorhina pelicicei, Trichomycterus candidus, T. pirabitira, and T. piratymbara are provided. Samples of each species were collected between April and July 2017 with a hand net (1.5 mm mesh) in three sites from the upper Paraná River basin, Southeastern Brazil. These results increase knowledge about the LWR of Neotropical freshwater fish.
      PubDate: 2017-11-09T07:05:30.560076-05:
      DOI: 10.1111/jai.13542
       
  • Length‐weight relationships of three fish species from the costal of
           Hainan, the South China Sea
    • Authors: Q. T. Zeng; J. Y. Li, H. T. Liu, Y. X. Cheng
      Abstract: Length‐weight relationships were determined for three fish species [Bregmaceros rarisquamosus Munro, 1950; Sardinella albella (Valenciennes, 1847) and Cynoglossus macrolepidotus (Bleeker, 1851)] inhabiting the coastal of Hainan, China. Fishes were collected using gillnets (mesh size 0.5 cm) and electrofishing from 2005 to December 2012. The b‐values of the equations ranged between 2.57 for Bregmaceros rarisquamosus and 3.34 for Cynoglossus macrolepidotus and thus were just inside the acceptable range for this value. Further, for B. rarisquamosus a new TLmax was recorded.
      PubDate: 2017-11-08T02:30:22.133017-05:
      DOI: 10.1111/jai.13535
       
  • Length‐weight and length‐length relationships of four small fishes
           from the Atrai River, Dinajpur, Bangladesh
    • Authors: M. R. Islam; S. Roy, M. J. Mia, A. K. M. Rohul Amin
      Abstract: Length‐weight (LWRs) and length‐length relationships (LLRs) were determined for four fish species collected from the Atari River in Dinajpur of Bangladesh. Sampling took place monthly between January and June 2016, using seine nets of commercial fishermen (mesh size 4 mm). In LWRs (r2 > .927, p  .812, p 
      PubDate: 2017-11-06T02:54:57.73165-05:0
      DOI: 10.1111/jai.13531
       
  • Use of non‐island, shallow nearshore beach environments by Gulf Sturgeon
           (Acipenser oxyrinchus desotoi) within the Mississippi Sound, USA
    • Authors: M. S. Peterson; W. T. Slack, P. O. Grammer, J.-M. Havrylkoff
      Abstract: Large sub‐adult/adult western population Gulf Sturgeon move to barrier islands in winter to feed whereas eastern fish move offshore or to nearshore non‐island environments; most small sub‐adults/juveniles remain in the estuarine system during winter. To test this, we used an acoustic data set deployed around the Port of Gulfport (hereafter Port footprint, east gate, west gate) within Mississippi Sound. We documented between three and six fish on each receiver totaling 12,285 detections for all 19 receivers between September 2012–May 2013. Only 30% of fish had both a high number of overall detections and a high number of detection days. In contrast, from October 2013–May 2014, between three and nine fish were detected on each receiver but with only 2,371 detections. Five fish (29.4%) had a high number of detections but a reduced number of detection days in the acoustic array; all fish appeared to be transients. Adults, unexpectedly, had the most prevalent occurrence and number of detection days in these shallow, non‐island beach environments contrary to our initial hypothesis. Our data suggests annually variable, regional‐scale use of beach environments not associated with barrier islands that likely serve as a travel corridor between drainages/offshore barrier islands, or as feeding zones; these movements may enhance the potential for mortality in Mississippi Sound.
      PubDate: 2017-11-06T02:54:44.838728-05:
      DOI: 10.1111/jai.13532
       
  • Length‐weight relationships of ten tropical finfish species from north
           eastern Arabian Sea, India
    • Authors: G. B. Purushottama; K. V. Akhilesh, B. B. Chavan, B. N. Katkar, Thakurdas, V. V. Singh
      Abstract: The length weight relationships (LWRs) of ten tropical finfish species from north eastern Arabian Sea, India were studied. Specimens were caught using a wide range of fishing gear mainly trawl nets (20–25 mm), dol nets or bag nets (20–40 mm) and gill nets (80–270 mm) operated in Maharashtra maritime waters during 2012–2016. The specimens were measured for total length, and weight, then dissected and the sex confirmed. Previously unavailable in FishBase, the detailed LWR of Polydactylus mullani is reported for the first time. Maximum total lengths presented for six species in this study are new records. The existence of a differential growth between male and female was confirmed for five species, which was not known earlier. The LWR data will be useful for deriving future sustainable management and conservation strategies.
      PubDate: 2017-11-06T02:54:39.763101-05:
      DOI: 10.1111/jai.13530
       
  • Length‐weight relationships of five needlefish species from Kerala
           waters, south‐west coast of India
    • Authors: S. K. Roul; T. B. Retheesh, U. Ganga, E. M. Abdussamad, P. Rohit, A. K. Jaiswar
      Abstract: Length‐weight relationships (LWRs) were estimated for five needlefish species such as Ablennes hians (Valenciennes, 1846), Tylosurus crocodilus (Péron & Lesueur, 1821), Tylosurus acus melanotus (Bleeker, 1850), Strongylura leiura (Bleeker, 1850), and Strongylura strongylura (van Hasselt, 1823). Specimens were collected on weekly basis from Cochin Fisheries Harbour (Lat. 09056′327″N, Long. 76015′764″E), Munambam Fisheries Harbour (Lat. 10010′965″N, Long. 76010′258″E), Kalamukku (Lat. 09059′924″N, Long. 76014′564″E) and Chellanam (Lat. 09047′950″N, Long. 76016′551″E), between October 2015 to August 2017. Fish were captured by traditional long liner (hook no. IX‐XIV) and ring seiner (mesh size 8–24 mm). The estimated allometric co‐efficient b values ranged from 3.063 (Tylosurus acus melanotus) to 3.962 (Strongylura leiura) and r2 values ranged from 0.850 (Tylosurus acus melanotus) to 0.992 (Tylosurus crocodilus). All the LWRs were highly significant, with p 
      PubDate: 2017-11-02T06:56:07.831971-05:
      DOI: 10.1111/jai.13527
       
  • Seasonal growth differences of larval Hyporhamphus picarti (Hemiramphidae)
           in the Sine Saloum estuary, Senegal
    • Authors: J. Döring; S. I. Neumann, H. Sloterdijk, W. Ekau
      Abstract: The African halfbeak Hyporhamphus picarti (Hemiramphidae) is one of the most abundant species within the ichthyoplankton community of the Sine Saloum estuary (Senegal). A year‐round occurrence of larvae suggests that the Sine Saloum is an important spawning habitat for this species. Annual fluctuations in water temperature, however, can have severe impacts on the survival probabilities of marine fish larvae. To determine whether temperature has an effect on the growth of H. picarti during its larval development, larval age at length and somatic growth rates were investigated for two contrasting spawning seasons in 2014: February (cold season, 20.8°C) and June (warm season, 26.4°C). In both months H. picarti larvae were sampled at the mouth of the Saloum River using neuston nets. Sagittal otoliths’ increments were counted to estimate the larva age at a given standard length (SL). The age of larvae ranged between 2 and 22 days, with SL of 3.86–21.68 mm, respectively. In order to describe larval age at length during the contrasting spawning seasons, two distinctive Gompertz functions were applied. Accordingly, specimens sampled in June (0.94 ± 0.17 mm per day) exhibited significantly higher somatic growth rates than those sampled in February (0.60 ± 0.06 mm per day). These findings suggest that water temperature is an important factor influencing larval growth in H. picarti. Information concerning the early life stages of H. picarti are scarce and the results of the present study may contribute to a better understanding of the species’ biology and ecology.
      PubDate: 2017-11-02T06:55:53.275677-05:
      DOI: 10.1111/jai.13528
       
  • Length‐weight relationships (LWRs) of four freshwater fish species from
           the Brahmaputra and Barak river basins, northeast India
    • Authors: S. Basumatary; H. Choudhury, B. Talukdar, D. Sarma
      Abstract: The present study describes the length‐weight relationships (LWRs) were determined for four fish species, collected from the Brahmaputra and Barak river basins in northeast India using cast nets (2.5 × 1 m; 10–15 mm mesh size) and gillnets (30 × 0.9 m; 5–10 mm mesh size), from June 2016 to July 2017. The b values in LWRs were determined as 2.70 for Badis tuivaiei Vishwanath & Shanta, 2004, 2.93 for Canthophrys gongota (Hamilton, 1822), 2.62 for Glyptothorax botius (Hamilton, 1822), and 3.22 for Gogangra viridescens (Hamilton, 1822).
      PubDate: 2017-11-02T06:55:33.500998-05:
      DOI: 10.1111/jai.13536
       
  • Length–weight relationships of six fish species from the headstream
           region of the Dongjiang River, China
    • Authors: F. Lin; Q. H. Zhou, D. H. Yang, Z. L. Lu, J. Zhang
      Abstract: Dongjiang River, a main tributary of the Pearl River, is geographically situated in South China. The present study describes the length–weight relationships (LWRs) of six fish species (Acrossocheilus paradoxus, Barbodes semifasciolatus, Onychostoma elongatum, Microphysogobio fukiensis, Microphysogobio kiatingensis, Metzia lineata) from the headstream region of the river including five Chinese endemic species (A. paradoxus, B. semifasciolatu, O. elongatum, Mi. fukiensis, Mi. kiatingensis). Fish species of five genera of the same family were collected quarterly from April 2012 to October 2014 by using non‐selective fishing gears: drag nets (5 m, mesh‐size 3 cm), drift gillnets (30 × 15 m, mesh‐size 5 mm), fish cages (4 m, mouth opening 40 × 40 cm), scoop nets (mesh‐size 0.5‐1 cm), and electro‐fishing (12V, 200 Hz). The parameter a and b in the LWR equations (W = a Lb) ranged from 0.0014 to 0.0228, and 2.89 to 3.18, respectively. Compared with FishBase, this study provides the first LWR records for four cyprinids (A. paradoxus, B. semifasciolatu, O. elongatum, Me. lineata) and a new record of maximum body length for O. elongatum.
      PubDate: 2017-11-02T06:55:31.372285-05:
      DOI: 10.1111/jai.13534
       
  • Length‐weight relationships of four fish species from mangrove of
           Zhanjiang, China
    • Authors: W. Xiong; G. P. Zhu, Z. L. Wang, N. Ye
      Abstract: Length‐weight relationships were determined for four fish species [Acentrogobius viridipunctatus (Valenciennes, 1837); Acentrogobius caninus (Valenciennes, 1837); Glossogobius olivaceus (Temminck & Schlegel, 1845); and Lutjanus ophuysenii (Bleeker, 1860)] belonging to two families. Samples were collected from 2002 to 2010 by cage net (50 × 15 × 15 cm, mesh size 0.5 cm) from Zhanjiang mangrove in China (20°36′N; 110°54′E). The total length ranged is between 2.3 and 18.1 cm and weighted between 0.3 and 90.2 g. The allometric coefficient (b) of length‐weight relationship varied from 2.72 for Zenarchopterus buffonis to 3.48 for Acentrogobius viridipunctatus. Length‐weight relationships for these four fish species were determined for the first time.
      PubDate: 2017-11-01T23:56:14.595571-05:
      DOI: 10.1111/jai.13516
       
  • Length‐weight relationships of four fish species from the continental
           shelf of Yucatán (SW Gulf of México)
    • Authors: J. De La Cruz-Agüero; R. Moncayo-Estrada, J. G. Chollet-Villalpando, V. M. Cota-Gómez
      Abstract: This paper presents length‐weight relationships (LWR) for four fish species from the continental shelf of Yucatán, at the Sonda de Campeche (southwestern Gulf of México). Samples were taken using shrimp trawl nets (5.71 cm squared mesh size in the cod‐end) in the mid‐summer of 2016. All LWRs were significant with r2 values ranged from .946 to .994 and the values of exponent b, estimated using simple linear least squares of log‐transformed weight and length data, ranged from 2.54 to 3.10 (p 
      PubDate: 2017-11-01T06:05:22.751358-05:
      DOI: 10.1111/jai.13529
       
  • Twenty‐eight additions to the length‐weight and length‐length
           relationships of Indo‐Pacific fishes from the Davao Gulf, Philippines
    • Authors: A. R. Bos; G. S. Gumanao, M. Silvosa
      Abstract: Selected fish were measured on markets along the Davao Gulf, Philippines between 2009 and 2016, augmenting the number of Length‐Weight relationships (LWR) published earlier for the same area. LWRs were calculated for 28 fishes including those of 12 firstly reported, rare species. SL‐TL and SL‐FL relationships were determined for 28 and 25 species (also including 8 and 12 newly reported relationships, respectively). Minimum size at which individuals start developing forked tails are provided for Cheilinus fasciatus (SL = 15.0 cm), Plectorhinchus polytaenia (SL = 27.0 cm), Pseudobalistes flavimarginatus (SL = 18.0 cm) and Thalassoma hardwicke (SL = 11.5 cm). The flatfish Psettodes erumei had a right‐left eyed ratio of 0.55.
      PubDate: 2017-11-01T03:20:21.965454-05:
      DOI: 10.1111/jai.13525
       
  • Aspects of reproductive biology of the red goby Trypauchen vagina
           (Gobiidae) from the Mekong Delta
    • Authors: Q. M. Dinh
      Abstract: This study provides knowledge on reproductive traits of Trypauchen vagina, a target fish for catching, based on data analysis of 701 individuals collected in the Mekong Delta from January to December 2015. The species is a multiple spawner depositing eggs in early wet season (June–August) since gonadosomatic index reaches a high point during this period, supported by the appearance of ripe and spent gonads at that time. Male and female fish matures firstly at 16.59 and 16.81 cm in total length respectively. The species displays high batch fecundity (4,000–12,750 eggs/female). Knowledge of length at first maturity and spawning season is essential for local authorities to set the suitable fish length and time for fishing. The results provide fundamental information on the reproductive biology and contributed to knowledge for fish population sustainable management.
      PubDate: 2017-10-30T04:21:07.232161-05:
      DOI: 10.1111/jai.13521
       
  • Length–weight relationships of 13 fish species from the Lijiang
           River, China
    • Authors: M.-H. Gao; Z.-Q. Wu, L.-L. Huang, Y. Ding, Z.-J. Zhu
      Abstract: The length–weight relationships (LWRs) of 13 species belong to three orders and four families from the Lijiang River, China. Samples were obtained between 2013 April and 2015 January using gillnets (25 × 12 m, mesh size 0.5 cm), trawl nets (50 × 12 m, mesh size 0.5 cm) and fishhooks (0.5 × 0.5 × 10 m, mesh size 0.5 cm mesh). Exponent b varied from 2.639 to 3.549 and r2 values varied from .962 to .995.
      PubDate: 2017-10-30T04:20:23.151232-05:
      DOI: 10.1111/jai.13523
       
  • Length‐weight relationship of three fish species from the Poyang
           Lake, China
    • Authors: Q.-G. Zhu; L.-L. Sun
      Abstract: The paper reports the length–weight relationships of 3 species from the Poyang Lake, the largest freshwater lake freely connect to the Yangtze River, China. A total of 1,207 specimens were collected seasonally (January, April, September and November, 2010) using various types of fishing gear nets (mesh size: 1–12 cm) and stationary lift nets (mesh size: 0.7–4.4 cm). For each species, the sample size, length range, weight range, LWR, 95% confidence intervals of a and b, and coefficient of correlation were determined. Length‐weight relationships for 1 species were unknown to FishBase, and new maximum lengths are recorded for 2 species.
      PubDate: 2017-10-27T07:26:24.298305-05:
      DOI: 10.1111/jai.13524
       
  • The effect of water velocity on feeding efficiency of juvenile Chinese
           sturgeon, Acipenser sinensis
    • Authors: X. L. Gu; F. Zhao, P. Zhuang, X. T. Shi, G. P. Feng, T. Zhang, J. Y. Liu, B. Kynard
      Abstract: The effect of water velocity on feeding of benthic cruising foragers, like sturgeons, is poorly understood. Using an artificial endless stream, we conducted experiments with wild juvenile Chinese Sturgeon, Acipenser sinensis, to test the hypothesis that water current speed affects juvenile feeding efficiency on the Barcheek Goby, Rhinogobius giurinus, a common wild prey. Feeding consumption (Fc) of juveniles was positively related to water current speed (current speed in cm−1: mean Fc value) follow: 0: 2.33; 11:7.33; 31: 10.67; and 41: 13.7. Thus, current speed had a significant effect on foraging efficiency by sturgeon. The results indicate foraging by wild A. sinensis juveniles on gobies occurs mostly during flood and neap tidal flows when current velocities are fastest.
      PubDate: 2017-10-27T07:26:22.786451-05:
      DOI: 10.1111/jai.13526
       
  • The influence of prey size, sediment thickness and fish size on
           consumption in common sole (Solea solea L.)
    • Authors: S. S. W. Ende; J. W. Schrama, J. A. J. Verreth
      Abstract: This study determined prey consumption in common sole as a function of prey size (0–0.5, 1–1.5, 2–2.5 and 4–5 g), sediment thickness (20 cm and 2 cm) and fish size (50 g, 125 g or 300 g). Prey consumption (in numbers of prey eaten per fish per day) was reduced with increasing prey size and sediment thickness, and was increased with increasing fish size (p 
      PubDate: 2017-10-26T00:10:27.326561-05:
      DOI: 10.1111/jai.13520
       
  • Length–Weight relationships of 23 fish species from floodplain
           ecosystems of the Andean Amazon piedmont, Peru
    • Authors: J. Chuctaya; L. Capitani, D. Faustino, E. Castro
      Abstract: Length–weight relationships (LWRs) for 23 freshwater fish species from the Andean Amazon piedmont in Peru are presented in this study. Fishes were captured between 2009 and 2010 on lagoons from three basins; Amazonas (Ampiyacu and Apayacu) and Ucayali (Pachitea) using gillnets. In this study, new LWRs are reported for 20 species of 23 species analyzed. The study provides new information on less‐studied species and can serve as a basis for management of fisheries and conservation of this area.
      PubDate: 2017-10-24T01:15:19.761336-05:
      DOI: 10.1111/jai.13519
       
  • First record of Dentex canariensis Steindachner, 1881 (Perciformes:
           Sparidae) in the Mediterranean Sea
    • Authors: L. Peña-Rivas; J. Langeneck, E. Azzurro
      PubDate: 2017-10-19T06:05:36.646077-05:
      DOI: 10.1111/jai.13500
       
  • Mortality of Baltic sea trout (Salmo trutta) after release from gillnets
    • Authors: L. Veneranta; T. Pakarinen, E. Jokikokko, I. Kallio-Nyberg, H. Harjunpää
      Abstract: We explore the mortality rate of disentangled sea trout in whitefish fishery using gillnets with a 35–43 mm bar length. The study was conducted during the main fishing seasons in the Gulf of Bothnia in the northern Baltic Sea. Overall 59.5% of the sea trout were alive at the end of a 2–7 day observation period following release from the gillnets. Altogether, 12.1% of the captured fish were found dead in gillnets and 28.4% died due to injuries during an extended observation period. The average length of the captured sea trout was 435 mm, indicating that the majority were spending their first or second year at sea. The proportion of the survived and not injured (no observed damage) fish was highest in larger fish, >450 mm. The injured and not injured fish died equally frequently. Post capture survival was not connected to the removal time from gillnets or type of observed injuries but to the type of entanglement. Most of the fish were entangled by a mesh around the body, which caused extensive scale loss and open sores on the skin. The smallest fish may have had internal wounds that were not registered in this study. These results can be used in fisheries management to estimate the mortality of multi‐species gillnet fishing to sea trout populations in relation to management actions.
      PubDate: 2017-10-11T05:20:59.898916-05:
      DOI: 10.1111/jai.13517
       
  • Length‐weight relationship and relative condition factor of five
           indigenous fish species from Torsa River, West Bengal, India
    • Authors: S. K. Koushlesh; A. Sinha, K. Kumari, S. Borah, T. N. Chanu, R. Baitha, S. K. Das, P. Gogoi, S. K. Sharma, M. H. Ramteke, B. K. Das
      Abstract: Length‐weight relationships (LWRs) for five indigenous fish species under five genera and two families, namely Cyprinion semiplotum (McClelland, 1839), Barilius barna (Hamilton, 1822), Barilius barila (Hamilton, 1822), Gagata sexualis Tilak, 1970 and Pseudolaguvia shawi (Hora, 1921) were studied from Torsa River in West Bengal, India. Sampling was done at quarterly intervals from November, 2015 to December, 2016 and a total of 701 fish specimens were collected using cast nets (mesh size of 15–20 mm), gill nets (mesh size 20–35 mm) and bamboo traps. In the present study, b value ranges from 2.686 to 3.268. LWRs for these fish species (except P. shawi) have not been reported in FishBase. A new maximum length has been recorded for P. Shawi and G. sexualis. The relative condition factor (Kn) values was found to range from 1.004 to 1.028.
      PubDate: 2017-10-06T23:55:18.67652-05:0
      DOI: 10.1111/jai.13518
       
  • Prevalence and intensity of Allocreadium isoporum (Digenea:
           Allocreadiidae) in three endemic species of cyprinids (Capoeta spp.) in
           Turkey, in relation to season, host size and sex
    • Authors: Ali Aydogdu; Gerardo Pérez-Ponce de León, Yilmaz Emre, Nesrin Emre, Ayşegül Yabacı
      Abstract: Three species of cyprinids, i.e., Capoeta antalyensis (n = 112), C. caelestis (n = 99) and C. angorae (n = 178) were collected from the Anatolian Region of Turkey to carry out this investigation. A total of 389 specimens of Capoeta were examined for Allocreadium isoporum infections throughout the four different seasons of 2012. The prevalence and mean intensity of infection of A. isoporum was investigated in relation to the host species, the seasons across the year, host size, and sex. Two‐hundred and twenty‐two specimens of a trematode identified as A. isoporum were found in these fishes. One‐hundred seventy‐eight C. angorae were caught, and 70 A. isoporum were recorded in 8 of 178 fish examined, with prevalence and mean intensity of infection of 4.49% and 8.7% parasites per infected fish, respectively. In the 112 specimens of C. antalyensis, 73 individuals of A. isoporum were found, with a prevalence of 19.6% and a mean intensity of 3.3. As for the infection in C. caelestis, a total of 79 specimens of A. isoporum were found in 17 of the 99 fish examined, with prevalence and mean intensity of infection of 17.1% and 4.6%, respectively. Prevalence and mean intensity values in relation to host size and sex, as well as the seasonality of infections was analyzed and the results were compared with other studies. The trematode A. isoporum is reported for the first time parasitising three endemic species of Capoeta spp. in Turkey, adding to the knowledge of geographical distribution and host range of this trematode species.
      PubDate: 2017-10-06T23:40:32.331408-05:
      DOI: 10.1111/jai.13515
       
  • Habitat associations of shovelnose sturgeon Scaphirhynchus platorynchus
           (Rafinesque, 1820) in the lower Platte River, Nebraska
    • Authors: J. J. Hammen; M. J. Hamel, M. L. Rugg, M. A. Pegg
      Abstract: Human induced alterations of river systems are ubiquitous throughout the world. Alterations have reduced riverine habitat and negatively affected riverine species; therefore, it is crucial to understand what habitats are important to riverine fish at multiple scales. Most research has focused around microhabitats (i.e., depth) with little effort on how the reach scale habitat (i.e., geomorphic landscape) influences riverine fish abundance. We examined habitat associations of shovelnose sturgeon sampled with two gears (trotlines and trammel nets) at multiple spatial scales in the lower Platte River, NE, a system that has not been overtly altered in physical description. At a microhabitat scale, shovelnose sturgeon abundance was influenced by velocities and temperatures within the lower Platte River. The influence of velocity was contradictory between gears suggesting that gear limitations may have been present. Shovelnose sturgeon abundance increased in close proximity to a tributary interaction with the lower Platte River in both gears. Portions of the river with a relatively medium valley width, low‐medium sinuosity, and wide channel had the lowest shovelnose sturgeon abundance for both gears. Our results provide insight at multiple habitat scales on the landscape that may help managers and policy makers develop sound approaches to protecting and mitigating habitat for shovelnose sturgeon and other riverine species.
      PubDate: 2017-10-05T06:15:35.238102-05:
      DOI: 10.1111/jai.13513
       
  • Length‐weight relationships of nine fish species from the Qingjiang
           River, Yangtze River basin, China
    • Authors: G. Huang; Q. D. Wang, X. H. Chen, T. Yuan, T. Xiang, J. S. Liu, J. Yuan, Z. J. Li
      Abstract: This study presents the first report of length‐weight relationships (LWRs) for five fish species (Parabotia fasciata, Megalobrama mantschuricus, Plagiognathops microlepis, Rhodeus sinensis, Rhodeus fangi) and maximum total lengths for four species from the Qingjiang River, Yangtze River basin, China. Specimens were sampled in six sections along the Qingjiang River over a period of 1 year between April 2016 and March 2017 with gill nets (150 × 10 m; mesh size: 1–14 cm), benthic fyke nets (mouth opening: 12 × 12 cm; 10 m; mesh size: 1 cm) and stationary lift nets (10 × 10 m; mesh size: 0.8 cm).
      PubDate: 2017-10-04T05:45:24.503905-05:
      DOI: 10.1111/jai.13510
       
  • Are shovelnose sturgeon a valid diet surrogate for endangered pallid
           sturgeon during the first year of life'
    • Authors: N. J. C. Gosch; A. P. Civiello, T. R. Gemeinhardt, J. L. Bonneau, J. M. Long
      PubDate: 2017-10-04T05:10:24.817877-05:
      DOI: 10.1111/jai.13512
       
  • Multiple origins of stone loach, Barbatula barbatula (Teleostei:
           Nemacheilidae), in Sweden based on mitochondrial DNA
    • Authors: M. Norén; S. Kullander, T. Nydén, P. Johansson
      Abstract: Stone loach, Barbatula barbatula, occurs in scattered localities in Sweden. Some of the populations have usually been considered as feral descendants of escaped 18th Century pond stock, but historical documentation is inconclusive. Using the mitochondrial COI gene as a marker, we analyzed specimens from seven Swedish localities. One of the middle Swedish localities, in Stockholm, belongs to a haplotype found also in Poland and Lithuania. Two other samples, from near Nyköping and Lake Hjälmaren, belong to a haplotype found in northeastern Europe (Finland, Estonia, Latvia, Volga basin in Russia). Those two Swedish populations are probably descendants from at least two introductions, probably for pond rearing for human consumption. Samples from Skåne and Halland in southern Sweden belong to the haplotype found in Denmark, northern Germany and Poland; and whereas it remains possible that they also represent feral populations, they may be naturally occurring, having reached Sweden during the Ancylus period, about 8,000–10,000 years ago. A recently discovered population from the central South Swedish Highlands belongs to a mainly southeastern European haplotype. It probably represents a release of imported aquarium specimens or live bait carried by sport fishing tourists.
      PubDate: 2017-09-28T01:20:54.422267-05:
      DOI: 10.1111/jai.13507
       
  • Relationships between total length and otolith measurements for 36 fish
           species from Gökçeada Island, Turkey
    • Authors: A. Altin; H. Ayyildiz
      Abstract: The relationships between fish total length and otolith measurements (OL, OW and OR) were described by means of allometric power equation for 36 fish species from Gokceada Island, Turkey. Regressions were also estimated at genus level. A total of 14364 specimens were collected monthly using beach seine (0–2 m) and beam trawl (5–20 m) from June 2013 to June 2014. Generally, the otolith length showed the highest correlation for predicting fish total length. This paper represents the first relationships between otolith morphometrics and fish total length for 12 species. These relationships can be useful for researchers who examining stomach contents of piscivorous predators.
      PubDate: 2017-09-27T01:40:24.835591-05:
      DOI: 10.1111/jai.13509
       
  • Length–weight relationships of five mullet fish species from the
           Southern Taiwan coast
    • Authors: F.-J. Lin; W.-K. Wang, M.-J. Chen, H.-D. Lin, Y.-T. Ueng
      Abstract: The length–weight relationships (LWRs) are described for five fish species, Liza affinis (Gunther, 1861), Liza alata (Steindachner, 1892), Chelon subviridis (Valenciennes, 1836), Chelon macrolepis (Smith, 1846) and Oedalechilus labiosus (Valenciennes, 1836), obtained from Southern Taiwan coast during July 2013 to October 2016.The length–weight parameter b for these species ranged from 2.734 to 2.974, with regression coefficients (r2) ranging from 0.966 to 0.979.
      PubDate: 2017-09-27T01:40:20.099558-05:
      DOI: 10.1111/jai.13506
       
  • Morphometric relationships for some species of elasmobranch from tropical
           eastern Pacific
    • Authors: C. Polo-Silva; G. Acevedo, S. Siu, J. M. Carvajal, M. Ixquiac, S. Bessudo, A. M. Suarez, V. Puentes
      Abstract: This study proposes length relationship equations to determine total length of four species of sharks (Carcharhinus falciformis, Mustelus lunulatus, Sphyrna lewini and Carcharhinus limbatus) based on trunk lengths (TrL) and interdorsal lengths (IL) caught in Colombia and Central America Pacific Ocean. In Central American Pacific, data were recorded for C. falciformis, C. limbatus and S. lewini between 2006 and 2012. In the Colombian Pacific, data was recorded in 1994–1995 and from 2006 to 2012 for C. falciformis, S. lewini and M. lunulatus. In the Central American Pacific the IL – TL relationship was acceptable for C. falciformis (r2 = .69) and C. limbatus which presented a good relationship (r2 = .81) where most specimens were juveniles; the same trend was found for S. lewini (r2 = .96). The TL‐TrL relationship estimated for species caught in the Colombian Pacific was significant for C. falciformis (r2 = .98) and for M. lunulatus (r2 = .84); however, for S. lewini this relationship was low (r2 = .55). Results indicate this is a useful tool for fishery statistics and fishery management for elasmobranch species of the Eastern Tropical Pacific.
      PubDate: 2017-08-04T01:57:27.692597-05:
      DOI: 10.1111/jai.13460
       
  • Issue Information
    • First page: 1071
      PubDate: 2017-11-10T06:55:40.718839-05:
      DOI: 10.1111/jai.13546
       
  • Length‐ and age‐based demographics of exploited populations of stout
           whiting, Sillago robusta Stead, 1908
    • Authors: C. A. Gray; L. M. Barnes, W. D. Robbins, D. E. Meulen, F. A. Ochwada-Doyle, B. W. Kendall
      First page: 1073
      Abstract: This study assessed variability in the length and age compositions, longevity, length‐at‐age and rates of growth and mortality of the east Australian stout whiting Sillago robusta Stead, 1908 population harvested by demersal trawl fisheries. Sampling was done over 2 years and was spatially stratified across three depth strata between 11 and 90 m at two locations approximately 400 km apart. There were no consistent depth‐related differences in length and age compositions, but the mean and median length and age of the population was greater at the lower latitude location. Age classes 2 and 3 years dominated samples in the north, and 1 and 2 years in the south. Observed longevity was 10 years in the north, and 6 years in the south. Mean length‐at‐age was not consistently different between sexes, years or locations, nor did the von Bertalanffy growth function differ significantly between sexes, even though females had a greater estimated L∞ (23.45 cm FL) compared to males (22.36 cm FL). Estimated natural mortality (M) ranged between 0.42 and 0.77, using age‐ and length‐based methods. Age‐based catch‐curve analyses identified the instantaneous rate of total mortality (Z) to range between 1.48 and 2.70, with subsequent estimates of fishing mortality (F) ranging between 1.15 and 2.00, being greater than M. Exploitation rates (E) were greater than 0.7, indicating that S. robusta at the study locations was heavily fished. The data provided here can be used as a basis to evaluate future fishery‐ and climate‐related changes in the population demographics of east Australian S. robusta.
      PubDate: 2017-08-04T01:57:10.656522-05:
      DOI: 10.1111/jai.13464
       
  • Backpack electrofishing effort and imperfect detection: Influence on
           riverine fish inventories and monitoring
    • Authors: S. M. Reid; T. J. Haxton
      First page: 1083
      Abstract: An increased electrofishing sampling effort will increase detection probabilities of riverine fishes. In this study, a repeat‐sampling approach was used in small to medium‐sized Ontario (Canada) rivers to estimate: (i) species‐specific detection probabilities of freshwater fishes, (ii) the number of sampling events required to confidently detect species, and (iii) the power of timed‐search surveys to detect future distribution (or occupancy) declines. Wadeable habitats at 36 sites were sampled with a backpack electrofisher on four separate dates during the summer low‐flow period in 2013 and 2014. Forty‐two species were collected, including three species of conservation concern (American eel Anguilla rostrata Lacépède, 1802, channel darter Percina copelandi Jordan, 1877, northern sunfish Lepomis peltastes Cope, 1870), and two recreationally important species (largemouth bass Micropterus salmoides Lacépède, 1802 and smallmouth bass Micropterus dolomieu Lacépède, 1802). A hierarchical Bayesian modelling approach was used to estimate detection probabilities and site occupancy for 18 species at four levels of effort: 250, 500, 750 and 1,000 s. In all cases, species detection was imperfect. Search effort had a positive effect on estimates of detection probability and site occupancy and the power to detect declines in future distribution. Detection probabilities ranged from 0.11 to 0.66 with an effort of 250 s, and 0.27 to 0.92 with an effort of 1,000 s. For 13 species, detection and power to detect changes in distribution were significantly improved by increasing sampling effort from 250 to 750 s or 1,000 s. For the channel darter and northern sunfish, three replicate sampling visits (of 750 or 1,000 s duration) are recommended for confident detection.
      PubDate: 2017-09-13T05:55:35.29118-05:0
      DOI: 10.1111/jai.13463
       
  • Daily movement behavior of two Neotropical armored catfish species
           (Ancistrus aff. cirrhosus Valenciennes, 1836 and Hypostomus ancistroides
           Ihering, 1911) at a road‐stream crossing culvert
    • Authors: L. F. Celestino; F. J. Sanz-Ronda, E. A. L. Kashiwaqui, E. F. Celestino, M. C. Makrakis, S. Makrakis
      First page: 1092
      Abstract: We hypothesized that the use of habitat by two armored catfish species, Ancistrus aff. cirrhosus and Hypostomus ancistroides, which share the same stream reach, is temporally segregated. To test this, fish residence time within a culvert and fish movements through the culvert were analyzed in relation to the daily hours, lunar cycle and discharge using Passive Integrated Transponder telemetry. The residence time for A. aff. cirrhosus conducting upstream movements was longer than H. ancistroides. Both species exhibited high nocturnal activity, although at different periods: A. aff. cirrhosus was most active at dawn (00:00–05:59 hr), while H. ancistroides exhibited intense activity at night (18:00–23:59 hr), indicating temporal segregation of movement behavior between species. In addition, A. aff. cirrhosus was most active in the new moon phase and when there was high water discharge, while H. ancistroides was most active only when there was high water discharge. This study elucidates the patterns of daily movement behavior and temporal habitat use of these fish species.
      PubDate: 2017-08-01T01:21:05.560954-05:
      DOI: 10.1111/jai.13446
       
  • The Chinese sleeper (Perccottus glenii Dybowski, 1877) in Ukraine: New
           data on distribution
    • Authors: I. Kutsokon
      First page: 1100
      Abstract: The Chinese sleeper Perccottus glenii Dybowski, 1877 is one of the most successful alien species in Europe today. This article is a review of the current distribution of the species in Ukraine using published data, own field studies (2005–2016) and collections from museums and colleagues. The Chinese sleeper has been confirmed in the Vistula, Danube, Dniester, Southern Bug and Dnipro river basins, with earlier occurrence (1970s–90s) in the Vistula, Danube and Dniester river basins. As a result, the species is distributed more evenly in these river basins. The Chinese sleeper was first recorded in the Dnipro and Southern Bug river basins in the 21st century; hence, its occurrence is still irregular. Present data suggest that, in some regions, the species could inhabit not only floodplains and bays but also fluvial river sections.
      PubDate: 2017-08-14T00:36:16.858035-05:
      DOI: 10.1111/jai.13454
       
  • Effects of water temperature and initial weight on growth, digestion and
           energy budget of yellow catfish Pelteobagrus fulvidraco (Richardson, 1846)
           
    • Authors: L. Zhang; Z.-G. Zhao, Q.-X. Fan
      First page: 1108
      Abstract: The effects of water temperature and body weight on feeding, growth, and energy budget were inevitable in the yellow catfish Pelteobagrus fulvidraco (Richardson, 1846), an important fish cultivated in China. This study explores the interaction of water temperature and body weight on both energy utilization strategy and energy conversion efficiency to promote further healthy culture of yellow catfish. Fish with body weights of 6 g (Group S), 16 g (Group M) and 35 g (Group B) were reared in 15 circular glass steel cylinders 80 cm in diameter × 70 cm in height (180 L) at water temperatures of 21, 24, 27, 30 and 33°C (3 replicates for each temperature) for 42 days to investigate effects of water temperature and body weight on the feeding, growth, digestion and energy budget in yellow catfish. Results showed that the levels of dry matter, protein and energy in the body were significantly affected by water temperature (p 
      PubDate: 2017-08-04T01:56:15.096061-05:
      DOI: 10.1111/jai.13465
       
  • Comparative analyses of reproductive activity in Schizodon knerii
           (Steindachner, 1875) (Characiformes: Anostomidae) in three sections of the
           São Francisco River basin
    • Authors: L. de Esquivel Dias Brandão; A. Virtude do Nascimento, L. Marcon, J. Enemir dos Santos, K. Biana Santiago, E. Rizzo, N. Bazzoli
      First page: 1118
      Abstract: This paper aims to establish possible changes in the main reproductive parameters of the so‐called piau‐branco, Schizodon knerii, in three sections of the São Francisco River basin. Fish (n = 388) were captured quarterly between May 2012 and April 2013 from three sections of the São Francisco River (SFR): section 1 = Três Marias Reservoir (TMR), a lentic environment; section 2 = SFR, the first 34 km downstream of TMR, a lotic environment in which the temperature, oxygen levels, and flow are not suitable for reproduction; section 3 = SFR, 34–54 km downstream from TMR after the confluence with the Abaeté River, a lotic environment in which temperature, oxygen levels and flow are suitable for reproduction. In section 2, females and males showed lower values of total length and body weight in relation to fish from sections 1 and 3. The reproductive mode of S. knerii in sections 1 and 3 exhibited a prolonged reproductive period, parceled spawning, and a reproductive peak from January to March. In section 2, neither spawning females or spermiated males were captured, probably due to the fact that this section receives cold water with low oxygen levels from the hypolimium of the dam that presents thermal stratification in the summer. This study showed in section 2, immediately downstream of the Três Marias Reservoir, that S. knerii does not reproduce successfully.
      PubDate: 2017-08-04T01:56:59.291189-05:
      DOI: 10.1111/jai.13457
       
  • Assessment of Epinephelus coioides (Hamilton, 1822) aquaculture systems in
           the Gulf of Tonkin, Vietnam, by using fish parasites
    • Authors: T. V. Truong; K. Neubert, P. Unger, T. Q. Bui, H. T. T. Ngo, H. W. Palm, S. Kleinertz
      First page: 1125
      Abstract: The parasite fauna of Epinephelus coioides can be used as an indicator to assess different aquaculture systems. A total of 133 E. coioides were collected from fishermen (wild fish) and marine fish farms (net cages, pond farms) in the Gulf of Tonkin (Ha Long, Cat Ba and Nghia Hung), Vietnam in 2013 and 2014, and examined for the presence of protozoan and metazoan parasites. Different patterns of parasite infections were found. The monogenean Pseudorhabdosynochus spp. was predominant in the net cage system; and the protozoans Trichodina spp. and Cryptocaryon irritans were found exclusively in pond and net cage cultivation sites in Nghia Hung and Cat Ba. These three species were assessed in addition to seven further indicator species and two dominance indices, to visualize the potential of assessing different aquaculture systems in Vietnam. This suggests the use of former shrimp ponds for grouper cultivation, reducing the pressure to further extend net cage cultivation in already highly influenced mariculture regions in Vietnam.
      PubDate: 2017-08-14T00:36:31.937347-05:
      DOI: 10.1111/jai.13475
       
  • Morphological and morphometric changes of sagittae otoliths related to
           fish growth in three Mugilidae species
    • Authors: R. Callicó Fortunato; V. Benedito Durà, M. González-Castro, A. Volpedo
      First page: 1137
      Abstract: The aim of this study was to analyze morphologic and morphometric changes of sagittae otoliths throughout the growth of three mullets: Mugil liza, Mugil cephalus and Liza ramada. Fish were collected seasonally between October 2011 and April 2014, and three methods were used: regression analysis of traditional biometric characters; morphological analysis for group identification; and morphometrical analysis of shape indices among groups (circularity, rectangularity, aspect ratio and percentage occupied by the sulcus). In all species, dependence of standard length on otolith length and height were best described as power functions. Two morphological groups were identified for M. liza and M. cephalus, while three for L. ramada. Morphological changes were supported by morphometry differences only for the first two species. Smaller size specimens of M. liza had more rectangular otoliths with more percentage covered by the sulcus while bigger fish tended to have a more circular shape. For M. cephalus smaller size fish had a more elliptical shape. The observed changes may be reflecting life history changes, related to habitat or dietary shifting.
      PubDate: 2017-08-16T02:26:06.354749-05:
      DOI: 10.1111/jai.13479
       
  • Influence of cortisol along the pituitary-ovary axis in the cichlid fish
           Oreochromis mossambicus
    • Authors: A. Chabbi; C. B. Ganesh
      First page: 1146
      Abstract: Cortisol is the principal glucocorticoid released due to various forms of environmental as well as aquacultural stressors in fish. The aim of the present investigation was to determine cortisol-induced alterations along the luteinizing hormone (LH)-secreting cells–ovary axis in the tilapia Oreochromis mossambicus. Administration of cortisol to stripped O. mossambicus for a period of 22 days during the ovarian cycle caused significantly higher number of follicles with chromatin nucleoli (stage I) compared to those of initial controls and controls. Whereas the number of follicles at perinucleolar (stage II) and vitellogenic (stage IV) stages did not differ significantly between controls and cortisol-treated fish, the number of follicles at cortical alveolar stage (stage III) was significantly lower in cortisol-treated fish than in controls. While the stage V follicles (maturation stage) were absent in initial controls, their presence in controls was concomitant with intensely labelled LH-secreting cells in the proximal pars distalis (PPD) region of the pituitary gland during prespawning phase. However, cortisol-treatment resulted in complete absence of stage V follicles associated with weakly immunoreactive LH-content in the PPD region of the pituitary gland during prespawning phase. These results suggest that chronic cortisol- treatment causes suppression of LH-secreting cells activity and blocks progression of vitellogenic follicular development process in O. mossambicus.
      PubDate: 2017-08-14T00:38:10.202372-05:
      DOI: 10.1111/jai.13480
       
  • Testing baits prepared from by‐product of the shrimp and snow crab
           industry in the pot fishery for Gadus morhua (Linnaeus, 1758) and
           Pollachius virens (Linnaeus, 1758)
    • Authors: S. I. Siikavuopio; R. Dragøy Whitaker, G. Martinsen, B.-S. Sæther, S. K. Stormo
      First page: 1153
      Abstract: In a study between October and November 2015 in northern Norway, bait prepared from the by‐product of the shrimp and snow crab industry was employed in the pot fishery to capture cod and saithe. Frozen natural herring was used as control bait. Pots with the three bait types were placed 1,000 m apart in order to eliminate the risk of interaction between the different baits. In total 11 sampling periods were conducted. There were no significant differences in catch rates between the different baits tested on cod and saithe. The manufactured bait tested in this study showed a continuous release of odours over a 14‐day period. Results show that the water content of the bait increases rapidly in the first phase of the immersion (until day 7), and the corresponding loss of bait mass (dry weight) suggest some physical disintegration (erosion) of the bait until the water content stabilizes. This study illustrates that it is possible to replace natural herring with hydrolysates from by‐products from shrimp or snow crab industry in the Norwegian pot fishery of cod and saithe.
      PubDate: 2017-08-04T01:57:20.691727-05:
      DOI: 10.1111/jai.13468
       
  • Comparative diets and foraging strategies of subyearling Atlantic salmon,
           brown trout, and rainbow trout during winter
    • Authors: J. H. Johnson; J. A. DiRado, G. Mackey, R. Abbett
      First page: 1158
      Abstract: Over-winter survival of salmonids in streams is thought to be an important population regulation mechanism. Yet because of the difficulty of conducting field studies due to adverse weather or ice conditions, compared to other seasons, salmonid ecology during winter is least understood. Consequently, we sought to examine interspecific feeding associations of an important salmonid stream assemblage in the Lake Ontario watershed during winter. The diets of Atlantic salmon (Salmo salar) parr, brown trout (S. trutta) parr, and rainbow trout (Oncorhynchus mykiss) parr were significantly different in February but not in March. Salmonid diets differed from the benthos and the drift during both months. Dipterans (chironomids, simuliids, and tipulids) and ephemerellids were the major prey taxa consumed. All three species fed more heavily on prey items from the benthos than from the drift. The diet of Atlantic salmon had the highest similarity to the benthos whereas the diet of brown trout had the lowest similarity to the drift. All three salmonid species generally selected ephemerellids, limnephilids, and chironomids and avoided elmids. These winter feeding observations are the first reported for this specific salmonid assemblage and will help managers better understand interspecific associations during this critical period.
      PubDate: 2017-08-28T00:45:35.479742-05:
      DOI: 10.1111/jai.13488
       
  • Movement of small‐bodied fishes from Lake Michigan into Chicago Area
           Waterways: Insights from otolith chemistry
    • Authors: N. P. Rude; A. J. Yung, G. W. Whitledge
      First page: 1166
      Abstract: The Chicago Area Waterways System (CAWS), an artificial connection between Lake Michigan (LMI) and the Illinois River watershed, has served as a conduit for invasive species and is a potential pathway for viral hemorrhagic septicemia (VHS) to spread from the Great Lakes into the Illinois River drainage. Although some fishes are known to have moved from LMI into the Illinois River via the CAWS, the rate of fish passage from the lake into the CAWS is unclear. Stable carbon isotopic signatures (δ13C) in otoliths differ between lake‐ and CAWS‐resident fish and were used as a natural tag to identify individuals that may have moved into the CAWS from LMI. The objectives of this study were to (i) estimate relative frequency of individuals with otolith δ13C indicative of prior residency in LMI among small‐bodied (
      PubDate: 2017-09-18T01:25:45.414165-05:
      DOI: 10.1111/jai.13499
       
  • The use of live and frozen Artemia salina nauplii enriched with
           fluorochromes for mass‐marking vendace Coregonus albula (L.) larvae
    • Authors: K. Stańczak; K. Mierzejewska, J. Król, P. Hliwa
      First page: 1173
      Abstract: The aim of this study was to investigate the use of Artemia salina nauplii enriched with chosen fluorochromes for mass marking vendace Coregonus albula (L.) larvae. In the experiment, vendace larvae (6 DPH) were fed with live or frozen A. salina nauplii immersed in tetracycline hydrochloride (TC), calcein (Cal) or alizarin red S (ARS) for four subsequent days. More successful effects (marking otoliths) were obtained by feeding the fish with live nauplii enriched with fluorochromes, regardless of the dye type. The highest percentage of marked otoliths (100%) was recorded in the group fed with live nauplii immersed in TC. In the groups fed live or frozen nauplii enriched with Cal and ARS, a lower percentage of marked individuals (63.3%–73.7% and 56.7%–63.3%, respectively) were recorded. The survival rate of vendace larvae in particular groups oscillated between 93.7% and 95.7%. There were no significant differences in the total body length and body weight of the reared vendace larvae among different groups. In conclusion, for mass marking of vendace larvae using a feeding method, fish fed A. salinalive nauplii enriched with TC at a dose of 600 ppm is recommended for fishery practice.
      PubDate: 2017-08-01T01:21:55.76003-05:0
      DOI: 10.1111/jai.13447
       
  • Diversity of parasites in Cichlasoma amazonarum Kullander, 1983 during
           rainy and dry seasons in eastern Amazon (Brazil)
    • Authors: A. A. Carvalho; M. Tavares-Dias
      First page: 1178
      Abstract: This study investigated the influence of the rainy and dry seasons on the parasite communities of Cichlasoma amazonarum (Kullander, 1983) in a tributary of the Amazon River system, northern Brazil. Of 112 fish examined, 95.5% were parasitized by Ichthyophthirius multifiliis, Piscinoodinium pillulare, Gussevia disparoides, Posthodiplostomum sp., Procamallanus (Spirocamallanus) inopinatus, and Echinorhynchus paranensis, as well as by the Glossiphoniidae leech. Ichthyophthirius multifiliis and P. pillulare were the dominant parasite species, with I. multifiliis the most prevalent and abundant; the leech (Glossiphoniidae) was the least prevalent and least abundant. Parasites presented an aggregate dispersion pattern and seasonal variations in infestation levels, influenced by the environmental conditions in the rainy season. Variation in the parasite dynamics created overall changes in the parasite communities, characterized by greater diversity, species richness and evenness during the rainy season. However, there was a high similarity (99.8%) in the parasite community structure between the rainy and dry seasons. During the dry season the hosts had predominantly 1–3 parasite species compared to 3–4 parasites in the rainy season. Some parasites in the eastern Amazon undergo population changes relating to seasonality. These results thus indicate the correct season to apply adequate prophylactic measures to reduce negative impacts of parasites in this wild ornamental fish when captured.
      PubDate: 2017-08-10T00:07:31.599735-05:
      DOI: 10.1111/jai.13451
       
  • Effect of conservation of fish in formalin and ethanol on length-weight
           relationships and condition factor in Tlaloc labialis (Günther, 1866)
    • Authors: M. J. Anzueto-Calvo; E. Velázquez-Velazquez, W. A. Matamoros, B. G. A. Cruz Maza, A. Nettel-Hernanz
      First page: 1184
      Abstract: The effect of the preserver on the length-weight relationship and condition factor were estimated using 50 specimens of Tlaloc labialis; a small stream fish from the Grijalva River basin, México. They were measured at different stages of preservation: freshly collected, fixed in 10% formalin and preserved in 70% ethanol for over a 2 years period. All fish decreased in weight and condition factor, with very significant differences compared to the fresh material. The value of the coefficient (b) increased and stabilized from the second month of preservation in ethanol.
      PubDate: 2017-08-17T08:26:09.043419-05:
      DOI: 10.1111/jai.13461
       
  • Relationships between fish and otolith size of nine deep‐sea fishes from
           the Andaman and Nicobar waters, North Indian Ocean
    • Authors: K. V. Aneesh Kumar; R. Nikki, K. Oxona, M. Hashim, M. Sudhakar
      First page: 1187
      Abstract: The study presents for the first time the otolith morphology of nine species of deep‐sea fishes. This study was based on sampling carried out on‐board FORV Sagar Sampada (Cruise No 349) during March‐April 2016, along the continental margin of the Andaman and Nicobar Islands in the Bay of Bengal using high speed demersal trawl. Unbroken (complete) otoliths from Polymixia fusca Kotthaus, 1970, Neoepinnula orientalis (Gilchrist & von Bonde 1924), Chlorophthalmus nigromarginatus (Kamohara, 1953), Cubiceps baxteri (McCulloch, 1923), Bembrops caudimacula (Steindachner, 1876), Neoscopelus microchir (Matsubara, 1943), Ostracoberyx dorygenis Fowler, 1934, Synagrops japonicus (Döderlein, 1883), and Bathyclupea hoskynii Alcock 1891) were used for this study. Length–weight relationships (LWR) and the regression between otolith size (width, weight, area and perimeter) and fish length (TL) of nine deep‐sea Fishes were considered. Numerical relationships derived from the relationship between otolith size and the fish can be used as predictors to estimate the prey size as well as to understand trophic relations and food web dynamics of these hitherto unexamined deep‐sea ichthyofauna. LWR showed negative allometric otolith growth in five species; four species showed positive allometric growth. Otolith size to fish size (TL) relation is explained by a simple linear regression considering otolith width (OW), otolith weight (OWe), otolith area (OA) and otolith perimeter (OP). Stronger r2 values (>.76) indicate robustness, except for Cubiceps baxteri (r2 = .65), and give better estimates for the TL of the fish.
      PubDate: 2017-08-04T01:56:26.766487-05:
      DOI: 10.1111/jai.13467
       
  • Development and characterization of microsatellite loci in Amazonian dwarf
           cichlids Apistogramma spp. (Perciformes: Cichlidae): Uncovering geological
           influence on Amazonian fish population
    • Authors: C. S. S. Leitão; C. H. A. Santos, É. M. S. Souza, G. C. C. Vilarinho, M. N. Paula-Silva, P. Val, A. L. Val, V. M. F. Almeida-Val
      First page: 1196
      PubDate: 2017-09-10T23:41:05.771825-05:
      DOI: 10.1111/jai.13490
       
  • Bull ray, Aetomylaeus bovinus (Geoffroy Saint‐Hilaire, 1817)
           (Myliobatidae) in the Mediterranean Sea and captures of juveniles from
           Izmir Bay (Aegean Sea, Turkey)
    • Authors: O. Akyol; I. Aydın, O. El Kamel-Moutalibi, C. Capapé
      First page: 1200
      PubDate: 2017-08-01T01:20:43.604667-05:
      DOI: 10.1111/jai.13420
       
  • Development and characterization of 13 polymorphic microsatellite DNA
           markers for pink salmon (Oncorhynchus gorbuscha) using next‐generation
           sequencing approach
    • Authors: H. Tsukagoshi; S. Terui, S. Sato, S. Abe
      First page: 1204
      PubDate: 2017-07-25T23:36:13.290482-05:
      DOI: 10.1111/jai.13436
       
  • First records of xanthochromism in three‐bearded rockling Gaidropsarus
           vulgaris (Cloquet, 1824) and pollack Pollachius pollachius (Linnaeus,
           1758)
    • Authors: D. T. G. Quigley; R. Lord, D. MacGabhann, K. Flannery
      First page: 1208
      PubDate: 2017-07-25T23:36:46.826187-05:
      DOI: 10.1111/jai.13456
       
  • A new distribution of the buffon's river garfish, Zenarchopterus buffonis
           (Valenciennes, 1847) in the southern coastal rivers of Bangladesh
    • Authors: M. A. Hanif; M. A. B. Siddik, A. Nahar, M. R. Chaklader, R. Fotedar
      First page: 1211
      PubDate: 2017-08-14T00:35:25.522632-05:
      DOI: 10.1111/jai.13462
       
  • Age and growth of Triplophysa anterodorsalis Zhu & Cao, 1989 in the
           Heishui River, China
    • Authors: C. Wang; Y.-Q. Liang
      First page: 1215
      PubDate: 2017-08-04T01:57:14.917429-05:
      DOI: 10.1111/jai.13466
       
  • Finfish species richness and structure in the tidal-associated lagoons of
           Badin, Sindh, Northern Arabian Sea
    • Authors: K. P. Awan; N. Qamar, N. Farooq, S. K. Panhwar
      First page: 1218
      PubDate: 2017-08-14T00:36:24.611909-05:
      DOI: 10.1111/jai.13471
       
  • First record of tub gurnard, Chelidonichthys lucerna (Linnaeus, 1758),
           from the south‐eastern Baltic Sea (Lithuania)
    • Authors: J. Dainys; Ž. Pūtys, E. Bacevičius, J.-C. Shiao, Y. Iizuka, E. Jakubavičiūtė, L. Ložys
      First page: 1223
      PubDate: 2017-09-10T23:41:41.948595-05:
      DOI: 10.1111/jai.13491
       
  • Length–weight relationships of six fish species from the Coastal
           Waters of Jask, Iran
    • Authors: M. Saberi; S. Y. Paighambari, M. Darvishi, G. Farkhondeh Shilsar
      First page: 1226
      Abstract: The length–weight relationships (LWRs) for six species were determined, namely Carangoides chrysophrys (Cuvier, 1833), Drepane longimana (Bloch & Schneider, 1801), Euthynnus affinis (Cantor, 1849), Polydactylus plebeius (Broussonet, 1782), Pomadasys kaakan (Cuvier, 1830) and Pseudorhombus elevatus (Ogilby, 1912). Fish was sampled from the Coastal Waters of Jask, Iran (located in Hormozgan Provinces) between October 2011 and March 2012. This work revises previous literature in the Jask and provides the first reference on weight–length parameters for two fish species worldwide and for six species of the Coastal Waters of Jask, Iran.
      PubDate: 2017-10-31T23:30:30.365374-05:
      DOI: 10.1111/jai.13326
       
  • Length–weight relationships of three endangered tidal pool fish
           species on Jeju Island, Korea
    • Authors: H. J. Kwun; J. Park, H.-S. Kim, H. Bae, S. J. Jeong
      First page: 1229
      Abstract: The length–weight relationships (LWRs) of three endangered tidal pool fishes, Spratelloides gracilis (Temminck & Schlegel, 1846), Atherion elymus Jordan & Starks, 1901, and Enneapterygius etheostomus (Jordan & Snyder, 1902), from Jeju Island, Korea, were analysed. A total of 280 specimens were sampled using hand nets (mesh size 1 mm) or by dredge (mesh size 5 mm) from July 2015 to July 2016. This study provides the first LWRs for two species, a new LWR for one species, and a new maximum length data for two species.
      PubDate: 2017-09-19T07:45:52.624043-05:
      DOI: 10.1111/jai.13400
       
  • Length–weight relationships of 10 fish species from Shengsi Ma'an
           Archipelago Special Marine Protected Area, East China Sea
    • Authors: K. Wang; C.-W. Li, Z.-H. Wang, J. Zhao, S.-Y. Zhang
      First page: 1231
      Abstract: The length–weight relationships (LWR) for 10 species belonging to seven families from the Shengsi Ma'an Archipelago Special Marine Protected Area (East China Sea) are presented. Four fishes had no previous LWR estimates in FishBase, and one new maximum fish length was recorded in the study.
      PubDate: 2017-09-10T23:41:36.601876-05:
      DOI: 10.1111/jai.13398
       
  • Length‐weight relationships of five Triplophysa species from the
           northwest of China
    • Authors: S. Chen; C. Xie, D. Li, N. Yao, H. Ding, Z. Zhang
      First page: 1234
      Abstract: Length‐weight relationships were estimated for five Triplophysa species from the northwest China. A total of 1,598 specimens were collected using set gillnets (mesh size 1.5 cm) and ground bamboo cages in May 2012, and August 2014. This study presents the first references on LWRs for Triplophysa minuta, T. siluroides, and T. tenuis, and two new maximum length records for T. yarkandensis and T. strauchii. Statistical length–weight relationships for all five species were highly significant (p .915.
      PubDate: 2017-07-21T00:25:38.576082-05:
      DOI: 10.1111/jai.13432
       
  • Length‐weight relationships of three indigenous fishes collected from
           Ranganadi River of Lakhimpur district, Assam, India
    • Authors: G. Kaushik; N. K. Sharma, Md. Y. Hossain, S. Bordoloi
      First page: 1237
      Abstract: Length‐weight relationships (LWR) were estimated for three species of fishes, namely Amblyceps arunchalensis, Nath & Dey, 1989, Botia rostrata Günther, 1868, and Esomus danrica (Hamilton, 1822) inhabiting the Ranganadi river in Lakhimpur district of Assam, India. A total of 400 specimens (A. arunchalensis – 33, B. rostrata‐ 53, and Esomus danrica – 314) were collected during irregular intervals between January 2013 and December 2015 using a cast net of 2–10 mm mesh sizes and 2–2.5 m length. The length–weight parameter b ranged from a minimum of 2.95 for E. danrica to a maximum of 3.14 for B. rostrata, with regression coefficients (r2) ranging from0.966 to .993. Prior to this study, the LWRs for B. rostrata E. danrica and A. arunchalensis were unknown. A new maximum length is reported for A. arunchalensis.
      PubDate: 2017-07-21T00:25:24.301773-05:
      DOI: 10.1111/jai.13438
       
  • Length–weight relationships of seven fish species from the Yuan
           River, China
    • Authors: W. Xiong; J. Zhu, L. Jin, J. Q. Zhang
      First page: 1240
      Abstract: Length–weight relationships were determined for seven fish species (Culter oxycephaloides Kreyenberg & Pappenheim, 1908; Pseudobagrus tenuis Günther, 1873; Saurogobio dumerili Bleeker, 1871; Distoechodon tumirostris Peters, 1881; Pseudolaubuca engraulis Nichols, 1925; Liobagrus marginatoides Wu, 1930; and Parabotia bimaculata Chen, 1980) inhabiting the Yuan River, central China. Fishes were collected using gillnets and electroshock fishing techniques quarterly from January 2008 to December 2010. This study is first report the length–weight relationships for this seven fish species.
      PubDate: 2017-08-01T01:20:38.549241-05:
      DOI: 10.1111/jai.13439
       
  • Length–weight relationships of Garra birostris Nebeshwar & Vishwanath,
           2013, Garra annandalei (Hora, 1921), Johnius coitor (Hamilton, 1822) and
           Raiamas bola (Hamilton, 1822) from the Brahmaputra River basin, Northeast
           India
    • Authors: Sudem Basumatary; Fariha Jabeen, Abhinit Dey, Hrishikesh Choudhury, Bandita Talukdar, Himangshu Kumar Kalita, Dandadhar Sarma
      First page: 1242
      Abstract: Length–weight relationships (LWRs) for one percoid (Johnius coitor) and three cyprinid (Garra birostris, Garra annandalei and Raiamas bola) fish species from the Brahmaputra River basin in Assam, Northeast India, was studied on a monthly basis from November 2015 to December 2016, using fishing gears namely, cast nets (9′, 1/2″) and gillnets (30 × 0.9 m). No previous record is available on LWR data for three of these species.
      PubDate: 2017-08-04T01:56:11.278954-05:
      DOI: 10.1111/jai.13440
       
  • Length–weight relationships of six fish species from Tapajós River,
           Eastern Amazon, Brazil
    • Authors: D. T. F. Hashiguti; T. O. Begot, B. S. Prudente, T. M. S. Freitas, L. F. A. Montag
      First page: 1244
      Abstract: The present study reports the length–weight relationships of six fish species from the Tapajós River: Curimata inornata, Geophagus altifrons, G. neambi, Pachyurus junki, Pseudoloricaria laeviuscula and Pristobrycon striolatus. No previous LWR information was available for these species in the FishBase database. Coefficients for the parameter b varied from 2.83 to 3.56.
      PubDate: 2017-08-04T01:57:00.780191-05:
      DOI: 10.1111/jai.13453
       
  • Length‐weight relationship of Thryssa malabarica (Bloch, 1795) and
           Thryssa dayi Wongratana, 1983 from Kerala, southwest coast of India
    • Authors: S. K. Roul; T. B. Retheesh, D. Prakasan, E. M. Abdussamad, P. Rohit
      First page: 1247
      Abstract: The present study reports the length‐weight relationships (LWRs) of two clupeoid fish species, Thryssa malabarica (Bloch, 1795) and Thryssa dayi Wongratana, 1983 from Kerala waters, southwest coast of India during the period October 2015 to September 2016. Altogether 88 specimens of T. malabarica and 97 T. dayi were collected on weekly basis from gill nets (mesh size, 2.6–5.0 cm) and ring seines (mesh size, 0.8–2.6 cm) during the period. The value of parameter b in the equation of LWRs was estimated as 3.237 and 3.248 for T. malabarica and T. dayi respectively.
      PubDate: 2017-08-01T01:20:48.246107-05:
      DOI: 10.1111/jai.13441
       
  • Length‐weight relationships of three fish species collected by
           recreational fishing in the northern coast of Yucatan Peninsula, Mexico
    • Authors: G. Poot-López; R. Díaz-Gamboa, C. González-Salas, S. Guillén-Hernández
      First page: 1249
      Abstract: Length‐weight relationship (LWR) was estimated for three fish species from the northern coast of Yucatan peninsula in the Gulf of Mexico. All specimens were monthly collected from September 2015 to October 2016 by recreational fishing (handlining). A total of 408 individuals (15 Calamus campechanus, 9 Opsanus beta and 384 Sphoeroides nephelus) were sampled and analyzed. Information regarding LWR data for one of these species were not yet available in FishBase database, two of them have limited data and a new record of maximum length is presented.
      PubDate: 2017-08-14T00:35:20.142717-05:
      DOI: 10.1111/jai.13442
       
  • Length–weight relationships of fishes from the estuary of the Macaé
           River, Southeastern Brazil
    • Authors: P. A. Catelani; A. B. Bauer, A. C. Petry
      First page: 1251
      Abstract: The present study provides the length‐weight relationship (LWR) for eight species from the estuarine stretch of the Macaé River, Rio de Janeiro State, Brazil. Data were obtained quarterly between June 2011 and March 2012. These LWRs are the first records for six species and present new maximum values of total length for three ones.
      PubDate: 2017-08-14T00:36:06.452179-05:
      DOI: 10.1111/jai.13443
       
  • Length‐weight relationships for freshwater fish species from humid
           forest enclaves at the Brazilian semiarid
    • Authors: R. C. Gurgel-Lourenço; C. A. S. Rodrigues-Filho, L. A. V. Bezerra, D. S. Garcez, J. I. Sánchez-Botero
      First page: 1254
      Abstract: We report the length‐weight relationships (LWR) for 11 fish species inhabiting headwater streams in the Araripe and Ibiapaba plateaus, Brazilian semiarid. Values of r2, a and b ranged respectively from .953 to .998, 0.010 to 0.043 and 2.81 to 3.69. Our reports on LWR are pioneer in humid forest enclaves at the Caatinga biome. Such enclaves of forest can be a checkpoint to climate change, but are under strong human pressure and remain under low investigation.
      PubDate: 2017-08-04T01:56:28.422724-05:
      DOI: 10.1111/jai.13444
       
  • Length‐weight relationship of two mudskippers (Gobiidae: Oxudercinae)
           Oxuderces dentatus (Eydoux & Souleyet, 1850) and Scartelaos histophorus
           (Valenciennes, 1837) from Dhamara estuary, Odhisa, India
    • Authors: G. Mahadevan; V. Ravi, P. Murugesan
      First page: 1258
      Abstract: Oxuderces dentatus and Scartelaos histophorus species were collected seasonally from the Dhamara estuary (Odhisa, India) using scoop nets, cast nets as well as by hand for a period of 1 year (January 2015–December 2015). Length–weight relationships were estimated. Total lengths (TL) for O. dentatus ranged from 42 to 80 mm, and from 58 to 122 mm for S. histophorus. Similarly, total weights of O. dentatus and S. histophorus ranged from 2.5–10.7 g to 7.7–26.5 g, respectively. The ‘b’ values estimated for O. dentatus (2.718) and S. histophorus (2.689) were below 3. The condition factors of O. dentatus and S. histophorus were minimum in summer and maximum post‐monsoon.
      PubDate: 2017-08-04T01:57:12.384151-05:
      DOI: 10.1111/jai.13455
       
  • Length–weight relationships of three catfish species from a tributary of
           the Dhaleshwari River, Bangladesh
    • Authors: M. A. Hanif; M. A. B. Siddik, M. R. Chaklader, H. D. Pham, R. Kleindienst
      First page: 1261
      Abstract: The present ichthyological report describes the length‐weight relationships (LWRs) of three catfish species (Eutropiichthys murius, Nangra nangra and Gagata viridescens) belonging to two families from the Kaliganga River, a tributary of the Dhaleshwari River, Bangladesh. The analyses included 306 specimens collected monthly from fishermen's catches during October 2015 to April 2016. Ranges of regression parameters a and b of the three species were within 0.0058–0.0099 and 2.900–3.142, respectively with highly correlated coefficients of determination (r2 > .995; p 
      PubDate: 2017-08-01T01:21:57.115523-05:
      DOI: 10.1111/jai.13448
       
  • Length‐weight relationships of four freshwater fish species from the
           coastal drainage system in Peru
    • Authors: D. Faustino-Fuster; J. Chuctaya, R. Quispe, J. Espino
      First page: 1263
      Abstract: The morphometric relationships of three native and one exotic freshwater fish species from the Lower San Juan and Lower Pisco River basins, central Coast of Peru, are presented. Specimens were collected in May and November 2010 using seine nets and electrofishing. Length‐Weight (LWR) relationships for Andinoacara stalsbergi, Trichomycterus punctulatus, Basilichthys archaeus and Poecilia reticulata are provided for the first time, contributing information towards the effort to conserve freshwater fishes.
      PubDate: 2017-08-01T01:20:51.313954-05:
      DOI: 10.1111/jai.13458
       
  • Length–weight relationship of Rastrelliger brachysoma (Bleeker, 1851)
           and Rastrelliger faughni Matsui, 1967 from the Andaman Islands, India
    • Authors: S. K. Roul; R. R. Kumar, U. Ganga, P. Rohit
      First page: 1266
      Abstract: This study reports the length–weight relationships (LWRs) of Rastrelliger brachysoma (Bleeker, 1851) and Rastrelliger faughni Matsui, 1967 from Andaman Islands, India. Sample sizes for the two fish species were 78 for R. brachysoma and 57 for R. faughni. Fish collected monthly from Junglighat fish landing center. Fish were captured by commercial ring seine units (mesh size ranging from 2 to 4 cm) between February 2016 and March 2017. LWRs were established as TW = 0.0042TL3.332 (r2 = .989) for R. brachysoma and TW = 0.0096TL3.022 (r2 = .980) for R. faughni.
      PubDate: 2017-08-04T01:57:05.366149-05:
      DOI: 10.1111/jai.13469
       
  • Length–weight relationships for three freshwater fish species from the
           Pengxi River (a tributary of the Yangtze River, China)
    • Authors: X. W. J. Chen; Q. G. Zhu, S. Li, M. An
      First page: 1268
      Abstract: This study determined the length–weight relationships of three freshwater fish species [Culter oxycephaloides (Kreyenberg & Pappenheim, 1908), Squalidus argentatus (Sauvage & Dabry de Thiersant, 1874), Rhodeus sinensis (Günther, 1868)] from Pengxi River, a tributariy of Yangtze River of China. Fish were collected during 2016 using drift gill nets (mesh size 1, 2 and 3 cm) and cage net (0.5 cm mesh size). For Culter oxycephaloides had no previous length–weight estimates were reported in the science literature. For Squalidus argentatus the present estimate includes a new maximum total length while for Rhodeus sinensis our study confirms the only existing LWR estimate quite well.
      PubDate: 2017-09-04T03:40:31.596627-05:
      DOI: 10.1111/jai.13470
       
  • Length–weight and length–length relationships of 26 fish species from
           the Yiluo River, a tributary of the Yellow River, China
    • Authors: X. C. Qin; P. C. Lin, S. Z. Li, X. G. Wang, Z. Guo, H. Z. Liu
      First page: 1270
      Abstract: From February to October 2016, a total of 9,754 fish specimens were collected from the Yiluo River, a tributary of the Yellow River, China's second longest river. Based on these samples, length–weight relationships (LWRs) and length–length relationships (LLRs) were estimated for 26 species. Among these data, LWRs for 1 species, LLRs for 11 species, and maximum total lengths for six species were not previously recorded in FishBase. The a values of the LWRs varied between 0.0019 and 0.0116, and b values from 2.805 to 3.883. All regressions for LWRs and LLRs were highly significant (p 
      PubDate: 2017-08-04T01:57:16.397277-05:
      DOI: 10.1111/jai.13472
       
  • Length–weight relationships of 11 fish species from the Nuoshuihe
           Precious Water Animal National Nature Reserve, southwestern China
    • Authors: K. Liu; X. D. Wang, B. Wu, S. Li, Y. Lei, Z. B. Song
      First page: 1274
      Abstract: Length–weight relationships (LWRs) are presented for 11 species [Acrossocheilus monticola (Günther, 1888), Squalidus wolterstorffi (Regan, 1908), Sinibrama taeniatus (Nichols, 1941), Gnathopogon herzensteini (Günther, 1896), Rhynchocypris oxycephalus (Sauvage & Dabry de Thiersant, 1874), Rhodeus lighti (Wu, 1931), Platysmacheilus nudiventris Luo, Le & Chen, 1977, Hemibagrus macropterus Bleeker, 1870, Glyptothorax fokiensis (Rendahl, 1925), Liobagrus marginatoides (Wu, 1930), Sinogastromyzon szechuanensis Fang, 1930] from the Nuoshuihe Precious Water Animal National Nature Reserve in southwestern China. Samples were collected bimonthly with trap‐nets (mesh size: 5 × 5 mm; height 0.3 m; width 0.4 m; length 7 m) from 2015 to 2016.
      PubDate: 2017-08-04T01:57:24.902496-05:
      DOI: 10.1111/jai.13473
       
  • Length–weight and length–length relationships of two goby species,
           Neogobius caspius (Eichwald, 1831) and Proterorhinus nasalis (De Filippi,
           1863) from the southern Caspian Sea
    • Authors: E. Mahdipour; M. S. Alavi-Yeganeh, A. Heidari
      First page: 1277
      Abstract: The present study provides the length–weight (LW) and length–length (LL) relationships for two goby species, Neogobius caspius and Proterorhinus nasalis, which were captured in the southern Caspian Sea. Total length (TL) and standard length (SL) were determined as well as weight. Specimens were collected monthly from September 2014 to August 2015 by beach seine (mesh size 10 mm). The LW parameter b for these species was 3.17 and 2.99, respectively, with a high coefficient of determination (r2 > .95). All LLRs were highly correlated (r2 > .97). Both species had no previous LWR and LLR estimates in FishBase.
      PubDate: 2017-09-18T01:25:49.360052-05:
      DOI: 10.1111/jai.13474
       
  • Length–weight relationships of Hara hara (Hamilton, 1822), Pangio pangia
           (Hamilton, 1822) and Setipinna brevifilis (Valenciennes, 1848) from the
           lower Brahmaputra River, Northeast India
    • Authors: S. Basumatary; H. Choudhury, D. Sarma
      First page: 1279
      Abstract: The present study describes the length–weight relationships (LWRs) for Hara hara, Pangio pangia and Setipinna brevifilis from the lower Brahmaputra River in Assam, Northeast India, collected from June 2016 to May 2017, using fishing gears namely cast nets (9′, 1 ⁄ 2″) and gillnets (30 × 0.9 m). No previous data have ever been recorded on LWR for these three species.
      PubDate: 2017-09-18T01:25:26.708814-05:
      DOI: 10.1111/jai.13481
       
  • Length‐weight relationships of seven fish species from Jequitinhonha
           River basin, southeastern Brazil
    • Authors: G. N. Salvador; T. C. Pessali, A. F. A. Andrade, T. M. S. Freitas
      First page: 1281
      Abstract: The present study established the length‐weight relationships (LWR) for seven fish species from Jequitinhonha River basin, a Brazilian coastal drainage, collected with gillnets (3 to 16 cm) between 2011 and 2016. For the LWR, standard length and total weight were used. The allometric coefficient b varied from 2.66 to 3.26. These results provide biological data for a region of extreme biogeographical importance that is suffering serious environmental disturbances.
      PubDate: 2017-09-28T01:20:20.047948-05:
      DOI: 10.1111/jai.13502
       
  • Length–weight and length–length relationship of Thryssa purava
           (Hamilton, 1822), Thryssa polybranchialis Wongratana, 1983 and Thryssa
           mystax (Bloch & Schneider, 1801) from Chilika lagoon, India
    • Authors: S. K. Karna
      First page: 1284
      Abstract: Current study provides basic information on Length–weight relationship (LWR) and length‐length relationship (LLR) of three fish species of genus Thryssa (Clupeiformes: Engraulidae) i.e., Thryssa purava (Hamilton, 1822), Thryssa polybranchialis Wongratana, 1983 and Thryssa mystax (Bloch & Schneider, 1801) from Chilika Lagoon, India. Samples were collected during the monsoon (July) and post‐monsoon (November) seasons in 2016 and during the pre‐monsoon season (May) in 2017, using screen barrier nets (mesh size 8–18 mm) and gill nets (mesh size 14 and 16 mm). The b values were determined from LWRs as 3.026 for Thryssa purava, 3.326 for Thryssa polybranchialis and 3.081 for Thryssa mystax.
      PubDate: 2017-09-29T23:25:25.176353-05:
      DOI: 10.1111/jai.13503
       
  • Length–weight relationships of three fish species from Piediluco
           Lake, Italy
    • Authors: A. Carosi; L. Ghetti, M. Lorenzoni
      First page: 1287
      Abstract: Length–weight relationships for Leucos aula, Scardinius hesperidicus, and Squalius squalus from the Piediluco Lake were provided. Data were collected by means of electrofishing, gill-nets (mesh sizes varying from 5 to 55 mm) and fyke-nets (mesh size 16 mm, total length 8 m, mouth width 1.5 m). The monitoring campaigns were carried out seasonally in the years 2004 and 2011, and in autumn 2012. A total of 5,198 specimens were analyzed. For all the species the value of b ranged between 3.163 for Leucos aula and 3.297 for S. hesperidicus. For L. aula a new maximum total length was also reported.
      PubDate: 2017-08-20T01:11:29.451809-05:
      DOI: 10.1111/jai.13482
       
  • Length‐weight relationship of two Ambassid fish species, Parambassis
           dayi (Bleeker, 1874) and Parambassis thomassi (Day, 1870) from River
           Pamba, Southern Western Ghats, India
    • Authors: C. R. Renjithkumar; K. Roshni, B. M. Kurup
      First page: 1290
      Abstract: The present study provides the length‐weight relationships (LWRs) of two Ambassid fish species, Parambassis dayi (Bleeker, 1874) and Parambassis thomassi (Day, 1870) from River Pamba in Southern Western Ghats, India. Fishes were collected on a monthly basis between April 2014 to March 2015 using gill nets (1.0–3.0 cm), cast nets (1.0–2.0 cm) and seine nets (1.0 cm). The b values in the LWRs were estimated as 3.01 for P. dayi and 3.14 for P. thomassi. No previous information is available on LWRs for these two species in FishBase.
      PubDate: 2017-09-27T01:40:30.737213-05:
      DOI: 10.1111/jai.13504
       
  • Length–weight relationships for four fish species from the Muling
           River, Heilongjiang, China
    • Authors: X. Sun; M. H. Liu, C. X. Ma, H. B. Wang, X. M. Xu, Z. L. Yin, F. Chen, H. X. Yu
      First page: 1292
      Abstract: In this study, fish samples were collected by electric fishing gear (2,000 W, 650 V) in May 2015. The length–weight relationships for four fish species from the Muling River in China belonging to two families and four genera were analyzed. A total of 115 specimens were used to estimate the relationship parameters.
      PubDate: 2017-09-27T01:40:21.774547-05:
      DOI: 10.1111/jai.13486
       
  • Length‐weight relationships of Badis dibruensis Geetakumari and
           Vishwanath, 2010 (Badidae) and Lepidocephalichthys arunachalensis (Datta
           and Barman, 1984) (Cobitidae) from Subansiri River (Brahmaputra basin),
           Northeast India
    • Authors: H. Choudhury; S. Mili, S. Basumatary, A. Mazumder, D. Sarma
      First page: 1294
      Abstract: Length–weight relationships (LWRs) for Badis dibruensis and Lepidocephalichthys arunachalensis, collected from the lower Subansiri River (Brahmaputra basin) in Assam, India from March 2016 to April 2017 using fishing gears namely cast nets (2.5 m, 1 m; 10–15 mm mesh size) and gillnets (30 × 0.9 m; 5–10 mm mesh size), are presented based on seasonal collections. The b values in the LWRs were determined as 2.56 for B. dibruensis and 3.28 for L. arunachalensis.
      PubDate: 2017-09-27T01:40:18.445994-05:
      DOI: 10.1111/jai.13505
       
  • Length–weight and length–length relationships of four fish species
           from the middle reaches of the Minjiang River, southwest China
    • Authors: Z. Zhang; H. Ding, W. Wang, F. Chen, D. Huang, Z. Yang
      First page: 1296
      Abstract: Length–weight (LWR) and length–length (LLR) relationships are reported for Glyptothorax fokiensis (Rendahl, 1925), Microphysogobio kachekensis (Oshima, 1926), Pseudobagrus brevicaudatus (Wu, 1930), and Sinibrama taeniatus (Nichols, 1941) from the middle reaches of the Minjiang River and its tributaries, Sichuan Province, in southwest China. A total of 675 specimens were obtained between 2013 and 2016 using various types of fishing gear and electroshock fishing techniques. Standard length and total length for each individual were measured by digital slide caliper and each body weight was taken by digital balance. The b-values for LWRs varied from 2.617 to 3.249 (r2 > .954), and the LLRs were highly correlated (r2 > .983; p 
      PubDate: 2017-08-20T01:11:25.490504-05:
      DOI: 10.1111/jai.13483
       
  • Length–weight relationships of four fish species from the Nujiang
           River, China
    • Authors: L. Pan; X. W. Cheng, J. Xu, T. Yang, P. P. Li, Z. X. Wang, D. G. Shao
      First page: 1299
      Abstract: Length–weight relationships (LWRs) were determined for four fish species (Akrokolioplax bicornis [Wu, 1977], Barbodes wynaadensis [Day, 1873], Glyptothorax cavia [Hamilton, 1822] and Placocheilus cryptonemus [Cui & Li, 1984]) from the Nujiang River, China. Samples were collected from March 2008 to August 2016 (frequency of sampling during the study period: once per year), using various fishing gears (set nets [mesh: 1.5 cm × 2.0 cm], fish cages [0.5 cm mesh], hook, drift gill nets [mesh: 1.0 cm × 2.0 cm × 3.0 cm] and electro fishing). Two new maximum SL were recorded for B. wynaadensis and P. cryptonemus.
      PubDate: 2017-08-20T01:12:45.035589-05:
      DOI: 10.1111/jai.13476
       
  • Length-weight and length-length relationships of Balitora brucei Gray,
           1830 and Psilorhynchus balitora (Hamilton, 1822) from the Ranganadi river
           of Assam, India
    • Authors: G. Kaushik; S. Bordoloi
      First page: 1301
      Abstract: The study describes length-weight relationships (LWRs) and length-length relationships (LLRs) for two species of fishes, namely Balitora brucei Gray, 1830 and Psilorhynchus balitora (Hamilton, 1822) collected from Ranganadi river in Lakhimpur district of Assam, India for which no LWRs and LLRs are available. While sampling monthly between April 2012 and July 2016, a total of 987 specimens were collected (B. brucei = 427, and P. balitora = 560). Cast nets were used (2 - 10 mm mesh sizes; 2–2.5 m length). The values of the parameter slope (b) in the LWR were determined as 3.194 (male = 3.047 and female = 3.224) for B. brucei and 3.490 (male = 3.480 and female = 3.502) for P. balitora. Present investigation reports new maximum total length for both the fishes.
      PubDate: 2017-08-14T00:36:33.564564-05:
      DOI: 10.1111/jai.13477
       
  • Length–weight relationships of five fish species associated with krill
           fishery in the Atlantic sector of the Southern Ocean
    • Authors: Lian Wei; Guo-Ping Zhu, Qing-Yuan Yang
      First page: 1303
      Abstract: Length–weight relationships (LWRs) of five fish species commonly associated with Antarctic krill fishery, were determined. Samples were collected with Chinese krill trawler (codend mesh size 2 cm) in the Atlantic sector of the Southern Ocean from January to August 2016. Data on LWRs and the relationships between weight and standard length as well as weight and total length of those species were updated for the database of FishBase. Those data on fish species derived from Antarctic krill fishery will be very helpful in understanding the interaction between krill fishery and the associated fish community.
      PubDate: 2017-09-13T05:55:45.275605-05:
      DOI: 10.1111/jai.13478
       
  • Length–weight relationships of three fish species of coral reef fishes
           from the northeastern of the Persian Gulf
    • Authors: S. Hazraty-Kari; P. Tavakoli-Kolour
      First page: 1306
      Abstract: The investigation presents length–weight relationships for three coral reef fish species: Cephalopholis formosa (Shaw, 1812); Chaetodon nigropunctatus Sauvage, 1880; and Pomacanthus maculosus (Forsskål, 1775). The specimens were captured between April to August 2015 by spear-gun and wire trap (mesh size: 35 mm) in coral reefs of the northeastern areas of the Persian Gulf.
      PubDate: 2017-08-20T01:11:28.241386-05:
      DOI: 10.1111/jai.13484
       
  • Length–weight relationships of three fish species from Kerala waters,
           south-west coast of India
    • Authors: S. K. Roul; A. R. Akhil, T. B. Retheesh, D. Prakasan, U. Ganga, E. M. Abdussamad, P. Rohit
      First page: 1308
      Abstract: Length–weight relationships (LWRs) of three fish species: Scomberomorus commerson, Alepes vari, and A. kleinii were estimated from Kerala waters, south-west coast of India. Fish were captured between June 2016 and June 2017 by various gears such as ring seine (8–26 mm mesh size), trawl (30–40 mm cod end mesh size), hook and line (hook number VI–XII), smaller mesh sized drift gill net (26–90 mm) and larger one (120–170 mm) for bigger size fishes. Fish were collected on weekly basis from Cochin Fisheries Harbour (Lat. 09°56′327″N, Long. 76°15′764″E), Munambam Fisheries Harbour (Lat. 10°10′965″N, Long. 76°10′258″E), Kalamukku (Lat. 09°59′924″N, Long. 76°14′564″E) and Chellanam (Lat. 09°47′950″N, Long. 76°16′551″E). All LWRs were significant with r2 values ranged from 0.944 to 0.996 and b values ranged from 2.722 to 3.021 (p 
      PubDate: 2017-08-20T01:11:27.120649-05:
      DOI: 10.1111/jai.13485
       
  • Length–weight relationships of two schizothoracinae fish species from
           the Maquan River, the upper reaches of the Yarlung Zangbo River, Tibet,
           China
    • Authors: C. Zhang; H. P. Liu, Z. B. Mou, B. Ma, C. W. Zhou, L. Lei, B. H. Li
      First page: 1310
      Abstract: Length‐weight relationships (LWRs) were determined for two endemic fish species from the Maquan River, the upper of the Yarlung Zangbo River: (Ptychobarbus dipogon Regan, 1905, Schizothorax waltoni Regan, 1905). All the specimens were collected between May and September of 2014. Length–weight relationships for these two fish species were determined for the first time, and new maximum body weights were recorded for these two species. These results will be useful for fishery research, management and conservation of the Yarlung Zangbo River.
      PubDate: 2017-09-10T23:41:57.77156-05:0
      DOI: 10.1111/jai.13487
       
  • Length-weight relationships for three zoarcoid fish species from the
           coastal waters of the northern Yellow Sea, China
    • Authors: G.-J. Yang; L. Song, Z.-X. Wu
      First page: 1312
      Abstract: Length–weight relationships (LWRs) were determined for three zoarcoid fish species: Zoarces elongatus Kner, 1868, Pholis fangi (Wang & Wang, 1935) and Chirolophis japonicus Herzenstein, 1890. Samples were collected from the coastal waters of the northern Yellow Sea (near Dalian City) using bottom trawl nets (20 mm stretched mesh size in the cod-end) for Zoarces elongatus and Pholis fangi and set gill nets (mesh size 15.6 mm) for Chirolophis japonicus. Samples were taken from mid-March to early April 2017. Parameter b values in the fitted LWRs were 3.119, 3.440 and 3.423 for Z. elongatus, P. fangi and C. japonicus, respectively.
      PubDate: 2017-08-28T00:45:22.484285-05:
      DOI: 10.1111/jai.13489
       
  • Length–weight relationships for seven fish species from the Nandujiang
           River in Hainan Island, China
    • Authors: Y.-F. Li; S.-L. Zhu, F.-C. Chen, J.-P. Yang, X.-H. Li
      First page: 1314
      Abstract: Length–weight relationships (LWRs) were determined for seven fish species collected during 2014 and 2015 between January and July each year from Nandujiang River. The study used drift gillnet with 4 cm mesh (100 m long × 1.2 m high) as well as electrofishing. The parameter “b” of the LWR equations varied between 2.963 to 3.171 for the species studied.
      PubDate: 2017-09-18T01:25:27.938706-05:
      DOI: 10.1111/jai.13501
       
 
 
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