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Evidence of extensive multispecies macrofouling in Eckström's topknot Zeugopterus regius (Bonnaterre, 1788), Pleuronectiformes, Scophthalmidae J. Fish Biol. (IF 2.0) Pub Date : 2024-03-16 John Davenport, Agnès Dettaï, Bruno Chanet
Diverse and extensive macrofouling of the left‐hand (eyed) side has been observed in multiple films and photographs of different specimens of Eckström's topknot Zeugopterus regius. Identified foulers include macroalgae and tunicates. Photographs of unfouled specimens and preserved juveniles have also been inspected. Macrofouling is not universal in this species; unfouled fish were observed around the
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They grow up so fast, especially when global warming is concerned. J. Fish Biol. (IF 2.0) Pub Date : 2024-03-16 William Bernard Perry
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Does phenology influence predation rate on Salmo trutta parr during lake migration? J. Fish Biol. (IF 2.0) Pub Date : 2024-03-16 Richard J. Kennedy, James Barry, Adele Boyd, Michelle Allen
Acoustic tags fitted with predation sensors, which trigger following ingestion by piscivorous predators, were used to compare direct predation rates during downstream migration (out‐migration) of potamodromous (freshwater) brown trout (Salmo trutta L.) parr from their natal river into a large freshwater lake system during spring and autumn. Thirty‐eight spring migrants were tagged across two study
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Can denticle morphology help identify southeastern Australian elasmobranchs? J. Fish Biol. (IF 2.0) Pub Date : 2024-03-16 Mariah Appleby, Vincent Raoult, Matt K. Broadhurst, Troy Gaston
Elasmobranchs are covered in scale‐like structures called dermal denticles, comprising dentine and enameloid. These structures vary across the body of an individual and between species, and are frequently shed and preserved in marine sediments. With a good understanding of denticle morphology, current and historical elasmobranch diversity and abundance might be assessed from sediment samples. Here
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Structural and ultrastructural aspects of the skin of large yellow croaker Larimichthys crocea J. Fish Biol. (IF 2.0) Pub Date : 2024-03-16 Chenchen Shi, Shi Xi Chen
The skin color of the large yellow croaker (Larimichthys crocea) is a crucial indicator to determine its economic value. However, the location of pigment cells in the skin structure is uncertain. To determine the pigment cell type in the skin, the vertical order and ultrastructure of pigment cells were examined using light microscopy and transmission electron microscopy. Both dorsal and ventral skins
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Comparing methods for determining the metabolic capacity of lumpfish (Cyclopterus lumpus Linnaeus 1758) J. Fish Biol. (IF 2.0) Pub Date : 2024-03-15 Rachel M. Eisenberg, Rebeccah M. Sandrelli, Anthony Kurt Gamperl
Lumpfish (Cyclopterus lumpus) mortalities have been reported during the summer at some North Atlantic salmon cage‐sites where they serve as “cleaner fish.” To better understand this species' physiology and whether limitations in their metabolic capacity and thermal tolerance can explain this phenomenon, we compared the aerobic scope (AS) of 6°C‐acclimated lumpfish (~50 g and 8.8 cm in length at the
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Factors influencing migration of short‐finned eels (Anguilla australis) over 3 years from a wetland system, Lake Condah, south‐east Australia, downstream to the sea J. Fish Biol. (IF 2.0) Pub Date : 2024-03-14 Wayne Koster, Ben Church, David Crook, David Dawson, Ben Fanson, Justin O'Connor, Ivor Stuart
Anguillid eel populations are under threat globally. A particularly vulnerable life‐cycle stage is the migration of mature adult eels downstream from freshwater habitats through estuaries into the sea to spawn. This study investigated the factors associated with downstream migration of the short‐finned eel Anguilla australis (Richardson 1841) from a coastal wetland (Lake Condah) in south‐east Australia
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Redescription of Cyprinion muscatense (Teleostei: Cyprinidae) with the first phylogenetic analysis of the genus J. Fish Biol. (IF 2.0) Pub Date : 2024-03-14 Hamid Reza Esmaeili, Amir Hassan Masoumi, Golnaz Sayyadzadeh, Fatah Zarei, James Maclaine
Members of the genus Cyprinion (Cypriniformes: Cyprinidae) are found in the Indus River basin west to the Arabian Peninsula and the Tigris‐Euphrates River drainages (Persian Gulf basin). The taxonomic status of Cyprinion including Cyprinion muscatense is poorly understood when compared to other cyprinid genera. C. muscatense has been considered as a member of the Cyprinion watsoni‐microphthalmum group
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On the occurrence of a post‐larval specimen of Brosme brosme (Gadiformes: Lotidae) on Porcupine Bank (west Ireland) J. Fish Biol. (IF 2.0) Pub Date : 2024-03-13 Francisco Baldó, Alejandro De Carlos, Rafael Bañón
The occurrence of a small specimen of Brosme brosme (Gadiformes: Lotidae) from the Porcupine Bank is reported. A single specimen with a total length of 73.2 mm was caught with bottom trawl at a depth of 322 m depth in 2017. The specimen was identified morphologically and confirmed by molecular taxonomy using DNA barcoding. Based on the size and ontogenetic characters found, the specimen was identified
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Early ontogenesis from embryo to juvenile in Senegalese sole Solea senegalensis under laboratory conditions J. Fish Biol. (IF 2.0) Pub Date : 2024-03-13 Liming Liu, Jun Zeng, Jiulong Wang, Yan Liu, Weiping Mei, Yanqin Wu, Chengwu Wang, Wengang Xu
Senegalese sole, Solea senegalensis, is a flatfish of high commercial value in the world. It has been identified as an interesting and promising species for marine commercial aquaculture diversification in Europe for at least four decades and was introduced to China in 2003. Early ontogenesis from embryo to juvenile stages in S. senegalensis was analysed under controlled laboratory conditions to provide
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Shoals in troubled waters? The impact of rising temperatures on metabolism, foraging, and shoaling behavior in mixed‐species shoals J. Fish Biol. (IF 2.0) Pub Date : 2024-03-12 Ishani Mukherjee, Anuradha Bhat
Rising water temperatures across aquatic habitats, in the current global climate change scenario, can directly affect metabolism and food intake in fish species. This can potentially alter their physiological, behavioral, and shoaling properties. In the current study, we examined the effects of high temperatures on metabolism, foraging, and shoaling in tropical fish. Mixed‐species (comprising flying
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Variable trends in the distribution of Atlantic cod (Gadus morhua) in the Celtic seas J. Fish Biol. (IF 2.0) Pub Date : 2024-03-12 Jonathan V. Ellis, Pia Schuchert, D. Michael Scantlebury, C. Tara Marshall, Paul G. Fernandes
Despite decades of active fisheries management, many stocks of Atlantic cod in its southern range are in a depleted state and mortality estimates remain high. Recovery of these stocks, as defined by management areas, could be confounded by cod distributions shifting outside of these areas. Here, we assess data from internationally coordinated trawl surveys to investigate the distribution of three cod
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Post‐settlement dynamics of Japanese flounder Paralichthys olivaceus in Tango Bay: Seasonal patterns in growth, mortality, and recruitment potential J. Fish Biol. (IF 2.0) Pub Date : 2024-03-09 Chaitanya K. Bhandare, Keita W. Suzuki, Reiji Masuda, Yoh Yamashita
Japanese flounder Paralichthys olivaceus is one of the most valuable coastal flatfish species in East Asia. To investigate post‐settlement growth and mortality, juveniles were sampled in Tango Bay (Japan) weekly throughout the settlement period in 2007 and 2008. Otolith (lapillus) microstructure analysis enabled the categorization of juveniles into six biweekly cohorts each year. Later cohorts exhibited
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First evidence of prickly shark, Echinorhinus cookei Pietschmann 1928, aggregation on seamounts in the eastern Pacific, Panama J. Fish Biol. (IF 2.0) Pub Date : 2024-03-08 Hector M. Guzman, Candy K. Real, Stefanie Kaiser
In May 2022, twelve prickly sharks, Echinorhinus cookei Pietschmann 1928, were sighted at 151–350 m depth in the Cordillera de Coiba seamounts, Pacific Panama. This discovery expands our knowledge of the distribution and habitat use of this rare deep‐sea species. It underscores the potential significance of the Cordillera de Coiba seamounts, an offshore marine protected area, as a critical habitat
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Population structure and reproductive indicators of the surubim Pseudoplatystoma punctifer (Siluriformes, Pimelodidae) in the São Miguel River, Amazon basin, Brazil J. Fish Biol. (IF 2.0) Pub Date : 2024-03-07 Jordy de Oliveira Dias, Fabrício Berton Zanchi, Diego Maia Zacardi, Lucas Silva Oliveira, Sandro de Vargas Schons, Raniere Garcez Costa Sousa
Fish is an important source of food and income for a significant portion of the Amazonian population, especially those who live along the rivers and lakes in the region. Pseudoplatystoma punctifer (Castelnau, 1855), known as surubim, is a species of Neotropical catfish widely exploited by fisheries and commercially valuable in the Guaporé River basin, Brazil. However, population dynamics are poorly
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Integrative taxonomy of metazoan parasites of the bluntnose sixgill shark Hexanchus griseus (Bonnaterre, 1788) in the Mediterranean Sea, with the resurrection of Grillotia acanthoscolex Rees, 1944 (Cestoda: Trypanorhyncha) J. Fish Biol. (IF 2.0) Pub Date : 2024-03-07 Alejandro Lopez‐Verdejo, Marialetizia Palomba, Fabio Crocetta, Mario Santoro
Appropriate diagnoses of parasites of apex marine predators are crucial to understand their biodiversity, host specificity, biogeography, and life cycles. Such diagnoses are also informative of ecological and biological characteristics of both host and environment in which the hosts and their parasites live. We here (i) investigate the parasite fauna of a bluntnose sixgill shark Hexanchus griseus (Bonnaterre
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Analysis of the genetic structure of the introduced clearhead icefish (Protosalanx chinensis) populations in northern China J. Fish Biol. (IF 2.0) Pub Date : 2024-03-06 Yi Zheng, Fujiang Tang, Xianhu Zheng, Rongbin Na, Zhe Li, Wanqiao Lu, Cuiyun Lu
When species are introduced to a new environment, they can quickly adapt to the environment and may differ from the indigenous species. The indigenous population of Protosalanx chinensis has a high level of genetic diversity, but it is unclear on the genetic diversity of the introduced populations in northeast China, which supports the major production of P. chinensis in the world. A total of 556 individuals
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Vertebral microchemistry as an indicator of habitat use of the oceanic whitetip shark Carcharhinus longimanus in the central and eastern Pacific Ocean J. Fish Biol. (IF 2.0) Pub Date : 2024-03-06 Yongfu Shen, Nigel E. Hussey, Mboglen David, Feng Wu, Yunkai Li
The oceanic whitetip shark, Carcharhinus longimanus, is a highly migratory, epipelagic top predator that is classified as critically endangered. Although this species is widely distributed throughout the world's tropical oceans, its assumed mobility and pelagic behavior limit studies to derive required lifetime data for management. To address this data deficiency, we assessed variation in the habitat
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Brobdingnagians and Goliaths: two forms of gigantism in fish J. Fish Biol. (IF 2.0) Pub Date : 2024-02-29 Daniel Pauly, Elaine Chu, Johannes Müller
Two forms of gigantism are differentiated in fish, Brobdingnagian and Goliathan gigantism, the former applying to populations whose individuals are all larger than is typical for the taxon, the latter to single individuals within a population. While Brobdingnagian gigantism is largely explained by various ecological and evolutionary rules, Goliathan gigantism is not. A mechanistic hypothesis is proposed
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Embracing prospects for reducing the numbers of animals used in aquaculture research J. Fish Biol. (IF 2.0) Pub Date : 2024-03-01 Carlo C. Lazado, Elisabeth Ytteborg, Chris Noble
The principles of three Rs—REPLACEMENT, REDUCTION, and REFINEMENT—govern the protection and use of animals, including fish, for research purposes in the European Union and Norway. In this paper, we discuss some straightforward steps to simplify the delivery of these principles at the idea stage and adapt some of these examples for conducting fish trials related to health and welfare. Although some
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Atlantic salmon Salmo salar do not prioritize digestion when energetic budgets are constrained by warming and hypoxia J. Fish Biol. (IF 2.0) Pub Date : 2024-03-01 Barbara Nuic, Alyssa Bowden, Craig E. Franklin, Rebecca L. Cramp
During summer, farmed Atlantic salmon (Salmo salar) can experience prolonged periods of warming and low aquatic oxygen levels due to climate change. This often results in a drop in feed intake; however, the physiological mechanism behind this behaviour is unclear. Digestion is a metabolically expensive process that can demand a high proportion of an animal's energy budget and might not be sustainable
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Yellowtail damselfish Chrysiptera parasema can associate predation risk with the acoustic call of a heterospecific damselfish following pairing with conspecific alarm cues J. Fish Biol. (IF 2.0) Pub Date : 2024-02-28 Kathryn A. Hanson, Brooke A. Mauland, Ananda Shastri, Brian D. Wisenden
The ability to detect and respond to the presence of predation risk is under intense selection, especially for small-bodied fishes. Damselfishes (Pomacentridae) use auditory vocalizations during inter- and intrasexual interactions, but it is not known if they can use vocalizations in the context of predator–prey interactions. Here, we test if yellowtail damselfish, Chrysiptera parasema, can learn to
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Size at sexual maturity, seasonal variation by maturity stages, and fecundity of the spotted round ray (Urobatis maculatus) and the thorny stingray (Urotrygon rogersi) from the northern tropical eastern Pacific J. Fish Biol. (IF 2.0) Pub Date : 2024-02-28 Alain García-Rodríguez, Javier Tovar-Ávila, A. Hiromi Arellano-Cuenca, David Rivas-Landa, Darío A. Chávez-Arrenquín, Felipe Amezcua
Round rays (family: Urotrygonidae) are commonly caught as by-catch by shrimp trawl fisheries in the tropical eastern Pacific (TEP). However, little information on their life history and catch species composition exists for most round ray species, preventing the evaluation of the impact of fishing on their populations. The mean size at sexual maturity (DW50), seasonal variation by maturity stages, and
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Upper thermal tolerance and population implications for the Magdalena River stingray Potamotrygon magdalenae J. Fish Biol. (IF 2.0) Pub Date : 2024-02-29 Daniela Gómez‐Martínez, Edgardo Londoño‐Cruz, Paola Andrea Mejía‐Falla
Knowledge of thermal tolerance limits provides important clues to the capacity of a species to withstand acute and chronic thermal changes. Climate models predict the increase and intensification of events such as heat waves, therefore understanding the upper thermal limits that a species can tolerate has become of utmost importance. We measured the upper thermal tolerance of the endemic Magdalena
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Advances in life-history knowledge for 35 seahorse species from community science J. Fish Biol. (IF 2.0) Pub Date : 2024-02-26 Elsa Camins, Lily M. Stanton, Miguel Correia, Sarah J. Foster, Heather J. Koldewey, Amanada C. J. Vincent
Marine community science presents an important route to gather valuable scientific information while also influencing local management and policy, thus contributing to marine conservation efforts. Because seahorses are cryptic but charismatic species, they are good candidates for engaging diverse people to help overcome the many gaps in biological knowledge. We have synthesized information contributed
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Spatial fish distribution in autumn in a shallow mesotrophic lake, assessed by hydroacoustic surveys, trawling, and beach seining J. Fish Biol. (IF 2.0) Pub Date : 2024-02-25 Tomáš Jůza, Milan Muška, Petr Blabolil, Luboš Kočvara, Zuzana Sajdlová, Janis Dumpis, Ruta Medne
Day and nighttime autumn fish abundance and biomass were studied in the pelagic and littoral zones of Lake Sauka in Latvia. Both pelagic methods (hydroacoustics and trawling) revealed significantly higher fish abundance and biomass during the day than at night, especially in deeper zones (below 3 m). Roach (Rutilus rutilus) and Eurasian perch (Perca fluviatilis) dominated the trawl catches during the
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Mitogenomic evidence of population differentiation of thorny skate, Amblyraja radiata, in the North Atlantic J. Fish Biol. (IF 2.0) Pub Date : 2024-02-25 John S. S. Denton, Jeff Kneebone, Lei Yang, Arve Lynghammar, David McElroy, Shannon Corrigan, Klara Jakobsdóttir, Carolyn Miri, Mark Simpson, Gavin J. P. Naylor
Management of thorny skate (Amblyraja radiata) in the Northwest Atlantic has posed a conservation dilemma for several decades due to the species' lack of response to strong conservation efforts in the US Gulf of Maine and the Canadian Scotian Shelf, confusion over the relationship between two reproductive size morphs of differing life histories that are sympatric in the Northwest Atlantic, and conflicting
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Diet with optimal glutathione supplement improves growth, nonspecific immunity, intestinal microbiota, and antioxidant ability in Micropterus salmoides J. Fish Biol. (IF 2.0) Pub Date : 2024-02-28 Chuanyu Xiong, Yuyu Chi, Bei Wang, Jianhua Yi, Yongyao Yu, Yun Li, Hua Ye, Jiyuan Yin, Ronghua Wu
In this study, Micropterus salmoides were fed with dietary glutathione (GSH, 0, 100, 300, and 500 mg/kg) for 56 days to investigate its effects on growth performance, serum nonspecific immunity, liver antioxidant capacity, tissue morphology, and intestinal microbiota. The results showed that the survival rate, weight gain rate, and specific growth rate and condition factor increased, whereas the feed
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Research advances in diversity and conservation science of freshwater fish in China J. Fish Biol. (IF 2.0) Pub Date : 2024-02-28 Shan Li, Hui Wei, Gordon H. Copp
In China, as elsewhere, freshwater fishes are facing considerable threats due to climate change and anthropogenic activities, including habitat modification, water pollution, over-fishing, and non-native fish introductions (Best, 2019; Feio et al., 2023). As a result, the taxonomic, genetic, and functional diversities of freshwater fishes in China have been negatively impacted. To fulfill China's Biodiversity
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Fish fauna and environmental factors in river estuaries of small and medium‐sized rivers on islands significantly influenced by warm currents J. Fish Biol. (IF 2.0) Pub Date : 2024-02-26 Rei Itsukushima, Yuichi Kano
River estuaries are influenced by terrestrial and marine areas, and have a unique environment that is constantly fluctuating. They are also important habitats for biodiversity conservation. Tanegashima Island is significantly influenced by the Kuroshio Current. Although nearby Yakushima Island has been recognized as a World Natural Heritage site and information on many species has been collected, there
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Method dependency of maximum oxygen uptake rate and its repeatability in the Gulf killifish, Fundulus grandis J. Fish Biol. (IF 2.0) Pub Date : 2024-02-26 Samantha D. Brieske, Sylvia C. Mullen, Bernard B. Rees
The maximum rate at which fish can take up oxygen from their environment to fuel aerobic metabolism is an important feature of their physiology and ecology. Methods to quantify maximum oxygen uptake rate (ṀO2), therefore, should reliably and reproducibly estimate the highest possible ṀO2 by an individual or species under a given set of conditions (peak ṀO2). This study determined peak ṀO2 and its repeatability
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Coercive mating has no impact on spatial learning, cognitive flexibility, and fecundity in female porthole livebearers (Poeciliopsis gracilis) J. Fish Biol. (IF 2.0) Pub Date : 2024-02-25 Tiffany R. Ernst, R. M. H. W. Hogers, A. Korosi, J. L. van Leeuwen, A. Kotrschal, Bart J. A. Pollux
Coercive mating is a sexual selection strategy that is likely to influence female cognition. Female harassment levels have been linked to altered brain gene expression patterns and brain size evolution, suggesting females may respond to coercive mating by investing energy into “outsmarting” males. However, females exposed to coercive males have decreased foraging efficiency and likely increased stress
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First observation of a skate egg case nursery in the Ross Sea J. Fish Biol. (IF 2.0) Pub Date : 2024-02-25 Brittany Finucci, Caroline Chin, Helen L. O'Neill, William T. White, Matthew H. Pinkerton
Areas of importance to Southern Ocean skates are poorly defined. Here, we identify a deepwater skate egg case nursery in a discrete location at ~460 m depth off Cape Adare in the Southern Ocean. This is the first confirmed observation of a skate nursery area in the Ross Sea and only the second observation for the Southern Ocean. The morphology and size of the egg cases were consistent with the genus
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Antibacterial activity in egg samples from small-spotted catshark Scyliorhinus canicula and nursehound Scyliorhinus stellaris: A preliminary investigation J. Fish Biol. (IF 2.0) Pub Date : 2024-02-22 Elena Martinengo, Primo Micarelli, Francesca Romana Reinero, Fabrizio Bertelloni, Filippo Fratini
The study aims to identify antibacterial properties in unfertilized eggs of Scyliorhinus canicula and Scyliorhinus stellaris. Despite challenging marine conditions, these eggs retain their integrity for extended periods and remain unaffected by pathogens. The antibacterial activity was measured using minimum inhibitory and minimum bactericidal concentration analysis. The eggs of S. stellaris exhibited
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Identification of Isthmin-1 in common carp (Cyprinus carpio. L) and the effects on glucose metabolism in vivo and in vitro J. Fish Biol. (IF 2.0) Pub Date : 2024-02-19 Leya Qu, Liping Yang, Yiran Wang, Shaoyang Zhi, Mengjuan Zhao, Jinrui Xiong, Xiao Yan, Chaobin Qin, Guoxing Nie
Isthmin-1 (Ism1) plays roles in glucose uptake in mammals as an adipokine. To investigate its role in the glucose metabolism of common carp (Cyprinus carpio. L), the Ism1 sequence was cloned, and its expression and distribution in tissues were detected. In addition, we prepared and purified the recombinant Ism1 protein using the E. coli expression system and assessed changes in the expression of key
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Linkage between spatiotemporal distribution of environmental DNA and phenological activity in an amphidromous fish, ayu Plecoglossus altivelis altivelis, in a river located in its northernmost distributional area J. Fish Biol. (IF 2.0) Pub Date : 2024-02-18 Takuma Yonago, Tatsuya Kawakami, Akihide Kasai
Environmental DNA (eDNA) is a promising tool for the continuous monitoring of fish ecology and diversity. However, its potential for describing the phenological activity of fish has rarely been examined. This study aimed to elucidate a linkage between the spatiotemporal distribution of eDNA and the phenology of an amphidromous fish, ayu Plecoglossus altivelis altivelis, in a river in Hokkaido, Japan
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The effect of swimming activity and feed restriction of rainbow trout (Oncorhynchus mykiss) on water quality and fish‐plant growth performance in aquaponics J. Fish Biol. (IF 2.0) Pub Date : 2024-02-20 Gökhan Tunçelli, Devrim Memiş
In this study, we investigated the effects of swimming activity and feed restriction on juvenile rainbow trout (Oncorhynchus mykiss) in decoupled aquaponic systems. Our focus was on assessing their impact on water quality parameters within the aquaponic setup and evaluating the growth performance of the fish, including final weight (FW), condition factor (K), coefficient of variation (c.v.) in weight
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Invasion status of hatchery‐origin pink salmon in an unstocked river at the Shiretoko World Natural Heritage Site in northern Japan J. Fish Biol. (IF 2.0) Pub Date : 2024-02-20 Taihei Yamada, Takahiro Nobetsu, Hirokazu Urabe, Futoshi Nakamura
Hatchery fish and their offspring (including hatchery‐wild hybrids) have lower reproductive success than wild fish. Thus, the straying of hatchery fish may negatively impact wild populations, depending on the number of wild salmon returning and hatchery strays. We investigated the straying status of hatchery‐origin pink salmon (Oncorhynchus gorbuscha), which have a higher straying rate than other salmonids
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Resurrection and redescriptions of nominal species previously regarded as synonyms of Thrissina mystax (Bloch and Schneider, 1801) (Teleostei: Clupeiformes: Engraulidae) J. Fish Biol. (IF 2.0) Pub Date : 2024-02-15 Harutaka Hata, Sébastien Lavoué
Examination of the original descriptions and available type specimens of nominal species previously regarded as synonyms of Thrissina mystax (Bloch and Schneider, 1801), and many non-type specimens representing an extensive geographic range, confirmed the validities of T. mystax, Thrissina porava (Bleeker, 1849), and Thrissina valenciennesi (Bleeker, 1866). Additionally, Engraulis poorawah Bleeker
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Daily age, growth rate, and pelagic larval duration of commercially important snapper species in Abrolhos National Marine Park J. Fish Biol. (IF 2.0) Pub Date : 2024-02-13 Jeane Campos Silva, Marcelo Soeth, Carlos Werner Hackradt, Andre Lima, Fabiana Cézar Félix-Hackradt
The age and daily growth of fish are registered through the deposition of increments in their otoliths, which are concretions formed by the precipitation of substances present in the endolymphatic fluid, mainly calcium carbonate (CaCO3). Faced with the need to fill some of the gaps in the knowledge on the occurrence and duration of the initial stages of snapper species' life cycles in the Abrolhos
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The impact of dissolved oxygen concentration on the swimming performance and welfare of ballan wrasse (Labrus bergylta Ascanius, 1767) J. Fish Biol. (IF 2.0) Pub Date : 2024-02-13 Katie Gaffney, Erik Burgerhout, Åsa Espmark, Ingrid Lein
Sea lice (Lepeophtheirus salmonis [Krøyer, 1838]) are a key issue for salmon aquaculture, contributing to increased mortality for both wild and farmed salmon if no action is taken. Using cleaner fish can be an effective, drug-free treatment method, and ballan wrasse (Labrus bergylta) is a hardy wrasse species that displays cleaning behavior. With concerns about the overharvest of wild ballan wrasse
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Morphochromatic spectrum through gonad development stages of the razor surgeonfish, Prionurus laticlavius (Valenciennes, 1846) (Actinopterygii: Acanthuriformes) J. Fish Biol. (IF 2.0) Pub Date : 2024-02-13 Fernando A. Aguilar-Santana, Juan Jacobo Schmitter-Soto, Gabriela Lucano-Ramírez, Omar Hernando Avila-Poveda, Marcial Arellano-Martínez
Gonad development stages (GDS) are a critical tool that can be easily applied in fisheries to visually discriminate mature from immature organisms and assess their reproductive condition. This study proposes a morphochromatic scale to define gonad development stages for razor surgeonfish (Prionurus laticlavius) based on morphological and structural assessments of the gonad, histologically validated
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Morphology and motor behavior of endemic fishes in the upper reaches of the Yangtze River basin J. Fish Biol. (IF 2.0) Pub Date : 2024-02-08 Shikang Liu, Chengyang Cao, Yuqian Xi, Pengcheng Li, Xuefeng Chen, Lirong Xiao, Weiwei Yao
Dam construction alters the hydrodynamic conditions, consequently impacting the swimming behavior of fish. To explore the effect of flow hydrodynamics on fish swimming behavior, five endemic fish species in the upper Yangtze River basin were selected. Through high-speed video visualization and computer analysis, these species' swimming patterns under different flow velocities (0.1–1.2 m/s) were investigated
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First records of the sicklefin (Mobula tarapacana), bentfin (Mobula thurstoni), and spinetail (Mobula mobular) devil rays in the Chagos Archipelago J. Fish Biol. (IF 2.0) Pub Date : 2024-02-08 Joanna L. Harris, Claire Collins, Mark Spalding, Guy M. W. Stevens
Recent encounters with sicklefin (Mobula tarapacana) and bentfin (Mobula thurstoni) devil rays in the Chagos Archipelago provide the first confirmed observations of live specimens of these species in this region. Examination of illegal fishing photo archives collected during enforcement revealed these endangered species, and spinetail devil rays (Mobula mobular), are being caught within the archipelago's
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Limited effects of culling on the behavior of invasive lionfish (Pterois miles) in the Mediterranean J. Fish Biol. (IF 2.0) Pub Date : 2024-02-12 Elizabeth W. Phillips, Davide Bottacini, Anna N. M. Schoonhoven, Ynze J. J. Kamstra, Hannah De Waele, Carlos Jimenez, Louis Hadjioannou, Alexander Kotrschal
Invasive species pose serious threats to ecosystems. To reduce ecological and economic consequences of invasions, efforts are made to control invaders and evaluating the effects of such efforts is paramount. Lionfishes (Pterois volitans and Pterois miles) are native to the Indo-Pacific Ocean and pose a major threat to local ecosystems in the invaded Atlantic and Mediterranean. Culling via spearfishing
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Gross morphology of the brain and some sense organs of subterranean pencil catfishes of the genus Ituglanis Costa and Bockmann, 1993 (Siluriformes, Trichomycteridae), with a discussion on sensory compensation versus preadaptation in subterranean fishes J. Fish Biol. (IF 2.0) Pub Date : 2024-02-11 Pedro P. Rizzato, Maria Elina Bichuette
Subterranean organisms provide excellent opportunities to investigate morphological evolution, especially of sensory organs and structures and their processing areas in the central nervous system. We describe the gross morphology of the brain and some cephalic sensory organs (olfactory organ, eye, semicircular canals of the inner ear) and the swim bladder (a non-sensory accessory structure) of subterranean
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Gordon H. Copp: An obituary J. Fish Biol. (IF 2.0) Pub Date : 2024-02-08 J. Robert Britton, Ali Serhan Tarkan
Gordon Copp, who died recently at the age of 67 years, will need no introduction to many contributors to the Journal of Fish Biology due to his extensive collaborative network and his work as treasurer of the Fisheries Society of the British Isles (FSBI) for 8 years (2005–2013). After suffering periods of illness over the past decade, he passed away on Saturday, July 8, 2023, leaving his wife Elisabeth
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Early ontogeny of the freshwater fish Rhytiodus microlepis (Characiformes, Anostomidae) from the Amazon basin J. Fish Biol. (IF 2.0) Pub Date : 2024-02-05 Darliane C. Santos, Lucas S. Oliveira, Fabíola K. S. Silva, Ruineris A. Cajado, Diego M. Zacardi
The early development of the freshwater fish Rhytiodus microlepis is characterized by the description of external morphological, meristic, and morphometric changes, as well as the growth patterns, thereby establishing a reference for the identification of its larvae and juveniles. Specimens were collected from the Amazon river channel and floodplain. Ninety-seven individuals were analysed with standard
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I spy: Factors influencing the observation of oxytetracycline in calcified structures of fishes viewed using standard light and fluorescence microscopy J. Fish Biol. (IF 2.0) Pub Date : 2024-02-04 Meredith B. Pfennig, Derek P. Crane, Nate G. Smith, Dave L. Buckmeier
The antibiotic oxytetracycline (OTC) is a fluorochrome marker, and fluorescence microscopy is used to view OTC marks in fishes' calcified structures. However, OTC marks have been observed in calcified structures using standard light microscopy for multiple species. Therefore, we conducted an experiment to investigate potential factors (i.e., season, total length of fish, growth rate, and sex) influencing
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Feeding ecology of the short-headed lanternfish Diaphus brachycephalus and Warming's lanternfish Ceratoscopelus warmingii (Myctophidae) in the South China Sea J. Fish Biol. (IF 2.0) Pub Date : 2024-02-04 Yuyan Gong, Jun Zhang, Yutao Yang, Yane Jiang, Shuai Zhang, Han Tian, Zuozhi Chen
We report on the feeding ecology of two species, the short-headed lanternfish Diaphus brachycephalus and Warming's lanternfish Ceratoscopelus warmingii, using data collected over five surveys from 2015 to 2017 in the open South China Sea. D. brachycephalus feed mainly on copepods, with few differences in food composition between different-sized individuals; the diet of C. warmingii is more diverse
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Retinal ganglion cell topography and spatial resolving power in the pajama cardinalfish Sphaeramia nematoptera (Bleeker, 1856) J. Fish Biol. (IF 2.0) Pub Date : 2024-02-02 Igor Pushchin, Naig Aleskerov
We studied the topography of retinal ganglion cells (GCs) and estimated spatial resolving power (SRP) in the pajama cardinalfish Sphaeramia nematoptera (Bleeker, 1856), a relatively small brightly colored fish inhabiting coral reefs and lagoons in the Western Pacific. S. nematoptera is an active night predator feeding on near-bottom animal plankton and benthos. DAPI staining was used to label nuclei
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Water temperature at the time of the catch-and-release event is a better predictor of survival in Atlantic salmon (Salmo salar) than acute water temperature changes before and after J. Fish Biol. (IF 2.0) Pub Date : 2024-02-02 Travis E. Van Leeuwen, Donald Keefe, Mark Young, Blair Adams
Despite studies on the effect of catch-and-release on the survival of Atlantic salmon (Salmo salar) being widespread in the literature, studies to date have failed to evaluate the potential role of thermal history. Herein, we show that despite cooler conditions post-release, 4/18 (22%) salmon died when caught-and-released at water temperatures ≥20°C, whereas 1/13 (8%) salmon caught-and-released at
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An equatorial mid-Atlantic Ocean archipelago as nursery area for the cookiecutter shark: Investigating foraging strategies of neonates through bite mark inferences J. Fish Biol. (IF 2.0) Pub Date : 2024-02-01 Lucas Santos, João V. Veloso, Theresa B. Santos, Natalia P. A. Bezerra, Paulo Oliveira, Fabio H. V. Hazin
This study delves into the foraging ecology of the cookiecutter shark (Isistius brasiliensis) in the Saint Peter and Saint Paul Archipelago (SPSPA), assessing bite marks on pelagic fishes collected between March and September 2018. Examination of 200 individuals from five species revealed the shark's predilection for targeting adult fish, ensuring efficient removal of energy-rich tissue layers. However
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Otolith sectioning reveals higher maximum age in greater weever (Trachinus draco) J. Fish Biol. (IF 2.0) Pub Date : 2024-01-27 Monica Mion, Alessandro Orio, Johan Lövgren, Francesca Vitale, Massimiliano Cardinale
Growth and maximum age are two key parameters that inform resilience of fish populations to exploitation. Existing information on those for greater weever inhabiting the eastern North Sea is based on the analysis of whole otoliths. Here, we present a reanalysis using sectioned otoliths. The results reveal a different growth pattern and a higher maximum age than that previously reported. The higher
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Predictability and conceptual repeatability of the predator-associated burst speed ecophenotype in western mosquitofish (Gambusia affinis) J. Fish Biol. (IF 2.0) Pub Date : 2024-01-26 Rose C. Blanchard, Thomas J. DeWitt, Sharmila Young, Joshuah S. Perkin
Predation exerts strong selection pressure on morphological traits and is often studied in freshwater fishes. A common morphological ecophenotype driven by predation from pursuit predators is the predator-associated burst speed (PABS) ecophenotype. This ecophenotype, characterized by a smaller head, smaller body, and larger caudal region, is commonly found in western mosquitofish (Gambusia affinis)
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Water velocity shapes fish movement behavior J. Fish Biol. (IF 2.0) Pub Date : 2024-01-25 William D. Hintz, Anthony P. Porreca, James E. Garvey
Stream and river ecosystems present fluvial fishes with a dynamic energy landscape because moving water generates heterogeneous flow fields that are rarely static in space and time. Fish movement behavior should be consistent with conserving energy in these dynamic flowing environments, but little evidence supporting this hypothesis exists. Here, we tested experimentally whether three general movement
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Heat shocks during egg incubation led to developmental, morphological, and behavioral differences in Arctic charr (Salvelinus alpinus) J. Fish Biol. (IF 2.0) Pub Date : 2024-01-23 François-Raphaël Lubin, Emilie Réalis-Doyelle, Laurent Espinat, Jean Guillard, Allan Raffard
Temperature variation is affecting fish biodiversity worldwide, causing changes in geographic distribution, phenotypic structure, and even species extinction. Incubation is a critical stage for stenothermic species, which are vulnerable to large temperature fluctuations, and its effects on the phenotype at later developmental stages are understudied, despite the fact that the phenotype being essential
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Effects of glutamine on growth performance, nutrient content, fatty acid profile, and blood parameters of rainbow trout (Oncorhynchus mykiss) J. Fish Biol. (IF 2.0) Pub Date : 2024-01-23 Mustafa Öz, Burak Evren Inanan, Tahir Karasahin, Suat Dikel
In this study, different amounts of glutamine were added to the diet of rainbow trout, and they were then fed for a period of 90 days. The current research investigated the effects of glutamine on various aspects of rainbow trout, including growth performance, condition factor, viscerosomatic index, hepatosomatic index, carcass composition, fatty acid profile, hematological parameters, and biochemical