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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  [1611 journals]
  • Length–weight relationships of four fish species from the MoTuo reach of
           the Yarlung Zangbo River, southwest China
    • Authors: L. Li; B. Ma, J.-L. Wang, C. Zhang, J.-H. Gong
      Abstract: Length–weight relationships (LWRs) were evaluated for four fish species from the MoTuo reach of the Yarlung Zangbo River, southwest China: Exostoma labiatum (McClelland, 1842), Schizothorax curvilabiatus (Wu & Tsao, 1992), Nemacheilus subfusca (McClelland, 1839), and Garra kempi Hora, 1921. The a values ranged from 0.0094 (Schizothorax curvilabiatus) to 0.0151 (Exostoma labiatum), b values from 2.698 (Exostoma labiatum) to 2.974 (Schizothorax curvilabiatus), and r2 values from 0.976 (Nemacheilus subfusca) to 0.995 (Schizothorax curvilabiatus). A total of 427 fish specimens were collected by electrofishing in April 2015, with LWRs previously unknown to FishBase for four of the species. New maximum lengths are recorded in FishBase for three of these species: Schizothorax curvilabiatus, Nemacheilus subfusca, and Garra kempi.
      PubDate: 2016-10-19T23:50:22.301755-05:
      DOI: 10.1111/jai.13120
  • Length-weight relationships of 10 freshwater fishes from the Busan
           Metropolitan City in South Korea
    • Authors: D.-K. Kim; J.-S. Gim, J.-D. Yoon, Y. Do, G.-J. Joo, H. Jo
      Abstract: The length-weight relationships (LWRs) for 10 freshwater fish species in catchment area of Busan Metropolitan City, South Korea, were analyzed. Fish samples were collected quarterly using scoop-nets (mesh 5 mm), casting nets (mesh 7 mm) and gill nets (mesh 20, 50 and 70 mm) from 2011 to 2016. LWRs data for seven of these species have not yet been listed in FishBase.
      PubDate: 2016-10-15T01:50:32.839768-05:
      DOI: 10.1111/jai.13228
  • Effects of ammonia on growth, digestion and antioxidant capacity in
           juvenile yellow catfish Pelteobagrus fulvidraco (Richardson, 1846)
    • Authors: L. Zhang; Z.-G. Zhao, Q.-X. Fan
      Abstract: Effects of ammonia stress on food ingestion, growth, digestion and antioxidant capacity were investigated in juvenile yellow catfish Pelteobagrus fulvidraco (Richardson) with initial body weights of 20.24 ± 0.18 g. The fish were reared in triplicate in 15 experimental tanks at a rate of 30 fish per tank for 56 days. Water was maintained at a dissolved oxygen (DO) level of over 6.2 mg L−1, pH 7.2–7.6, and temperature of 29.0 ± 1.5°C under a natural 12L: 12D photoperiod. Survival, food ingestion (FI), specific growth rate (SGR), food conversion efficiency (FCE), apparent digestibility coefficient (ADC), total antioxidant capacity (T-AOC), levels of glutathione (GSH) and malonaldehyde (MDA), and activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-PX) of the juveniles were determined in total ammonia nitrogen (NH3-N+NH4-N) levels of 0 (control group), 3.36, 6.72, 13.44 and 26.88 mg L−1. The results show that the survival, FI, SGR, FCE, and ADC decreased significantly with an increase in total ammonia nitrogen (p 
      PubDate: 2016-10-11T07:05:35.27978-05:0
      DOI: 10.1111/jai.13203
  • Length–weight and length-length relationships for four freshwater fish
           species from Gölbaşı Lake (Hatay), Turkey
    • Authors: G. Özcan; A. Altun
      Abstract: Length–weight and length–length relationships are presented for four freshwater fish species [Liza abu (Heckel, 1843), Aphanius mento (Heckel, 1843), Oxynoemacheilus hamwii (Krupp & Schneider, 1991) and Chondrostoma kinzelbachi Krupp, 1985] captured in Gölbaşı Lake, Hatay, Anatolia. No information regarding length–weight relationships was reported previously in FishBase for C. kinzelbachi, A. mento and O. hamwii. Specimens were obtained from January to May 2012 using electrofishing and cast nets. This study presents the first study on LWR data for C. kinzelbachi, A. mento and O. hamwii.
      PubDate: 2016-10-11T04:31:43.450303-05:
      DOI: 10.1111/jai.13215
  • Mortality of non-target flatfishes escaping from demersal trawl codends
    • Authors: F. O. Düzbastılar; C. Aydın, B. Gül
      Abstract: Mortality of non-target flatfishes that had escaped from various sizes (40, 44 and 50 mm) of codend meshes was determined by capturing and holding the escapees in cages for 7 days. Although three flatfish species were studied, sufficient data for detailed analyses were obtained only for Buglossidium luteum (Risso, 1810) (solenette). Trawl hauls (48 in total) with 15 min towing durations were conducted in the summer and winter seasons of 2011 and 2012. A tailored bottom trawl with 800 meshes around the mouth was used with covers to capture fish. Covers were used as an observation cage, and were fixed to the sea bottom at depths of 3.0–8.2 m. The monitoring period was 7 days. It was estimated that average escape mortality of B. luteum for all test cages (96.5%) in summer was significantly higher (p  .01), with the exception of the 2011 winter; however, the mortality rate was inversely related to fish length in most cases (p 
      PubDate: 2016-10-11T04:31:40.161834-05:
      DOI: 10.1111/jai.13220
  • Habitat rehabilitation for juvenile fish in urban waterways: A case study
           from Berlin, Germany
    • Authors: A. Weber; C. Wolter
      Abstract: This study examines the improvement of juvenile fish recruitment by technical rehabilitation measures implemented in two urban waterways in Berlin, Germany: the River Spree and the Teltow Canal. Rehabilitation sites provide new littoral habitats protected from navigation-induced flow and wake wash and are intended to improve habitat quality for juvenile fish and to support urban fish diversity. Both sites and four control sites with common embankments have been sampled monthly by point electric fishing (875 dips in total) from May to September 2009. In total, 6,243 fish were caught representing 12 species. Two of the species, roach (Rutilus rutilus) and perch (Perca fluviatilis), dominated the fish community, comprising 81.5% and 16.1% of the total catch. Nine species were rare, with relative abundances
      PubDate: 2016-10-11T04:31:32.425645-05:
      DOI: 10.1111/jai.13212
  • Dietary folic acid (FA) requirement of a genetically improved Nile tilapia
           Oreochromis niloticus (Linnaeus, 1758)
    • Authors: J.-P. Wu; F. Wu, M. Jiang, H. Wen, Q.-W. Wei, W. Liu, J. Tian, F. Huang, C.-G. Yang
      Abstract: The present study was conducted to determine the dietary folic acid (FA) requirement of genetically improved Nile tilapia, Oreochromis niloticus. Experimental diets were supplemented with 0.04, 0.22, 0.48, 0.96, 2.25, or 4.07 mg/kg FA, respectively, and fed to three replicate groups of 15 tilapia (mean initial weight = 60.23 ± 2.60 g; mean ± SD) for 12 weeks. Results showed that the weight gain rate increased linearly with increasing dietary FA from 0.04 to 0.40 mg/kg, then remained stable with higher supplementation. Similarly, hepatic FA concentration, red blood cell count (RBC), hemoglobin concentration (HB) and hematocrit (HCT) all markedly increased in fish fed with 4.07 mg/kg FA compared to those fed a control diet (p 
      PubDate: 2016-10-11T04:31:20.907775-05:
      DOI: 10.1111/jai.13151
  • Length–weight relationships of three fish species from the Yalong
           River, China
    • Authors: M. Zhang
      Abstract: Length–weight relationships (LWRs) were determined for three fish species (Gymnodiptychus pachycheilus (Herzenstein, 1892), Triplophysa bleekeri (Sauvage & Dabry de Thiersant, 1874) and Triplophysa pseudostenura (He, Zhang & Song, 2012)) from the Yalong River in China. Samples were obtained between March 2009 and July 2013 using gillnets (25 × 12 m, mesh size 0.5 cm) and fish cages (0.5 × 0.5 × 10 m, mesh size 0.5 cm mesh). For each species, the sample size, length range, weight range, LWR, 95% confidence intervals of a and b, and coefficient of correlation were determined. Prior to this study, the LWRs for these three species were unknown.
      PubDate: 2016-10-11T04:31:11.47591-05:0
      DOI: 10.1111/jai.13233
  • Nine novel microsatellites for the cavefish (Triplophysa rosa Chen &
           Yang, 2005)
    • Authors: S. Liu; A. Ludwig, Z. Peng
      PubDate: 2016-10-11T04:31:10.395682-05:
      DOI: 10.1111/jai.13231
  • First record of smoltified rainbow trout Oncorhynchus mykiss (Walbaum,
           1792) in the main riverbed of the Serbian part of the Danube River
    • Authors: M. Nikčević; S. Skorić, G. Cvijanović, B. Mićković, A. Hegediš
      PubDate: 2016-10-04T07:32:11.645549-05:
      DOI: 10.1111/jai.13230
  • Length–weight and length–length relationships of 11 fish
           species from the Sea of Okhotsk
    • Authors: V. V. Kulik; N. N. Gerasimov
      Abstract: Estimated length–weight relationships are presented for 11 marine fish species representing six families, found above the continental shelf and in the pelagial of the Okhotsk Sea. A total of 13,841 specimens were caught by trawls that were equipped with a 1.0 by 1.2 cm mesh webbing inset. The period between 1974 and 2015 comprised mostly spring and autumn months. All length–weight relationships were highly significant (r2 ≥ .95) on a log scale. None of the species had previous length–weight estimates, and two species had no previous length–length estimates in the FishBase.
      PubDate: 2016-10-04T07:32:10.665762-05:
      DOI: 10.1111/jai.13225
  • Length–weight relationships of two cavefish species, Sinocyclocheilus
           jii Zhang & Dai, 1992 and Sinocyclocheilus guilinensis Ji, 1985
           (Cypriniformes: Cyprinidae)
    • Authors: J.-Q. Huang; Z.-Q. Wu, Y.-H. Zhao
      Abstract: Length–weight relationships of two cavefish species, Sinocylocheilus jii Zhang & Dai, (Acta Zootaxonomica Sinica, 17, 1992, 377) and Sinocyclocheilus guilinensis Ji, 1985, were calculated based on data from 186 specimens sampled by gill nets and fish traps from subterranean rivers of the Pearl River basin in China between 2008 and 2014. Results indicate that mean LWR parameters b for these two cavefish species are 2.88 and 2.61, respectively. A maximum size was recorded for S. jii.
      PubDate: 2016-10-04T07:32:09.377082-05:
      DOI: 10.1111/jai.13224
  • Length–weight relationships for 15 fish species of the Xun Jiang
           River in Guangxi, China
    • Authors: J. Li; A.-L. Wang, X.-H. Li, S.-L. Zhu, Z. Wu
      Abstract: Length–weight relationships (LWRs) were estimated for 15 species belonging to four orders and five families from the Xunjiang River, China. Exponent b varied from 2.364 to 3.634, and r2 values varied from .914 to .991. This is the first LWR report in the area for these species, seven species of which are published for the first time.
      PubDate: 2016-10-04T07:32:08.254906-05:
      DOI: 10.1111/jai.13155
  • Range-wide assessment of pallid sturgeon Scaphirhynchus albus (Forbes &
           Richardson, 1905) relative condition
    • Authors: K. D. Steffensen; G. E. Mestl, Q. E. Phelps
      Abstract: Pallid sturgeon Scaphirhynchus albus relative condition has been observed to be declining along the Nebraska reach (rkm 1212.6–801.3) of the Missouri River over the past several years; therefore, pallid sturgeon capture data was synthesized from the entire Missouri and Middle Mississippi rivers to document and compare how pallid sturgeon condition varies spatially and temporally throughout much of their current range. The study area was subdivided into four river reaches based on a priori statistical differences for pallid sturgeon catches from 2003 to 2015. Pallid sturgeon in the Middle Mississippi River (Alton Dam [rkm 321.9]) to the confluence of the Ohio River (rkm 0.0) were in the best condition while pallid sturgeon in the Middle Missouri River (Fort Randall Dam [rkm 1416.2]) to the Grand River confluence (rkm 402.3) were in the poorest condition. Furthermore, pallid sturgeon condition in the Upper Missouri River (Fort Peck Dam [rkm 2850.9] to the headwaters of Lake Sakakawea [rkm 2523.5] and lower Yellowstone River) and the Lower Missouri River (Grand River confluence to the Mississippi River confluence [rkm 0.0]) were significantly less than in the Middle Mississippi River but significantly higher than the Middle Missouri River. Temporally, pallid sturgeon condition was highly variable. Relative condition in the Middle Mississippi River was consistently above average (Kn = 1.1). Comparatively, Kn throughout the Missouri River rarely exceeded “normal” (Kn = 1.0), with Kn in the middle and lower reaches of the Missouri River having declined to the lowest observed. As pallid sturgeon recovery efforts continue, understanding the range-wide differences and effects on condition could be critical, as poor condition may cause maturation delays, reproductive senescence or even mortality, which affects the likelihood of natural reproduction and recruitment.
      PubDate: 2016-10-04T07:32:07.138675-05:
      DOI: 10.1111/jai.13206
  • Length–weight and length–length relationships for 23 fish species of
           Porto Primavera reservoir, Upper Paraná River, Brazil
    • Authors: H. Marques; A. B. Nobile, J. H. P. Dias, I. P. Ramos
      Abstract: The study presents length–weight relationships (LWR) and length–length relationships (LLR) for 23 fish species captured in the Porto Primavera Reservoir, Upper Paraná River. Seventeen of the LWRs and 20 of the LLRs are reported for the first time. New maximum standard lengths are presented for 17 species as well as weights for three species and new total weight records for 19 species.
      PubDate: 2016-10-04T07:32:03.411282-05:
      DOI: 10.1111/jai.13197
  • Effects of dietary protein/lipid ratio on growth performance, feed
           utilization and blood parameters of great sturgeon (Huso huso Linnaeus,
           1758) during the winter season
    • Authors: B. Falahatkar; P. Haghparast, B. Meknatkhah, M. Rahmati
      PubDate: 2016-10-04T07:32:00.616442-05:
      DOI: 10.1111/jai.13193
  • Length–weight relationships for two abundant rocky reef fishes from
           northern Patagonia, Argentina: Sebastes oculatus Valenciennes, 1833 and
           Pinguipes brasilianus Cuvier, 1829
    • Authors: L. A. Venerus; G. L. Villanueva Gomila, M. C. Sueiro, N. D. Bovcon
      Abstract: The Patagonian rockfish Sebastes oculatus and the Brazilian sandperch Pinguipes brasilianus are two of the most abundant, conspicuous reef fishes in the northern Patagonian gulfs of Argentina. This study provides separate length–weight relationships for males, females and pooled individuals of these species for the North Patagonian region, based on samples collected between 2009 and 2014 throughout the year between 42°S and 45°S. No length–weight relationships for P. brasilianus were heretofore available in the literature. Although one relationship was published for S. oculatus from Chilean waters, the limited number of fish and size range did not allow an accurate estimate of the model parameters.
      PubDate: 2016-10-04T07:31:53.666138-05:
      DOI: 10.1111/jai.13207
  • Swimming performance of adult bighead carp Hypophthalmichthys nobilis
           (Richardson, 1845) and silver carp H. molitrix (Valenciennes, 1844)
    • Authors: J. J. Hoover; D. P. Zielinski, P. W. Sorensen
      Abstract: Although the movement of invasive bighead carp (Hypophthalmichthys nobilis) and silver carp (H. molitrix) in the Upper Mississippi River system is dependent on their ability to swim through its numerous lock-and-dams, the swimming performance of adults of these species is at present unknown. Using a large (2,935-L) mobile swim tunnel, the swimming performance of adult bighead and adult silver carp was quantified at water velocities that challenged them to exhibit either prolonged and/or burst swimming (76–244 cm/s) with fatigue times of less than 10 min. Simple log-linear models best described the relative swim speed to fatigue relationships for both species. Under these conditions, the swimming performances of adult bighead and silver carp were similar to several species of adult fishes native to the Mississippi River system, but relatively low (
      PubDate: 2016-09-29T05:35:32.069108-05:
      DOI: 10.1111/jai.13199
  • Karyotype and genome size of an endangered cavefish (Triplophysa rosa Chen
           & Yang, 2005)
    • Authors: Y. Niu; Q. Zhao, H. Zhao, A. Ludwig, Z. Peng
      PubDate: 2016-09-26T02:06:29.082937-05:
      DOI: 10.1111/jai.13209
  • Reproduction of the internal inseminator Trachelyopterus galeatus
           (Linnaeus, 1766) (Siluriformes: Auchenipteridae)
    • Authors: D. M. Roriz Lemes; B. Vizioli, L. Marcon, N. Bazzoli
      Abstract: Studied was the reproductive activity of Trachelyopterus galeatus using microscopic analyses of gonads and biological indices. To evaluate the reproductive biology of T. galeatus, which is an important species in the Jequitinhonha River basin, Minas Gerais, Brazil, 254 males and 372 females were captured between May 2012 and April 2013 from the Irapé Reservoir using gillnets with meshes of various sizes. Average total length of males was 13.3 ± 2.1 and 14.3 ± 2.3 cm for females. Females were more abundant than males (1.4 females:1 male) in all total length classes. The reproductive peak of T. galeatus occurred between November and February, when the biological indices related to reproduction were highest and the physical‐chemical water parameters were most favourable for reproduction in this Neotropical environment. Trachelyopterus galeatus reproduces throughout the year and is a partial spawner.
      PubDate: 2016-09-26T02:06:27.597356-05:
      DOI: 10.1111/jai.13205
  • Energy acquisition and retention by age‐0 and age‐1 paddlefish
           Polyodon spathula (Walbaum, 1792) in relation to size, growth, and rearing
           conditions in two Great Plains reservoirs and hatchery ponds
    • Authors: R. J. Hemingway; D. L. Scarnecchia
      Abstract: The objective of this study was to investigate lipid accumulation and storage in age‐0 and age‐1 paddlefish Polyodon spathula (Walbaum, 1792) in relation to age, stock, year, and growth. Juvenile paddlefish were collected from three locations in North Dakota and Montana, USA, during July and August of 2011 and 2012 and proximate analysis was used to determine lipid content. RNA/DNA ratios were used as an index of growth rates. Differences in age‐based lipid accumulation and storage in juvenile paddlefish suggest a split allocation between growth and lipid storage, with growth being the highest initial priority and emphasis on energy storage occurring at a larger size, later in life. Differences in lipid allocation between stocks indicate that allocation is influenced by hatchery/wild rearing conditions. Differences within and between year‐classes are consistent with field evidence observed in 2012 of a strong 2011 year‐class, and indicate that during productive times, paddlefish may allocate energy to both body growth and lipid reserves, and that allocation differs among years. The lack of a relationship between RNA/DNA ratio and lipid does not support a physiologically exclusive allocation strategy between growth and lipid. Evidence from this and other studies suggests rather that an emphasis on growth, some energy storage, and a large rostrum size in relation to overall fish length in age‐0 and age‐1 fish, may be adaptive in avoiding predation while accruing necessary energy reserves for overwintering. Although this study also provides reference information regarding proximate composition of wild and hatchery origin juvenile paddlefish, much more study is needed into the relationships among growth, low and high lipid groups, lipid allocation in juvenile paddlefish as well as the existence and timing of allocation changes between growth and storage. To aid in understanding paddlefish survival and year‐class strengths, these relationships also need to be linked to inter‐annual differences in early rearing environments for age‐0 and age‐1 fish.
      PubDate: 2016-09-26T02:06:17.296268-05:
      DOI: 10.1111/jai.13200
  • Length–weight relationships for 36 deep‐sea fish in the
           Colombian Caribbean Sea
    • Authors: J. De La Hoz-M; J. Motta, J. Paramo
      Abstract: Length–weight relationships (LWR) for 36 deep‐sea fish species belonging to 22 families are provided. Samples were collected during 2009 by trawling with the sampling design stratified by depths ranging from 200 to 550 m in the Colombian Caribbean Sea. To the best knowledge of the authors, this study represents the first study on length–weight relationships for 17 species worldwide, as well as 13 new maximum lengths.
      PubDate: 2016-09-26T02:06:10.105883-05:
      DOI: 10.1111/jai.13217
  • Occurrence of the blackfin goosefish, Lophius gastrophysus (Miranda
           Ribeiro, 1915), in coastal waters of the San Jorge Gulf, Patagonia,
    • Authors: P. D. Cochia; N. D. Bovcon, J. Ruibal-Núñez, L. Villagran, L. Jerez
      PubDate: 2016-09-26T02:06:06.165304-05:
      DOI: 10.1111/jai.13221
  • Length–weight and length–length relationships for three Sillago
           species (Sillaginidae) from the Persian Gulf
    • Authors: M. S. Alavi-Yeganeh; S. N. Mirhadi, M. Nasri
      Abstract: This study investigates length–length and length–weight relationships of three Sillago species [Sillago arabica McKay & McCarthy (Memoirs of the Queensland Museum, 27, 1989, 551), Sillago attenuata McKay, 1985 and Sillago sihama (Forsskål, 1775)] captured in the Persian Gulf, Iran. A collection of 220 specimens was captured from August 2015 to January 2016 by cast net (mesh size: 10 mm) and beach seine (mesh size: 15 mm). The relationships of total length (TL) and standard length (SL) and the relationships between total length and body weight are given. This study presents the first reference on LWRs for two of the species (S. arabica and S. attenuata) in their range of distribution.
      PubDate: 2016-09-26T02:06:03.876841-05:
      DOI: 10.1111/jai.13223
  • Subcutaneous injection of visible implant elastomer in sterlet (Acipenser
           ruthenus Linnaeus, 1758): a study on compatibility and retention
    • Authors: A. Nastoll; B. Feneis, T. Ring, M. Schubert, H. Wedekind, J. Geist
      Abstract: The purpose of this study was to mark endangered sterlet (Acipenser ruthenus) with visible implant elastomer (VIE) in order to assess mortality, compatibility, retention, persistence and histological reactions resulting from this tagging technique. It was hypothesized there would be only minor effects on the fishes' health, and assumed that acute effects would be more pronounced than long‐term effects. On 11 September 2013, 20 specimens were tagged ventrally with visible implant elastomer, 20 received a subcutaneous injection with 0.9% NaCl solution, and another 20 served as untreated control. Mean total length was 28.0 ± 1.8 cm and mean body mass 64.1 ± 12.0 g. The sterlets were kept in four 4,000‐L tanks filled with 2,400‐L water. Acute effects were monitored for 95 days, where fish were held at temperatures between 2.4°C and 15.2°C, reflecting outdoor conditions. Chronic effects were examined 282 days post‐tagging through histological sections of the tagging region in five sterlets. During the first 95 days of observation, tag retention was 100%. No signs of incompatibility were detected. Body mass did not significantly differ between VIE‐tagged fish and controls. At day 282 post‐tagging, however, distinct tissue reactions were visible at the tagging sites of nine fish. Histological examination of five fish revealed a variable degree of infiltration with leukocytes in the areas around the elastomer, which did not necessarily correspond with the externally visible degree of inflammation. After medical treatment, the lesions healed without complications, whereas the retention rate of the VIE tags was 5%. According to the findings, the tag location rather than the tag itself was responsible for the externally visible irritations, indicating that the ventral subcutis of sterlet is not a suitable site, even for small VIE tags in long‐term studies. The results of this study also suggest that VIE marking should in general be critically evaluated before application in field studies.
      PubDate: 2016-09-23T23:20:36.862508-05:
      DOI: 10.1111/jai.13191
  • Effects of varying natural mortality and selectivity on the assessment of
           eastern Baltic cod (Gadus morhua Linnaeus, 1758) stock
    • Authors: J. Horbowy
      Abstract: In 2014, the International Council for the Exploration of the Sea (ICES) was unexpectedly unable to provide an analytical assessment of eastern Baltic cod stock; factors such as data issues, assessment methodology, and the ecological situation of cod were indicated as the reasons for this failure. Some evidence suggests that the natural mortality (M) of cod could increase substantially in forthcoming years and that the selectivity could change. In this paper, age‐structured and stock‐production assessment models were applied to simulate the dynamics of cod stock; in the models, both constant and increasing natural mortalities were permitted. In the age‐structured model, the effects of selectivity related to the cod size on the cod assessment were also analysed. In addition, stock with characteristics similar to Baltic cod stock and increasing natural mortality was generated and assessed with the age‐structured model using both constant and increasing M. It was shown that models with increasing natural mortality of cod in recent years perform much better than models with constant natural mortality in terms of the distribution of residuals and retrospective patterns. The models with size‐dependent selectivity did not perform better than other standard assessments. The assessment of generated stock (where natural mortality was increasing) with constant natural mortality in the assessment model showed a poor distribution of residuals and strong retrospective patterns, similar to the ICES assessment with constant M. The conducted simulations strongly suggest that the main reason for the poor recent cod assessment is the increase in natural mortality, which is not considered in the assessment methodology.
      PubDate: 2016-09-23T23:20:32.617788-05:
      DOI: 10.1111/jai.13202
  • Confirmed occurrence in the Mediterranean Sea of Mobula japanica (Müller
           & Henle, 1841) with a first record off the Turkish coasts
    • Authors: A. Sakalli; N. Yucel, C. Capapé
      PubDate: 2016-09-23T23:20:24.738487-05:
      DOI: 10.1111/jai.13218
  • Development and characterization of ten polymorphic SNP markers in
           growth‐related genes for the channel catfish, Ictalurus punctatus
           (Rafinesque, 1818)
    • Authors: S. Y. Zhang; X. H. Chen, M. H. Wang, L. Q. Zhong, Q. Qin, W. J. Bian
      PubDate: 2016-09-23T23:20:21.048593-05:
      DOI: 10.1111/jai.13194
  • On the occurrence of mirror carp, an aquaculture breed of Cyprinus carpio
           Linnaeus, 1758, in the Songhua River, the largest tributary of the Amur
    • Authors: F. Tang; A. Santos, M. Bessert, C. Lu, W. Liu
      PubDate: 2016-09-23T05:40:18.81842-05:0
      DOI: 10.1111/jai.13185
  • Length–weight relationships of three freshwater cyprinid fish species
           from Chalakudy River, South Western Ghats, India
    • Authors: C. R. Renjithkumar; K. Roshni, B. M. Kurup
      Abstract: This paper provides length‐weight relationships (LWRs) for three freshwater cyprinid fish species: Barbodes carnaticus (Jerdon, 1849), Hypselobarbus kolus (Sykes, 1839) and Tor khudree (Sykes, 1839) from the Chalakduy River in South Western Ghats of India. Fish samples were collected on a monthly basis between April 2011 to March 2012 using gill nets of different mesh sizes (3.5–10 cm). LWRs for these three species had not been previously reported in FishBase.
      PubDate: 2016-09-23T00:00:28.62825-05:0
      DOI: 10.1111/jai.13196
  • Length–weight and length–length relationships of five fish species in
           the Atrai River, Dinajpur, Bangladesh
    • Authors: M. R. Islam; M. J. Mia
      Abstract: A total of 502 specimens were obtained during monthly samplings from July to December 2015, by fishermen using seine nets, gillnets and cast nets. Length–weight (LWRs) and length–length (LLRs) relationships were estimated for five fish species collected from the Atrai River in the northwestern region of Bangladesh. The values of slope (b) in LWRs (r2 > .913, p  .897, p 
      PubDate: 2016-09-22T00:55:36.43387-05:0
      DOI: 10.1111/jai.13210
  • Agonistic trials with mirrors do not elicit the same aggressiveness of a
           real trial in the matrinxã fish, Brycon amazonicus (Spix & Agassiz, 1829)
    • Authors: M. Serra; C. P. B. Wolkers, M. M. M. Mello, E. C. Urbinati
      Abstract: This study tested the efficacy of mirror trials in studying aggressiveness in the matrinxã fish, Brycon amazonicus. The hypothesis was that a mirror would elicit an aggressive response in B. amazonicus juveniles, but show different behavioral and physiological profiles than those observed in trials with real opponents. Fish were tested using either a mirror trial (n = 7) or a real trial (n = 7), that is, placed alone with a mirror or paired with a same‐sized opponent, respectively. All trials lasted for 20 min and took place in 96‐L aquaria with water temperatures of 28°C. Fish in mirror trials exhibited less locomotion (mirror: 423.3 ± 39.1; real trial: 735.1 ± 31.9; p 
      PubDate: 2016-09-22T00:55:30.463537-05:
      DOI: 10.1111/jai.13198
  • Length–weight and length–length relationships of three endemic fish
           species from the Yarlung Tsangpo River, China
    • Authors: J. Shao; B. S. Ma, X. Yang, C. X. Xie, B. Huo, Q. W. Wei
      Abstract: The length‐weight (LWR) and length‐length relationships (LLR) were estimated for three endemic fish species, including Schizothorax waltoni Regan, 1905, Schizothorax oconnori Lloyd, 1908, and Schizothorax macropogon Regan, 1905 in the Yarlung Tsangpo River. A total of 399 specimens were collected using gillnets and cast nets during February to August 2012 and March to May 2013. No information regarding length–weight and length–length relationships was reported previously in FishBase for these three endemic species.
      PubDate: 2016-09-22T00:55:23.814276-05:
      DOI: 10.1111/jai.13195
  • Reproductive biology of Pseudoplatystoma corruscans (Spix and Agassiz,
           1829) and Pseudoplatystoma reticulatum (Eigenmann and Eigenmann, 1889),
           two species of fisheries importance in the Cuiabá River Basin, Brazil
    • Authors: E. Barzotto; M. Oliveira, L. Mateus
      Abstract: The aim of this study was to compare the reproductive processes of two large catfishes, Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum, from the Cuiabá River Basin. The reproductive process were assessed to: (i) characterizing the population structure and sex ratio; (ii) determining the reproductive period; (iii) estimating and quantify the nutritional status and energy reserves and their relationships with reproductive stages; and (iv) estimating the body length at first gonad maturation (TL50). Individuals were sampled monthly from July 2006 to February 2008 using gill nets, seine nets, hooks, casting nets and trotlines. In addition, 294 individuals were obtained from the artisanal fishery in the city of Cuiabá, Mato Grosso state, Brazil. Total lengths were greater for females for both species, with no significant difference in the sex ratio; growth was considered isometric, except for P. corruscans males. Peak reproductive activity was in December and January. Differences in the hepatosomatic index (HSI) in P. corruscans depended on the gender. In P. reticulatum the HSI did not differ between sexes or among developmental stages. For P. corruscans, the estimated mean total length at first maturity (TL50) was 62.92 cm, and for P. reticulatum 57.84 cm. Action to ensure the protection of the fish stocks should consider their reproduction processes, which are important for the equilibrium of these populations in the Cuiabá River, as well as for fisheries management.
      PubDate: 2016-09-22T00:55:22.910311-05:
      DOI: 10.1111/jai.13162
  • Length–weight relationships of seven fish species from a fish landing
           port at Sungai Udang, Penang, Malaysia
    • Authors: Y. G. Seah; Y. N. Chua, C. W. Sam, H. Y. Teoh
      Abstract: The length–weight relationships (LWRs) are described for seven fish species from four families (Ariidae, Clupeidae, Leiognathidae and Sciaenidae) inhabiting Penang waters. A total of 471 specimens were sampled and measured from 19 to 20 January 2015, using a bottom trawl net with a 38 mm mesh size of cod‐end. No information regarding LWRs was reported previously in FishBase for Cryptarius truncatus, Escualosa thoracata, Johnius carouna, Nuchequula blochii, Plicofollis argyropleuron, Secutor hanedai or Secutor megalolepis, and the study also provides a new FishBase record of maximum total length for Escualosa thoracata (10.6 cm), Secutor hanedai (9.1 cm) and Secutor megalolepis (7.5 cm).
      PubDate: 2016-09-20T03:45:47.857953-05:
      DOI: 10.1111/jai.13216
  • New record of Scomberesox scombroides (Richardson, 1843) (Beloniformes:
           Scomberesocidae) in southwestern waters of Patagonia and an update on its
           geographic distribution on the Argentine continental shelf
    • Authors: N. D. Bovcon; P. D. Cochia, J. Ruibal‐Núñez, J. J. Romero, M. E. Góngora
      PubDate: 2016-09-20T03:45:45.101998-05:
      DOI: 10.1111/jai.13208
  • Length–weight relationships of three fish species from the Yangtze
           River, China
    • Authors: X. Shi; W. Jiang, S. Ye, M. Duan, G. Liu, X. Hu, D. Liu
      Abstract: Length–weight relationships (LWRs) were determined for three endemic fish species [Gobiobotia filifer (Garman, 1912), Homatula potanini (Günther, 1896) and Xenophysogobio boulengeri (Tchang, 1929)] from the Yangtze River in China. Samples were obtained between April 2008 and June 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. Prior to this study, the LWRs for two species [Gobiobotia filifer (Garman, 1912) and Homatula potanini (Günther, 1896)] were unknown.
      PubDate: 2016-09-20T03:45:36.172048-05:
      DOI: 10.1111/jai.13182
  • Phytase can reduce theneedfor monocalcium phosphate supplementation in
           soybean and rapeseed meal‐based diets of black sea bream, Acanthopagrus
           schlegelii (Bleeker, 1854)
    • Authors: Y.‐B. Lu; S.‐D. Xu, Y.‐T. Liu, T. Zhang, H.‐F. Du, Q.‐H. Ai
      Abstract: A feeding trial was conducted to study the effect of partial replacement of dietary monocalcium phosphate (MCP) with phytase on growth performance, feed utilization and phosphorus discharge in black sea bream, Acanthopagrus schlegelii. In the feeding trial, the control diet (designated as P1.5) was prepared with 1.5% MCP but without phytase, and the three other diets (designated as PP1.0, PP0.5 and PP0, respectively) were supplemented with 1.0%, 0.5% and 0% MCP, respectively, along with 200 mg (400 U) phytase/kg diet in each. Each diet was tested in triplicate tanks and fish were fed twice daily to satiation. After an 8‐week feeding trial in indoor flow‐through cylindrical fibreglass tanks (25 fish per tank, initial body weight: 11.5 ± 0.12 g), fish fed with PP1.0 and PP0.5 had no significant change in weight gain (WG), specific growth rate (SGR), protein efficiency rate (PER) or feed conversion ratio (FCR) compared to the control (p > .05), whereas fish fed with PP0 showed a significantly lower growth performance in the above parameters (p 
      PubDate: 2016-09-19T00:16:12.816159-05:
      DOI: 10.1111/jai.13150
  • Two chemical marking procedures with Alizarin Red for piava Leporinus
           obtusidens (Valenciennes, 1837) juveniles
    • Authors: S. Hermes‐Silva; M. Roza de Abreu, E. Zaniboni‐Filho
      PubDate: 2016-09-14T08:24:05.577237-05:
      DOI: 10.1111/jai.13189
  • New record and range extension of the big‐scale sand smelt Atherina
           boyeri Risso, 1810 (Atherinidae) in the Devegecidi Dam Lake, Tigris River
           basin, Turkey
    • Authors: E. Ünlü; Ö. Gaygusuz, T. Çiçek, S. Bilici, B. W. Coad
      Abstract: The big‐scale sand smelt, Atherina boyeri, is recorded from the Devegecidi Dam Lake in 2016, the first record of this invasive species in the Tigris River basin, with potential to extend to all countries in the Middle East. The smelts were caught with a trawl net mesh size of 6 mm. The captured specimens are described and compared. Records of A. boyeri from Turkish inland waters are summarised from the literature.
      PubDate: 2016-09-14T08:24:04.373503-05:
      DOI: 10.1111/jai.13192
  • Length–weight and length–length relationships for four fish species
           from Talkhehrud River, Urmia Lake basin, Iran
    • Authors: Y. Keivany; M. Zamani‐Faradonbeh
      Abstract: Length–weight and length–length parameters were calculated in the Talkhehrud River, northwestern Iran, for four freshwater fish species belonging to two families. The b values varied between 2.27 and 3.19, with a mean ± SD of 2.2777 ± 0.387. The b parameter values in the length–weight relationship equations were determined as 2.73 for Alburnus atropatenae Berg, 1925; 3.19 for Alburnoides petrubanarescui Bogutskaya & Coad, 2009; 2.92 for Capoeta capoeta (Güldenstädt, 1773); and 2.27 for Oxynoemacheilus persa (Heckel, 1847). This study provides the first reference on the LWRs and LLRs for these species in the Talkhehrud River.
      PubDate: 2016-09-12T02:23:13.912697-05:
      DOI: 10.1111/jai.13187
  • Length–weight relationships for 19 labrid species from the southern
           Atlantic Ocean
    • Authors: G. C. Cardozo‐Ferreira; J.‐C. Joyeux
      Abstract: Length–weight relationships were estimated for 19 labrid species occurring in the southern Atlantic Ocean. Data were collected from 175 specimens between July 2013 and February 2014. Most specimens were obtained from ichthyological collections, but some were spear‐fished. Labridae is one of the most diverse and representative fish families in reef systems. Relationships are novel for 13 of the species, with the remainder representing an increase in their geographic extension or size range.
      PubDate: 2016-09-12T02:23:12.369068-05:
      DOI: 10.1111/jai.13179
  • Inter‐population plasticity in dietary traits of invasive bleak Alburnus
           alburnus (Linnaeus, 1758) in Iberian fresh waters
    • Authors: D. Latorre; G. Masó, A. Hinckley, F. Rubio‐Gracia, A. Vila‐Gispert, D. Almeida
      PubDate: 2016-09-12T02:23:00.792705-05:
      DOI: 10.1111/jai.13186
  • First record of the yellowbar angelfish Pomacanthus maculosus (Forsskål,
           1775) in the central Mediterranean (Maltese Islands)
    • Authors: J. Evans; E. Zammit, P. J. Schembri
      PubDate: 2016-09-12T02:22:27.182715-05:
      DOI: 10.1111/jai.13188
  • Length–weight relationships of four fish species from a coastal
           artisanal fishery, southern Bangladesh
    • Authors: M. A. B. Siddik; M. R. Chaklader, M. A. Hanif, M. A. Islam, R. Fotedar
      Abstract: This study presents the first report of length–weight relationships (LWRs) for Apocryptes bato (Hamilton, 1822), Salmophasia phulo (Hamilton, 1822), and Silonia silondia (Hamilton, 1822), excluding Anodontostoma chacunda (Hamilton, 1822), from fishermen's catches landed in a coastal artisanal fishery at Patuakhali, Southern Bangladesh. Specimens were sampled occasionally over a period of 1 year between August 2014 and September 2015. Fishes were collected from coastal fishermen using cast nets (mesh size
      PubDate: 2016-09-09T23:20:52.511809-05:
      DOI: 10.1111/jai.13181
  • Reproductive cycle of Triplophysa stenura (Herzenstein, 1888)
           (Balitoridae: Nemacheilinae) from the Yarlung Tsangpo River in the Tibetan
           Plateau, China
    • Authors: J. Y. Xie; Y. Xia, Y. Yan, W. T. Liang, C. Ren
      Abstract: The reproductive biology of Triplophysa stenura, an indigenous cyprinid species from the Qushui County in the middle of the Yarlung Tsangpo River in the Tibetan Plateau, China, was investigated by bimonthly sampling from May 2014 to April 2015 using electrofishing. The gonadosomatic index (GSI) of T. stenura differed significantly between males and females over the seasonal trend, indicating that spawning extends from March (shortly after the ice melts) to May, as observed for indigenous species in response to environmental conditions on the cold plateau. Average oocyte diameter was 0.66 ± 0.13 mm, whereby the oocyte diameter distribution exhibited a clear seasonal pattern as the temporal pattern of GSI. Absolute fecundity of T. stenura was 3999 eggs/individual, which increased significantly with the increase in fish size and gonad weight, demonstrating the relationship of an exponential equation between them.
      PubDate: 2016-09-09T23:20:48.821397-05:
      DOI: 10.1111/jai.13166
  • Length–weight relationships of three estuarine species in the Comacchio
           Lagoon, Po River delta, Italy
    • Authors: M. Lanzoni; A. Gavioli, V. Aschonitis, M. Merighi, E. A. Fano, G. Castaldelli
      Abstract: The length–weight relationships (LWRs) for three native fish species of the Comacchio Lagoon (northwestern Adriatic Sea, Italy) were determined. The species Zosterisessor ophiocephalus (Pallas, 1814), Pomatoschistus canestrini (Ninni, 1883) and Knipowitschia panizzae (Verga, 1841), were sampled monthly from 2010 to 2014. Both P. canestrini and K. panizzae are listed as protected species in the Habitat Directive and the Berne Convention and there is no information on their LWRs in FishBase.
      PubDate: 2016-09-09T23:20:43.847818-05:
      DOI: 10.1111/jai.13173
  • Length–weight relationship of Rhinobatos horkelii Müller & Henle, 1841
           and Zapteryx brevirostris (Müller & Henle, 1841) off Brazil, southwestern
           Atlantic Ocean
    • Authors: A. F. Pasquino; M. F. Martins, O. B. F. Gadig
      Abstract: This study reports the length–weight relationships (LWRs) for two elasmobranch species, Rhinobatos horkelii Müller & Henle, 1841 and Zapteryx brevirostris (Müller & Henle, 1841) collected from the southwestern Atlantic, off Brazil. Both are considered endangered species. The LWR data can be taken into consideration for further management and conservation plans.
      PubDate: 2016-09-09T23:20:42.846375-05:
      DOI: 10.1111/jai.13171
  • Hook performance and selectivity of Eurasian perch, Perca fluviatilis
           (Linnaeus, 1758) in the Åland Archipelago, Finland
    • Authors: S. B. Garner; K. A. Dahl, W. F. Patterson
      Abstract: The effects of two hook‐types (circle or J hook) fished with two different baits (red worms Eisenia spp., or cyprinid fishes) were examined for deep‐hooking, catch rate, mean total length, and selectivity of Eurasian perch, Perca fluviatilis, in the Åland Archipelago, Finland. The perch population available to hook‐and‐line gear was sampled with multipanel gillnets, with panels ranging from 10 to 60 mm in stretched mesh diameter. The effect of each hook then was examined for each bait by conditioning the size distributions of hook‐and‐line catches on the size distribution of perch collected with gillnets to estimate selectivity. The proportion of deeply‐hooked perch was 4.8 times greater for J hooks (0.21) than circle hooks (0.04) baited with worms and 3.7 times greater for J hooks (0.33) than circle hooks (0.09) baited with fish. Catch rates were significantly different between the two baits but not between the two hooks, with the greatest catch rate observed for the circle hook baited with worms. There was no significant difference in perch total length between the two hooks, but there was a significant difference between the two baits, with the fish bait catching significantly larger perch. Perch selection peaks between the two hooks differed by only 13.8 mm, but the selection peak with fish bait (236.4 mm TL) was 119.9 mm greater than the selection peak with the worm bait (116.5 mm TL). A substantially lesser incidence of deep hooking support the conservation benefits of circle hook use for perch, especially when catch‐and‐release is practiced. Using fish baits similar in size to those used in this experiment can avoid potentially harmful interactions between relatively small perch and anglers who place little importance on catch motives but whose satisfaction is still catch‐dependent.
      PubDate: 2016-09-02T08:15:27.319037-05:
      DOI: 10.1111/jai.13176
  • Length–weight relationships of three Gobiidae species from the Rupsha
           River in southwestern Bangladesh
    • Authors: M. Y. Hossain; A. K. Paul, M. A. Hossen, M. A. Islam, M. N. U. Pramanik, M. A. Islam, M. M. Rahman
      Abstract: This study reports the length–weight relationships (LWRs) of three Gobiidae fish species (Acentrogobius viridipunctatus, Apocryptes bato, and Odontamblyopus rubicundus) from the Rupsha River, southwestern Bangladesh. A total of 388 individuals were sampled using cast nets (mesh size ranges from 1.5 to 3.0 cm), gill nets (mesh size ranges from 2.0 to 3.0 cm) and square lift nets (mesh size ~1.5 cm) from December 2014 to November 2015. Allometric coefficient (b) values were 3.23 for A. viridipunctatus, 2.70 for A. bato, and 2.67 for O. rubicundus, respectively. The first LWRs records for these three Gobiidae species, they can be used online for FishBase as well as in future studies.
      PubDate: 2016-09-02T08:15:22.987837-05:
      DOI: 10.1111/jai.13183
  • Length–weight relationships of six tropical fish species from
           Chilika Lagoon, India
    • Authors: D. Panda; S. K. Karna, M. Mukherjee, R. K. Manna, V. R. Suresh, A. P. Sharma
      Abstract: The length weight relationships (LWRs) of six tropical fish species from Chilika Lagoon, India were studied. Specimens were caught using a wide range of fishing gear operated in the lagoon from January to December 2014. The fresh specimens were measured for total length and weight, then dissected and the sex confirmed. Previously unavailable in FishBase, the detailed LWRs of Daysciaena albida, Eleutheronema tetradactylum, Etroplus suratensis and Mystus gulio are reported for the first time. Maximum total lengths reported for Nematalosa nasus and Osteogeneiosus militaris in this study are new records for these species. The existence of a differential growth between male and female O. militaris was confirmed, which was not known earlier.
      PubDate: 2016-09-02T08:15:22.033636-05:
      DOI: 10.1111/jai.13174
  • Length–weight relationships of freshwater fishes of the Alto Madre de
           Dios River (Manu Biosphere Reserve, Peru)
    • Authors: I. Tobes; R. Miranda, A. Pino‐del‐Carpio, J. M. Araujo‐Flores, H. Ortega
      Abstract: The present work provides the estimates of morphometric relationships for 22 native freshwater fish species (11 Characidae, five Loricariidae, two Heptapteridae, one Astroblepidae, one Crenuchidae, one Curimatidae and one Erythrinidae) collected in the Alto Madre de Dios River (Cuzco and Madre de Dios, Peru) in June 2012 using a mobile backpack electrofishing unit. These are the first length–weight relationships reported for 24 species, mostly endemic to the Amazonian basin. Knowledge regarding these biometric relationships can be relevant in the management and conservation of the local fishes and fisheries.
      PubDate: 2016-09-01T04:15:25.880952-05:
      DOI: 10.1111/jai.13172
  • Estimation of migratory history in female masu salmon Oncorhynchus masou
           (Brevoort, 1856) with the growth hormone pseudogene
    • Authors: T. Yamamoto; K. Suzuki, T. Endo, S. Kitanishi
      Abstract: To estimate the migration timing, length, and location of females with the growth hormone pseudogene (GHp), trace element analyses were performed on the otoliths of 40 wild adult masu salmon, Oncorhynchus masou (12 males, 19 normal females, and nine females with GHp [all fish were 3‐ or 4‐years‐old]) caught during the reproductive season (September) from 2004 to 2010 in the Atsuta River in Japan. Sr concentrations at the end of the otolith translucent area formed during the winter suddenly increased in all individuals, suggesting that they had migrated in the spring. In addition, the estimated migration length and location of females with GHp indicated that they had spent a fixed period of 1 year in the ocean, suggesting that females with GHp have a similar migratory history as that of normal females.
      PubDate: 2016-09-01T04:15:23.596152-05:
      DOI: 10.1111/jai.13165
  • Length–weight relationships for three fish species from the Yalong
           River, southwestern China
    • Authors: W. Tang; C. Y. Sha, J. Q. Zhang, Q. Wang, W. Xiong, W. H. You
      Abstract: Length–weight relationships were determined for three fish species: Gymnodiptychus pachycheilus (Herzenstein, 1892), Discogobio yunnanensis (Regan, 1907), and Triplophysa pseudostenura (He, Zhang & Song, 2012). Samples were collected from the Yalong River, southwestern China using fishing gear (gillnets, 30 × 15 m, mesh‐size 5 mm) and electroshock fishing (CWB‐2000 P, 12 V, 250 HZ) in June 2007. Prior to this study, length–weight relationships for these three species were unknown. For two of the species [Discogobio yunnanensis (Regan, 1907) and Triplophysa pseudostenura (He, Zhang & Song, 2012)], new maximum standard lengths not yet reported in the scientific literature were noted.
      PubDate: 2016-08-30T03:45:46.35782-05:0
      DOI: 10.1111/jai.13177
  • First record of the Indo‐Pacific soldier bream Argyrops filamentosus
           (Valenciennes, 1830) from the Mediterranean Sea
    • Authors: M. Gürlek; D. Ergüden, S. Doğdu, C. Turan
      PubDate: 2016-08-30T03:45:24.534554-05:
      DOI: 10.1111/jai.13169
  • Length–weight relationship of six deep‐sea fish species from the shelf
           regions of western Bay of Bengal and Andaman waters
    • Authors: K. V. Aneesh Kumar; R. Thomy, K. P. Deepa, M. Hashim, M. Sudhakar
      Abstract: Length–weight relationships for six deep‐sea fish species inhabiting the shelf regions of the western Bay of Bengal and the waters of Andaman and Nicobar of India are presented. Samples were collected using high‐speed demersal trawl and expo demersal trawl nets at depths of 31–514 m in August and September 2010. The b values in the analyses ranged from 3.05 to 3.31, showing a mean and median value of 3.21 (SE ± 0.039, SD ± 0.097) and 3.2, respectively. Comparisons of b values with earlier estimations confirm the presence of spatial and temporal variations in the length–weight relations among the species. Coefficient of determination scores ranged from 0.94 to 0.97, indicating robustness of the samples analysed. This study provides the first estimates of length–weight relationships for four of the deep‐sea fishes, enriching the understanding of the growth patterns and population dynamics of these less‐studied deep‐sea fishery resources in Indian Ocean waters.
      PubDate: 2016-08-30T03:45:23.748321-05:
      DOI: 10.1111/jai.13164
  • Histopathological analyses of native silver catfish Rhamdia quelen (Quoy
           and Gaimard, 1824) immunized against and challenged with live theronts of
           Ichthyophthirius multifiliis
    • Authors: K. R. Tancredo; E. L. T. Gonçalves, M. L. Martins
      Abstract: As an alternative to treating with chemicals, immunization using Ichthyophthirius multifiliis as a vaccine has been studied in fishes that were often affected with white spot diseases also to understand the possible changes to the tissue caused by the vaccine. The focus of this study was the analysis of the influence of immunization via intraperitoneal injection (i.p.) and via immersion bath (im.b.) on the histopathology of R. quelen after being challenged with live theronts of I. multifiliis distributed in: control (non‐immunized and non‐challenged); non‐immunized and challenged with 12,000 theronts/fish; non‐immunized and challenged with 22,000 theronts/fish; immunized and challenged with 12,000 theronts/fish; immunized and challenged with 22,000 theronts/fish. Water quality was measured in each assay, with 300 fingerlings distributed among 15 tanks with 20 fish in each of three replicates. Six days after challenge, samples for histopathological and parasitological analyses were collected. In both i.p. and im.b. fish the prevalence of I. multifillis in the gills was higher in the non‐immunized fish (33.33% and 27.77%, respectively). Melanomacrophages were present in 53% of the samples of i.p. non‐immunized fish. Fish im.b. immunized and challenged showed more atrophied areas in the hepatocytes. Higher numbers of melanomacrophages in the i.p. non‐immunized fish kidneys were observed compared to control. The results showed no difference in the gill lesions of either immunized or non‐immunized fish compared to control. Histological alterations in the organs of silver catfish were considered light, except in the liver that presented significant atrophy and hypertrophy of hepatocytes after immunization via i.p.
      PubDate: 2016-08-27T02:35:36.298327-05:
      DOI: 10.1111/jai.13161
  • Length–weight and length–length relationships of three Ambassid fishes
           from the Ganges River (NW Bangladesh)
    • Authors: M. Y. Hossain; M. A. Hossen, M. N. U. Pramanik, Z. F. Ahmed, M. A. Hossain, M. M. Islam
      Abstract: Length–weight relationships (LWRs) and length–length relationships (LLRs) are presented for the first time for three Ambassid fish species from the Ganges River, northwestern (NW) Bangladesh. Fish were sampled with traditional fishing gear including cast net (mesh size ranges from 1.0 to 2.0 cm), gill net (mesh size ranges from 1.5 to 2.5 cm), square lift net (mesh size ~ 1.0 cm) and conical and box trap, October 2014 to September 2015. Allometric coefficient (b) values were 3.00 for Chanda nama, 3.10 for Parambassis lala and 3.23 for Parambassis ranga, respectively. Additionally, the LLRs were highly significant with r2 ≥ .958. The present observations would be an effective tool for their stock assessment in the Ganges River, NW Bangladesh and surrounding ecosystems.
      PubDate: 2016-08-27T02:35:24.066694-05:
      DOI: 10.1111/jai.13170
  • Length–weight relationships of 15 fish species in wetland areas of
           coastal southern Brazil
    • Authors: C. Marques Assumpção; F. Corrêa, F. M. Quintela, D. Loebmann
      Abstract: Herein are the length–weight relationships of 15 fish species from wetland areas of the coastal region in southern Brazil. In 2010, fishes were sampled seasonally in four wetlands utilizing beach seine nets.
      PubDate: 2016-08-27T02:35:21.857197-05:
      DOI: 10.1111/jai.13167
  • Length–weight relationship of nine fish species from Skadar Lake
           (Adriatic catchment area of Montenegro)
    • Authors: D. Milošević; D. Mrdak
      Abstract: This study provides data on the length–weight relationships (LWR) of nine fish species sampled between 2010 and 2014 from Skadar Lake, Montenegro. Also provided are the first comprehensive data of LWRs for three freshwater fishes for which no LWR information was available in the FishBase data bank. The b parameter values ranged from 2.936 to 3.271, while values of the a parameter ranged from 0.002 to 0.014.
      PubDate: 2016-08-26T23:45:42.068313-05:
      DOI: 10.1111/jai.13163
  • Length–weight relationships of five Gobiidae species from Bohai Bay,
    • Authors: H.‐L. Xu; D.‐X. Gu, R. Wang, H.‐L. Qi, L. Guo, X.‐T. Qiao
      Abstract: Length–weight relationships (LWR) for five Gobiidae species collected by trawl net in Bohai Bay, China, were determined. Parameter b in the LWR was 2.871, 2.664, 2.901, 3.237 and 2.882 for Amblychaeturichthys hexanema, Synechogobius ommaturus, Odontamblyopus rubicundus, Tridentiger barbatus and Paratrypauchen microcephalus, respectively. This is the first report in FishBase for the fitted LWRs of three of the Gobiidae species mentioned above.
      PubDate: 2016-08-08T10:03:43.930058-05:
      DOI: 10.1111/jai.13149
  • Issue Information
    • First page: 807
      PubDate: 2016-09-09T07:09:23.570253-05:
      DOI: 10.1111/jai.12887
  • Atlantic sturgeon Acipenser oxyrinchus Mitchill, 1815 seasonal marine
           depth and temperature occupancy and movement in the Bay of Fundy
    • Authors: J. W. Beardsall; M. J. W. Stokesbury, L. M. Logan‐Chesney, M. J. Dadswell
      First page: 809
      Abstract: Pop‐up satellite archival tags were used to collect fisheries‐independent data that characterized the seasonal habitat occupancy and movement of Atlantic sturgeon Acipenser oxyrinchus Mitchill, 1815 in the Bay of Fundy (BoF). Atlantic sturgeon from Canadian and United States stocks aggregate annually for feeding in Minas Basin, inner BoF (45.28N, 64.18W), during May to September but depart to other locations from October to April. Sixteen PSAT tags were applied to sturgeon ranging from 152 to 203 cm total length captured and released in Minas Basin during May to August. Ten of the tags were reported after 1 year at large and provided pop‐off locations. Seven were recovered with archived data, or provided transmitted data sets, which were analyzed for depth and temperature occupancy from June 2011 to August 2013. During June to August while in the Minas Basin the sturgeon spent >90% of time at depths
      PubDate: 2016-08-30T03:46:00.509202-05:
      DOI: 10.1111/jai.13175
  • Comparative coelomic fluid composition of sterlet sturgeon Acipenser
           ruthenus Linnaeus, 1758, Siberian sturgeon Acipenser baerii Brandt, 1869,
           and Russian sturgeon Acipenser gueldenstaedtii Brandt & Ratzeburg, 1833
    • Authors: M. A. M. Siddique; H. Niksirat, O. Linhart
      First page: 820
      Abstract: The objectives of this study were to compare the physicochemical properties of coelomic fluid (CF) in three sturgeon species, sterlet sturgeon Acipenser ruthenus (age 5–8 years), Siberian sturgeon Acipenser baerii (age 15–20 years), and Russian sturgeon Acipenser gueldenstaedtii (age 13–18 years). For the study, CF was collected by plastic pipette from the eggs of mature female sterlet sturgeon (N = 10), Siberian sturgeon (N = 7) and Russian sturgeon (N = 4); osmolality, pH, ionic composition (Na+, K+, Ca2+, Mg2+, Cl−), glucose, cholesterol and total protein of the CF were then analyzed. Mean concentration of K+ (4.4–6.11 mmol/L), Cl− (89.8–98.0 mmol/L), Ca2+ (0.87–0.96 mmol/L), Mg2+ (0.57–0.67 mmol/L), cholesterol (0.13–0.16 mmol/L), total protein (2.41–3.57 g/L), pH (7.92–7.98), and osmolality (190–213 mOsm/kg) of CF were not significantly different among these three species. However, the mean concentration of Na+ was significantly lower in sterlet sturgeon (104.6 ± 7.7 mmol/L; p 
      PubDate: 2016-08-30T03:45:20.427512-05:
      DOI: 10.1111/jai.13184
  • Effects of dietary prebiotic GroBiotic®‐A on growth performance, plasma
           thyroid hormones and mucosal immunity of great sturgeon, Huso huso
           (Linnaeus, 1758)
    • Authors: M. Adel; S. Nayak, C. C. Lazado, S. Yeganeh
      First page: 825
      Abstract: The present study was conducted to evaluate the effects of Grobiotic®‐A, a commercial prebiotics, when administered in feed on the growth performance, plasma thyroid hormones and mucosal immunity of great sturgeon (Huso huso). The commercial prebiotic mixture was supplemented in the diets at four different levels (i.e. 0.0% as control, 0.5%, 1% and 2%, in three replicates, 20 fish per replicate) and fed to the fish for an 8‐week period wherein 240 fish were cultured in 1,800‐L fiberglass tanks that formed part of a flow‐through system. Water temperature was maintained at 20.4 ± 1.5°C. Significant changes in growth performance parameters were observed, but only in those groups fed with 1% and 2% prebiotics. Specifically, marked improvements relative to the control group were observed in percentage weight gain, body weight gain, feed conversion ratio and specific growth rate in prebiotic‐fed fish. The levels of plasma thyroid hormones, specifically thyroxine and thyroid stimulating hormones were significantly elevated in the group receiving 2% prebiotics. Activities of lysozyme and alkaline phosphatase in skin mucus were significantly enhanced in prebiotics‐fed groups, particularly at an inclusion level of 1% and higher (2% group compared to the control). Inhibitory activity of the skin mucus against pathogens, particularly Streptococcus iniae and Yersinia ruckeri, was significantly improved following prebiotic feeding. Taken together, dietary inclusion of GroBiotic®‐A promoted growth, modulated thyroid hormones, and enhanced mucosal immunity of H. huso. This prebiotic mixture has the potential for use in improving the growth performance and health status of farmed great sturgeon.
      PubDate: 2016-08-11T01:12:34.048148-05:
      DOI: 10.1111/jai.13153
  • Changes in smolt traits of Atlantic salmon (Salmo salar Linnaeus, 1758)
           and linkages to parr density and water temperature
    • Authors: E. Jokikokko; E. Jutila, I. Kallio‐Nyberg
      First page: 832
      Abstract: Smolt traits (length, age) and timing of smolt migration of wild Atlantic salmon, Salmo salar L., were investigated in the Simojoki River, northern Baltic Sea. The aim was to determine whether they responded to changes in parr length, parr density and temperature from 2000 to 2014. Annual electrofishing surveys and smolt numbers determined parr densities by springtime trapping in the river mouth. During the smolt trapping period captured parr and smolts were aged from scales. Water temperature was measured daily. Mean length decreased from 137 mm (TL) to 129 mm among 2‐year‐old smolts, and from 150 mm to 139 mm among 3‐year‐olds. Median date of the smolt migration was 10 days earlier, from early June to late May during the study period, linked to the rise in air temperature in May at the nearby Kemi‐Tornio airport. However, the median day temperature and the mean daily water temperatures during the second (Q2) and third (Q3) migration quartiles did not change. This implied that migration began when a suitable water temperature was reached, independent of the date.
      PubDate: 2016-06-18T02:10:28.533255-05:
      DOI: 10.1111/jai.13113
  • Development of the digestive tract in first feeding larvae of Betta
           splendens Regan, 1910
    • Authors: R. C. Silva; F. N. Valentin, M. C. F. Paes, F. Faustino, L. G. Giannecchini, P. H. O. Viadanna, N. F. Nascimento, J. B. K. Fernandes, L. S. O. Nakaghi
      First page: 840
      Abstract: The aim of this study was to analyse the development of the digestive tract of Siamese fighting fish larvae (Betta splendens Regan, 1910), from hatching to 92 hours post‐hatching (hph) at 28.0°C, in order to determine the most appropriate time to begin exogenous feeding (live feed) and to investigate the digestive tract and its function during larval development. At hatching (29 hours post‐fertilization), the digestive tract was a simple and straight undifferentiated tube lined by a single layer of columnar epithelial cells; the mouth and anus were closed. At 18 hph, the mouth was open. At 32 hph, the tongue was located in the depression of the buccopharyngeal cavity floor and supported by basal cartilage. Goblet cells were present in the epithelium lining the pharynx and oesophagus. At 56 hph, the midgut had four distinct layers: the mucosa with typical villi, the submucosa, the smooth muscle layer, and the serosa. Histological analysis revealed that the larvae retained endogenous yolk reserves until 74 hph. Lipid accumulation was observed in the liver, which coincided with complete yolk absorption. At this time, the digestive tract was fully open and functional. Thus, it can be concluded that live feed should be given to B. splendens larvae from 74 hph onward, when the larvae are able to consume the food provided. This study also provides useful data for the improvement of husbandry techniques and for the formulation of diets specific to ornamental fish larvae.
      PubDate: 2016-07-26T02:15:42.421098-05:
      DOI: 10.1111/jai.13127
  • Influence of juvenile stunting on grow‐out performance of rohu,
           Labeo rohita (Hamilton, 1822)
    • Authors: P. C. Das; S. S. Mishra, B. Mishra, P. Jayasankar
      First page: 848
      Abstract: Rohu Labeo rohita juveniles stunted for 2, 4, 6, 8 10 and 12 months at 20 and 40 m−3 densities were subsequently cultured for 1 year in six grow‐out earthen ponds each 0.09 ha. Each pond was stocked with juveniles stunted for a particular duration (treatment) at a combined density of 8,000 ha−1 from two density groups at a 1:1 ratio. Electronic tags were implanted in 20 juveniles of each density group in all treatments as sub‐samples to track fish growth per individual. Another grow‐out study evaluated the growth of a fresh batch of rohu juveniles against similar sized but stunted 12‐month‐old juveniles, stocked together at 8,000 ha−1 density (1:1). Thirty juveniles from each group in this pond were tagged. After the year‐long grow‐out phase, survival (85.6%–96.3%) showed a positive correlation with the juvenile stunting duration. The study revealed a minimal influence of stunting density on juvenile growth in a subsequent grow‐out phase when they were stunted up to 8 months. But a higher stunting density (40 m−3) favoured growth in juveniles stunted for longer periods (>8 months). Growth curves of the lower and higher stunting density groups as well as “all rohu populations” in the treatments showed convergence with those of control (2 months stunted) only in the 4‐month stunted juveniles. The growth convergence in this treatment was achieved within 6 months of culture and subsequently surpassed that of control to over‐compensate at the end of 12 months of culture. No such compensatory growth (CG) response was observed in the 6‐ to 12‐month stunted rohu, because the growth curves run almost parallel to each other. The study also revealed juvenile stunting for more than 6 months delayed the initiation of the growth recovery process in the stunted individuals during their subsequent grow‐out phase. In the second study, identical growth trajectories of the fresh batch and the year‐long stunted juveniles reaffirmed a non‐existence of CG activity in the later. Such results indicate that juvenile stunting in rohu for 6 months and beyond does not lead to a better fish yield or economic gain to farmers, but rather adds to the investment costs because of the need for more feed and maintenance during stunting.
      PubDate: 2016-07-13T01:20:36.489788-05:
      DOI: 10.1111/jai.13131
  • Validation of annulus formation in sagittal otoliths of three tropical
           cichlids Oreochromis andersonii (Castelnau, 1861), Oreochromis macrochir
           (Boulenger, 1912), and Coptodon rendalli (Boulenger, 1896)
    • Authors: R. A. Peel; G. C. Taylor, O. L. F. Weyl
      First page: 859
      Abstract: The periodicity of growth zone formation in sagittal otoliths of Oreochromis andersonii, Oreochromis macrochir and Coptodon rendalli from the Upper Zambezi region, southern Africa, was validated to test the hypothesis that a single growth zone is deposited annually. Edge analysis was carried out on 754 O. andersonii (54–492 mm TL), 601 O. macrochir (83–438 mm TL) and 622 C. rendalli (45–379 mm TL) caught between August 2010 and August 2011 in Lake Liambezi and the Kavango, Kwando and Upper Zambezi rivers. This was corroborated for O. andersonii (n = 17) and C. rendalli (n = 16) using a fluorochrome marking experiment conducted in a large earthen pond (625 m2, 1.5 m deep) adjacent to the Kavango River. Both methods demonstrated that growth zone deposition occurred annually in juvenile and adult fishes. For edge analysis, the highest proportion of otoliths with an opaque margin was observed in summer from October to December. The fluorochrome marking experiment, however, revealed that opaque zone deposition took place in winter between June and September when water temperatures were lowest (17°C), indicating a lag between opaque zone deposition and detection on the otolith edge.
      PubDate: 2016-06-11T00:30:33.419553-05:
      DOI: 10.1111/jai.13110
  • Effect of age, size and digestive tract development on weaning
           effectiveness in crucian carp, Carassius carassius (Linnaeus, 1758)
    • Authors: B. Łączyńska; K. Palińska‐Żarska, J. Nowosad, M. Biłas, S. Krejszeff, T. Müller, D. Kucharczyk, D. Żarski
      First page: 866
      Abstract: The study aim was to determine the optimum age, wet body weight (WBW) and total length (TL) of the crucian carp, Carassius carassius (L.), to ensure the effectiveness of weaning directly without a gradual transfer from live food to a compound feed. Moreover, the state of development of the digestive tract was analyzed histologically based on the height of enterocytes. Experimental rearing was conducted between days 5 and 45 post hatch (DPH). Initial WBW of fish was 2.2 ± 0.6 (n = 30) mg and TL 6.1 ± 0.1 (n = 30) mm. Rearing was carried out at 27 ± 0.5°C, with fish divided into six groups: one control (C) fed with Artemia sp. nauplii, and five groups initially fed with Artemia sp. but later replaced by a compound feed. Weaning with the compound diet started at 15, 20, 25, 30 and 35 DPH in groups labeled F15, F20, F25, F30, F35, respectively. Larvae were fed three times per day (08.00 h, 13.00 h, 18.00 h) in equal portions (4% of larvae biomass per day, converted to the dry matter of the feed). Daily biomass growth was adopted as 15%. Each group was triplicated (n = 50 individuals per replicate). Highest values of TL 42.1 ± 0.7 (n = 30) mm and WBW 905.3 ± 50.3 (n = 30) mg were recorded in the control group at 45 DPH; lowest survival rate of 45 DPH was in group F15 (90.7 ± 1.2%, n = 30). The highest value of the enterocyte epithelial length was observed in individuals within groups F30, 34.8 ± 1.2 μm (n = 30) and F35, 35.4 ± 3.6 μm (n = 30), respectively, 30 and 35 DPH; highest percentage of deformations on the final day of the experiment was in group F15 (100 ± 0.0%, n = 30). The results indicate that an effective direct transfer from live food to prepared diets (with no gradual transfer) cannot be performed with crucian carp larvae before 30 DPH at 27°C, when the fish have reached TL = 31.1 ± 0.4 mm (n = 30) and WBW = 436.9 ± 13.7 mg (n = 30).
      PubDate: 2016-06-25T02:35:38.689232-05:
      DOI: 10.1111/jai.13100
  • Naming Moroccan fish: when diversity faces standardisation imperatives
    • Authors: H. Masski; A. Ait Hammou
      First page: 873
      Abstract: The Moroccan national fisheries information system aims at adopting a standard list of common names for fishery products. Thus, the goal of this study is to provide a means structuring vernacular names, which, although in wide use, are highly variable and do not necessarily meet trade requisites. The 138 species considered in this study have 691 vernacular names – an average of five names per species. Large disparities in the number of vernacular names were found between species and among the 16 study sites. Much of this variability is due to pronunciation and syllable adjunction, which do not affect the root name structure. Pronunciation aside, for the most part the analysed variability in vernacular names of fishes is of linguistic origin stemming from four geographic – and thus cultural – groups. The Iberian names, preponderant in the eastern Moroccan Mediterranean, decreased southward in favour of Arabic, Amazigh and French. According to these results, the adoption of a unique standard, if even possible, might encounter resistance to dissemination by the fishermen and local populations. The adoption of two names lists, one for the Moroccan Mediterranean and one for the Moroccan Atlantic, may be a good compromise. Most efforts at standardisation should then be invested at fish markets in order to integrate fish identification and labelling processes prior to selling.
      PubDate: 2016-06-03T03:45:28.515544-05:
      DOI: 10.1111/jai.13098
  • Does diet variation determine the digestive tract length of Capoeta
           banarescui Turan, Kottelat, Ekmekci and Imamoglu, 2006'
    • Authors: S. Akin; H. Turan, N. Kaymak
      First page: 883
      Abstract: This study tested the spatial variations in the digestive/intestine tract length of Capoeta banarescui, with regard to their diets in different habitats. Highly varied diets observed in a previous study within the same river system posed the question whether this flexibility is reflected in the digestive tract and intestine length of the species in the Yeşilırmak River, Turkey. Totals of 382 specimens (standard length 4.6–19.1 cm) were captured by electro‐fishing along the river in September 2012 at 11 locations spanning elevations from 34 to 992 m. The stomach, intestine and total digestive tract lengths were measured, and stomach contents analysed from 196 specimens. For statistical analyses, the stomach, intestine and total digestive tract length were expressed as percentages of total weight and standard length. The data provided evidence that the digestive tract and intestine lengths varied significantly among locations in association with the diet. Fish having dominantly carnivorous diets (e.g. chironomid larvae/invertebrates) in two locations had significantly shorter intestines and digestive tracts than those with diets dominated by benthic algae and other plants. The data indicated that C. banarescui showed broad flexibility in their feeding habits. Feeding heavily on plant materials might lead to the development of longer digestive tracts, increasing the active surface area for digestion; alternatively, there may be less invested in development of the digestive tract when feeding primarily on carnivorous diets where the respective digestive enzymes are readily available. The data suggest that phenotypic plasticity in the digestive tract length of C. banarescui is associated more with the abundant protein‐rich carnivorous food sources in the studied habitats. Whether this digestive tract plasticity has a genetic background remains to be verified in future studies.
      PubDate: 2016-06-04T00:55:31.775557-05:
      DOI: 10.1111/jai.13104
  • Eumetazoan parasites of two marine fish species from Baja California,
           Mexico: Sebastes miniatus (Jordan & Gilbert, 1880) and Caulolatilus
           princeps (Jenyns, 1840)
    • Authors: M. A. Rodríguez‐Santiago; J. A. Rosales‐Casián, M. I. Grano‐Maldonado
      First page: 893
      Abstract: It is hypothesized that two fish species sharing a same demersal habitat might show a similar community of parasites. The aim of this study was to compare the parasite community component of of two marine fishes on the northwest coast of México of economical interest, the vermilion rockfish Sebastes miniatus and the ocean whitefish Caulolatilus princeps. From February to December 2005, 210 specimens of S. miniatus (85–550 mm total length TL) and 91 C. princeps (85–550 mm TL) were obtained from the San Quintín sportfishing catch, at Pacific Baja California. Skin, eyes, fins and gill cavity were examined in situ, and their internal organs removed for later analysis, including a portion of flesh. In S. miniatus, 12 parasite taxa were identified as belonging to Monogenea, Digenea, Cestoda, Nematoda, Acanthocephala and Copepoda; the stomach, pyloric caeca, and intestine (digestive tract) were the most parasitized organs with seven of the 12 species. In S. miniatus, the most abundant parasite was Parabothriocephalus sagitticeps (80.8 individuals/host ± 33.4 SE: standard error), highest prevalence was Microcotyle sebastis (92.6%), and the highest average intensity of infection was the cestode P. sagitticeps (190.4 ± 48.1 SE). The C. princeps showed six species belonging to Monogenea, Digenea, Nematoda and Copepoda; the digestive tract presented the greatest infestation, with four of the six species recorded. The most abundant nematode was Hysterothylacium aduncum (16.5 ± 3.5 individuals/host), the main prevalent species was Anisakis sp., and the highest value of infection intensity was by Hatschekia sp. The nematodes Anisakis sp. and H. aduncum were shared between the two host fishes, and are a zoonotic risk to humans if the fishes are not cooked properly.
      PubDate: 2016-05-28T01:10:29.543606-05:
      DOI: 10.1111/jai.13093
  • Growth, parasitic infection and hematology in Colossoma macropomum Cuvier,
           1818 fed diets containing Allium sativum
    • Authors: L. A. K. A. Inoue; P. Oliveira Maciel, E. Gusmão Affonso, C. Lima Boijink, M. Tavares‐Dias
      First page: 901
      Abstract: The aim of this study was to investigate the effects of a dietary Allium sativum (garlic) addition on growth, parasite infestation and blood parameters in Colossoma macropomum (tambaqui) using 12 net‐cages (1 m3). There were four treatments with three replicates each (15 fish per replicate). Tambaqui of 112.4 g mean weight were fed for 45 days with diets containing 0, 15, 30 and 45 g of fresh garlic kg−1 feed. Garlic did not affect the tambaqui survival, growth, feed conversion, body condition, plasma glucose levels, total plasma protein levels or red blood cells. Total leukocyte and lymphocyte numbers decreased in fish fed diets containing 45 g garlic kg−1 feed, but neutrophils decreased in fish fed diets containing 15, 30 and 45 g garlic kg−1 diet, while the number of immature leukocytes increased in fish fed 30 g and 45 g garlic kg−1diet. Gills in fish fed 30 and 45 g kg−1 diet had lower infestation (52% and 63%, respectively) of Anacanthorus spathulatus (Monogenea) compared to controls. The application of garlic in diets improved the response of leukocytes and enhanced the resistance to infections by monogeneans.
      PubDate: 2016-04-15T07:14:02.225047-05:
      DOI: 10.1111/jai.13086
  • Liver alteration and hematological and serum biochemical responses of
           common carp, Cyprinus carpio Linnaeus, 1758, following long‐term feeding
           of pistachio (Pistacia vera) green hull extract as a source of natural
    • Authors: J. Motamedi‐Tehrani; E. Ebrahimi‐Dorcheh, P. Malekpouri, S. A. H. Goli
      First page: 906
      Abstract: This study was conducted to investigate the effect of pistachio green hull extract (PGHE) on hematological and serum biochemical changes in common carp, Cyprinus carpio. Three hundred common carp (11.65 ± 1.65 g) were fed one of five different dietary treatments (with three replications) containing 0, 0.5, 1.5, 4.5 or 9 g PGHE kg−1diet for ten continuous weeks. Each tank had a 90‐L capacity and water flow rate of about 500 ml min_1.Total phenolic compounds of the different diets differed significantly (P 
      PubDate: 2016-05-31T02:15:55.109081-05:
      DOI: 10.1111/jai.13095
  • Modulating effect of a magnetic field on Saprolegnia parasitica, Coker,
           1923 infecting trout (Salmo trutta, L.) eggs
    • Authors: A. Korzelecka‐Orkisz; K. Formicki, J. Szulc, A. Tański, K. Mazurkiewicz‐Zapałowicz, M. Twarużek, J. Grzonka, K. J. Kurzydłowski
      First page: 913
      Abstract: The aim of study was to investigate the effects of static magnetic fields [1 mT (miliTesla), 5 and 10 mT] on Saprolegnia parasitica growth, development, and cytotoxicity in the infection of trout eggs in hatcheries under laboratory and industrial conditions. The egg envelope (SEM) structures resulting from infection with and development of S. parasitica are also presented. S. parasitica mycelium was cultured on a microbiological medium SDA in Petri dishes (4 ± 0.2°C, 97% humidity) exposed to a magnetic field and in a control, to assess the mycelium growth rate. Effects of the magnetic field on cytotoxicity of S. parasitica after a 21‐day incubation on SDA medium were analyzed using the colorimetric cytotoxicity test MTT. Eggs of brown trout Salmo trutta were infected with S. parasitica by inoculum and incubated in glass vessels (4 ± 0.2°C) in a magnetic field and a control. The degree of mycelium invasion of the egg envelopes and the percentage of egg mortality were recorded daily thoughout the period of embrionic development. The magnetic field effects on brown trout eggs infected by wild strains of fungus‐like organisms (FLO) in the hatchery (4°C ± 0.1) were also investigated. Changes in the structure of brown trout egg envelopes as a result of infection and development of S. parasitica were examined in a FIB/SEM. The effects of magnetic fields of 5 and 10 mT on slowing the growth of mycelium of S. parasitica in vitro were also observed. Determining biochemical properties of S. parasitica also showed the effects of the magnetic field in differentiating the cytotoxicity. All magnetic field values showed a distinct decrease from medium to low values of S. parasitica cytotoxicity; the most effective reduction was observed at 5 mT. Magnetic fields in all tested levels slowed development of the mycelium on the incubated trout eggs, resulting in a decrease in the number of eggs infected by S. parasitica and thus permitting a greater hatching success. Similar effects were observed in other hatching conditions where eggs were also exposed. No negative effects of magnetic field treatment on the condition of the newly‐hatched larvae were observed. The SEM and FIB (Focused Ion Beam) analyses revealed penetration of S. parasitica via radial canals of the envelope. The magnetic field had no effect on the structure of hyphae or sporangia of S. parasitica, but did affect the growth rate of mycelium on the egg surface.
      PubDate: 2016-06-08T02:41:40.869275-05:
      DOI: 10.1111/jai.13099
  • Longline selectivity for white‐spotted conger Conger myriaster
           (Brevoort, 1856) in Haizhou Bay, China
    • Authors: Y.‐L. Tang; G‐J. Fang, P. Sun, F. Tian, G.‐R. Qi, F. ‐F. Zhao, R. Wan
      First page: 923
      Abstract: Conger myriaster is one of the most commercially important fish stocks in the Haizhou Bay, China. As the type of longline fishing hook has a significant effect on its capture, three hook sizes (nos. 302, 303, 304) were compared in experiments conducted along the Haizhou Bay from September to November 2012. C. myriaster selectivity analysis using the different hook widths was obtained by analysing the catch rate, CPUE, total length distribution and selection curves. The log‐normal model equation was used to explore the longline selection, and anova was employed to analyse the difference in catch rate and CPUE among the three hook sizes. The longline selectivity for C. myriaster was well described by a log‐normal model equation. Hook no. 303 proved to have the highest catch rate, CPUE, and the estimated model lengths within three types of hooks tested in the experiments, in accordance with the fact that no. 303 is also the favourite hook used by local fishermen. Overall, the present study indicates that hook no. 303 has the best selection and is an appropriate size for sustainable utilisation of C. myriaster.
      PubDate: 2016-06-25T02:35:27.836538-05:
      DOI: 10.1111/jai.13114
  • The influence of feeding behaviour on growth of Atlantic cod (Gadus
           morhua, Linnaeus, 1758) in the North Sea
    • Authors: K. Hüssy; N. G. Andersen, E. M. Pedersen
      First page: 928
      Abstract: The objective of this study was to resolve key mechanisms driving individual growth patterns of Atlantic cod (Gadus morhua). Growth dynamics were analysed by linking growth patterns with stomach content composition and environmental temperature. Samples were collected in August/September of the years 2009, 2010 and 2011 in the north‐eastern part of the central North Sea. Prey selection was assessed by identification of individual prey items in the stomach content to species. Ten feeding groups were identified consisting of individuals with one prey type dominating their stomach contents (≥75% by mass), of which six were used for growth analyses: “Sandeel”, “Clupeids”, “Norway pout”, “Flatfishes”, “Crustaceans” and “Brittle stars”. For each group, growth patterns were estimated based on measures of otolith growth increments. The stomach contents showed that cod as a species are opportunistic in their prey selection, but at the same time indicated that the total, broad feeding niche width of the population is dominated by individual diet specialization and that many individuals temporally show a preference for a particular prey type. The contribution of invertebrates and particularly crustaceans decreased with increasing cod size, whereas that of fish and predominantly herring increased. Prey type had a significant effect on growth, while temperature had no effect. Slowest growth was observed in the cod group preying on sandeel, while cod preying on Norway pout showed the fastest growth. No significant difference was observed between groups preying on brittle stars, crustaceans, flatfishes and herring. Growth in the year before capture did however not differ between any of these groups. Across sampling years, growth chronology patterns were similar but not significantly influenced by temperature.
      PubDate: 2016-08-19T04:25:43.564186-05:
      DOI: 10.1111/jai.13160
  • Effect of cellulase, phytase and pectinase supplementation on growth
           performance and nutrient digestibility of rainbow trout (Oncorhynchus
           mykiss, Walbaum 1792) fry fed diets containing canola meal
    • Authors: N. O. Yigit; E. Keser
      First page: 938
      Abstract: This experiment was conducted to evaluate the effects of supplementing exogenous enzymes on growth, feed conversion ratio (FCR) and apparent nutrient digestibility in rainbow trout (Oncorhynchus mykiss) fry diets containing 32% canola meal. Five experimental diets (including a control diet containing no enzymes) were prepared as isonitrogenous (44% crude protein) and isocaloric (4000 kcal DE kg1). The four other diets contained either cellulase, phytase, pectinase or an enzyme mix (a mixture of cellulase, phytase and pectinase in the same ratio). The feeding trial was conducted in triplicate for 12 weeks in 15 tanks (100‐L). At the beginning of the experiment 20 rainbow trout fry (initial weight 1.23 g) were stocked into each tank. Mean water temperature in the rearing tanks was 11°C and water flow in each tank was 6 L min−1. At the end of the experiment the growth parameters and FCR displayed no significant differences in enzyme supplementation (P > 0.05). In addition, no differences were observed in dry matter, protein, or lipid digestibility with enzyme supplementation (P > 0.05). The results of this study showed that the addition of pectinase, phytase, cellulase or an enzyme mix to a diet containing 32% canola meal had no effect on growth, feed efficiency or dry matter, protein, or lipid digestibility in rainbow trout fry.
      PubDate: 2016-04-15T07:14:24.909273-05:
      DOI: 10.1111/jai.13088
  • Seasonal changes in sex ratio and size‐related sex reversal of the
           protogynous hermaphroditic bluespotted seabass Cephalopholis taeniops
           (Valenciennes, 1828)
    • Authors: M. P. V. Costa; L. A. Sampaio, R. B. Robaldo, J. C. B. Cousin
      First page: 943
      Abstract: Seasonal changes in sex ratio and size‐related sex reversal of the protogynous hermaphroditic Cephalopholis taeniops were studied from histological and population data of 218 individuals captured by hook and line, July 2009–November 2012, in Cape Verde archipelago. This study showed that C. taeniops have a diandric protogynous hermaphrodite sexual model, with young individuals undergoing bisexual development and hermaphrodites above 28 cm. All gonads had a bisexual immature stage with primary and secondary males. Primary males possibly originate from immature bisexual individuals, whereas secondary males likely result from females that have already reproduced and changed sex.
      PubDate: 2016-05-30T00:15:45.788219-05:
      DOI: 10.1111/jai.13094
  • Lack of mtDNA variation among remote middle Volga and upper Ural brown
           trout suggests recent and rapid recolonization
    • Authors: S. Marić; O. Askeyev, A. Askeyev, S. Monakhov, N. Yanybaev, I. Askeyev, D. Galimova, A. Snoj
      First page: 948
      Abstract: Brown trout populations from the middle Volga and upper Ural drainages in the Russian Federation were analyzed with respect to their inter‐relationships and phylogenetic status using complete mtDNA control region sequences and 10 microsatellite loci. Among 56 individuals from eight populations (six from the middle Volga and two from the upper Ural drainages) only one haplotype was detected: Iran1 from the Danube phylogenetic lineage. This haplotype is very frequent in the southern Caspian basin in Iran. Given the high diversity of haplotypes in northern Iran, in contrast to the complete domination of the Iran1 haplotype in our study, it seems likely that Iran1 reached the middle Volga and upper Ural drainages as a consequence of colonization from the southern Caspian basin. In contrast to the mtDNA analysis, a more pronounced differentiation was observed among the studied populations on the basis of microsatellite DNA data. Based on this result, it is proposed that each population should be treated as a distinct management unit in the context of future conservation activities.
      PubDate: 2016-06-30T06:20:26.446-05:00
      DOI: 10.1111/jai.13126
  • Survival and growth of early life stages of leaf fish (Monocirrhus
           polyacanthus, Heckel 1840) cultured under different stocking densities and
           live food densities
    • Authors: F. M. Ramos; H. A. Abe, R. Y. Fujimoto
      First page: 954
      Abstract: The objective of this study was to evaluate the effects of different live foods, (Artemia sp. and Moina minuta), and different stocking densities on the larval rearing success of the leaf fish, Monocirrhus polyacanthus. A completely randomized factorial design (3 × 3; three replicates) was used. Two subsequent experiments were performed for each live food, using three food densities (100, 200 and 300 prey per larva) and three stocking densities (10, 15 and 20 larvae L−1). Fish were fed twice a day. Water quality parameters pH (4.08–4.02), dissolved oxygen (3.7–3.6 mg L−1), temperature (27.9–27.8°C), conductivity (147.2–127.4 μs cm−1) and total ammonia (0.78–0.38 μg L−1) were determined. Weight gain, specific growth rate (SGR), body mass, relative condition factor and survival were evaluated. The water quality was influenced by the live food and stocking densities. Fish fed M. minuta showed better weight gain, specific growth ratio (SGR), biomass gain, relative condition factor and survival than in the other treatment. Artemia sp. showed no improved influence on the larvae performance subjected to different treatments. The beneficial role in growth and survival of leaf fish larva when fed with M. minuta is discussed.
      PubDate: 2016-05-31T02:15:22.213801-05:
      DOI: 10.1111/jai.13092
  • The effect of triiodothyronine on survival, growth and metamorphosis of
           yellowtail clownfish Amphiprion clarkii (Bennett, 1830) larvae
    • Authors: Y. M. B. Contrera; R. M. C. Eugênio, D. Z. Damasceno, R. A. Bombardelli, M. Y. Tsuzuki
      First page: 960
      PubDate: 2016-06-20T05:45:46.669676-05:
      DOI: 10.1111/jai.13116
  • Early identification of hybrids of Indian major carp, Labeo rohita and
           Catla catla using nuclear marker‐based multiplex PCR
    • Authors: M. Mohanty; P. Jayasankar, L. Sahoo, P. Das, B. Kumar Das, D. K. Verma, P. Routray
      First page: 963
      PubDate: 2016-06-20T05:45:48.087133-05:
      DOI: 10.1111/jai.13111
  • New record of two established populations of Lepomis cyanellus Rafinesque
           (1819) (Centrarchidae) from the state of Querétaro, Central Mexico
    • Authors: G. Mariscal‐de‐Souza; O. Carbajal‐Becerra, J. P. Ramírez‐Herrejón, M. Martínez, R. Pineda‐López
      First page: 966
      PubDate: 2016-06-25T02:35:33.376691-05:
      DOI: 10.1111/jai.13112
  • Extending depth record of hornyhead turbot Pleuronichthys verticalis
           Jordan and Gilbert, 1880 from the Gulf of California, Mexico
    • Authors: C. H. Rábago‐Quiroz; J. López‐Martínez, E. Herrera‐Valdivia
      First page: 970
      PubDate: 2016-07-16T00:06:03.334721-05:
      DOI: 10.1111/jai.13121
  • Description of burrowing behaviour of the pipefish Syngnathus abaster
           Risso, 1827 in the Ria Formosa lagoon, Portugal
    • Authors: C. Müller; K. Erzini
      First page: 973
      PubDate: 2016-07-16T00:06:08.788583-05:
      DOI: 10.1111/jai.13122
  • First record of greenback horse mackerel, Trachurus declivis (Jenyns,
           1841) in the Mediterranean Sea
    • Authors: M. Gurlek; D. Erguden, S. A. Dogdu, C. Turan
      First page: 976
      PubDate: 2016-08-27T02:35:26.604974-05:
      DOI: 10.1111/jai.13159
  • Unusually high production of oocytes in two invasive populations of
           topmouth gudgeon Pseudorasbora parva (Temminck and Schlegel, 1846)
    • Authors: K. Švolíková; E. Záhorská, V. Kováč
      First page: 978
      PubDate: 2016-06-18T02:15:46.265208-05:
      DOI: 10.1111/jai.13107
  • Length–weight relationships of three schizothoracinae fish species from
           the Niyang River, a branch of the Yarlung Zangbo River, Tibet, China
    • Authors: H. P. Liu; S. W. Ye, Z. J. Li
      First page: 982
      Abstract: The focus was on the length–weight relationships of three schizothoracinae species endemic to Tibet, including Schizothorax oconnori Lloyd, 1908, Ptychobarbus dipogon (Regan, 1905) and Schizopygopsis younghusbandi Regan, 1905, all of which are characterized by slow growth, late maturation and vulnerability to the environment (Ma et al., 2010, 2012; Duan et al., 2014). Among them, Schizothorax oconnori is an endangered fish and listed in the China species Red List (Wang and Xie, 2004, 2009). Samples were obtained by drift net fishing (mesh size 2 cm × 3 cm; 50 m net length) in November 2008. The r2 value was 0.94, 0.97, 0.98 and the b value 3.51, 3.12, 3.16, representing Schizothorax oconnori, Ptychobarbus dipogon, and Schizopygopsis younghusbandi, respectively.
      PubDate: 2016-06-25T02:35:22.953544-05:
      DOI: 10.1111/jai.13115
  • Length–weight and length–length relationships of seven fish species
           from Irtysh River and its tributaries, northwest China
    • Authors: Z.‐M. Zhang; C.‐X. Xie, H.‐P. Ding, C.‐J. Liu, P. Xie, Y. Guo
      First page: 986
      Abstract: Length–weight and length–length relationships are reported for seven fish species belonging to four families and seven genera from the Irtysh River and its tributaries, northwest China. A total of 1,351 individuals were collected using three layers of drift gill nets (inner mesh size 13 cm, outer mesh size 26 cm), set gillnets (mesh size 2.5 cm), and purse net (mesh size 1 cm) on a monthly basis from April to October 2013. One length–weight relationship, five length–length relationships, and two maximum lengths are presented for the first time in FishBase. This biometric data and their relationships are relevant to the management and conservation of local fishes and fisheries.
      PubDate: 2016-07-07T02:20:24.931791-05:
      DOI: 10.1111/jai.13129
  • Length–weight relationships of five fish species from an Atlantic
           coastal drainage in Brazil
    • Authors: J. L. Gasparini; L. C. Gomes, R. M. Macieira
      First page: 989
      Abstract: Length–weight relationships (LWR) are presented for five fish species from the Restinga de Maricá, southeastern Brazil. Specimens were caught in pools and streams with different types of fishing gear: seine net, dip net, and sieve. The LWRs of three species are new for this region, and of Phalloptychus januarius are published for the first time.
      PubDate: 2016-07-12T01:55:35.760182-05:
      DOI: 10.1111/jai.13132
  • Length–length and length–weight relationships for four endemic
           Cyprinid species in Küçük Menderes River Basin, Turkey
    • Authors: S. V. Yerli; M. Korkmaz, F. Mangıt
      First page: 991
      Abstract: Length–length and length–weight relationships were studied for four endemic Cyprinid species from the Küçük Menderes River Basin located in the Western Anatolian region of Turkey. Fish were sampled from Tahtalı and Beydağı reservoirs, Bulgurca, Şaşal and Azmak streams during 2013–2014, using multimesh gillnets in the reservoirs and by electrofishing in the streams. First records of length–weight relationships for Barbus pergamonensis Karaman, 1971, Squalius kosswigi (Karaman, 1972) and Petroleuciscus smyrnaeus (Boulenger, 1896) are reported in addition to three new maximum total lengths for Chondrostoma holmwoodii (Boulenger, 1896), Squalius kosswigi (Karaman, 1972) and Petroleuciscus smyrnaeus (Boulenger, 1896).
      PubDate: 2016-07-18T01:10:57.48651-05:0
      DOI: 10.1111/jai.13133
  • Length–weight and length–length relationships of five Mystus species
           from the Ganges and Rupsha rivers, Bangladesh
    • Authors: M. Y. Hossain; M. A. Hossen, M. N. U. Pramanik, S. Sharmin, F. Nawer, S. M. A. Naser, A. H. Bahkali, A. M. Elgorban
      First page: 994
      Abstract: This study focused on the length–weight and length–length relationships of five Mystus species from Bangladesh. A sum of 398 individuals (Mystus bleekeri = 47, Mystus cavasius = 171, Mystus gulio = 59, Mystus tengra = 65, and Mystus vittatus = 56) was collected from the Ganges and Rupsha rivers, Bangladesh. Fishes were caught by gill net (mesh sizes: 2.0–4.0 cm) and cast net (mesh sizes: 1.5–3.0 cm) from July 2014 to June 2015. Total length (TL), fork length (FL) and standard length (SL) were measured to 0.1 cm, while whole body weight (W) was taken to the nearest 0.1 g for each individual. The TL ranged from 6.0–13.5 cm for M. bleekeri, 5.0–15.0 cm for M. cavasius, 7.4–17.2 cm for M. gulio, 4.6–11.6 cm for M. tengra and 5.5–12.3 cm for M. vittatus. The W varied from 3.0–18.2 g for M. bleekeri, 1.3–30.4 g for M. cavasius, 6.1–62.2 g for M. gulio, 1.7–15.1 g for M. tengra and 2.7–19.2 g for M. vittatus. All LWRs were highly significant (p 
      PubDate: 2016-07-13T01:00:22.29139-05:0
      DOI: 10.1111/jai.13135
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