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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  [1577 journals]
  • 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
      PubDate: 2017-07-25T23:36:46.826187-05:
      DOI: 10.1111/jai.13456
       
  • 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
      PubDate: 2017-07-25T23:36:13.290482-05:
      DOI: 10.1111/jai.13436
       
  • 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
      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
      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 relationship of six fish species from Geum, Nakdong and
           Yeongsan rivers, South Korea
    • Authors: Md. Mamun; Y.-J. Lee, K.-G. An
      Abstract: Length-weight relations (LWR) of six fish species from Geum, Nakdong and Yeongsan rivers in South Korea was estimated. A total of 5,152 specimens were measured and weighed. The linear relationship of total length and total weight were highly correlated for all species. No previous information on LWRs on Rhinogobius brunneus species were found in Fishbase.
      PubDate: 2017-07-14T06:19:39.405405-05:
      DOI: 10.1111/jai.13431
       
  • Length–weight and length–length relationships of five fish species
           from the Dadu River and its tributaries, southwest China
    • Authors: Zhiming Zhang; Wenjun Wang, Feng Chen, Zhengqing Yang
      Abstract: Length-weight (LWRs) and length–length (LLRs) relationships are reported for five fish species belonging to two families and five genera from the Dadu River and its tributaries, southwest China. In total, 605 specimens were collected by electrofishing and gillnets (mesh size ranging from 1.5 to 3.5 cm) in May and October 2013, May and October 2014, May and November 2015, and April and October 2016. The b-values for LWRs varied from 2.571 to 2.952 (r2 > .915). The results further indicated that the LLRs were highly correlated (r2 > .978; p 
      PubDate: 2017-07-14T02:55:19.360648-05:
      DOI: 10.1111/jai.13435
       
  • Collapse of Lake Whitefish Coregonus clupeaformis (Mitchill, 1818) species
           pair in Como Lake, Ontario
    • Authors: S. M. Reid; M. Parna, J. D. Reist
      Abstract: Lake Whitefish (Coregonus clupeaformis) species pairs exist in a small number of northern temperate lakes in North America. Sympatric populations of dwarf and normal-sized whitefish represent a continuum of morphological and genetic divergence among these lakes. In this study, we used morphological and age data to assess the status of the Lake Whitefish species pair in Como Lake, Ontario (Canada). Whitefish were collected with gill-nets from spawning shoals during the fall of 2012 and 2014 and compared with archived (circa 1989) dwarf and normal-sized specimens. Our study indicates that the two previously collected forms have been replaced by a single form with a different morphology and age structure. In comparison to archived specimens, contemporary Lake Whitefish were larger, deeper-bodied and older; with more gill rakers, lateral line scales, smaller eyes and a wider interorbital width. We hypothesize that the recent invasion of Como Lake by Spiny Waterflea (Bythotrephes longimanus) has affected whitefish growth rates and changed the ecosystem conditions that previously maintained the species pair.
      PubDate: 2017-07-08T02:05:26.051064-05:
      DOI: 10.1111/jai.13429
       
  • Reproductive biology of Pethia ticto (Cyprinidae) from the Gorai River (SW
           Bangladesh)
    • Authors: M. Y. Hossain; M. A. Hossen, M. S. Islam, S. Jasmine, F. Nawer, M. M. Rahman
      Abstract: Some aspects of reproductive biology of Pethia ticto (Hamilton, 1822) from the Gorai River of southwestern (SW) Bangladesh were investigated by regular monthly samples for a period of one year during July 2010 to June 2011. A sum of 1200 specimens (male = 454 and female = 746) were collected using cast net, lift net and conical trap. Total length (TL) and Body weight (BW) were measured with slide caliper and digital balance, respectively for each individual. Based on gonadosomatic index (GSI), modified gonadosomatic index (MGSI) and Dobriyal index (DI) first sexual maturity was 4.30 cm TL for male and 4.80 cm TL for female. Also, on the basis of higher values of GSI, MGSI and DI spawning season was ranged from April to September for P. ticto in the Gorai River ecosystem. The fecundity was ranged from 2230–8450 with a mean value of 4779 ± 1578. In addition, there was a significant relationship between total length and fecundity (r2 = .931, p 
      PubDate: 2017-07-07T01:05:44.747619-05:
      DOI: 10.1111/jai.13427
       
  • Nonlethal sampling for stable isotope analysis of juvenile Chinese
           sturgeon (Acipenser sinensis): Comparing δ13C and δ15N signatures in
           muscle and fin tissues
    • Authors: S. K. Wang; C. Xu, Y. Wang, G. Yang, T. T. Zhang, F. Zhao, P. Zhuang
      Abstract: We compared δ13C and δ15N values of muscle with fin from juvenile Chinese sturgeon (Acipenser sinensis), to evaluate the feasibility of using nonlethal (fin) as an alternative to lethal (muscle) sampling. Size and lipid effect on the relationship between fin and muscle were also investigated. Dorsal muscle (DM) and fin clip (FC) were collected from A. sinensis with different body length (120–373 mm) in the Yangtze Estuary for isotope analysis. The result showed that (1) muscle isotope values could estimated by the values of fin, from either use the regression model (δ13CDM = 0.939 × FC − 2.577; δ15NDM = 0.737 × FC + 4.638) or constants factors (δ13CDM = δ13CFC − 1.27; δ15NDM = δ15NFC + 0.59); (2) no size-based relationships with δ13C and δ15N from either fin or muscle; (3) lipid extraction significantly improving the fin and muscle regression model fit for both δ13C and δ15N values. Therefore, this study support the use of nonlethal fin tissues for isotope analysis of juvenile A. sinensis, and will allow trophic studies to avoid the effect of lipid accumulation from muscle.
      PubDate: 2017-07-05T03:25:54.606672-05:
      DOI: 10.1111/jai.13433
       
  • Identification of a sex-specific molecular marker in Salminus brasiliensis
           (Characiformes) based on SCAR marker
    • Authors: L. De Rosa; V. P. Cruz, E. A. Serrano, N. J. Mendes, A. P. Wasko, J. A. Senhorini, B. G. Pardo, P. Martínez, C. Oliveira, F. Foresti
      Abstract: Salminus brasiliensis, a characin regionally named ‘dourado’ (meaning goldfish), is the biggest characid fish, this species is cited in a list of fishes that are vulnerable. The goal of the present work was to try to identify, through AFLP technique to convert them into single locus markers (SCARs), in order to improve the sex identification in S. brasiliensis. Between possible sex-specific AFLP markers in this study, one male-specific were isolated (Les1) and converted into a SCAR marker. Les1 marker was confirmed sex-specific in all samples tested. A sex-specific DNA marker applicable to fish would be very useful for elucidating sex determination mechanism in fish.
      PubDate: 2017-07-05T03:25:20.982213-05:
      DOI: 10.1111/jai.13430
       
  • Mass-marking of farmed European eels (Anguilla anguilla (Linnaeus, 1758))
           with alizarin red S
    • Authors: B. Kullmann; R. Neukamm, R. Thiel
      Abstract: The Working Group on Eel of the International Council for the Exploration of the Sea (ICES) regularly reports that a significant amount of stocked eels in Europe was pre-grown in aquaculture farms prior to stocking—so called “farmed eels.” The ICES advices chemical marking of stocked recruits to ensure their traceability throughout all life stages. To date, however, there was a lack of knowledge concerning the most suitable chemical substance and its application on farmed eels. The aim of this study was to fill this gap by presenting successful attempts of marking those eels with alizarin red S (ARS). An ARS concentration of 150 mg L−1 buffered with 150 mg L−1 Tris(hydroxymethyl)aminomethane applied as an immersion bath over 9 h was sufficient to mark a total of 3572 kg of farmed eels (6.5–8.0 g mean body weight). The marking success was 100% on otoliths and highest stocking density of up to 67.1 kg m−3 (corresponding 54.0 kg m−2) turned out to have no effect on mortality which was consistently below 1%.
      PubDate: 2017-07-03T03:45:26.891255-05:
      DOI: 10.1111/jai.13424
       
  • Length–weight relationships of four marine fish species caught in
           the South China Sea
    • Authors: Z.-L. Li; G. Hou, Y.-R. Yan, B. Feng, H.-S. Lu
      Abstract: Length–weight relationships are described for four marine teleost fish species caught in the South China Sea. A total of 625 individuals were collected from April to August 2007 and November 2012 using a bottom trawl (mesh size, 3.9 cm) and longline fishing. The values of parameters a and b ranged from 0.004612 to 0.02137 and 3.019 to 3.371, respectively. The high r2 values (all >.950) indicate that these relationships are robust and will be appropriate for use in fisheries management of these species.
      PubDate: 2017-07-02T23:45:49.033745-05:
      DOI: 10.1111/jai.13399
       
  • Silver eel, Anguilla anguilla (Linnaeus, 1758), migration patterns in
           lowland rivers and lagoons in the North-Eastern region of their
           distribution range
    • Authors: J. Dainys; S. Stakėnas, H. Gorfine, L. Ložys
      Abstract: Escapement success and migration patterns of silver eels Anguilla anguilla (L.) was studied by acoustic telemetry in three natural free-flowing and one dammed river and in Curonian Lagoon in Lithuania. Mean downstream migration speed and escapement success were almost the same in the shorter 210 km dammed river (52%, 13.6 km/day) and the considerably longer 300–480 km free-flowing rivers (53%, 10.7 km/day). Despite the similarity between migration speed in the Curonian Lagoon (14.6 km/day) to that in rivers, migration success was significantly higher (71%) in the Lagoon. Although a majority of silver eels in Lithuania start migrating downstream in spring, the peak of eel migration into the Baltic Sea was observed during late fall. Overall migration success in the rivers and the Lagoon was 35%. Relatively low escapement may have negative consequences on the success on eel stock restoration and must be addressed when strategically planning for the production of spawners.
      PubDate: 2017-07-02T23:45:47.535788-05:
      DOI: 10.1111/jai.13426
       
  • Identification of larval fish in mangrove areas of Peninsular Malaysia
           using morphology and DNA barcoding methods
    • Authors: I. A. Azmir; Y. Esa, S. M. N. Amin, I. S. Md Yasin, F. Z. Md Yusof
      Abstract: The identification of larval fish has been an important morphological issue in marine biology due to the dramatic transformations that most species undergo from early larval stages to adulthood. Insufficient morphological diagnostic characters in larval fishes made it easy to misidentify them and a difficult process to key to genus and species level. The experiment aims to find out, by applying DNA barcoding, how consistent the morphological identifications can be among larval fish. Larval fish were mainly collected using plankton nets around mangrove areas in Pendas (Johor), Setiu (Terengganu), Pekan (Pahang) and Matang (Perak) Malaysia between April 2015 and October 2015. A total of 354 samples were morphologically identified, mostly to the family level and a few to the genus level. Larval fish ranged from 1.5 mm to 31 mm of total length, with the most abundant individuals being
      PubDate: 2017-07-02T23:45:30.44912-05:0
      DOI: 10.1111/jai.13425
       
  • Hematological effects of transportation stress on Atlantic sturgeon
           Acipenser oxyrinchus Mitchill L. 1815
    • Authors: A. Pilinkovskij; M. Z. Vosylienė, N. Kazlauskienė, J. Jakubauskaitė
      PubDate: 2017-07-02T23:45:20.171895-05:
      DOI: 10.1111/jai.13402
       
  • Length–weight relationships for seven fish species of the Napo
           River, Upper Amazon, Peru
    • Authors: J. R. Garcia-Ayala; E. M. Brambilla, G. S. David, R. C. Benine, H. Sanchez
      Abstract: Length–weight relationships (LWR) were estimated for seven fish species from the Napo River and its main tributaries, Arabela and Curaray rivers, Amazon basin, Peru. A total of 652 specimens were sampled between 2012 and 2014 using seines and gillnets. This study reports new maximum total length for four species and new LWR and maximum total weight records for three and five species, respectively.
      PubDate: 2017-06-28T23:30:26.013123-05:
      DOI: 10.1111/jai.13428
       
  • Size–weight relationships of batoids captured by artisanal fishery in
           the southern Gulf of California, Mexico
    • Authors: N. R. Ehemann; X. A. Pérez-Palafox, P. Mora-Zamacona, M. I. Burgos-Vázquez, A. F. Navia, P. A. Mejía-Falla, V. H. Cruz-Escalona
      Abstract: This study reports the size–weight relationships (SWR) for nine batoid species that are frequently fished by the artisanal fisheries in the southern Gulf of California. Analysis included a total of 2,012 specimens, caught from October 2013 to July 2016. The slope values (b) oscillated from 2.80 to 3.56. Growth was isometric for five species and positively allometric for four. There were differences in SWR between sexes for three species being in all cases the female greater and heavier than males. This is the first analysis of SWR for the batoid species studied in the Gulf of California.
      PubDate: 2017-06-22T23:36:11.923624-05:
      DOI: 10.1111/jai.13421
       
  • Length–weight and length–length relationships of 16 fish species from
           Amapá, Brazilian Amazon
    • Authors: A. B. Nobile; D. Freitas-Souza, F. P. Lima, L. B. Vieira, B. F. Melo, C. Oliveira
      Abstract: The present study provides length-weight (LWR) and total length-standard length (LLR) relationships for 16 freshwater fish species collected in coastal rivers of the northern Brazilian, state of Amapá in 2015. Fishes were caught in heterogenic environments like ponds, stream and river channel with sieve and trawl. As result, we present novel information of LWR and LLR for 11 and 15 species, respectively. Maximum values (first values or new maximum values) of TL, SL and WT are presented for 14, 12 and 15 species, respectively.
      PubDate: 2017-06-19T23:45:25.867516-05:
      DOI: 10.1111/jai.13423
       
  • Length–weight relationships of five fish species from Carangidae family
           in waters of the northern Persian Gulf, Iran
    • Authors: M. Parsa; B. Rahnama, M. Mahmoudi Khoshdarehgi
      Abstract: This research describes and presents some biological aspects of five fish species from carangidae family including: Alepes djedaba, Ulua mentalis, Alectis indica, Carangoides coeruleopinnatus, and Carangoides bajad in the Iranian waters of the northern Persian Gulf (Hormozgan Province, Iran). Samples were collected from April to September 2016. The fishing gears were gill nets (80, 100, 120 and 145 mm stretched mesh size), bottom and midwater trawls (30, 40 and 75 mm stretched mesh size in cod-end) of local and commercial fishery. The b values of length–weight relationships ranged from 2.512 (95% CL = 0.054) for U. mentalis to 2.953 (95% CL = 0.155) for C. coeruleopinnatus and the correlation coefficient values (r2) were high for all species.
      PubDate: 2017-06-18T23:31:17.231659-05:
      DOI: 10.1111/jai.13422
       
  • Population genetics of wild Siniperca knerii Garman, 1912 in China as
           evaluated by microsatellites
    • Authors: C.-X. Tian; Y.-H. He, X.-F. Liang, W.-J. Guo, L.-F. Sun, L.-Y. Lv, S. He
      Abstract: The Chinese perch Siniperca knerii Garman, 1912 is an endemic perciform freshwater fish species mainly distributed in the Yangtze River and the Pearl River of China. To evaluate their genetic diversity in these rivers, microsatellite markers were used to assess the genetic structure and genetic variability among nine wild populations of S. knerii. In this study, the 12 loci used were polymorphic, with observed heterozygosity (Ho) ranging from 0.4079 to 0.8886 and polymorphism information content (PIC) ranging from 0.4511 to 0.7146. Results showed that six populations from the Yangtze River had a higher genetic diversity than those from the three Pearl River populations. The Bayesian STRUCTURE analysis recovered genetic clusters that matched localities perfectly or the kind of ecology environment with a significant Fst between them. The findings of this research should provide useful information for management and conservation of S. knerii stocks.
      PubDate: 2017-06-18T23:30:39.149333-05:
      DOI: 10.1111/jai.13412
       
  • Length–weight relationship of 12 fish species from the Lhasa River and
           surrounding area in Tibet, China
    • Authors: F. Lin; J. Zhang, L. Q. Fan, S. Q. Li, Q. H. Zhou
      Abstract: Presented are the relationship between standard length (SL) and weight (W) for 12 fish species in Tibet, China, representing three families and six genera from the Lhasa River. All fish samples were collected by either electro-shocker (12 V, 200 Hz), fish cages (mouth opening: 40 × 40 cm2, 5 m), or drift gillnets (3 × 1.5 m; mesh-size: 3 cm to 8 cm) from different areas in the Lhasa River Basin, August and September 2015. Parameter b ranged from 2.88 to 3.29, and all correlation coefficient (r2) values were higher than 0.95. Length–weight relationships (LWRs) for three of the species as well as one maximum length are first reports for FishBase.
      PubDate: 2017-06-18T23:30:21.663563-05:
      DOI: 10.1111/jai.13419
       
  • Length–weight relationships of seven myctophid fishes (Myctophiformes:
           myctophidae) in the South China Sea
    • Authors: Y. E. Jiang; Z. Z. Chen, K. Zhang, J. Zhang, Y. Y. Gong, X. L. Kong, J. T. Fan, Z. J. Lin, Z. Q. Fang
      Abstract: The study included 546 specimens of seven myctophid fish species from the South China Sea (captured during June 2015 by bottom and mid-water trawls). Length-weight relationships (LWRs), W = aLb, were estimated using standard length. The species belong to four genera. The values for the parameter a ranged from 0.006 to 0.022, while the b values ranged from 2.710 to 3.476 (Range of r2 values: .938 to .971). According to FishBase, this study presents the first LWRs for these species, including two maximum standard lengths for Diaphus chrysorhynchus and Notoscopelus resplendens.
      PubDate: 2017-06-18T23:30:19.349249-05:
      DOI: 10.1111/jai.13418
       
  • Geographic variations of the mottled skate, Beringraja pulchra (Liu, 1932)
           (Rajidae) in the Yellow and East seas based on molecular and morphometric
           data
    • Authors: Y.-J. Im; H.-S. Jo, H.-S. Ji, S.-H. Myoung, J.-K. Kim
      Abstract: In order to prove the fisheries-related hypothesis of the presence of two local populations of the mottled skate, Beringraja pulchra in the Yellow Sea (Sensu Jo et al., ), the geographic variations of 90 individuals (in molecule) and 129 individuals (in morphology) were investigated. The skates were collected from the middle Yellow Sea (Daechungdo), southern Yellow Sea (Heuksando), and the middle East Sea (Ulleungdo) using gill nets, bottom trawls and longlines. Comparing 471 base pairs of mitochondrial DNA cytochrome c oxidase subunit I (mtDNA COI) sequences, only three haplotypes (BR1–BR3) were found. The Daechungdo and Heuksando individuals displayed all three haplotypes, whereas the Ulleungdo individuals displayed a single haplotype (BR3). Pairwise fixation indices (FST) showed that the Daechungdo and Heuksando individuals were not genetically distinguishable (with a value of −0.0344), whereas the Ulleungdo individuals were clearly distinct from both the Daechungdo and Heuksando individuals (with values of 0.6875 and 0.6871, respectively). Similar to the molecular result, a canonical discriminant analysis based on seven morphometric characters showed that the Ulleungdo individuals had positive values on the first axis, whereas those from the other two locations had negative values, slightly differentiating the two populations (East Sea population vs Yellow Sea population). This study is the first to identify two populations of mottled skate in the northwest Pacific.
      PubDate: 2017-06-17T18:17:06.937603-05:
      DOI: 10.1111/jai.13408
       
  • Growth, body composition and digestive enzyme responses of Caspian Kutum,
           Rutilus frisii (Kamenskii, 1901), juveniles fed different levels of
           carbohydrates
    • Authors: S. Mohammadzadeh; H. A. Noverian, H. Ouraji, B. Falahatkar
      Abstract: The study evaluated the effects of dietary carbohydrate levels on growth performance and digestive enzyme activities in juveniles Caspian Kutum, Rutilus frisii (Kamenskii, 1901). Fish with an initial average weight of 0.8 ± 0.2 g (means ± SD) were fed five isonitrogenous and isoenergic formulated diets with different carbohydrate levels of 15%, 20%, 25%, 30% and 35% in triplicate groups for 10 weeks (fifteen 45-L aquaria with 30 fish per tank and water temperature of 21.5–23.5°C). Based on the results, growth performance of Caspian Kutum was significantly improved by increasing carbohydrate levels from 15% to 35% (p 
      PubDate: 2017-06-17T18:16:58.840612-05:
      DOI: 10.1111/jai.13411
       
  • Identification of key nutrients for gonadal development by comparative
           analysis of proximate composition and fatty/amino acid profile in tissues
           and eggs of Chinese sturgeon (Acipenser sinensis Gray, 1835)
    • Authors: H. Zhou; X.-Q. Leng, Q.-S. Tan, H. Du, J.-P. Wu, X.-F. Liang, Q.-W. Wei
      Abstract: The present study was conducted to characterize the proximate composition and fatty/amino acid profile in muscle, liver and gonads obtained from farmed male and female Chinese sturgeon (Acipenser sinensis) with gonad development at stage II, and to discern the key nutrients for gonads by comparing the nutrients between tissues and between fish at different gonad stages. Chinese sturgeon were reared in an outdoor circular cement pool at temperatures ranging from 8°C to 26°C, and fed with 70% artificial diets and 30% frozen forage fish at a feeding rate of 0.2%–1.5% body weight according to the water temperature. Three male and three female A. sinensis were sampled for analyses. Results showed that the lipid content in gonads was significantly higher than in other tissues in both males and females (p 
      PubDate: 2017-06-17T16:48:45.250135-05:
      DOI: 10.1111/jai.13401
       
  • Length – length relationships of 16 Caribbean elasmobranchs
    • Authors: A. Tagliafico; M. S. Rangel, N. Rago
      Abstract: Elasmobranchs are commonly landed without fins and heads; however, the knowledge of total length is necessary for fishery management. We provide useful equations to extrapolate partial from elasmobranch carcasses lengths, to total lengths. Length-Length Relationships (LLR) are described for 16 commercial elasmobranch species all included in the IUCN Red List: Hexanchus nakamurai, Heptranchias perlo, Squalus cubensis, Squatina dumeril, Scyliorhinus boa, Mustelus minicanis, M. higmani, M. norrisi, Carcharhinus acronotus, C. falciformis, C. limbatus, Galeocerdo cuvier, Rhizoprionodon lalandii, R. porosus, Sphyrna lewini and Pseudobatos percellens. This study provide new LLR equations and rsepresent an improvement in the knowledge of these species.
      PubDate: 2017-06-14T00:40:23.15555-05:0
      DOI: 10.1111/jai.13417
       
  • Age, growth and reproduction of non-native largemouth bass Micropterus
           salmoides (Lacépède, 1802) populations in two temperate African
           impoundments
    • Authors: G. C. Taylor; O. L. F. Weyl
      Abstract: This study aims to improve the understanding of the establishment success of Micropterus salmoides by assessing growth, maturity and reproductive seasonality of two populations from the temperate region in South Africa. Results are compared to those from other populations to test previously proposed hypotheses that the (i) extent of the spawning season, (ii) longevity, and (iii) growth performance are environmentally temperature dependent. Micropterus salmoides were sampled monthly between March 2010 and March 2012 from Wriggleswade and Mankazana impoundments using either angling or multi-meshed (35, 45, 47, 57, 65, 73, 77, 93, 106, 118, 150 and 153 mm) multifilament gillnet fleets, and a 1 m seine net. The assessed populations in South Africa performed as expected compared to other introduced populations. Age at maturity (1.3–2 years) and length at maturity (232–254 mm FL) were similar to other temperate populations. A well-defined, spring spawning season conformed to findings in other temperate populations. Using sectioned sagittal otoliths it was shown that fish were long-lived (14 years). Growth rates differed significantly between the two assessed populations but both were slower growing than tropical and subtropical introduced populations. Growth performance (Φ′: 2.77–2.99) was similar to other temperate populations. These results indicate that the biology of introduced M. salmoides populations in South Africa is comparable to those of other temperate populations and supports the environmental temperature-dependent hypothesis.
      PubDate: 2017-04-27T08:24:33.032504-05:
      DOI: 10.1111/jai.13353
       
  • Comparative precision of age estimates from two southern reservoir
           populations of paddlefish [Polyodon spathula (Walbaum, 1792)]
    • Authors: J. M. Long; A. A. Nealis
      Abstract: The aim of the study was to determine whether location and sex affected the age precision estimates between two southern, reservoir populations of paddlefish [Polyodon spathula (Walbaum, 1792)]. From 589 paddlefish collected in Grand Lake and Keystone Lake, Oklahoma in 2011, ages from dentaries were estimated using three independent readers and precision was compared with coefficient of variation between locations and sexes. Ages were more precisely estimated from Grand Lake and from females.
      PubDate: 2017-04-24T23:40:28.74648-05:0
      DOI: 10.1111/jai.13394
       
  • Length–weight relationships of 21 fish species from the upland Ganga
           River Basin tributaries of Central Indian Himalaya
    • Authors: R. Singh Patiyal; J. Iqbal Mir
      Abstract: Length–weight relationships (LWRs) are described for 21 fish species belonging to six families from different tributaries of the upland Ganga Basin in India. LWRs for five selected species were unknown to FishBase and new maximum lengths are recorded for 13 species. These results will be useful for fishery research, management and conservation in these tributaries of the Ganga River basin.
      PubDate: 2017-04-24T03:25:56.745497-05:
      DOI: 10.1111/jai.13386
       
  • Development and characterization of 21 novel microsatellite markers for
           the Australian smelt Retropinna semoni (Weber, 1895)
    • Authors: M. R.-U. Islam; D. J. Schmidt, J. M. Hughes
      PubDate: 2017-04-24T03:25:55.295362-05:
      DOI: 10.1111/jai.13391
       
  • Length–weight relationships of three fish species from a tropical
           mangrove estuary of Sarawak, Malaysia
    • Authors: M. K. Abu Hena; M. H. Idris, A. H. Rajaee, M. A. M. Siddique
      Abstract: Length–weight relationships for three mangrove fish species, Setipinna melanochir (Bleeker, 1849), Ilisha elongata (Anonymous [Bennett], 1830), and Nibea soldado (Lacépède, 1802) were determined. Samplings were conducted in a tropical mangrove estuary, Sarawak, Malaysia (3°59′25.76′′N; 113°43′51.6′′E) at the peak of three different seasons using gillnets (100 × 2.5 m, mesh sizes 1, 2 and 4 inches) during 2014–2015. No information regarding length–weight relationships of these species was reported previously in FishBase.
      PubDate: 2017-04-23T23:31:43.484858-05:
      DOI: 10.1111/jai.13385
       
  • Growth and mortality of exploited fishes in China's coastal seas and their
           uses for yield-per-recruit analyses
    • Authors: C. Liang; D. Pauly
      Abstract: Given the scarcity of information suitable for other forms of fish stock assessments, the growth, and mortality of 10 important marine exploited fishes in China's coastal seas were estimated, based on published length-frequency data and the ELEFAN approach and software. The resulting parameters, complemented with growth curves from FishBase were then used for yield-per-recruit analyses. These 10 species were both traditional commercial species (Trichiurus lepturus, Larimichthys polyactis, Scomber japonicus) and less commercial interest species (Coilia nasus, Engraulis japonicus, Decapterus maruadsi, Psenopsis anomala, Coilia mystus, Setipinna tenuifilis, Harpadon nehereus). The yield-per-recruit analyses indicated that the fishing mortality experienced by these 10 fish species was very high, especially in view of the extremely small cod-end mesh sizes deployed by Chinese trawlers, of about 10 mm or less (vs. 25 mm as minimum legal size). More precisely, all 10 species suffered from growth overfishing, which was very pronounced in large species. Indeed, enlarging cod-end mesh size, by increasing mean sizes at first capture, would increase yield-per-recruit for all 10 fish species by a factor of up to 2.5. Obviously, such increases in mesh size would have to be in tandem with other management measures designed to ensure the sustainability of China's marine fisheries resources.
      PubDate: 2017-04-17T00:05:41.534645-05:
      DOI: 10.1111/jai.13379
       
  • First occurrence of the oceanic puffer, Lagocephalus lagocephalus
           (Linnaeus, 1758) in Iskenderun Bay, north-eastern Mediterranean, Turkey
    • Authors: D. Erguden; M. Gurlek, C. Turan
      PubDate: 2017-04-17T00:05:36.212248-05:
      DOI: 10.1111/jai.13363
       
  • Length–weight relationships for two loach species, Sinibotia
           superciliaris (Günther, 1892) and Sinibotia reevesae (Chang, 1944)
           collected from the Tuojiang River, China
    • Authors: Z.-Y. Wen; C.-J. Qin, B.-W. Xie, D.-Y. Yuan, R. Li, Y.-C. Zou
      Abstract: Length–weight relationships were determined for two loach species, Sinibotia superciliaris (Günther, 1892) and Sinibotia reevesae (Chang, 1944). Samples were collected with gill nets (30 × 15 m, mesh-size 1.5 cm) and fish cages (mesh-size 0.5 cm) as well as by electroshock (CWB-2000 P, 12 V, 250 HZ) between May 2013 and June 2015 from the Tuojiang River in southwest China. It is believed that the size range covered is close to a commonly known size range of each species. The length–weight relationship values of b were determined as 3.105 for S. superciliaris and 3.381 for S. reevesae. The data will be helpful in further research regarding these species in the upper Yangtze River Basin.
      PubDate: 2017-04-17T00:05:26.171367-05:
      DOI: 10.1111/jai.13393
       
  • Discards in bottom-trawl fishery in the western Black Sea (Turkey)
    • Authors: T. Yıldız; F. S. Karakulak
      Abstract: The aim of this study was to estimate the discards of target and non-target species from bottom trawlers (rhombic and 40 mm cod end mesh size nets) in the Black Sea. On-board sampling was conducted on the southwestern coasts of the Black Sea in the fishing ports of Rumelifeneri and Igneada for a total of 66 hauls on two commercial bottom trawlers from October 2012 to April 2013 and from October 2013 to April 2014. A total of 32 species were captured, including 25 species of fish, three crustacea, two echinodermata and two mollusca. Mullus barbatus and Merlangius merlangus euxinus were the target species, whereas 24 species were always discarded. Scophthalmus maximus and Pomatomus saltatrix were always retained. The two regions were similar in terms of catch and discard compositions, CPUE, DPUE and discard ratio. Discarding is important in the Black Sea commercial bottom trawl fishery and accounts for as much as 31.4% of the total bottom trawl catch. The results showed that the discard rates varied among species, depths (p = .04) and seasons (p = .0001). Finally, it was concluded that in the western Black Sea, when the impacts of depth and season are considered, that the discard quantity can be reduced.
      PubDate: 2017-04-11T06:17:10.130717-05:
      DOI: 10.1111/jai.13362
       
  • Length–weight relationships of nine fish species from the Tongjiang
           section of the Songhua River, China
    • Authors: T. B. Huo; M. Y. Yuan, J. L. Wang, P. L. Li, W. Liu, X. C. Wu
      Abstract: Length–weight relationships were evaluated for nine fish species from the Tongjiang section of the Songhua River in China. A total of 675 fish specimens were collected from 4 May to 29 October 2014. Length–weight relationships for six fish species (Romanogobio tenuicorpus, Leuciscus waleckii, Opsariichthys bidens, Microphysogobio amurensis, Pelteobagrus ussuriensis and Misgurnus mohoity) were new to FishBase in 2015, but the length–weight relationships of P. ussuriensis was studied by Ma in 2015. New data on M. mohoity is offered, and this study also shows new maximum total lengths for three fish species. The r2 values ranged from .95 to .99. Values of b varied from 2.504 to 3.471.
      PubDate: 2017-04-11T06:16:54.234966-05:
      DOI: 10.1111/jai.13373
       
  • Koi herpesvirus infection in experimentally infected common carp Cyprinus
           carpio (Linnaeus, 1758) and three potential carrier fish species Carassius
           carassius (Linnaeus, 1758); Rutilus rutilus (Linnaeus, 1758); and Tinca
           tinca (Linnaeus, 1758) by quantitative real-time PCR and in-situ
           hybridization
    • Authors: L. Gaede; J. Steinbrück, S. M. Bergmann, K. Jäger, H. Gräfe, H. A. Schoon, S. Speck, U. Truyen
      Abstract: Only single cells in the carrier fish species Carassius carassius (Linnaeus, 1758) for koi herpesvirus (KHV) are infected in contrast to large numbers in the susceptible species common carp Cyprinus carpio (Linnaeus 1758). Several species of the family Cyprinidae have been described as virus carrier species, showing no clinical signs of a KHV disease but able to transmit the virus to other susceptible fish. In this study, 72 common carp Cyprinus carpio (Linnaeus, 1758), 36 tench Tinca tinca (Linnaeus, 1758), 36 crucian carp Carassius carassius (Linnaeus, 1758) and 36 common roach Rutilus rutilus (Linnaeus, 1758) were experimentally infected with KHV (isolate “Israel”) by immersion and kept at 20°C. The fish were euthanized at 12 timepoints over a period of 90 days and virus DNA was quantified in tissues by a real-time TaqMan PCR. Whereas KHV-DNA was found in Cyprinus carpio for up to 90 days, the virus DNA was detectable only in single individuals of Rutilus rutilus, Tinca tinca and Carassius carassius for up to 25 days after experimental virus exposure. Tissue samples of Cyprinus carpio and Carassius carassius were screened by in-situ hybridization. Positive signals were found in various organs of the common carp tested crucian carp. In the latter species a much smaller number of virus-positive stained cells was detected compared to the infected carp.
      PubDate: 2017-04-10T07:26:16.818707-05:
      DOI: 10.1111/jai.13368
       
  • Seasonal variability of gillnet selectivity in Chilean hake Merluccius
           gayi gayi (Guichenot, 1848)
    • Authors: D. Queirolo; A. Flores
      Abstract: This study examines the seasonal variability in gillnet size selectivity for the main Chilean hake (Merluccius gayi gayi) fishery off the coast of central Chile. Selectivity estimates were based on five gillnet mesh sizes (50, 60, 70, 80, 90 mm) in four traditional fishing areas, and during periods of low and high reproductive activity. Average fish length caught in the earlier period (low reproductive activity) was 30.8 cm LT (±4.17), and significantly longer (p  .05). For females, however, both the selectivity factor and the estimated modal lengths changed significantly depending on the time of year (p 
      PubDate: 2017-04-10T07:26:14.953916-05:
      DOI: 10.1111/jai.13336
       
  • Length–weight and length–length relationships of four native fish
           species from the Yalong River, China
    • Authors: B. S. Ma; B. Xu, K. J. Wei, L. J. Deng, W. X. Gan, X. Y. Zhu, Y. H. Yao
      Abstract: Length-weight and length-length relationships were estimated for four native fish species from the Yalong River and its tributaries, China. A total of 976 specimens were collected monthly using trap nets and electric fishing in May 2013 and July 2015 to February 2016. This study presents the first references on LWRs (length–weight relationships) and LLRs (length–length relationships) for three species (Gymnocypris firmispinatus, Paracobitis variegatus and Euchiloglanis kishinouyei). Moreover, maturation length, absolute fecundity and predominant food items for the four species were also described in the study.
      PubDate: 2017-04-10T07:26:07.282873-05:
      DOI: 10.1111/jai.13359
       
  • Leiomyosarcoma in pickhandle barracuda, Sphyraena jello Cuvier, 1829
    • Authors: V. Singaravel; A. Gopalakrishnan, K. Raja, R. Vijayakumar
      PubDate: 2017-04-10T07:21:10.551158-05:
      DOI: 10.1111/jai.13366
       
  • First record of Maccallumtrema xiphiados and the Philichthys xiphiae in
           the striped marlin Kajikia audax (Philippi, 1887) off Cabo San Lucas, Baja
           California Sur, Mexico
    • Authors: S. Ortega-García; S. Hernández-Trujillo
      PubDate: 2017-04-10T07:21:02.449584-05:
      DOI: 10.1111/jai.13364
       
  • Length–weight relationships of four small indigenous fish species from
           an inland artisanal fishery, Bangladesh
    • Authors: M. A. Islam; M. A. B. Siddik, M. A. Hanif, M. R. Chaklader, A. Nahar, I. Ilham
      Abstract: This study reports the length–weight relationships (LWRs) of four small indigenous species, Trichogaster lalius (Hamilton, 1822), Nandus meni (Hossain & Sarker, 2013), Lepidocephalichthys annandalei (Chaudhuri, 1912) and Botia dario (Hamilton, 1822) collected between July 2015 and August 2016 from fishermen's catches landed in an inland fish landing center, northeastern Bangladesh. In the study, a new maximum total length (TL) is given for L. annandalei and LWRs of three species T. lalius, N. meni and L. annandalei for the first time in FishBase. Estimated LWRs were W = .014 TL3.17, (r2 = .982) for T. lalius, W = .006 TL3.38, (r2 = .961) for N. meni, W = .004 TL3.27, (r2 = .965) for L. annandalei and W = .020 TL2.87, (r2 = .978) for B. dario.
      PubDate: 2017-04-10T07:20:59.473727-05:
      DOI: 10.1111/jai.13374
       
  • Survival, growth and physiological responses of juvenile Japanese flounder
           (Paralichthys olivaceus, Temminck & Schlegel, 1846) exposed to different
           dissolved oxygen concentrations and stocking densities
    • Authors: H.-Y. Guo; X.-Y. Dong, X.-M. Zhang, P.-D. Zhang, W.-T. Li
      Abstract: The aim of this study was to determine to what extent juvenile Japanese flounder can adapt to different stocking densities in captivity and to examine whether growth and some physiological parameters critical for welfare might be affected by different dissolved oxygen levels. Japanese flounder (Paralichthys olivaceus) juveniles (initial weight 1.27 ± 0.04 g/fish) were reared at five stocking densities (500, 1,000, 1,500, 2,000, 2,500 ind/m3) and two levels of dissolved oxygen (DO) concentration (5.5 ± 0.5 mg/L or 14 ± 2 mg/L) with duplicate tanks for each treatment in water-recirculating systems for 40 days. Survival and activity of superoxide dismutase (SOD) were not affected either by stocking density or dissolved oxygen, whereas final body weight, specific growth rate (SGR) and feed conversion efficiency (FCE) of fish under low DO concentration decreased significantly with increasing stocking density. In contrast, growth of fish reared in high DO levels were unaffected by the stocking density. Furthermore, fish in this group had a higher feed intake and, consequently, grew faster (SGR) and achieved a higher final weight than fish reared at the low DO level. A significant reduction in hemoglobin (Hb) concentration and red blood cell (RBC) count of fish were recorded as DO concentration increased. Furthermore, the activity of protease decreased significantly with increasing stocking density and increased significantly with increasing DO concentration. The ventilation frequency results indicate that gill ventilation decreased significantly as DO levels increased. This study demonstrates that stocking density can affect the growth performance and physiological parameters critical for welfare of juvenile Japanese flounder. Also shown is that pure oxygen supplementation is an effective way to improve the growth of juvenile Japanese flounder when reared at a high stocking density.
      PubDate: 2017-04-10T07:20:58.478838-05:
      DOI: 10.1111/jai.13369
       
  • Trophic ecology of two syntopic sciaenid species (Micropogonias furnieri
           (Desmarest, 1823) and Ctenosciaena gracilicirrhus) (Metzelaar, 1919) in a
           tropical bay in south-eastern Brazil
    • Authors: M. M. Martins; H. S. Mendonça, S. S. Rodrigues, F. G. Araújo
      Abstract: Analyzed were the diets of two closely related species of Sciaenidae (Micropogonias furnieri and Ctenosciena gracilicirrhus) coexisting in high abundance in the outer zone of Sepetiba Bay. Their sizes and seasonal niche dimensions were also analysed. The tested hypothesis was that these two abundant species do not overlap in the trophic niche despite occurring in the same area and having similar sizes and body shapes and where an intraspecific overlap is likely to occur. The stomach contents of 198 M. furnieri specimens (85–280 mm total length) and 198 C. gracilicirrhus (49–131 mm total length) were examined. Quarterly diurnal fish samplings were performed using bottom trawls between winter 2012 and autumn 2013. In each season, three replicate tows were taken against the current during 20 min at the bottom with a towing speed of circa 4.5 km/hr, covering a distance of approximately 1,500 m. The trawl had an 8 m headline, 11 m ground rope, 25 mm stretched mesh and 12 mm mesh cod-end liner. Significant differences were detected in the diet between the two species (Pseudo-F = 5.16; p = .001) and among size classes (Pseudo-F = 2.23; p = .001), but not among seasons (Pseudo-F = 0.36; p = .920), according to PERMANOVA. Micropogonias furnieri fed mainly on Polychaeta and Caprella, whereas C. gracilicirrhus fed preferably on Caprella. Both species tended to specialize as they grew in size, with M. furnieri preferring Polychaeta, and C. gracilicirrhus specializing in Caprella. As expected, a high intraspecific niche overlap was observed among the size classes within each species, but not at an interspecific level and with the two syntopic species using different feeding resources.
      PubDate: 2017-04-10T07:20:55.415965-05:
      DOI: 10.1111/jai.13360
       
  • Length–weight relationships of two sympatric species (Knipowitschia
           byblisia Ahnelt, 2011 and K. caunosi Ahnelt, 2011) in Köycegiz Lake,
           Turkey
    • Authors: D. Innal; D. Giannetto
      Abstract: This study provides basic information on length–weight relationships for Knipowitschia byblisia Ahnelt, 2011 and Knipowitschia caunosi Ahnelt, 2011, two endemic species of Köycegiz Lake Basin (Southern-West of Turkey). Samplings were carried out seasonally from 2014 to 2015 by means of beach seine nets with mesh sizes from 10 to 35 mm. A total of 343 individuals from the two fish species were examined, with more specimens belonging to K. byblisa (90.4%). The total length–weight relationships were calculated as: W = 0.0054 TL3.384for K. byblisia and W = 0.0058 TL3.417for K. caunosi, respectively.
      PubDate: 2017-04-10T07:20:52.519123-05:
      DOI: 10.1111/jai.13376
       
  • Growth performance and metabolic response of juvenile grouper Epinephelus
           moara (Temminck & Schlegel, 1842) fed low dietary protein and high lipid
           levels
    • Authors: S. M. Peng; C. J. Zhang, Q. X. Gao, Z. H. Shi, C. Chen, J. G. Wang
      Abstract: Nine test diets were formulated at three low levels of crude protein (P; 35%, 40% or 45%) and three high levels of crude lipid (L; 9%, 12% or 15%) to investigate whether Epinephelus moara differs in the nutrient requirements from any of the other closely-related grouper species, and if there are any indications that a further decrease in protein with increasing dietary lipid would induce a higher protein-sparing effect. Fish (20.34 ± 0.82 g/ind) were distributed among 27 experimental cages (100 cm diameter, 80 cm depth), with 20 fish per cage and three replicates for each test diet. The experiment was conducted over an 8-week period at a temperature of 23.9–25.7°C. Weight gain and specific growth rate (SGR) tended to increase either with an increase in dietary protein level (at the same lipid level) or with the increase in dietary lipid level (at the same protein level, except at the 45% protein level). The highest weight gain and SGR occurred in fish fed the diet P45/L12. The serum cholesterol, high-density lipoprotein-cholesterol (HDL-C) and low-density lipoprotein-cholesterol (LDL-C) contents in fish were significantly increased as the dietary lipid increased. The increase of dietary protein significantly decreased the activities of serum and hepatic alanine aminotransferase (ALT) as well as aspartate aminotransferase (AST). Hepatic fatty acid synthase (FAS) activity significantly increased with the decrease of dietary protein and lipid levels (p 
      PubDate: 2017-04-10T07:20:51.473848-05:
      DOI: 10.1111/jai.13361
       
  • Development of polymorphic microsatellite loci for the design of
           management and conservation strategies of the critically endangered
           Barrens topminnow (Fundulus julisia, Williams & Etnier, 1982)
    • Authors: C. Hurt; A. Harman
      Abstract: The decline of the Barrens topminnow (Fundulus julisia), a small schooling fish endemic to the Barrens Plateau region of Middle Tennessee, is one of the most dramatic cases of species imperilment in eastern North America. Loss of undisturbed habitat, coupled with the introduction of the invasive Western Mosquitofish (Gambusia affinis) has led to the extirpation of 12 out of 14 natural populations since the 1980s. Identified is a set of 14 microsatellite loci to improve conservation and management strategies for the species. Four loci were cross-amplified using primers designed for congeneric taxa and 10 loci were developed from whole genome Illumina sequencing. Initial surveys in two populations suggest significant structuring of genetic variation and differing levels of heterozygosity among populations. These markers will contribute valuable information to ongoing conservation and management efforts.
      PubDate: 2017-04-10T07:20:47.876142-05:
      DOI: 10.1111/jai.13370
       
  • Length–weight relationships of three fish species in the East China
           Sea
    • Authors: Q. Wang; C. Y. Sha, J. Q. Zhang, D. F. Zhang
      Abstract: Length–weight relationships were determined for three fish species (Acanthopagrus latus Houttuyn, 1782; Acentrogobius caninus Valenciennes, 1837; and Nematalosa japonica Regan, 1917). Samples were collected from the East China Sea (N 27.306020, E 120.918026), from May to July in 2015–2016. Samples were collected using commercial trawls (5 cm main trawl and 3 cm codend mesh). Length–weight relationships for these three species were determined for the first time.
      PubDate: 2017-04-10T07:20:46.153674-05:
      DOI: 10.1111/jai.13375
       
  • Length–weight relationships of 12 indigenous fish species in the Gajner
           Beel floodplain (NW Bangladesh)
    • Authors: M. Y. Hossain; M. A. Hossen, Z. F. Ahmed, M. A. Hossain, M. N. U. Pramanik, F. Nawer, A. K. Paul, D. Khatun, N. Haque, M. A. Islam
      Abstract: The length–weight relationships (LWRs) were studied for 814 individuals covering eight families and 12 species of fish, e.g., Botia dario, Botia lohachata, Channa orientalis, Esomus danricus, Heteropneustes fossilis, Macrognathus pancalus, Nandus nandus, Ompok pabda, Pethia phutunio, Pethia ticto, Trichogaster fasciata and Trichogaster lalius captured from the Gajner beel floodplain, northwestern (NW) Bangladesh. Samples were collected occasionally from catches of fishermen from November 2014 to October 2015 using different types of traditional fishing gear, including gill net (mesh size ranges from 1.0 to 3.0 cm), cast net (mesh size ranges from 1.0 to 2.0 cm), square lift net (mesh size ~1.0 cm) and conical and box trap. The total length (TL) and body weight (BW) were measured for each individual. The allometric co-efficient b values ranged between 2.64 (B. lohachata) to 3.27 (N. nandus) and were highly significant, with p 
      PubDate: 2017-04-06T04:44:03.205272-05:
      DOI: 10.1111/jai.13354
       
  • Issue Information
    • First page: 663
      PubDate: 2017-07-07T04:35:11.029783-05:
      DOI: 10.1111/jai.13434
       
  • Movement and habitat use of juvenile Lake Sturgeon (Acipenser fulvescens,
           Rafinesque, 1817) in a large hydroelectric reservoir (Nelson River,
           Canada)
    • Authors: C. L. Hrenchuk; C. A. McDougall, P. A. Nelson, C. C. Barth
      First page: 665
      Abstract: Movement and habitat utilization of juvenile Lake Sturgeon (Acipenser fulvescens) were examined in Stephens Lake, a large hydroelectric reservoir on the Nelson River, Manitoba, Canada, between 21 June 2011, and 15 October 2012. Stephens Lake is defined by a sharp hydraulic gradient at the upstream end (Gull Rapids) and a pronounced reservoir transition zone (RTZ), characterized by a change in substrate composition from coarse to fine. Twenty juvenile Lake Sturgeon
      PubDate: 2017-05-14T23:05:42.31425-05:0
      DOI: 10.1111/jai.13378
       
  • Using adaptive resolution imaging sonar to investigate Chinese sturgeon
           (Acipenser sinensis Gray, 1835) behaviour on its only spawning ground in
           the Yangtze River
    • Authors: T. Chang; P.-C. Lin, X. Gao, F. Liu, Z.-H. Duan, H.-Z. Liu
      First page: 681
      Abstract: The present study investigated the presence of Chinese sturgeon Acipenser sinensis on its only remaining spawning ground (below the Gezhauba Dam), and monitored the behaviour under different environmental conditions from 24 December 2015 to 23 January 2016. A fixed ARIS (Adaptive Resolution Imaging Sonar) system was used and a total of 72 Chinese sturgeon were detected during nine observations. Detections initially recorded a few A. sinensis in the early days of late-December 2015, with an increase in recordings, leading to a peak in early-January 2016 and declining thereafter. Water temperature slowly decreased during the study period from 18.1 to 15.7°C. During the middle of this temperature decline the sturgeon observations peaked, suggesting that Chinese sturgeon could have an optimal temperature range. The sturgeon Detections Per Unit Effort (DPUE) was higher in the night hours, peaking before dawn, suggesting a circadian behaviour rhythm. Sturgeon spawning was not observed during the investigation period. A delay in the decrease in water temperature caused by the Three Gorges Reservoir and the few numbers of reproductively mature individuals are suspected to have contributed to the failure in natural breeding.
      PubDate: 2017-05-30T02:20:36.317585-05:
      DOI: 10.1111/jai.13406
       
  • Characterization of feeding habits, prey diversity and diet overlap of two
           sympatric species: Bronze catfish, Netuma bilineata (Valenciennes, 1840)
           and blacktip sea catfish, Plicofollis dussumieri (Valenciennes, 1840) in
           the northern Arabian Sea
    • Authors: N. Farooq; N. Qamar, S. K. Panhwar
      First page: 709
      Abstract: This study describes the diet composition, diet overlap and prey diversity in two economically and ecologically important marine catfish species: the bronze catfish (Netuma bilineata) and the blacktip sea catfish (Plicofollis dussumieri) collected between January and December 2015 from the northern Arabian Sea coast of Pakistan. Stomach data of 342 bronze catfish and 283 blacktip sea catfish were examined. Diet composition and feeding strategy of each species by identification of stomach contents were weighed and enumerated. Both species primarily consumed teleosts, Brachyura and small amounts of a wide variety of prey items; however, specialization was a more common trait for the bronze catfish than for the black tip sea catfish. The Morisita-Horn index showed considerable diet overlap in percentage of mean weights (0.847) than in numbers (0.612) between co-prey pairs of both species. The highest Bray-Curtis similarity between the southwest monsoon (SWM) and south inter monsoon (SIM) was observed in bronze catfish and lowest between autumn inter monsoon (AIM) seasons in both species. While Bray-Curtis dissimilarity was observed, both species share diet niches and diet overlap. The present study evaluation of the feeding strategy and potential competition between two sympatric species of marine catfishes can provide the framework for their conservation and management in the region.
      PubDate: 2017-05-05T07:11:04.049089-05:
      DOI: 10.1111/jai.13377
       
  • Anaesthesia and transport of juvenile tambaqui Colossoma macropomum
           (Cuvier, 1818) with tricaine methane-sulphonate: Implications on secondary
           and oxidative stress responses
    • Authors: L. A. L. Barbas; P. M. Pereira-Cardona, L. C. Maltez, L. O. Garcia, J. M. Monserrat, L. A. Sampaio
      First page: 720
      Abstract: The aim of this study was to evaluate the anaesthetic efficacy and the effect of sedation with tricaine (TMS®), also known as MS-222, on secondary and oxidative stress parameters in juvenile tambaqui, Colossoma macropomum transported in hyperoxia for 2, 6 and 10 hr. Juveniles were placed in aquaria containing six different concentrations of buffered tricaine (150, 180, 210, 240, 270 and 300 mg/L) and the times for anaesthesia induction and recovery determined. Fish transported in hyperoxic conditions were investigated for glycemia, ionic concentration (K+, Ca++, Na+) and osmolality, haematocrit (Ht) and haemoglobin concentration (Hb), partial pressure of gases (pCO2 and pO2), pH and bicarbonate concentration (HCO3−) in whole blood collected from caudal vasculature. Total antioxidant capacity against peroxyl radicals (ACAP), glutathione-S-transferase (GST) activity and lipid peroxidation levels (TBARS) were investigated in gills, brain and liver. All concentrations of TMS® induced deep anaesthesia in juvenile tambaqui in this study. A concentration of 240 mg/L of TMS® was sufficient to induce rapid anaesthesia (
      PubDate: 2017-05-03T05:45:37.964664-05:
      DOI: 10.1111/jai.13382
       
  • Growth, biochemical, fatty acid composition, and mRNA levels of hepatic
           enzymes in genetically improved farmed tilapia (GIFT, Oreochromis
           niloticus) (Linnaeus, 1758) at different stocking densities
    • Authors: J. Qiang; J.-W. Bao, J. He, Y.-F. Tao, H.-M. Habte-Tsion, P. Xu
      First page: 757
      Abstract: Investigated were the effects of stocking density on juvenile growth performance, serum biochemistry, fatty acid composition, and mRNA levels of enzymes involved in lipid metabolism in genetically improved farmed tilapia (GIFT), Oreochromis niloticus. Juvenile fish (n = 900) were distributed into 15 tanks at five initial stocking densities (75, 150, 225, 300, and 375 g/m3 per 800-L tank, represented as D1–D5, respectively). Temperature was maintained at 28 ± 0.3°C, and water flow rate into the tanks was about 8 L/min. The fish accepted floating pelleted feed (crude protein 28%, crude lipid 6%, and gross energy 149.2 KJ/g diet). The feed amount offered was 4%–8% of body weight. At the end of the 60-day experiment, the final stocking densities were 1,454.18, 2,010.60, 2,913.13, 3,819.73, and 4,380.80 g/m3, respectively. Growth and body mass coefficient of variation were significantly affected (p  .05). Muscle lipid contents decreased with stocking density from D1 to D5. Serum total protein and cholesterol levels were not affected by the stocking density but the D5 group produced the highest serum cortisol and lactate levels and the lowest glucose levels compared to those of the other groups. Lower muscle saturated fatty acid and n−3 polyunsaturated fatty acid contents were observed in the D4 group than in the other groups, whereas the reverse was found in the n−6 polyunsaturated fatty acid content. Hepatic glucose 6-phosphate dehydrogenase, fatty acid synthetase, hormone-sensitive triglyceride lipase, and lipoprotein lipase mRNA levels were significantly upregulated in response to a high density. These data suggest that the GIFT adapted to high-density conditions by altering the composition of muscle fatty acid and stimulating lipid metabolic enzymes. These mechanisms may help fish respond to high stocking density stress in intensive aquaculture systems.
      PubDate: 2017-05-22T01:50:52.345843-05:
      DOI: 10.1111/jai.13330
       
  • Fatty acid profiles of Trachinus radiatus Cuvier, 1829
           (Perciformes-Trachinoidei, Trachinidae)
    • Authors: D. Đikić; I. Landeka, D. Franjević, D. Skaramuca, R. Fuchs, S. Matić Skoko, P. Tutman, I. Lukić, B. Skaramuca
      First page: 785
      Abstract: The goal of this study was to analyse the fatty acid (FA) profiles of the streaked (starry) weever (Trachinus radiatus), a prized food fish in the countries of its distribution. Fish (N = 20) were sampled in July 2011. Location: 42.761019°N, 17.765090°W; Adriatic Sea, Elaphite Islands near Dubrovnik, Croatia, at 5–10 m depth using longline hooks; body length ranges: 24.1–47.2 cm, weight ranges: 120–960 g. Morphological species determination was genetically confirmed (Folmer region of COI gene). Biochemical analysis of T. radiatus muscular tissue (filet) revealed average ± SD dry matter of 252.3 ± 14.8 g/kg w.w.; moisture of 747.7 ± 14.8 g/kg w.w., and ash of 28.0 ± 6.9 g/kg w.w. Intramuscular crude protein content exceeded the total lipid (TL = 11.9 ± 4.0 g/kg w.w.) content approximately 17.7 fold. Unsaturated FA (UFA) was higher than saturated FA (SFA), with a predominance of polyunsaturated FA (PUFA). The ω3:ω6 ratio was 4.9:1, respectively. Among individually determined fatty acids, the PUFA 22:6n3 (DHA) was highly present (29.99 ± 2.75% TL) followed by a relatively high 20:5n3 (EPA) content. There was 25 fold higher EPA content than of substrate αLNA, and a 15.5 fold higher DHA content to DPAn3. Such ratios indicate that besides trophic ingestion, FA bioconversion elongase/desaturase synthesis pathways toward ω3 PUFA in Weevers could be highly efficient.
      PubDate: 2017-04-06T04:43:59.169476-05:
      DOI: 10.1111/jai.13356
       
  • First record of exotic Piaractus brachypomus Cuvier, 1818 (Characiformes:
           Serrasalmidae) in Zarivar Lake, western Iran
    • Authors: F. Zarei; H. Rajabi-Maham
      First page: 810
      PubDate: 2017-05-14T23:05:29.823163-05:
      DOI: 10.1111/jai.13383
       
  • First record of the rare anthiine Meganthias kingyo (Kon, Yoshino &
           Sakurai, 2000) (Serranidae) from the Philippines
    • Authors: M. M. Saceda-Cardoza; A. R. Bos
      First page: 813
      PubDate: 2017-05-22T06:35:24.79563-05:0
      DOI: 10.1111/jai.13409
       
  • Larval distribution of the common dolphinfish Coryphaena hippurus
           Linnaeus, 1758 (Coryphaenidae) in the East Sea/Sea of Japan
    • Authors: J. M. Park; S.-H. Huh, H. C. Choi, S. N. Kwak
      First page: 815
      PubDate: 2017-05-22T06:35:35.077944-05:
      DOI: 10.1111/jai.13387
       
  • Twelve novel microsatellite markers for the Chinese golden loach Sinibotia
           superciliaris (Günther 1892)
    • Authors: S. Liu; Y. Wang, B. Xie, Z. Peng
      First page: 821
      PubDate: 2017-05-14T23:05:50.983375-05:
      DOI: 10.1111/jai.13395
       
  • Effect of Anilocra frontalis parasitization on the thermal tolerance,
           acclimation capacity and condition of its fish host Pomatoschistus microps
           (Krøyer, 1838)
    • Authors: R. Cereja; V. Mendonça, M. Dias, D. Madeira, C. Vinagre
      First page: 829
      PubDate: 2017-05-22T06:35:28.316174-05:
      DOI: 10.1111/jai.13403
       
  • Length–weight relationships of 10 freshwater fish species from an
           intermittent river basin, semi-arid region, Brazil
    • Authors: B. F. Terra; F. K. Teixeira, C. F. Rezende
      First page: 832
      Abstract: The length–weight relationships for 10 freshwater fish species from an intermittent river basin in a semi-arid region of Brazil were analyzed. Specimens were caught using a dragnet (3.5 × 2.5; stretched mesh size 5 mm) during running and pool phases from January to November 2015. The specimens were measured for total length and weight. Previously unavailable in FishBase, the detailed length–weight relationships of Compsura heterura, Phenacogaster calverti, and Serrapinnus piaba are reported for the first time. All fish collected presented total lengths (TL) lower than the maximum reported in FishBase.
      PubDate: 2017-04-06T02:04:39.191403-05:
      DOI: 10.1111/jai.13357
       
  • Length–weight and length–length relationships of 20 fish species from
           the upper Yangtze River, southwest China
    • Authors: F. Xiong; H. Y. Liu, X. B. Duan, S. P. Liu, D. Q. Chen
      First page: 835
      Abstract: Length–weight (LWR) and length–length (LLR) relationships were estimated for 20 species of fish from the upper Yangtze River, southwest China. Samples were collected using multiple types of gear (2–6 cm mesh trammel nets, 2 cm mesh trap nets, and baited hooks) in Jiangjin and Yibin sections from 2007 to 2009. New maximum lengths for 16 species were recorded for FishBase. LWRs were significant for all species. Standard length–total length equations for converting size measurements for these 20 species are also presented. The results provide primary data for future fish research and conservation.
      PubDate: 2017-04-06T02:04:40.264371-05:
      DOI: 10.1111/jai.13358
       
  • Length–weight relationships of three fish species from the South
           China Sea
    • Authors: W. Xiong; M. R. Yi, C. X. Zhao, J. Y. Wu, X. Y. Ma, Z. L. Li, Y. R. Yan
      First page: 846
      Abstract: The length–weight relationships were determined for three fish species: Histiopterus typus (Temminck & Schlegel, 1844), Branchiostegus argentatus (Cuvier, 1830), and Ilisha elongata (Anonymous [Bennett], 1830). Samples were collected from the South China Sea with commercial trawls in June 2016 using trawl nets. Prior to this study the length–weight relationships for these three species were unknown.
      PubDate: 2017-04-06T02:04:35.516556-05:
      DOI: 10.1111/jai.13367
       
  • Length–weight and length–length relationships for eight fish species
           from the Jarrahi River, southwestern Iran
    • Authors: Y. Keivany; M. Zamani-Faradonbe
      First page: 864
      Abstract: Length–weight and length–length relationships were estimated for eight fish species belonging to three families from the Jarrahi River in southwestern Iran. The study was performed between June 2009 and September 2011. Weight–length relationships were estimated using the logarithmic form of the equation W = aLb. The b values varied between 2.96 and 3.61 and determined as 3.42 for Alburnus mossulensis Heckel, 1843; 3.33 for Alburnoides idignensis Bogutskaya and Coad, 2009; 2.85 for Barbus grypus Heckel, 1843; 3.61 for Barilius mesopotamicus Berg, 1932; 3.16 for Cyprinion kais (Heckel, 1843); 3.36 for Cyprinion macrostomum Heckel, 1843; 3.27 for Paraschistura nielseni (Nalbant and Bianco, 1998); and 2.96 for Glyptothorax silviae Coad, 1981. This study presents the first LWR and LLR references for these species in the Jarrahi River.
      PubDate: 2017-05-22T01:50:43.518419-05:
      DOI: 10.1111/jai.13396
       
  • Length–weight relationships of three fish species from Liaodong Bay,
           Bohai Sea, China
    • Authors: Z.-X. Wu; G.-J. Yang, L. Song
      First page: 867
      Abstract: Length–weight relationships (LWRs) in the present study were determined for three fish species: Collichthys niveatus Jordan & Starks, 1906; Ctenotrypauchen chinensis Steindachner, 1867 and Liparis tanakae (Gilbert & Burke, 1912), collected from Liaodong Bay, Bohai Sea, China using bottom trawl nets from June to August 2014. The b parameters in the fitted LWRs for the three fish species were 2.882, 2.991 and 3.353, respectively. A new maximum total length (15.6 cm) for C. chinensis was recorded. The LWRs for the three fish species are first reported in FishBase.
      PubDate: 2017-05-19T05:57:04.19832-05:0
      DOI: 10.1111/jai.13392
       
  • Length–weight relationship of five fish species from the Xiaonanhai
           reach of the Upper Yangtze River, southwest China
    • Authors: Q.-G. Zhu; Z. Yang, W.-X. Cao
      First page: 871
      Abstract: Length–weight relationships (LWRs) were determined for five fish species, including two endemic species [Platysmacheilus nudiventris (Luo, Le & Chen, 1977), and Rhinogobio cylindricus (Günther, 1888)] from the Xiaonanhai reach of the Upper Yangtze River in southwest China. Samples were obtained between July 2011 and October 2012 using various types of fishing gear and electroshock fishing techniques. 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 two species were unknown to FishBase, and new maximum lengths are recorded for two species.
      PubDate: 2017-05-14T23:05:43.525514-05:
      DOI: 10.1111/jai.13388
       
  • Effect of conservation of fish in formalin and ethanol on length-weight
           relationships and condition factor in Tlaloc labialis (Günther, 1866)
    • 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.
       
  • Morphological and morphometric changes of sagittae otoliths related to
           fish growth in three Mugilidae species
    • 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.
       
  • Influence of cortisol along the pituitary-ovary axis in the cichlid fish
           Oreochromis mossambicus
    • 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.
       
  • Length-weight and length-length relationships of Balitora brucei Gray,
           1830 and Psilorhynchus balitora (Hamilton, 1822) from the Ranganadi river
           of Assam, India
    • 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.
       
  • Assessment of Epinephelus coioides (Hamilton, 1822) aquaculture systems in
           the Gulf of Tonkin, Vietnam, by using fish parasites
    • 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.
       
  • Finfish species richness and structure in the tidal-associated lagoons of
           Badin, Sindh, Northern Arabian Sea
    •  
  • The Chinese sleeper (Perccottus glenii Dybowski, 1877) in Ukraine: New
           data on distribution
    • 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.
       
  • Length–weight relationships of fishes from the estuary of the Macaé
           River, Southeastern Brazil
    • 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.
       
  • A new distribution of the buffon's river garfish, Zenarchopterus buffonis
           (Valenciennes, 1847) in the southern coastal rivers of Bangladesh
    •  
  • Length-weight relationships of three fish species collected by
           recreational fishing in the northern coast of Yucatan Peninsula, Mexico
    • 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.
       
  • Diversity of parasites in Cichlasoma amazonarum Kullander, 1983 during
           rainy and dry seasons in eastern Amazon (Brazil)
    • 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.
       
  • Morphometric relationships for some species of elasmobranch from tropical
           eastern Pacific
    • 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.
       
  • Length–weight relationships of 11 fish species from the Nuoshuihe
           Precious Water Animal National Nature Reserve, southwestern China
    • 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.
       
  • 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)
    • 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.
       
  • Length–weight and length–length relationships of 26 fish species from
           the Yiluo River, a tributary of the Yellow River, China
    • 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 
       
  • Age and growth of Triplophysa anterodorsalis Zhu & Cao, 1989 in the
           Heishui River, China
    •  
  • Length-weight relationship of two mudskippers (Gobiidae: Oxudercinae)
           Oxuderces dentatus (Eydoux & Souleyet, 1850) and Scartelaos histophorus
           (Valenciennes, 1837) from Dhamara estuary, Odhisa, India
    • 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.
       
  • Length- and age-based demographics of exploited populations of stout
           whiting, Sillago robusta Stead, 1908
    • 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.
       
  • Length–weight relationship of Rastrelliger brachysoma (Bleeker, 1851)
           and Rastrelliger faughni Matsui, 1967 from the Andaman Islands, India
    • 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.
       
  • Weight-length relationships of 3 demersal fish species from Lebanese
           marine waters, eastern Mediterranean
    • Abstract: Weight-length relationships (WLRs) were estimated for 3 demersal species, from the Lebanese marine waters, eastern Mediterranean, namely Coelorinchus caelorhincus (Risso, 1810), Scorpaena elongata Cadenat, 1943 and Stephanolepsis diaspros Fraser-Brunner, 1940. The specimens were collected using trammel and gill nets from June 2012 to October 2014. The values of parameter b of the WLRs W = aLb ranged from 2.922 to 3.708. Pronounced sexual dimorphism in WLR was observed for S. diaspros and none showed a WLR-based geographical pattern of distribution. WLRs reported in this study should be applied only within the observed length ranges.
       
  • Length–weight relationships of six fish species from Tapajós River,
           Eastern Amazon, Brazil
    • 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.
       
  • Comparative analyses of reproductive activity in Schizodon knerii
           (Steindachner, 1875) (Characiformes: Anostomidae) in three sections of the
           São Francisco River basin
    • 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.
       
  • Length-weight relationships for freshwater fish species from humid forest
           enclaves at the Brazilian semiarid
    • 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.
       
  • Relationships between fish and otolith size of nine deep-sea fishes from
           the Andaman and Nicobar waters, North Indian Ocean
    • Abstract: The study presents for the first time the otolith morphology of nine deep-sea fishes (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). Numerical relationships derived from the relation between size of the otolith and the fish can be used as predictors to estimate the prey size and to understand the trophic relations and food web dynamics of these less studied deep-sea organisms. The study was based on sampling carried out onboard 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. 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. 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.
       
  • Effects of water temperature and initial weight on growth, digestion and
           energy budget of yellow catfish Pelteobagrus fulvidraco (Richardson, 1846)
           
    • 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 
       
  • 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
    • 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.
       
  • Cohort-specific estimates of first-year survival are positively associated
           with size at stocking for lake sturgeon Acipenser fulvescens (Rafinesque
           1817) stocked in Black Lake, Michigan, USA
    • Abstract: The authors conducted a gillnet survey in 2013 in Black Lake, Michigan, USA to evaluate the lake sturgeon (Acipenser fulvescens) stocking programme that began in 2001. Objectives were to (i) estimate year-class specific abundance of juvenile lake sturgeon in Black Lake; and (ii) determine year-class specific survival of stocked year classes and determine whether year-class-specific first-year survival was related to average size at the time of stocking. Deployed were 15 and 20 cm stretch mesh gillnets at 72 randomly selected sites in Black Lake over a 3-week survey using a Schnabel multiple-mark, multiple-recapture estimator to determine overall abundance of stocked fish. Ages for captured fish were determined from fin ray cross sections and the presence of coded wire tags, and apportioned the overall abundance estimate of juveniles to year class using an age-length key. Overall survival estimates were calculated by dividing the year-class specific abundance estimates by the number of fish stocked that year. Also evaluated was the relationship between first-year survival and average total length (TL) at time of stocking using logistic regression. Overall survival from stocking to 2013 ranged from 0.03 to 0.53. First-year survival was positively associated with average TL at stocking, and ranged from 0.05 for fish stocked at 9 cm TL to 0.84 for fish stocked at 22 cm TL. Estimation of future cohort-specific abundance based on size-based expected survival allows managers to establish annual stocking targets that should lead to the achievement of long-term population goals for adult abundance.
       
  • Length–weight relationships of three catfish species from a tributary of
           the Dhaleshwari River, Bangladesh
    • 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 
       
  • The use of live and frozen Artemia salina nauplii enriched with
           fluorochromes for mass-marking vendace Coregonus albula (L.) larvae
    • 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.
       
  • 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
    • 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.
       
  • Length-weight relationships of four freshwater fish species from the
           coastal drainage system in Peru
    • 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.
       
  • Length-weight relationship of Thryssa malabarica (Bloch, 1795) and Thryssa
           dayi Wongratana, 1983 from Kerala, southwest coast of India
    • 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.
       
  • Bull ray, Aetomylaeus bovinus (Geoffroy Saint-Hilaire, 1817)
           (Myliobatidae) in the Mediterranean Sea and captures of juveniles from
           Izmir Bay (Aegean Sea, Turkey)
    •  
  • Length–weight relationships of seven fish species from the Yuan
           River, China
    • 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.
       
 
 
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