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Journal Cover   Journal of Applied Ichthyology
  [SJR: 0.482]   [H-I: 36]   [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  [1610 journals]
  • Weight–length relationships of six batoids in the Ecuadorian Pacific
    • Authors: A. F. Romero‐Caicedo; P. Loor‐Andrade, A. Cruz‐Martínez, M. Carrera‐Fernández
      Abstract: Weight–length relationships (WLR) were estimated for six batoids, namely: Urotrygon chilensis, Narcine entemedor, Rhinobatos leucorhynchus, Rhinobatos planiceps, Rhinobatos prahli and Urobatis tumbesensis captured in the Ecuadorian Pacific. Data were collected between October 2013 and August 2014 in two artisanal fishing ports. In addition, this represents the first WLR estimations for five of the species.
      PubDate: 2015-06-24T05:37:21.602512-05:
      DOI: 10.1111/jai.12829
       
  • Length–weight relationships for two marine fish species from the
           Gulf of Oman: Uranoscopus guttatus Cuvier, 1829 and Lagocephalus inermis
           (Temminck & Schlegel, 1850)
    • Authors: M. Salahi‐gezaz; S. Y. Paighambari, R. Abbaspour‐Naderi, M. J. Vesaghi
      Abstract: This study presents the first report of length–weight relationships (LWRs) for Uranoscopus guttatus and Lagocephalus inermis from the Iranian coast on the Gulf of Oman. A wide range of body lengths and weights were obtained using samples from non‐selective trawling surveys. The LWRs obtained were W = 41.408L3.519 and W = 16.525L2.847 for U. guttatus and L. inermis, respectively.
      PubDate: 2015-06-24T05:36:59.034986-05:
      DOI: 10.1111/jai.12821
       
  • Length‐weight relationships of 18 fish species from the Siluriformes
           order in a hydrographic subtropical basin in southern Brazil
    • Authors: F. Corrêa; E. F. Oliveira, J. Pouey, S. Piedras
      Abstract: The present paper describes the length–weight relationship of 18 fish species from the Siluriformes order in a subtropical basin, southern Brazil.
      PubDate: 2015-06-23T02:51:17.494799-05:
      DOI: 10.1111/jai.12822
       
  • Length–weight relationships of fish from Madeira River, Brazilian
           Amazon, before the construction of hydropower plants
    • Authors: A. Cella‐Ribeiro; M. Hauser, L. D. Nogueira, C. R. C. Doria, G. Torrente‐Vilara
      Abstract: Length–weight relationships (LWRs) are presented for 112 freshwater fish species representing 23 families and five orders captured in the Madeira River, the largest white‐water river tributary of the Amazon River. The allometry coefficient (b) of the LWR (Wt = aSLb) ranged from 2.446 to 3.856 with a median value of 3.102. Eight new LWR records are presented for Amazonian species as information for FishBase. LWRs in the present study provide historical data on a and b coefficients prior to the damming of the Madeira River in November 2011, allowing comparison estimates of predicted future population parameters as influenced by human intervention.
      PubDate: 2015-06-23T02:50:38.646599-05:
      DOI: 10.1111/jai.12819
       
  • Length–weight relationships of eight freshwater (Cypriniformes) fish
           species from Turkey
    • Authors: H. Ayyildiz; Y. Emre, A. Yagci, A. Altin
      Abstract: The length–weight relationships for eight freshwater fish species collected from Beyşehir Lake, Eğirdir Lake, Aksu River, Alara River, Göksu River and Menzelet Reservoir, were analysed. This paper represents the first LWR references for four of these species and also four of these species are endemic to Turkey.
      PubDate: 2015-06-23T02:34:50.423091-05:
      DOI: 10.1111/jai.12828
       
  • Length–weight relationship of two fish species from Poonch River,
           Western Indian Himalaya: Glyptothorax kashmirensis (Hora, 1923) and
           Crossocheilus diplochilus (Heckel, 1838)
    • Authors: N. K. Sharma; R. Singh, N. N. Pandey, M. S. Akhtar, J. I. Mir
      Abstract: This study provides the first report of length–weight relationships (LWRs) for two fish species, Glyptothorax kashmirensis and Crossocheilus diplochilus, collected from the Poonch River, one of the lesser tributaries to the Indus basin in India. New maximum length records are reported for both species.
      PubDate: 2015-06-23T02:33:43.209265-05:
      DOI: 10.1111/jai.12834
       
  • Length–weight relationships of two cyprinid fish species,
           Crossocheilus latius (Hamilton, 1822) and Garra gotyla gotyla (Gray, 1830)
           from the Ganga River Basin, India
    • Authors: N. K. Sharma; J. I. Mir, A. K. Dobriyal, R. Singh
      Abstract: This study provides length–weight relationship (LWR) information for two fish species (family Cyprinidae), Crossocheilus latius (Hamilton, 1822) and Garra gotyla gotyla (Gray, 1830), from a tributary of the Ganga River Basin, India. Both species had no previous LWR estimates as per Fishbase 2014.
      PubDate: 2015-06-23T02:03:17.034252-05:
      DOI: 10.1111/jai.12835
       
  • Relationship of otolith length to fish total length in six demersal
           species from the NW Mediterranean Sea
    • Authors: C. Viva; P. Sartor, D. Bertolini, S. De Ranieri, A. Ligas
      Abstract: Relationships between otolith major axis length (mm) and fish size (total length, cm) were described by means of linear regression analysis for six demersal fish species from the NW Mediterranean: blue whiting (Micromesistius poutassou), greater forkbeard (Phycis blennoides), red mullet (Mullus barbatus), poor cod (Trisopetus minutus capelanus), horse mackerel (Trachurus trachurus), and Mediterranean mackerel (Trachurus mediterraneus). Results show that reconstruction of body size from otolith measurement is possible by applying this approach based on the relationship of otolith length – fish length.
      PubDate: 2015-06-23T01:59:57.466906-05:
      DOI: 10.1111/jai.12838
       
  • Length–weight relationships for eight fish species from the Ravi
           River, north‐western India
    • Authors: N. K. Sharma; J. I. Mir, R. Singh, M. S. Akhtar, N. N. Pandey
      Abstract: Length–weight relationships (LWRs) were evaluated for Badis badis (n = 25), Sperata seenghala (n = 26), Labeo gonius (n = 34), Rasbora rasbora (n = 30), Bagarius bagarius (n = 24), Gagata cenia (n = 27), Glyptothorax stoliczkae (n = 24) and Channa orientalis (n = 28) from the Ravi River tributary in North India. Altogether 218 samples of eight species were obtained between May and November 2014 using cast nets and gill nets. LWRs for these species were unknown to FishBase, and new maximum lengths were recorded for two of these species.
      PubDate: 2015-06-23T01:58:12.510793-05:
      DOI: 10.1111/jai.12836
       
  • Length–weight relationship of Hyporthodus haifensis and Mycteroperca
           rubra (Pisces; Serranidae) from the North‐Eastern Mediterranean Sea,
           Turkey
    • Authors: Y. Özvarol; M. Gökoğlu
      Abstract: Length–weight relationships (LWRs) for Hyporthodus haifensis and Mycteroperca rubra were studied using longlines at depths of 5–150 m, in the Gulf of Antalya, northeastern Mediterranean Sea. Fishing operations were carried out daily with 15 fishing boats. A total of 170 individuals were sampled. The LWR relationships of Hyporthodus haifensis and Mycteroperca rubra were calculated as W = 0.009L3.142 (r2) = 0.996 and W = 0.0081L3.0652 (r2) = 0.989 P 
      PubDate: 2015-06-23T01:37:44.131595-05:
      DOI: 10.1111/jai.12837
       
  • Length‐weight relationships of 19 freshwater fishes from the
           Daechung Reservoir in South Korea
    • Authors: S.‐H. Baek; M.‐H. Jang, J.‐D. Yoon, J.‐H. Kim, S.‐H. Park, J.‐W. Lee, M.‐S. Byeon
      Abstract: The length‐weight relationships for nineteen freshwater fish species in the Daechung Reservoir, South Korea, were analyzed. LWR data for fourteen of these species were not yet listed in FishBase.
      PubDate: 2015-06-22T05:32:54.402137-05:
      DOI: 10.1111/jai.12767
       
  • Endocrine changes during the previtellogenic stage of the great sturgeon,
           Huso huso (Linnaeus, 1758)
    • Authors: B. Falahatkar
      Abstract: The study aimed to investigate changes in serum concentrations of sex steroids, thyroid hormones, stress indices, cholesterol, triacylglycerol, calcium and phosphorus, as well as the growth in the 3‐year old previtellogenic stage of great sturgeon, Huso huso over a 6‐month period. Forty individually marked fish (mean weight 6913 g) were divided among three circular tanks under a natural temperature and photoperiod. Every 1.5 months fish were weighed and blood samples taken for serum analysis. Fish showed significant changes in 17β estradiol, testosterone, triiodothyronine (T3), thyroxine (T4), adrenocorticotropic hormone, cortisol, cholesterol, and phosphorus, but not in triacylglycerol and calcium concentrations. From the January onset of the experiment to the end of the trial in July, there was a decrease in sex steroids and cortisol concentrations as well as a decline in T3 concentrations from March and in T4 from February to July. The mean weight of fish increased significantly from the beginning to the end of the experiment. Although the oocyte diameter increased from 197 to 202 μm, the difference was not significant. The histological data on oocytes suggest that the great sturgeon, like the other sturgeons, has a heterogeneous asynchronous ovarian development in the early stage of reproduction. This data might be useful to the further understanding of the physiology of Huso huso and/or to improve its culture. Moreover, it leads to a general increase in the understanding of the basic reproductive biology of this valuable chondrostean species.
      PubDate: 2015-06-20T02:01:46.130265-05:
      DOI: 10.1111/jai.12813
       
  • Documented predation of pallid sturgeon Scaphirhynchus albus (Forbes &
           Richardson, 1905) by flathead catfish Pylodictis olivaris (Rafinesque,
           1818)
    • Authors: K. D. Steffensen; S. A. Lundgren, T. W. Huenemann
      PubDate: 2015-06-17T07:16:21.191769-05:
      DOI: 10.1111/jai.12831
       
  • Increasing capture efficiency of pallid sturgeon Scaphirhynchus albus
           
    • Authors: R. J. DeVries; D. A. Hann, H. L. Schramm
      Abstract: This study evaluated the effects of environmental parameters on the probability of capturing endangered pallid sturgeon (Scaphirhynchus albus) using trotlines in the lower Mississippi River. Pallid sturgeon were sampled by trotlines year round from 2008 to 2011. A logistic regression model indicated water temperature (T; P 
      PubDate: 2015-06-17T07:15:34.371141-05:
      DOI: 10.1111/jai.12814
       
  • Length‐weight relationships of eight freshwater fishes from the
           Yangtze River and Lake Taihu, China
    • Authors: S. K. Tang; T. Q. Zhang, J. M. Lu, B. Q. Zhu, D. M. Li
      Abstract: The length‐weight relationships (LWRs) are presented for eight freshwater fish species (Acheilognathus macropterus, Saurogobio dabryi, Saurogobio gymnocheilus, Sinobdella sinensis, Pelteobagrus eupogon, Rhinogobius cliffordpopei, Neosalanx jordani, and Silurus meridionalis) from the Yangtze River and Lake Taihu. A total of 1044 specimens were sampled and measured between July 2012 and June 2014. Among the eight species, five species have no LWR estimates in FishBase.
      PubDate: 2015-06-17T07:15:12.443443-05:
      DOI: 10.1111/jai.12817
       
  • Ontogenetic changes in RNA, DNA and protein contents of Chinese loach,
           Paramisgurnus dabryanus (Dabry de Thiersant, 1872), larvae and juveniles
    • Authors: Y.‐L. Zhang; W.‐H. Hu, Q.‐W. Wu, F. Wang, Z.‐B. Zhao, H. He, R‐.P. Liu, Q.‐X. Fan
      Abstract: The changes in nucleic acid‐based indices and protein variables of Chinese loach, Paramisgurnus dabryanus, larvae and juveniles from hatching to 60 days after hatching (DAH) were conducted to assess its growth potential. The nucleic acid contents were analysed using a UV‐based method (n = 3, rearing temperature 24.4 ± 0.4°C, dissolve oxygen 7.1 ± 0.5 mg L−1, pH 7.9 ± 0.4). Ribonucleic acid (RNA) concentration significantly decreased from 2 to 5 DAH, then increased rapidly until 10 DAH, declining slightly thereafter. Deoxyribonucleic acid (DNA) concentration increased 2–5 DAH, decreased until 9 DAH, slightly increased again around 26 DAH, and then declined to a relatively stable level. Both RNA‐DNA and protein‐DNA ratios showed a statistically obvious relationship with growth rates. A significantly positive relationship was found between RNA‐DNA ratio and growth rates during the early life stage of Chinese loach. According to the results, growth of Chinese loach is characterized by rapid hyperplasia from hatching through completion of the yolk‐sac stage followed by continued rapid hyperplasia combined with increasing hypertrophy after feeding commences. The stage preceding 17 DAH of Chinese loach P. dabryanus is presumed to be critical for its survival and growth at 24°C.
      PubDate: 2015-06-17T07:14:12.872678-05:
      DOI: 10.1111/jai.12808
       
  • Diet of two commercially important shark species in the United Arab
           Emirates: milk shark, Rhizoprionodon acutus (Rüppell, 1837), and
           
    • Authors: R. W. Jabado; S. M. Al Ghais, W. Hamza, A. C. Henderson, A. A. Al Mesafri
      Abstract: The diets of the milk shark, Rhizoprionodon acutus, and the slit‐eye shark, Loxodon macrorhinus, landed from the artisanal fishery in the Arabian Gulf waters of the United Arab Emirates were investigated to determine their dietary preferences. Stomach contents from 57 milk sharks and 53 slit eye sharks were collected from Abu Dhabi (R. acutus, n = 23), Dubai (R. acutus, n = 5; L. macrorhinus, n = 15) and Ras Al Khaimah (R. acutus, n = 29; L. macrorhinus, n = 38) during fishery surveys from January to May 2012. Prey items were identified to the lowest possible taxonomic level, grouped into five categories including ‘teleost fish’, ‘cephalopods’, ‘crustaceans’, ‘invertebrates’, and ‘other’. The diets of both species were described using the numeric, frequency and weight methods, and the index of relative importance (IRI). The majority of stomachs for both species had food, with 66.6% of milk shark stomachs and 90.5% of slit‐eye shark stomachs containing prey items, both dominated by small teleosts. Rhizoprionodon acutus fed on a wide variety of teleost species, primarily Engraulidae (anchovies) (28%), Gerreidae (mojarras) (5.6%) and Carangidae (jacks) (1.6%) with occasional crustacean and cephalopod prey (8%). On the other hand, L. macrorhinus seemed to have a preference for one species in terms of teleosts (anchovies) (35.1%) and fed on a wider variety of crustaceans and cephalopods (22.6%). There was little overlap in the diets of these two species, suggesting that they may either be using different habitats or that in these waters, the milk shark is a generalist species while the slit‐eye is a specialist feeder.
      PubDate: 2015-06-17T07:13:51.019377-05:
      DOI: 10.1111/jai.12805
       
  • Evaluation of safflower meal as a protein source in diets of rainbow trout
           [Oncorhynchus mykiss, Walbaum, 1792)]*
    • Authors: S. Ustaoglu Tiril; M. Kerim
      Abstract: The effects of different levels of safflower meal (a residue of the plant oil extraction process) in diets of rainbow trout (Oncorhynchus mykiss) on growth performance, nutrient digestibility and body composition were investigated. Four different diets containing 0% (Control group), 10% (Diet 1), 15% (Diet 2) and 20% (Diet 3) safflower meal were formulated for the fish with a mean weight of 132.70 ± 0.75 g fed for 70 days. At the end of the experiment, there were no significant differences among dietary treatments for weight gain, specific growth rate and feed conversion ratio (P > 0.05). There were also no differences in the digestibility of crude protein and crude lipid between groups (P > 0.05). Supplementation of safflower meal in the diets also had no adverse effects on body composition. The results indicate that safflower meal is a promising feed ingredient and can be used up to a concentration of 20% in the rainbow trout diet with no adverse effects on growth performance, nutrient digestibility or body composition.
      PubDate: 2015-06-17T07:13:06.788489-05:
      DOI: 10.1111/jai.12807
       
  • Effect of avermectin (AVM) on the expression of γ‐aminobutyric
           acid A receptor (GABAAR) in Carassius gibelio (Bloch, 1782)
    • Authors: A. L. Zhou; K. Hu, J. M. Ruan, H. P. Cao, Y. Wang, Y. N. Zhao, X. L. Yang
      Abstract: This study describes the effect of avermectin (AVM) on the expression of γ‐aminobutyric acid A receptor (GABAAR) in Carassius gibelio. To assess the specific expression of GABAAR in the brain, gonads, liver, kidneys, heart, muscles, and skin of C. gibelio, the expression of GABAAR α1 subunit (GABAARα1) was measured by Western blotting. To study the effects of AVM on the expression of GABAAR, the median lethal concentration (LC50) at 24, 48, and 96 h of AVM was determined and the expression of GABAAR in the brain, liver, and kidneys of the corresponding C. gibelio evaluated by Western blotting and immunohistochemistry. The results show that GABAAR was expressed in the brain, gonads, liver, kidneys, heart, intestines, muscles, and skin, while primarily distributed in the central nervous system and moderately distributed in peripheral tissues. The expression of GABAAR in the brain, liver, and kidney tissues of C. gibelio was increased with the treatment of AVM at 24 h LC50, but attenuated by the treatment of AVM at 48 h LC50 and 96 h LC50. This suggests a threshold effect of AVM.
      PubDate: 2015-06-17T06:51:57.80356-05:0
      DOI: 10.1111/jai.12794
       
  • Development and characterization of 21 novel microsatellite markers for
           the Amur catfish (Silurus asotus Linnaeus, 1758)
    • Authors: M. Xie; F. Shao, Y. Zhang, Z. Peng
      PubDate: 2015-06-11T02:31:14.441209-05:
      DOI: 10.1111/jai.12815
       
  • Factors influencing three‐spined stickleback
           Gasterosteus aculeatus (Linnaeus 1758) catch per unit effort
    • Authors: J. Merilä
      Abstract: Different types of fishing gear are known to vary in catch per unit effort (CPUE), but little is known regarding this in respect to the three‐spined stickleback Gasterosteus aculeatus (Linnaeus 1758). The influence of the three‐spined stickleback CPUE by trap model, baiting and visual attractors was investigated. One trap type was found to out‐perform the other; however, baiting or attractors did not influence the CPUE. Hence, the results suggest that while the choice of trap type may have an impact on the three‐spined stickleback CPUE, baiting or attractors do not seem to improve the impact.
      PubDate: 2015-06-11T02:26:40.784256-05:
      DOI: 10.1111/jai.12810
       
  • Isolation and characterization of sixteen microsatellite loci for the
           rudderfish Kyphosus elegans (Centrarchiformes: Kyphosidae) from Easter
           Island, discovered with Next Generation Sequencing
    • Authors: C. Vega‐Retter; D. Véliz
      PubDate: 2015-06-11T02:26:20.06234-05:0
      DOI: 10.1111/jai.12812
       
  • Distribution, abundance and condition of invasive Ponto‐Caspian
           gobies Ponticola kessleri (Günther, 1861), Neogobius fluviatilis
           (Pallas, 1814), and Neogobius melanostomus (Pallas, 1814) in the Sava
           River basin, Croatia
    • Authors: I. Jakovlić; M. Piria, N. Šprem, T. Tomljanović, D. Matulić, T. Treer
      Abstract: Distributions, population densities, invasive potentials and adverse impacts of invasive Ponto‐Caspian gobies on native fauna in the Sava River basin remain unknown, whereby 23 locations in the Sava basin were sampled during a three‐year period (2011–2013). Among the five Ponto‐Caspian goby species previously reported in Croatia, only Neogobius fluviatilis (291), Neogobius melanostomus (177) and Ponticola kessleri (21) specimens were collected. Proterorhinus semilunaris and Babka gymnotrachelus were not found. N. fluviatilis was dominant among the invasive gobies at the majority of locations and almost omnipresent (apart from the upper Sava reaches) in the Sava basin. N. melanostomus was found only in the navigable Sava reaches, but its distribution range still seems to be expanding. The status of P. kessleri invasion remains unclear, as it was only found in 2011 at three locations in the lower Sava reaches. No significant (P > 0.05) increase in average catch‐per‐unit‐effort (CPUE) values was observed during the three‐year period. There is some evidence that a decline in Gobio gobio populations might be expected in response to increasing N. fluviatilis population densities. The findings suggest that further range expansions by the Ponto‐Caspian gobies can be expected in Croatia and the implementation of measures to limit their spreading should be considered.
      PubDate: 2015-06-11T02:17:33.18787-05:0
      DOI: 10.1111/jai.12803
       
  • Length‐weight relationship of 11 fish species from a tributary of
           the Amazon River system in northern Brazil
    • Authors: L. M. Abdon Silva; M. S. Brito Oliveira, A. C. Florentino, M. Tavares‐Dias
      Abstract: The length–weight relationships (LWRs) of 11 freshwater fish for eight families (Leporinus friderici, Pterophyllum scalare, Geophagus camopiensis, Curimata incompta, Astyanax bimaculatus, Tetragonopterus chalceus, Moenkhausia lepidura, Metynnis lippincottianus, Plagioscion squamosissimus, Hemiodus unimaculatus and Colomesus asellus) captured in tributary of the Amazon River system (Brazil) were investigated. These results represent the first reference on the LWRs for all 11 species in the eastern Amazon.
      PubDate: 2015-06-04T00:54:23.500601-05:
      DOI: 10.1111/jai.12791
       
  • Isolation and characterization of 15 novel microsatellite loci from an
           endangered bream Megalobrama pellegrini (Tchang, 1930)
    • Authors: W. Luo; K. Zhao, Y. Zhang, Z. Peng
      PubDate: 2015-06-03T02:01:29.417651-05:
      DOI: 10.1111/jai.12816
       
  • Reproductive biology and growth of bluestripe herring Herklotsichthys
           quadrimaculatus (Rüppell, 1837) in the northernmost waters
    • Authors: S. Oka; K. Miyamoto
      Abstract: In order to examine the reproductive biology and growth of Herklotsichthys quadrimaculatus in the northernmost part of its reproductive range, the size frequency, gonadal development, and otolith daily increments of this species were collected from the coastal waters of Okinawa Island, southern Japan. Juveniles (3.0) between March and August, which was the estimated spawning period. The modal hatching period back‐calculated from otolith daily increments was from April to May, which would be the peak of spawning. Because mature and spent ovaries also contained mature and immature oocytes, it was concluded that females spawn several times during the spawning season. Age determination from otolith increments showed logistic growth up to 97 mm (ca. 180 days post‐hatch), after which growth was almost stagnant. Maximum size and age were 121.6 mm SL and 384 days, respectively. The adult size decreased between August and September, indicating a change in the age cohort. Thus, the fish reached the end of their lifespans after spawning. Some of these ecological features were different from those of a previous study performed in southern areas; these differences suggest a flexible life history that could change to adapt to the surrounding environment.
      PubDate: 2015-06-03T01:58:13.094013-05:
      DOI: 10.1111/jai.12811
       
  • First record of Silurus glanis Linnaeus, 1758 in Portugal (Iberian
           Peninsula)
    • Authors: C. Gkenas; J. Gago, N. Mesquita, M. J. Alves, F. Ribeiro
      PubDate: 2015-06-03T01:57:47.274627-05:
      DOI: 10.1111/jai.12806
       
  • Reproductive biology of female cardinalfish, Epigonus crassicaudus de
           Buen, 1959
    • Authors: A. Flores; R. Wiff, E. Díaz, P. Gálvez
      Abstract: The cardinalfish (Epigonus crassicaudus) is a long‐lived and endemic deep‐water fish inhabiting the central and southern coast off Chile. Knowledge about basic biological attributes including maturity aspects is fragmentary in this species. The historical and comprehensive data available are applied to provide a detailed study of the reproductive biology of the female cardinalfish. The gonadosomatic index was computed from 5110 female gonads collected by onboard scientific observers between October 2000 and December 2012. A total of 1467 females gonads collected between March 2007 and December 2009 were subjected to histological analysis of maturation upon which a maturity ogive was estimated. The ovarian development of this specie is asynchronous, characterized by a continuous reproductive cycle in which reproductive activity is found throughout the year with a maximum during the austral autumn and summer (between May and June). Length at 50% maturity was estimated in 23.2 cm of fork length (95% CI: 21.7–23.9 cm). The results presented here are compared with previous sparse estimates available for this species.
      PubDate: 2015-06-03T01:53:50.942144-05:
      DOI: 10.1111/jai.12802
       
  • Characterization of hematological parameters and blood cells of cultured
           Gymnocypris eckloni Herzenstein, 1891
    • Authors: Y. Tang; X. Peng, J. Fang, H.‐M. Cui, Z.‐C. Zuo, J.‐L. Deng
      Abstract: The objective of the study was to obtain baseline data on haematological parameters, blood cell sizes and morphology in cultured male and female Gymnocypris eckloni Herzenstein, 1891. Forty‐eight healthy 3‐year‐old G. eckloni (26 males: 525.79 ± 48.56 g weight, 34.51 ± 1.88 cm total length; 22 females: 507.60 ± 54.48 g weight, 33.97 ± 1.84 cm total length) were used for this study. Both male and female gonadal maturity were at stage III (maturing). The fish were reared in 25–36 m2 outdoor tanks at dissolved oxygen 6.86 ± 0.48 mg L−1, pH 7.22 ± 0.58, temperature 12.40 ± 0.94°C and stocking density 50–80 fish m−3 during November 2014. The fish were fed commercial carp floating foods containing 35% crude protein three times daily. Haematological values were performed manually on heparin anticoagulated blood specimens using standard methods. The morphological features of blood cells and differential cell counts were done on Wright–Giemsa stained blood smears with no anticoagulants. Erythrocytes, leucocytes (neutrophils, eosinophils, lymphocytes and monocytes) and thrombocytes were distinguished and characterized under light microscope. The percentage of the different leukocytes revealed predominance of small lymphocytes (male: 62.31 ± 2.06%; female: 63.00 ± 2.25%) and nurophiles (male: 23.85 ± 1.51%; female: 23.49 ± 1.67%) followed by fewer monocytes (male: 4.81 ± 0.68%; female: 4.80 ± 0.77%) and few eosinophils (male: 3.73 ± 0.82%; female: 3.52 ± 0.67%). The nurophile percentages of each stage showed that metamyelocyte accounted for the most (male: 13.29 ± 0.88%; female: 13.07 ± 0.98%), followed by banded ones (male: 7.18 ± 0.49%; female: 7.00 ± 0.58%). The microstructure of G. eckloni blood cells was similar to that of other fish. Sex‐dependent differences for the erythrocyte counts, haemoglobin, haematocrit and mean corpuscular haemoglobin were found (P 
      PubDate: 2015-06-03T01:53:16.643648-05:
      DOI: 10.1111/jai.12798
       
  • Biological control of streptococcal infection in Nile tilapia Oreochromis
           niloticus (Linnaeus, 1758) using filter‐feeding bivalve mussel
           Pilsbryoconcha exilis (Lea, 1838)
    • Authors: F. Othman; M. S. Islam, E. N. Sharifah, F. Shahrom‐Harrison, A. Hassan
      Abstract: Since bivalve mussels are able to graze heavily on bacteria, in this paper it is hypothesized that when mussels are cultured with fish, the filtering efficiency of the mussels will keep the bacterial population below a certain threshold and thus assist in reducing the risk of bacterial disease outbreaks. The ability of the filter‐feeding bivalve mussel Pilsbryoconcha exilis to control Streptococcus agalactiae was tested in a laboratory‐scale tilapia culture system. Juvenile Nile tilapia (Oreochromis niloticus), the bivalve mussel as well as the bacteria were cultured at different combinations using four treatments: treatment‐1: mussel and bacteria but no fish, treatment‐2: tilapia and mussel but no bacteria, treatment‐3: tilapia and bacteria but no mussel, and treatment‐4: tilapia, mussels, and bacteria. All treatments were run in three replicates; stocking rates were 10 tilapia juveniles; five mussels; and about 3.5 × 105 colony forming units (CFU) ml−1 of bacteria in 50‐L aquaria with 40‐L volume. The mussel reduced the bacterial population by 83.6–87.1% in a 3‐week period whereas in the absence of the mussel, the bacterial counts increased by 31.5%. Oresence of the mussel also resulted in significantly higher growth and lower mortality of tilapia juveniles than when the mussel was absent. The results of this experiment suggest that the freshwater mussel P. exilis could control the population of S. agalactiae in a laboratory‐scale tilapia culture system. Future studies should focus on the dynamic interactions among fish, mussels, and bacteria as well as on how input such as feed and other organic materials affect these interactions.
      PubDate: 2015-05-28T07:15:41.223061-05:
      DOI: 10.1111/jai.12804
       
  • Northward range extension of the nakedband gaper, Champsodon nudivittis
           (Ogilby, 1895) (Osteichthyes: Champsodontidae), towards Maden Island,
           Edremit Bay, Turkey
    • Authors: H. Torcu Koc; Z. Erdogan, C. Sarıgöl
      PubDate: 2015-05-28T04:33:03.836642-05:
      DOI: 10.1111/jai.12799
       
  • Ionregulation in juvenile swordspine snook (Centropomus ensiferus, Poey,
           1860) in relation to environmental salinity
    • Authors: J. Suárez‐Bautista; A. Rodríguez‐Forero
      Abstract: Ninety‐nine swordspine snook Centropomus ensiferus (9.80 ± 0.3 g, mean ± SE) were studied in order to evaluate the influence of salinity on physiological properties under rearing conditions. Growth performance, survival rates, and ion concentrations (Na+, K+, Cl−) as well proximal composition were measured over 76 days. Fish were exposed to three experimental salinities (0, 10, 20‰, three replicates per treatment) and maintained in plastic tanks with a recirculation system equipped with flow‐through aquaria pumps (533 L per tank). Fish were fed twice daily to apparent satiation; at the end of the experiment the weight of fish kept in 10‰ was higher than that of fish kept in 0 and 20‰, however no significant differences (P > 0.05) were observed among the experimental salinities. Survival was significantly lower in 10‰ salinity than in fish kept in 20 and 0‰ salinities. No significant differences (P > 0.05) were found in the Condition factor (K), specific growth rate (SGR), or in plasma Na+, K+, or Cl− concentrations among treatments. Salinities also did not affect body composition (P > 0.05), but were significantly lower (P  4%) was observed. Water quality was within the optimum range (T: 28.7 ± 0.1°C; O2: 5.6 ± 0.1 mg L−1; ammonia: 0.2 mg L−1) for the growth of swordspine snook. Data indicates that C. ensiferus is an ionoregulator fish and able to cultivate successfully in various osmotic conditions, and in turn, maintain high levels of survival in captivity.
      PubDate: 2015-05-27T01:32:50.281209-05:
      DOI: 10.1111/jai.12796
       
  • Growth and muscle cellularity of diploid and triploid Atlantic cod (Gadus
           morhua Linnaeus, 1758) larvae
    • Authors: C. Campos Vargas; S. Peruzzi, Ø. Hagen
      Abstract: The aim of this study was to compare somatic growth and muscle fibre development in diploid and triploid siblings of Atlantic cod (Gadus morhua Linnaeus, 1758) during the larval stage. Newly hatched larvae were transferred into 200‐L tanks, three tanks per ploidy group (70 larvae L−1, continuous light, gradually increasing seawater temperature 7–11°C and flow rates 50–117 L h−1). Larvae were fed rotifers from 2 to 22 days post hatch (dph), Artemia 19–31 dph and weaned onto a microparticulate diet from 26 dph until the end of the experiment. Measurements of growth (dry weight, standard length) and muscle cellullarity were taken at intervals between 1 and 44 dph. Ploidy groups showed a similar performance throughout the trial, although a marked stagnation in growth was observed for triploids during the weaning from Artemia onto dry feed. Overall, diploid and triploid cod larvae showed a similar development in muscle fibre growth pattern during the experimental period. For both groups, the total number of fast muscle fibres showed a 10‐fold increase (from 384 to 3462), whereas the diameter of fast fibre increased from 8.9 to 13.3 μm (mean number from all treatments). Thus, a temporary but significant effect of triploidy on fast muscle fibre growth pattern was observed in 19 dph larvae in terms of fibre size and number, with triploids showing larger mean fast fibre diameter (11.62 ± 0.63 vs. 10.05 ± 0.34) and a lower number of fibres with a diameter
      PubDate: 2015-05-26T07:17:38.808207-05:
      DOI: 10.1111/jai.12792
       
  • Evaluating bony structures for ageing and growth parameters of Capoeta
           banarescui inhabiting the lower Melet River (Ordu, Turkey)
    • Authors: D. Bostanci; G. Kurucu, N. Polat
      Abstract: The aim of this study was to investigate the reliability of bony structures for age determination. A total of 247 Capoeta banarescui individuals were analyzed. Fish were caught on the lower Melet River between July 2010 and October 2012. Sex ratio was 2.5 : 1. The specimens ranged from 8.1 to 21 cm in total length and 5.07 to 108.93 g in weight. Age determined from vertebrae, scales, asteriscus and lapillus otoliths were variable. The highest percent agreement (PA) (69.2%) and the lowest average percent error (APE) (4.24%) and coefficient of variation (CV) (8.71%) were obtained for vertebrae. Hence, it was determined that the vertebra is the most reliable ageing structure for C. banarescui in the lower Melet River. Females were age I–V years and males I–V years. The von Bertalanffy growth equation was established for females, males, and all individuals, respectively: Lt = 23.9 [1−e−0.22 (t+1.89)], Lt = 21.8 [1−e−0.26 (t+1.58)], Lt = 26.7 [1−e−0.17 (t+2.21)].
      PubDate: 2015-05-25T02:26:05.752511-05:
      DOI: 10.1111/jai.12787
       
  • Correlations between body length and otolith size in smallmouth bass
           Micropterus dolomieu Lacépède, 1802 with implications for
           retrospective growth analyses
    • Authors: R. Humston; M. Moore, C. Wass, D. Dennis, S. Doss
      Abstract: Reconstructing individual growth history from analysis of increments in otoliths, scales, or spines can provide information on past growth responses to environmental variation, which in turn can be useful for predicting population‐level response to climate change. The objective of this study was to examine correlations between body length and different metrics of otolith size for Micropterus dolomieu. Three metrics corresponding to commonly‐used microstructural and ultrastructural otolith dimensions were measured using image analysis of digital micrographs from a sample of 214 M. dolomieu ranging from 115 to 438 mm total length collected in 2011–2013. It was found that anteroposterior length of whole otoliths provided much improved regression relationships with body size as well as ease of data collection and faster sampling throughput compared with microstructural measures from polished sections. When applying these metrics to reconstruct growth history the biological intercept model generally produced more reasonable back‐calculated estimates of length‐at‐age, although this was not consistent across all otolith metrics. Results suggest that whole otolith measures should be employed due to efficiency of data collection and greater reliability for reconstructing growth history in M. dolomieu.
      PubDate: 2015-05-25T02:25:48.565287-05:
      DOI: 10.1111/jai.12801
       
  • Growth and contribution of stocked channel catfish, Ictalurus punctatus
           (Rafinesque, 1818): the importance of measuring post‐stocking
           performance
    • Authors: D. R. Stewart; J. M. Long
      Abstract: In this study it was sought to quantify post‐stocking growth, survival, and contribution of advanced size (178 mm total length [TL]) channel catfish Ictalurus punctatus fingerlings, something rarely done. Channel catfish populations were evaluated before (May 2010) and after (May to August 2011 and 2012) stocking. Relative abundance, stocking contribution, and growth were different (P 
      PubDate: 2015-05-23T02:43:09.925672-05:
      DOI: 10.1111/jai.12797
       
  • Length‐weight relationships for 15 fish species from Atlantic rain
           forest streams, southeastern Brazil
    • Authors: M. R. Costa; T. Moreti, W. Uehara, H. K. Santos, F. G. Araújo
      Abstract: Length‐weight relationships were determined for 15 fish species from the tributary Atlantic rain forest steams that drain into Sepetiba Bay, southeastern Brazil. This is the first record of length‐weight relationships for 12 of these species and new maximum lengths for four species. These results will be useful for management and conservation of this area of the Atlantic rain forest drainages.
      PubDate: 2015-05-23T02:42:51.629029-05:
      DOI: 10.1111/jai.12788
       
  • Production of recombinant great sturgeon (Huso huso, Linnaeus, 1758)
           growth hormone (GH) by Pichia pastoris (Guillierm, 1956)
    • Authors: L. Azizzadeh Pormehr; M. Pourkazemi
      Abstract: In this research, the encoding cDNA of growth hormone (GH) was cloned from the pituitary gland of great sturgeon Huso huso (three adults: two females and one male, 7–9 years old, 70–90 kg, reared in concrete ponds). In order to obtain the great sturgeon recombinant GH expression in Pichia pastoris, the mature encoding cDNA was first cloned in TA vector PTZ57R and then sequenced. After confirmation of the correct GH sequence, the GH coding sequence was subcloned into pHILS1 expression vector. The yeast Pichia pastoris GS115 strain was transformed with the expression plasmid. Results obtained from this study showed that great sturgeon GH recombinants were expressed upon induction with methanol and exported into the medium. The level of expression was examined using RNA analysis, SDS‐PAGE, and western blot analysis. RNA analysis of the recombinant strains showed a sharp, specific band in 800 bp. The specific band in transformants indicated the presence of GH RNA in the yeast. SDS‐PAGE and western blot analysis showed a specific 21 kDa band for the growth hormone. Culture conditions were optimized for pH = 6 and incubation time (after 24 h induction, peaking at 72 h) for maximal protein production. The results provide useful information for the future production of recombinant growth hormones in other sturgeon species.
      PubDate: 2015-05-21T06:02:52.740337-05:
      DOI: 10.1111/jai.12784
       
  • Isolation and characterization of tandem repeat sequences in the growth
           hormone gene of the red seabream, Pagrus major (Temminck & Schlegel,
           1843)
    • Authors: E. Sawayama; M. Takagi
      PubDate: 2015-05-21T01:00:23.704934-05:
      DOI: 10.1111/jai.12800
       
  • Length–weight and length–length relationships of eight endemic
           Aphanius species from Turkey
    • Authors: B. Yoğurtçuoğlu; F. G. Ekmekçi
      Abstract: Length–weight and length–length relationships were assessed for eight endemic Aphanius species from Turkey. This study provides a new reference on length–weight and length–length relationships and new maximum sizes for all species examined.
      PubDate: 2015-05-21T00:59:38.857572-05:
      DOI: 10.1111/jai.12789
       
  • Reproductive traits of shovelnose sturgeon Scaphirhynchus platorynchus
           (Rafinesque, 1820) in the lower Platte River, Nebraska
    • Authors: M. J. Hamel; M. L. Rugg, M. A. Pegg, R. Patiño, J. J. Hammen
      Abstract: We assessed reproductive status, fecundity, egg size, and spawning dynamics of shovelnose sturgeon Scaphirhynchus platorynchus in the lower Platte River. Shovelnose sturgeon were captured throughout each year during 2011 and 2012 using a multi‐gear approach designed to collect a variety of fish of varying sizes and ages. Fish were collected monthly for a laboratory assessment of reproductive condition. Female shovelnose sturgeon reached fork length at 50% maturity (FL50) at 547 mm and at a minimum length of 449 mm. The average female spawning cycle was 3–5 years. Mean egg count for adult females was 16 098 ± 1103 (SE), and mean egg size was 2.401 ± 0.051 (SE) mm. Total fecundity was positively correlated with length (r2 = 0.728; P 
      PubDate: 2015-05-21T00:58:43.253048-05:
      DOI: 10.1111/jai.12785
       
  • Effects of catching methods on quality changes of Rutilus kutum (Kamensky,
           1901) during storage in ice
    • Authors: P. Raoofi; S. M. Ojagh, B. Shabanpour, M. Eighani
      Abstract: The quality of fish varies among the different methods of capture and storage times. In this study Rutilus kutum was captured by beach seine and gillnet and stored for up to 16 days; thereafter the changes in microbiological quality (total viable and psychrophilic counts) and chemical quality (pH, total volatile basic nitrogen, thiobarbituric acid, and free fatty acids) were evaluated. The storage time and method of capture had significant effects (P 
      PubDate: 2015-05-15T08:58:28.125031-05:
      DOI: 10.1111/jai.12795
       
  • Length‐weight and length‐length relationships of four Alosa
           species along the southern Caspian Sea coast
    • Authors: S. R. Ghotbi‐Jokandan; M. S. Alavi‐Yeganeh, S. Jamshidi
      Abstract: This study investigates length‐weight and length‐length relationships of four shad species (Alosa braschnikowi, Alosa caspia, Alosa kessleri, and Alosa saposchnikowii) captured on the southern Caspian Sea coast of Iran. The relationship of total length (TL), fork length (FL) and standard length (SL) and the relationship between total length and body weight are presented.
      PubDate: 2015-05-15T08:58:12.76612-05:0
      DOI: 10.1111/jai.12790
       
  • Fatty acid composition of wild Odontesthes bonariensis (Valenciennes 1835)
           larvae: implications on lipid metabolism and trophic relationships
    • Authors: G. A. Kopprio; M. Graeve, G. Kattner, R. J. Lara
      Abstract: The fatty acid composition of the pejerrey Odontesthes bonariensis larvae was studied to elucidate potential dietary relationships. Their principal fatty acids were characteristic for membrane lipids of aquatic organisms. The fatty acid composition varied little throughout seasons, with high proportions of 22 : 6(n‐3) (27% of total fatty acids), which is biosynthesized de novo from dietary precursor fatty acids and/or accumulated from the diet. Other major fatty acids were 16 : 0 and 18 : 0. The diatom‐typical 16 : 1(n‐7) and other dietary fatty acids (zooplankton and microplankton) are not reflected in the larvae, thus limiting the use of fatty acids as trophic markers for food web relationships of atherinopsids.
      PubDate: 2015-05-15T08:57:56.842721-05:
      DOI: 10.1111/jai.12786
       
  • Length–weight relationships of three fish species from the Tajan
           River, Iran
    • Authors: H. Jamali; M. Faramarzi, R. Patimar, S. Kiaalvandi
      Abstract: The study describes the length–weight relationships for two Cobitid species, namely Cobitis keyvani and Sabanejewia aurata, plus a Gobiid species, Ponticola gorlap, all from the Tajan River in Mazandaran province, Iran.
      PubDate: 2015-05-14T02:29:44.893521-05:
      DOI: 10.1111/jai.12793
       
  • Spatio‐temporal dynamics in the location of the fishing grounds and
           catch per unit effort (CPUE) for Chilean jack mackerel (Trachurus murphyi
           Nichols, 1920) from Chinese trawl fleets on the high seas of the Southeast
           Pacific Ocean, 2001–2010
    • Authors: H. Zhang; S.‐M. Zhang, X.‐S. Cui, S.‐L. Yang, C.‐J. Hua, H.‐Y. Ma
      Abstract: The decadal spatio‐temporal distribution of the fishing effort and catch per unit effort (CPUE) for Chilean jack mackerel, Trachurus murphyi, stock are poorly understood. Data from the Chinese jack mackerel fleet was used to describe the location of the fishing effort and the relationship between standardized CPUE and sea surface temperatures (SST) during the period 2001–2010. A significant change in the spatio‐temporal distribution of fishing effort and standardized CPUE was observed for jack mackerel during the study period. From January to March, the average CPUE was generally
      PubDate: 2015-05-14T00:54:18.271683-05:
      DOI: 10.1111/jai.12765
       
  • Fish by‐catch in shrimp beam trawls in the northern South China Sea
    • Authors: B.‐Z. Yang; L. Yang, P. Zhang, Y.‐G. Tan, L. Yan, S. Chen
      Abstract: The by‐catch of shrimp beam trawl fisheries in the northern South China Sea were estimated during the 2005–2006 and 2012–2013 fishing seasons. A total of 98 hauls from three important shrimp fishing grounds were used in the analyses. A total of 119 by‐catch species were captured, compared with only 15 target species. The ratio of by‐catch to shrimp ranged from 1.01 to 13.90. The dominant standard length (SL) range of fish by‐catch was 51–100 mm. The percentage of juveniles in the total catch of some fish species was high (e.g. 100% for A. aneus).
      PubDate: 2015-05-01T23:47:28.918997-05:
      DOI: 10.1111/jai.12777
       
  • Issue Information
    • PubDate: 2015-04-24T06:25:13.163537-05:
      DOI: 10.1111/jai.12575
       
  • Length–weight and length–length relationships for nine fish
           species from Lhasa River Basin, Tibet, China
    • Authors: L.‐Q. Fan; X.‐J. Zhang, G. Pan
      Abstract: The present study reports length–weight relationships (LWR) and length–length relationships (LLR) for five native freshwater fish species (Schizopygopsis younghusbandi, Triplophysa orientalis, T. tibetana, T. stewartii and T. stenura) and four introduced freshwater fish species (Pseudorasbora parva, Carassius auratus, Micropercops cinctus and Oryzias latipes) captured in the Lhasa River Basin, Tibet, China. Five of the LWRs are presented for the first time.
      PubDate: 2015-04-23T00:23:29.493152-05:
      DOI: 10.1111/jai.12760
       
  • The effects of tissue type and body size on δ13C and δ15N values
           in parrotfish (Labridae) from Zanzibar, Tanzania
    • Authors: J. G. Plass‐Johnson; C. D. McQuaid, J. M. Hill
      Abstract: Differences between the stable isotopic ratios (δ13C and δ15N) of two tissues (blood and muscle) from four species of East African coral reef parrotfishes (family: Labridae, tribe: Scarini) were analysed across a broad spectrum of body sizes. Comparison of isotopic ratios between the tissues allowed the assessment of using blood as an alternative tissue to muscle. In 2010–2011, constant differences between tissues (δblood minus δmuscle) were found across a broad range of sampled fish lengths. Linear relationships between the tissues, specific for an isotope, indicate that constants could be generated for converting blood isotope into muscle isotope values. Only one species, Chlorurus sordidus, displayed an inconsistent difference between tissues in δ15N, indicating that this ratio was dependent on fish length. The δ13C of both tissues was positively related linearly to fish length for three species, while δ15N showed no relationship with body length. The results are interpreted as indicating dietary consistency over days to weeks, the time of tissue turnover for blood and muscle, respectively. Lastly, differences among the species, even closely related species, show that the generation of tissue conversion constants is species‐specific.
      PubDate: 2015-04-20T05:33:21.65657-05:0
      DOI: 10.1111/jai.12746
       
  • The effects of storage time of frozen pike (Esox lucius Linnaeus, 1758)
           fillets on the chemical composition as determined by various deterioration
           indicators
    • Authors: M. Hajisafarali; B. Karami, S. Moini, S. Safi
      Abstract: The study was designed to investigate the effects of frozen storage on the proximate composition and chemical indices of pike (Esox lucius) stored for a period of six months at −20°C. During storage the moisture, protein and fatty acid contents decreased and the ash, total volatile basic nitrogen (TVB‐N) and peroxide value (PV) content increased significantly (P 
      PubDate: 2015-04-16T06:33:02.777693-05:
      DOI: 10.1111/jai.12770
       
  • The in vitro antifungal activity of 30 Chinese herb extracts to
           Saprolegnia sp.
    • Authors: X. L. Huang; R. J. Liu, S. Whyte, Z. J. Du, D. F. Chen, Y. Q. Deng, K. Y. Wang, Y. Geng
      Abstract: Chinese traditional medicines have been used for several thousands of years in Asian countries, not only in humans but also in many animal species. These compounds prevent and control different types of diseases including internal diseases as well as some infectious diseases, where the aetiological agent is viral, bacterial, parasitic or mycotic. Rhizoma coptidis is believed to inhibit Shigella dysenteriae and that Radix isatidis can prevent flu caused by the influenza virus. It is thus hypothesized that some of these traditional herbal compounds will have anti‐fungal activity. Saprolegniosis is a disease common in fish and their eggs in both fresh and brackish water; a newer, safer medication against Saprolegnia is needed after the prohibition in many countries of the extremely effective fungicide, malachite green. In the present study an attempt is made to identify herbal compounds that have anti‐Saprolegnia activity. A strain of Saprolegnia, CCF1301, was isolated from the skin of infected grass carp (Ctenopharyngodon idella) and identified as Saprolegnia ferax by the 26S rDNA D1/D2 region and ITS region. This strain was used to evaluate the antifungal activity of thirty Chinese traditional herbal medicine extracts, and a modified dish dilution method was developed for the evaluation. Saprolegnia‐infected rapeseeds with visible hyphae were transplanted onto prepared PDA plates containing 2 g L−1 herbal plant extracts and incubated at 20°C for 48 h. Each herbal plant species was tested in triplicate. Those herbal plant extracts that showed negative mycelium presence at 2 g L−1 were further tested for minimum inhibitory concentration (MIC) evaluation. The results showed that Syzygium aromaticum, Magnolia officinalis, Melaphis chinensis, Euphorbia fischeriana Steud, and Sophora flavescentis exhibited enhanced growth inhibition at 2 g L−1 and MIC values of 500, 62.5, 250, 62.5, 250 mg L−1 concentrations, respectively. It was obvious that Magnolia officinalis and Euphorbia fischeriana Steud exhibited the best antifungal activity. Since there is a high natural toxicity in Euphorbia fischeriana Steud, its applicability as the main ingredient in an aquaculture therapeutic formulation requires further research. Thus, Magnolia officinalis would appear to be the more valuable antifungal herbal species with which to pursue further research.
      PubDate: 2015-04-10T06:42:50.457998-05:
      DOI: 10.1111/jai.12773
       
  • Length–weight relationships of thirty‐seven fish species from
           the Hongshui River, Southwest China
    • Authors: Y. F. Que; L. Pan, F. Chen, S. Xie, X. L. Liao, N. Zhao
      Abstract: Length‐weight relationships (LWR) were estimated for 37 fish species belonging to ten families from the middle and lower stream of the Hongshui River, one of the main tributaries to the Pearl River, Southwest China. Length‐weight relationships for 26 species are unknown to FishBase and new maximum lengths are recorded for 20 species. These results are useful for fishery research, conservation and management in the Hongshui River.
      PubDate: 2015-04-09T06:38:45.687714-05:
      DOI: 10.1111/jai.12759
       
  • Effects of dietary xanthophylls/astaxanthin ratios on the growth and skin
           pigmentation of large yellow croaker Larimichthys crocea (Richardson,
           1846)
    • Authors: X.‐W. Yi; J. Li, W. Xu, Y.‐J. Zhang, H.‐H. Zhou, A. A. Smith, W.‐B. Zhang, K.‐S. Mai
      Abstract: An 8‐week feeding trial was conducted to evaluate the effects of dietary xanthophylls/ astaxanthin ratio on the growth and skin color of large yellow croaker, Larimichthys crocea. Five pigment‐supplemented diets were formulated to contain 75/0, 50/25, 37.5/37.5, 25/50 and 0/75 mg kg−1 of xanthophylls/astaxanthin. The xanthophylls contain 89.31% lutein and 6.12% zeaxanthin. A diet without pigment supplementation was used as the control. The large yellow croaker juveniles (13.80 ± 0.03 g) were randomly distributed in 18 sea cages (1.0 × 1.0 × 1.5 m) at a density of 45 fish per cage. Water temperature ranged from 21 to 31°C during the feeding trial. To obtain results, the survival rate, specific growth rate, feed conversion ratio, skin redness, skin yellowness, skin lightness, skin carotenoid content and skin melanin content were measured. The results showed that the survival rate, specific growth rate and feed conversion ratio were not significantly affected by dietary treatments (P > 0.05). The ventral skin lightness was also not affected by dietary treatments (P > 0.05); however, the dorsal skin lightness of fish fed with the control diet was significantly lower than those fed with pigment‐supplemented diets (P  0.05). Lightness and yellowness were linearly related to skin carotenoid content. Meanwhile, skin yellowness and carotenoid content were linearly related to the proportion of xanthophylls in dietary pigments.
      PubDate: 2015-04-09T06:38:29.965925-05:
      DOI: 10.1111/jai.12763
       
  • Invasive bivalve assessment in the diet of pejerrey, Odontesthes
           bonariensis (Valenciennes, 1835), at the Upper Río de la Plata,
           Argentina
    • Authors: F. Brancolini; M. E. Maroñas, E. D. Sendra, D. C. Colautti
      PubDate: 2015-04-08T23:57:20.580844-05:
      DOI: 10.1111/jai.12753
       
  • Seasonal growth of Mugil liza Valenciennes, 1836 in a tropical estuarine
           system
    • Authors: M. F. Sousa; N. N. Fabré, V. S. Batista
      Abstract: Seasonal changes in the abiotic factors and cyclical events – with the reproduction diagnosed by the gonadosomatic index and the energy status diagnosed by the condition index – were estimators of seasonal growth for juvenile and adult lebranche mullets, Mugil liza, during the rainy and dry seasons in a tropical estuarine system of the western south Atlantic. Fish were collected monthly by gillnets of different mesh sizes. Salinity, water temperature (°C) and dissolved oxygen (%) were measured using a multiparameter. Daily rainfall data (mm) were obtained from the National Institute of Meteorology. Seasonal rings were identified and counted in the sagittae otoliths. Relative Marginal Increment (RMI) was calculated to determine the seasonal growth rate. Gonadosomatic Index (GSI) and Condition Index (CI) were assessed separately for juveniles and adults by anova, with time (month) M. liza growth is controlled by annual cycles of biological and abiotic processes. Using general linear models, the seasonal growth rate of M. liza was well predicted by body condition and rainfall for juveniles, and by salinity for adults. Seasonal variation was observed in the Mundaú Lagoon, with rainfall directly or indirectly being the main seasonal factor influencing the cyclical biological fish processes of M. liza.
      PubDate: 2015-04-08T23:47:22.444413-05:
      DOI: 10.1111/jai.12704
       
  • Occurrence of Cyprinus carpio (Linnaeus, 1758) in a World Biosphere
           Reserve, the Mar Chiquita Coastal Lagoon (Argentina)
    • Authors: M. González‐Castro; J. J. Rosso, N. A. Lajud, D. L. Castellini, J. M. Díaz de Astarloa
      PubDate: 2015-04-08T07:10:40.940424-05:
      DOI: 10.1111/jai.12780
       
  • On the occurrence of live sharksucker, Echeneis naucrates Linnaeus, 1758
           (Perciformes: Echeneidae), in Turkish waters (Eastern Mediterranean)
    • Authors: O. Akyol; C. Capapé
      PubDate: 2015-04-08T07:06:35.587766-05:
      DOI: 10.1111/jai.12775
       
  • Use of dolphins and caimans as bait for Calophysus macropterus
           (Lichtenstein, 1819) (Siluriforme: Pimelodidae) in the Amazon
    • Authors: S. M. Brum; V. M. F. Silva, F. Rossoni, L. Castello
      Abstract: A new fishery has been developing in the Amazon that uses dolphin and caiman species as bait to catch piracatinga (Calophysus macropterus), having thus the potential to cause adverse food‐web impacts; however a lack of basic understanding of this fishery is a limitation to the necessary management action. Interviews with fishers and analyses of fishing records in Brazil were used for the study, including harvest methods, types of baits used, commercialization chains, and the rate of increase of piracatinga yields in recent years. Piracatinga fishers are subsistence fishers who harvest piracatinga as a means to alleviate economic constraints when the catch of other species is not profitable or banned due to (reproductive) closed seasons. Harvesting is done with wooden and nylon crates and cages in which whole or pieces of caimans and dolphins are placed to attract the piracatinga, entrapping them. The piracatinga are then sold to intermediate sellers for resale to a few large fish freezing and processing plants for export to Colombia. Annual piracatinga yields in the study area increased at an average rate of 446.5% per year, from 865 kg in 2003 to 23 176 kg in 2009. Because dolphins and caimans comprise various endangered species, the Brazilian government has recently implemented a ban on this fishery, which can be enforced at fish freezing and processing plants. However, there is a danger that such enforcement will lead to the development of a geographically dispersed chain of commercialization and export, such as currently exists for other species including caimans, which would be impossible to control.
      PubDate: 2015-04-08T06:53:25.100516-05:
      DOI: 10.1111/jai.12772
       
  • Length‐weight relationships for nine fish species of Laohegou River,
           a tributary of upper Yangtze River, China
    • Authors: J. Lei; Y. Y. Liang, X. Y. Sui, Y. F. Chen
      Abstract: This paper provides length‐weight relationships for nine fish species from the Laohegou River, a tributary of the upper Yangtze River. Length‐weight relationships for six of these species are recorded for the first time. New maximum lengths for two species are also reported.
      PubDate: 2015-04-08T06:48:07.996822-05:
      DOI: 10.1111/jai.12756
       
  • Trawl selectivity‐induced evolution effects on age structure and
           size‐at‐age of largehead hairtail (Trichiurus lepturus)
           Linnaeus, 1758 in the East China Sea, China
    • Authors: P. Sun; Z.‐L. Liang, Y. Yu, Y.‐L. Tang, F.‐F. Zhao, L.‐Y. Huang
      Abstract: Increasing evidence has demonstrated that the life history traits of fishes have changed in many exploited populations, caused principally by intense fishing mortality and size‐selectivity of the fishing gear. Broad and intensive trawl fishing over an extended period has the enormous potential to change the biological characters of exploited fish populations. An individual‐based model was developed to explore the interactions between trawl fishing and evolutionary changes in length‐at‐age and age structure of an exploited fish population. A perennial fish population was simulated with a multiple age structure in the model to examine the effects of long‐term trawl fishing on hairtail, Trichiurus lepturus, in the East China Sea. The results revealed that distribution of the body length‐at‐age and the age structure of the fish population were irreversibly changed under long‐term trawl fishing. The simulated results confirm that the length‐at‐age is increasing shorter, the younger individuals dominate, the influence of trawl selectivity on the biological traits of the fish population is highly significant, and that these changes have potentially evolutionary consequences on the fish body length‐at‐age.
      PubDate: 2015-04-06T08:26:54.57799-05:0
      DOI: 10.1111/jai.12774
       
  • Diel pattern of fish presence at the Changzhou fishway (Pearl River,
           China) during the flood season
    • Authors: J. P. Tao; X. Wang, X. C. Tan, Y.‐P. Cai, Y. Qiao, J.‐B. Chang
      Abstract: Restoration of fish populations is required in China with the use of fishways at dammed rivers, but scant biological data is available for their design and operation. The Changzhou fishway (CFW) on the Pearl River is the largest in China, providing a channel for multispecies upstream migrations. This preliminary study used a combination of fish traps and hydroacoustic detection to document the diurnal presence of fish in the CFW, with the purpose of providing essential data for a future, solid performance of this fishway. Eighteen species from a total of 1362 fish individuals were collected in the traps. Three species were dominant, namely, Squaliobarbus curriculus, Pseudobagrus vachellii and Cirrhinus molitorella, altogether sharing proportions of 74.70 and 76.26% in the daytime and nighttime, respectively. Balanced by the up‐/downward movements of each fish, they entered the fishway with net numbers of 339.9 ± 113.4 ind.h−1, and exited with net numbers of 234.54 ± 26.66 ind.h−1. In diel fishway use, no significant differences were observed in either species composition or individual size during a diurnal period. Fish presence at the monitored sites within the fishway was recorded primarily during the daytime, showing a particular trend towards crepuscular use at the entrance and an uninterrupted use at the exit. This initial study showed a significant fish presence in the CFW during the flood season; the outcome of the study will be the basis of future research aimed at evaluating the passage efficiency of the CFW and the use thereof in other seasons.
      PubDate: 2015-02-10T04:38:38.537674-05:
      DOI: 10.1111/jai.12706
       
  • Occurrence of the Erythrean invader Pteragogus pelycus Randall, 1981
           (Teleostei: Labridae) in the eastern Aegean sea
    • Authors: H. H. Yapici; S. Yapici, S. Agdamar, U. Acar
      Abstract: The occurrence of the Erythrean fish Pteragogus pelycus, off Kusadasi Bay, Turkey, eastern Aegean Sea, is here reported for the first time. One specimen was collected and it is now maintained in aquarium. The finding shows that its population is expanding northwards, along the Anatolian coasts of the Aegean Sea, approaching the colonization of the whole south and central basin.
      PubDate: 2015-02-10T04:26:34.20452-05:0
      DOI: 10.1111/jai.12705
       
  • Length‐weight relationships of eleven fish species from the middle
           reaches of Jinsha River, southwest China
    • Authors: L. Pan; W. T. Li, J. J. Xie, Y. F. Que, N. Zhao, Z. Yang, H. Y. Tang, C. Dong, J. L. Qin, Y. Qiao
      Abstract: Length‐weight relationships (LWRs) were determined for eleven endemic fish species [Coreius guichenoti (Sauvage & Dabry de Thiersant, 1874), Glyptothorax sinensis (Regan, 1908), Leptobotia elongata (Bleeker, 1870), Leptobotia taeniops (Sauvage, 1878), Pseudobagrus crassilabris (Günther, 1864), Rhinogobio ventralis (Sauvage & Dabry de Thiersant, 1874), Saurogobio dabryi (Bleeker, 1871), Schizothorax chongi (Fang, 1936), Schizothorax kozlovi (Nikolskii, 1903), Schizothorax prenanti (Tchang, 1930) and Schizothorax wangchiachii (Fang, 1936)] from the middle reaches of the Jinsha River in southwest China. Samples were obtained between May 2004 and July 2013 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 four species (P. crassilabris, S. chongi, S. kozlovi and S. prenanti) were unknown.
      PubDate: 2015-02-06T04:16:27.281477-05:
      DOI: 10.1111/jai.12684
       
  • Annual reproductive cycle, spawning periodicity and sexual maturity of
           false scad Caranx rhonchus (Geoffroy Saint‐Hilaire, 1817) (Pisces,
           Carangidae) from the South‐Eastern Mediterranean (Gulf of
           Gabès, Tunisia)
    • Authors: A. Sley; A. Hadj Taeib, O. Jarboui, M. Ghorbel, A. Bouain
      First page: 437
      Abstract: The reproductive biology of Caranx rhonchus (Geoffroy Saint‐Hilaire, 1817) (Pisces, Carangidae) was studied in the Gulf of Gabès (Mediterranean Sea) from June 2004 to May 2006. Of 1313 individuals examined, 668 were females (50.9%) and 645 were males (49.1%). The overall sex ratio did not deviate significantly in favour of females (♀ : ♂ = 1.04 : 1). Monthly changes in the Gonado–Somatic Index (GSI) showed a rapid increase from May to June and an extended very high level from June to September (4.43–3.47% for females and 3.35–2.61% for males), before declining sharply in October (down to 2.02% for females and 0.57% for males). The gametogenesis activity began with a pre‐maturation phase from March to May, followed by a ripe‐spawning phase from June to September. From the last days of July to the end of October, the gonads were in the spent and post‐spawning stages. From November to early May, gonads were in the resting stages. The size at which 50% of the population reached sexual maturity was not significantly different between males and females :  males attained sexual maturity at fork length FL50 = 161.20 ± 0.37 mm (n = 262), whereas females attained maturity at FL50 = 160.70 ± 0.23 mm (n = 296). The age of maturity for both sexes occurred at 2.1 years.
      PubDate: 2015-02-14T00:57:07.450659-05:
      DOI: 10.1111/jai.12675
       
  • Spawning, maturity, growth and movement of Platycephalus fuscus (Cuvier,
           1829) (Platycephalidae): fishery management considerations
    • Authors: C. A. Gray; L. M. Barnes
      First page: 442
      Abstract: The dusky flathead (Platycephalus fuscus) is an important teleost harvested by recreational and commercial fishers throughout its endemic distribution along eastern Australia. This study indicates that the species has an extended spawning period throughout the austral summer, with females in spawning condition occurring in lower estuarine and coastal waters. Total length (L50) and age (A50) at which 50% (±1 SE) of the population was mature was 31.72 (±1.08) cm TL and 1.22 (±0.44) years for males and 56.75 (±0.60) cm TL and 4.55 (±0.13) years for females. The von Bertalanffy growth parameters differed significantly between sexes; females grew faster and attained a greater maximum TL and age than males. The largest female was 98.5 cm TL (7.5 kg), and the oldest 16 years, whereas the largest male was 61.5 cm TL (1.58 kg) and 11 years of age. A tag‐and‐release study identified the exchange of sub‐adult and mature‐sized individuals among estuaries. Determinations of length‐based management regulations for the species are compounded by the large gender‐based differences in growth and length‐at‐maturity. Current minimum legal lengths of 30–40 cm TL protect approximately 3–9% of the female spawning population. Alternative management options, including harvest slot sizes, need to be investigated and tested.
      PubDate: 2015-01-30T04:22:53.737602-05:
      DOI: 10.1111/jai.12703
       
  • Eelgrass, Zostera marina, as essential fish habitat for
           young‐of‐the‐year winter flounder, Pseudopleuronectes
           americanus (Walbaum, 1792) in Maine estuaries
    • Authors: M. A. Lazzari
      First page: 459
      Abstract: Distribution and density by habitat for age‐0, young‐of‐the‐year (YOY) winter flounder, Pseudopleuronectes americanus (Walbaum, 1792), were compared for two Maine estuaries to help define essential fish habitat for this life history stage. Two estuaries (Weskeag River and Penobscot Bay) along Mid‐coast Maine were sampled monthly with daytime 1.0 m2 fixed‐frame throw traps around neap low tide, May–December over two consecutive years (2003–2004). Both eelgrass and adjacent sand/mud (20–60 cm deep) were randomly sampled with equal effort (4–12 samples per month) at two sites in both the Weskeag River and Penobscot Bay. Significantly higher densities of YOY winter flounder (2–9 cm TL) occurred in eelgrass relative to sand/mud. Density increased significantly in both habitats in 2004, and was higher in Penobscot Bay relative to the Weskeag River. YOY densities compared by eelgrass coverage within throw traps were found to be significantly higher in eelgrass that exceeded 30% coverage when compared with adjacent sand/mud areas and eelgrass coverage of 10–20%. YOY occurred in all months sampled (May–December); no density differences existed by month. These results indicate that very shallow (
      PubDate: 2015-03-14T03:42:35.125233-05:
      DOI: 10.1111/jai.12713
       
  • Evaluation of an improved RNA/DNA quantification method in a common carp
           (Cyprinus carpio Linnaeus 1758) larval feeding trial with Artemia, two
           nematodes (Panagrellus redivivus Linnaeus 1758, Panagrolaimus sp. Fuchs
           1930) and dry feed
    • Authors: R. Tillner; T. Assheuer, B. Rennert, A. Trubiroha, C. Clemmesen, S. Wuertz
      First page: 466
      Abstract: The RNA/DNA ratio commonly used as proxy for the nutritional condition of fish larvae is affected by RNA degradation during analysis. For evaluation of two strategies to improve RNA integrity, a three‐week feeding trial was carried out to assess the suitability of two nematode species (fam. Panagrolaimidae) as feed for newly hatched carp larvae (Cyprinus carpio) in comparison to Artemia nauplii (Artemia sp.) and a commercial dry feed. Aiming for an increased reproducibility of RNA/DNA determination, a high‐salt inactivation (RNA later) as well as a targeted approach with a recombinant RNase inhibitor were compared to the classical protocol using lab chip technology. Improved RNA integrity was observed with high‐salt inactivation when compared with a strategy applying a specific RNase inhibitor or the classic protocol. Carp larvae fed Artemia for 2 weeks and then dry feed for 1 week revealed the best overall growth performance as well as survival [83.0 ± 35.2 mg fresh weight (FW), 20.0 ± 2.4 mm total length (TL), 86.6 ± 11.7% survival]. Larvae fed the nematode species Panagrellus redivivus for 1 week and subsequently dry feed for 2 weeks (37.4 ± 29.1 mg FW, 14.7 ± 2.8 mm TL, 76.0 ± 6.0% survival) performed better than larvae fed with dry feed alone (28.2 ± 29.6 mg FW, 14.3 ± 2.9 mm TL, 54.3 ± 14.2% survival) or those receiving Panagrellus for 2 weeks. Between both nematode species, Panagrellus was a better feed with regard to growth performance and survival. RNA/DNA ratios ranged between 0.65 ± 0.27 (8 days post‐hatch) and 1.96 ± 0.63 (22 days post‐hatch) and were in the same treatment order as the other growth parameters. RNA/DNA ratios were significantly correlated with the growth rate, and decreasing RNA/DNA ratios in larger larvae may reflect decreasing growth rates with size rather than decreased nutritional status. Here, an improved RNA/DNA ratio protocol is presented in a feeding trial that reveals the suitability of nematodes as a first feed for common carp larvae.
      PubDate: 2015-03-14T03:54:03.424211-05:
      DOI: 10.1111/jai.12715
       
  • Similarities and differences in 13C and 15N stable isotope ratios in two
           non‐lethal tissue types from shovelnose sturgeon Scaphirhynchus
           platorynchus (Rafinesque, 1820)
    • Authors: R. J. DeVries; H. L. Schramm
      First page: 474
      Abstract: We tested the hypothesis that δ13C and δ15N signatures of pectoral spines would provide measures of δ13C and δ15N similar to those obtained from fin clips for adult shovelnose sturgeon Scaphirhynchus platorynchus. Thirty‐two shovelnose sturgeon (fork length [FL] = 500–724 mm) were sampled from the lower Mississippi River, USA on 23 February 2013. Isotopic relationships between the two tissue types were analyzed using mixed model analysis of covariance. Tissue types differed significantly for both δ13C (P  0.05) effects on δ13C. Fin clip δ13C values were highly variable and weakly correlated (r = 0.16, P = 0.40) with those from pectoral spines. We found a significant FL‐tissue type interaction for δ15N, reflecting increasing δ15N with FL for spines and decreasing δ15N with FL for fin clips. These results indicate that spines are not a substitute for fin clip tissue for measuring δ13C and δ15N for shovelnose sturgeon in the lower Mississippi River, but the two tissues have different turnover rates they may provide complementary information for assessing trophic position at different time scales.
      PubDate: 2015-03-21T09:19:34.788132-05:
      DOI: 10.1111/jai.12708
       
  • Feeding ecology and resource sharing patterns between Stellifer rastrifer
           (Jordan, 1889) and S. brasiliensis (Schultz, 1945) (Perciformes:
           Sciaenidae) along the coasts of Paraná and Santa Catarina, Brazil
    • Authors: F. A. Frehse; M. O. Valduga, M. F. M. Corrêa, P. C. Pinheiro, J. R. S. Vitule
      First page: 479
      Abstract: In this study the diet of Stellifer rastrifer and S. brasiliensis were analysed in order to assess the role of resource partitioning between these congeneric, sympatric and abundant species along the coasts of Paraná (25 °55′28″S; 48 °33′35″W) and Santa Catarina (26 °25′55″S; 48 °34′46″W), in southern Brazil. The stomach contents of 240 S. rastrifer specimens (52–195 mm total length) and 167 S. brasiliensis (60–182 mm total length) collected by trawl boat in March of 2006, were analysed to assess the influence of sites, day and night periods as well as the size class in their diet composition. Although crustaceans have been the main resources of both species, S. rastrifer consumed pelagic and epibenthic items, whereas S. brasiliensis also used benthic resources. Results of permanova analysis provided significant evidence for food resource partitioning and confirm the role of feeding changes in the function of morphology (species, P = 0.001), behaviour (day and night, P = 0.024), and ontogeny (size classes, P = 0.001), strategies to reduce competition and to maintain the coexistence of these syntopic species.
      PubDate: 2015-03-25T04:04:01.057972-05:
      DOI: 10.1111/jai.12768
       
  • Saddleback syndrome in yellowfin bream [Acanthopagrus australis
           (Günther, 1859)] in Moreton Bay, Australia: its form, occurrence,
           association with other abnormalities and cause
    • Authors: B.R. Pollock
      First page: 487
      Abstract: The aim of this study was to determine if saddleback syndrome (SBS) in a wild population of yellowfin bream (Acanthopagrus australis) was the result of a developmental defect or caused by physical injury. Information was collected in 2012 on the incidence of SBS and other abnormalities in this species in Moreton Bay, Australia. Abnormalities in adult fish (>250 mm Total Length, TL) with SBS (n = 47) were compared with those without SBS (n = 30). A sample of juvenile fish (n = 404) was checked for the presence of SBS. The results show that scale loss, scale pattern misalignment, lateral line fracture and pectoral fin abnormality were closely associated with SBS. SBS was uncommon (70 mm TL). The reduction in the incidence of SBS from approximately 12% in the larger juveniles to 5% in adults is evidence of mortality associated with SBS.
      PubDate: 2015-04-24T06:25:11.042504-05:
      DOI: 10.1111/jai.12437
       
  • Age and growth of Arno goby, Padogobius nigricans (Canestrini, 1867), in
           the Aggia River (Umbria, Central Italy)
    • Authors: L. Pompei; D. Giannetto, M. Lorenzoni
      First page: 494
      Abstract: In this study, data of Padogobius nigricans, a species endemic to Central Italy, were used to assess the age, growth parameters and condition of this species. Length–weight relationships are also provided and represent the first available reference in the literature for the Arno goby. Data were collected in the Aggia River, a tributary of the Tiber River, by monthly samplings. A total of 780 specimens ranging in size from 1.5 to 9.2 cm were analyzed. Age was assessed by examination of scales, with the maximum age of 4+  years observed in males and 3+ in females. Previous growth was determined by back‐calculation of scale measurements. The von Bertalanffy growth parameters were estimated separately for sexes (males: L∞ = 9.759 cm, k = 0.505, t0 = 0.025, Ф′ = 1.682; females: L∞ = 8.989, k = 0.458, t0 = 0.028; Ф′ = 1.599). Evidence of growth differences between sexes was found, with males living longer and reaching larger sizes. Using the relative condition factor, condition was lower in females than in males, especially during the breeding period due to the strain of high reproduction. Competition with the congeneric P. bonelli, a species endemic to Northern Italy that was introduced in Central Italy, seems not to have been disadvantaged directly by the growth of P. nigricans in the Aggia River, since no selective size‐mortality occurred in the population.
      PubDate: 2015-02-02T23:58:13.033347-05:
      DOI: 10.1111/jai.12689
       
  • Demogenetic structure of brown trout Salmo trutta Linnaeus, 1758
           populations in mountain headwaters: implications for conservation
           management
    • Authors: L. Závorka; P. Horký, J. Kohout, L. Kalous, O. Slavík
      First page: 501
      Abstract: A demogenetic analysis based on 7 years of observation (2005–2011) was conducted to examine the population structure of brown trout Salmo trutta in pristine dendritic headwaters. The value of genetic divergence (FST) among sampling units ranged from −0.03 to 0.16. Demographic synchrony was low or moderate, and the average correlation coefficient of population growth between sampling units (r¯) ranged from 0.28 to 0.66. No isolation by distance was observed, but genetic divergence was negatively correlated with demographic synchrony among sampling units. Variance in the population growth rate (i.e. local extinction probability) increased with distance from the mainstream and from other sampling units. In contradiction with the usual model of stream‐dwelling salmonids, the upstream sections of headwaters holds only ephemeral subpopulations, whereas the mainstream played a role in the source area of the metapopulation. These findings stress the importance of the mainstream in management conservation for brown trout in low productive mountain headwaters.
      PubDate: 2015-03-19T06:34:04.962107-05:
      DOI: 10.1111/jai.12749
       
  • Early development and allometric growth patterns in ide Leuciscus idus
           (Linnaeus 1758)
    • Authors: K. Kupren; D. Żarski, D. Kucharczyk
      First page: 509
      Abstract: Allometric growth and ontogeny were studied in ide Leuciscus idus (L.) reared in laboratory conditions from 0 to 30 days post hatching (DPH), to define important steps in the species’ early life history. Based on the external morphology, eleven different stages during the early development of ide were identified (ES9a – JS1a; ES – embryonic stage, JS – juvenile stage). After a short period of rest, hatched individuals were visual feeders with a pelagic life. Organogenesis and allometric changes indicated that development priorities concerned feeding efficiency, respiration efficiency and locomotion performances. Also concluded was that the gradual changes observed in body proportions (which occurred across a wide range of body lengths) reflect the absence of abrupt changes in the behaviour and habitat and may also be considered as a gradual adaptation to life in flowing water.
      PubDate: 2015-03-14T03:54:20.527839-05:
      DOI: 10.1111/jai.12747
       
  • Effect of dietary fish oil replacement with palm oil on growth
           performance, hematology and liver anti‐oxidative enzymes of juvenile
           Japanese flounder Paralichthys olivaceus (Temminck & Schlegel, 1846)
    • Authors: Y. Z. Han; Z. Q. Jiang, T. J. Ren, S. Koshio, J. Gao, C. F. Komilus, B. Q. Jiang
      First page: 518
      Abstract: A 60‐day feeding trial was conducted to evaluate the effects of dietary palm oil supplements on growth performances, hematology, liver anti‐oxidative enzymes and air exposure resistance of Japanese flounder, Paralichthys olivaceus (initial weights 2.56 ± 0.01 g). Five diets were tested wherein the dietary fish oil was replaced by palm oil at: 0% (Control), 20% (20%), 40% (40%), 50% (50%) and 60% (60%). After the feeding trial, the 20% dietary palm oil was shown to provide similar growth rates and feed efficiency with no negative effects compared to the control group (P > 0.05). Significantly lower growth rates and feed utilization were found in fish fed higher than 40% palm oil in the diet (P  0.05). According to the present results, palm oil is a valuable lipid source substitute in Japanese flounder diets; around 20–40% fish oil can be replaced with palm oil with no negative effects.
      PubDate: 2015-04-01T05:37:03.826599-05:
      DOI: 10.1111/jai.12776
       
  • Improving the performance of a grid used in Norway lobster fisheries
    • Authors: N. Madsen; P. Lewy, J. Feekings, L. A. Krag, R. Frandsen, K. Hansen
      First page: 525
      PubDate: 2015-02-05T00:58:06.968986-05:
      DOI: 10.1111/jai.12693
       
  • Dynamics of biannual spawning behavior in rainbow trout Oncorhynchus
           mykiss (Walbaum, 1792) from southern Chile
    • Authors: N. Colihueque; F. Estay, C. Araneda
      First page: 529
      PubDate: 2015-02-05T01:00:07.25694-05:0
      DOI: 10.1111/jai.12697
       
  • Concurrence of inverted‐papilloma and papilloma in a gold spot pleco
           (Pterygoplichthys joselimaianus Weber, 1991)
    • Authors: H. Rahmati‐holasoo; S. Shokrpoor, H. A. Ebrahimzadeh Mousavi, M. Ardeshiri
      First page: 533
      PubDate: 2015-02-03T00:31:17.139183-05:
      DOI: 10.1111/jai.12701
       
  • Additional record of the Lessepsian Apogon queketti Gilchrist, 1903
           (Osteichthyes: Apogonidae) from the Aegean Sea (Gökova Bay, Turkey)
    • Authors: O. Akyol; V. Ünal
      First page: 536
      PubDate: 2015-02-05T01:01:34.876847-05:
      DOI: 10.1111/jai.12702
       
  • Range extension of Lutjanus inermis (Peters, 1896) (Perciformes:
           Lutjanidae) to the central region of the Gulf of California, Mexico
    • Authors: F. J. Fernández‐Rivera Melo; H. Reyes‐Bonilla, L. Campos‐Dávila, E. F. Balart
      First page: 541
      PubDate: 2015-03-23T02:04:32.439448-05:
      DOI: 10.1111/jai.12750
       
  • Relationships between fish size and otolith measurements for 33 fish
           species caught by bottom trawl in Haizhou Bay, China
    • Authors: X.‐X. Zan; C. Zhang, B.‐D. Xu, C.‐L. Zhang
      First page: 544
      PubDate: 2015-03-14T03:53:47.016875-05:
      DOI: 10.1111/jai.12751
       
  • Length‐weight relationships for 22 neotropical freshwater fishes
           from a subtropical river basin
    • Authors: E. L. Silveira; A. M. Vaz‐dos‐Santos
      First page: 552
      Abstract: This paper presents length‐weight relationships (LWR) for 22 species from the Pitangui River Basin, Brazil. For six of these species these are the first LWR records; for nine other species these are the first LWRs recorded in FishBase.
      PubDate: 2015-02-03T00:28:50.755958-05:
      DOI: 10.1111/jai.12699
       
  • Length–weight relationships of 21 fishes from the Xiangjiang River,
           China
    • Authors: J. Lei; F. Chen, J. Tao, W. Xiong, Y. F. Chen
      First page: 555
      Abstract: This paper provides the length–weight relationships for 21 fish species belonging to four families and 19 genera from the Xiangjiang River, a tributary of the middle Yangtze River in China. Among them, the length–weight relationships for 14 fishes are first‐time reports for FishBase, and new maximum total lengths of 13 fishes are also reported.
      PubDate: 2015-02-03T00:27:55.722035-05:
      DOI: 10.1111/jai.12700
       
  • Length–weight relationships of 33 fish species from New Zealand
    • Authors: R. Crec'hriou; V. Zintzen, L. Moore, C. D. Roberts
      First page: 558
      Abstract: Length–weight relationships are presented for 33 fish species from New Zealand. The parameters a and b of the equation W = aLb were estimated. Parameter b ranged from 2.51 (Pseudocaranx dentex) to 3.51 (Alepocephalus antipodianus) with a mean of 3.12 ± 0.24. Most of these estimates (90.9%) were between 2.8 and 3.4. Maximum lengths and depths of catch are updated for nine species.
      PubDate: 2015-03-06T23:55:25.805427-05:
      DOI: 10.1111/jai.12709
       
  • Length‐weight relationship of Cobitis elongatoides Heckel &
           Kner, 1858 from a pure diploid population in the Nová
           Říše Reservoir, Czech Republic
    • Authors: K. Halačka; L. Pekárik
      First page: 562
      Abstract: This study describes the length‐weight relationship of pure diploid individuals of Cobitis elongatoides from the Nová Říše Reservoir, Czech Republic. The resultant length‐weight relationship was highly dependent on the individuals included, thus the length‐weight relationship of males, small females and large females differed significantly. Furthermore, these relationships varied between sampling seasons. Further studies are planned to test for differences between different ploidy levels.
      PubDate: 2015-03-14T03:41:27.950607-05:
      DOI: 10.1111/jai.12710
       
  • Length‐weight relationships in some populations and species of
           Iranian loaches
    • Authors: H. Nowferesti; S. Asgardun, P. Zare, A. Norooz Rajabi, M. H. Armand, R. Ghorbani
      First page: 565
      Abstract: Length‐weight relationships were estimated for eight species of Iranian loaches. The L‐W parameters for three of the species are given for the first time.
      PubDate: 2015-03-14T03:41:13.398727-05:
      DOI: 10.1111/jai.12711
       
  • Length‐weight relationships of 58 fish species in French Guiana
           streams
    • Authors: L. Allard; A. Toussaint, R. Vigouroux, S. Brosse
      First page: 567
      Abstract: Length‐weight relationship parameters of the form W = aLb are presented for 58 fish species representing 36 genus and 19 families captured in streams of French Guiana. LWRs for 53 of the species are estimated for the first time.
      PubDate: 2015-03-14T03:42:18.844735-05:
      DOI: 10.1111/jai.12712
       
  • Length‐weight relationship and reproductive parameters of Botia
           dario (Hamilton, 1822) in Assam, India
    • Authors: M. K. Das; S. Bordoloi
      First page: 571
      Abstract: The length‐weight relationships, spawning season, sex ratio, size at first maturity and fecundity of Botia dario (Hamilton, 1822), also known as the Bengal loach, were analyzed based on 556 specimens collected from the wetlands of Majuli Island, Assam between June 2012 and May 2013. The sex ratio (M : F) was 1 : 0.68, differing significantly (P 
      PubDate: 2015-03-23T02:01:13.258032-05:
      DOI: 10.1111/jai.12745
       
  • Length‐weight and length‐length relationships of two tropical
           fish Secutor megalolepis (Mochizuki & Hayashi, 1989) and Rhabdamia
           gracilis (Bleeker, 1856) from Sabah, Malaysia
    • Authors: M. A. M. Siddique; A. Arshad, S. M. N. Amin
      First page: 574
      Abstract: Length‐weight relationships (LWRs) and length‐length relationships (LLRs) for two tropical fish species from Marudu Bay, Sabah were studied. Specimens were caught with the traditional ‘Bagan net’ fishing gear from October 2012 to September 2013, using the light trap method. The maximum total length for Rhabdamia gracilis (7.4 cm) reported in this study is a new record for this species. No information regarding length‐weight relationships was reported previously in FishBase for either Secutor megalolepis or Rhabdamia gracilis.
      PubDate: 2015-03-14T03:53:15.457097-05:
      DOI: 10.1111/jai.12752
       
  • Length‐weight relationships for 18 freshwater fish species from the
           Nakdong River in South Korea
    • Authors: J.‐W. Lee; J.‐D. Yoon, J.‐H. Kim, S.‐H. Park, S.‐H. Baek, J.‐J. Yu, M.‐H. Jang, J.‐I. Min
      First page: 576
      Abstract: Length‐weight relationships of 18 freshwater fish species from the Nakdong River in South Korea are presented. Length‐weight relationship data for 10 of these species were not available previously.
      PubDate: 2015-03-21T09:19:36.115592-05:
      DOI: 10.1111/jai.12757
       
  • Length–weight relationships for four Aphanius species of Iran
           (Teleostei: Cyprinodontidae)
    • Authors: H. R. Esmaeili; M. Masoudi, G. Sayyadzadeh, H. R. Mehraban, Z. Gholami, A. Teimori
      First page: 578
      Abstract: Length–weight parameters are presented for four endemic tooth‐carps of the genus Aphanius from Iran.
      PubDate: 2015-03-23T02:19:36.38769-05:0
      DOI: 10.1111/jai.12758
       
  • Length–weight relationship of 37 fish species from the Taquari River
           (Paranapanema Basin, Brazil)
    • Authors: A. B. Nobile; E. M. Brambilla, F. P. Lima, D. Freitas‐Souza, I. L. Bayona‐Perez, E. D. Carvalho
      First page: 580
      Abstract: This work describes the length–weight relationship (LWR) of 37 fish species from the Taquari River, one of the tributaries of the Jurumirim Reservoir in the high Paranapanema Basin, São Paulo, Brazil. Information was not yet available in FishBase on LWRs of 22 of the fish species and maximum weights (Wt) of 24 of the fish species. New maximum standard lengths are presented for nine species as well as weights for two fish species.
      PubDate: 2015-03-17T00:18:09.116812-05:
      DOI: 10.1111/jai.12761
       
  • Length–weight relationships of four Cyprinid species in India
    • Authors: S. P. Das; S. Swain, D. Bej, P. Jayasankar, J. K. Jena, P. Das
      First page: 583
      Abstract: Length–weight relationships are reported for four Indian carps. The length–weight relationship was W = 0.01123L3.355 for Cirrhinus mrigala, W = 0.07354L3.299 for Catla catla, W = 0.04066L3.313 for Labeo rohita and W = 0.11489L2.732 for Labeo fimbriatus. LWR estimates for C. mrigala and L. fimbriatus had not been previously reported in FishBase.
      PubDate: 2015-03-14T03:53:30.25306-05:0
      DOI: 10.1111/jai.12762
       
  • Length–weight relationships of six fish species from an Indus basin
           tributary in the Poonch region of Jammu and Kashmir, India
    • Authors: N. K. Sharma; J. I. Mir, N. N. Pandey, R. Singh, A. Bashir, M. S. Akhtar
      First page: 585
      Abstract: Length–weight relationships are described for six fish species belonging to two families from the Poonch River, a tributary of the Jhelum River (Tributary of Indus Basin), India. Length–weight relationships for the six species were unknown to FishBase, and new maximum lengths are recorded for five of the species. These results will be useful for fishery research, management and conservation of the Indus Basin.
      PubDate: 2015-03-21T09:19:53.660227-05:
      DOI: 10.1111/jai.12764
       
 
 
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