Journal of fish biology最新文献_第7页

Cold storage of alarm substance reduces the behavioural stress response of zebrafish (Danio rerio). 警报物质的冷藏降低了斑马鱼的行为应激反应。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-27 DOI: 10.1111/jfb.70200

Heather Barnes, Mariah A Dougherty, Brandon C Vera, Jason A Kaufman

引用次数: 0

Development of a non-lethal stomach content analysis method for freshwater eels: An empirical evaluation of the tube method for Anguilla marmorata. 一种淡水鳗鱼非致死胃内容物分析方法的发展：对黑鳗管法的经验评价。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-27 DOI: 10.1111/jfb.70198

Tatsuhiko Maeda, Hikaru Itakura, Ryoshiro Wakiya, Shingo Kimura

{"title":"Development of a non-lethal stomach content analysis method for freshwater eels: An empirical evaluation of the tube method for Anguilla marmorata.","authors":"Tatsuhiko Maeda, Hikaru Itakura, Ryoshiro Wakiya, Shingo Kimura","doi":"10.1111/jfb.70198","DOIUrl":"https://doi.org/10.1111/jfb.70198","url":null,"abstract":"Understanding the feeding habits of predatory fish is essential for unravelling food web structures and implementing conservation strategies in riverine ecosystems. However, conventional lethal stomach content analysis methods are not necessarily appropriate for long-term dietary studies, particularly for threatened species, as they require large sample sizes due to the inability to repeatedly analyse stomach contents from the same individuals. This study aimed to develop and validate a non-lethal stomach content analysis method using tubes for the giant mottled eel Anguilla marmorata, a representative tropical anguillid species. A total of 205 eels were collected from nine rivers on Amami-Ohshima Island, Japan. Among 102 eels, including stomach contents, the tube method achieved an average removal efficiency of 76.5% (biomass content) and a detection rate of 92.4% for prey categories, effectively capturing dietary composition without significant bias. The most important food items were prawns (mainly Macrobrachium), crabs and fish, but aquatic insects, terrestrial invertebrates and a few snails were also eaten. Although crabs were less efficiently removed due to their body size or hard exoskeletons, supplementary use of forceps allowed complete collection of their stomach contents. The removal efficiency was not significantly influenced by eel size, stomach fullness or prey type, suggesting broad applicability of this method. Our findings demonstrate that the tube method, combined with forceps when necessary, offers a powerful non-lethal tool for investigating individual-level feeding ecology of anguillid eels, enabling long-term dietary monitoring and supporting conservation of declining populations. This method will advance ecological understanding and sustainable management of anguillid eels and their freshwater habitats, and this is especially true for tropical eels whose feeding ecology has rarely been studied.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functional divergence of fabp genes in common carp and the effects of high-fat diets supplemented with linalool on growth, fatty acid composition and fabp gene expressions. 鲤鱼fabp基因功能分化及高脂饲料添加芳樟醇对生长、脂肪酸组成和fabp基因表达的影响

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-27 DOI: 10.1111/jfb.70177

Celal Erbaş, Selma Saoula, Mehtap Bayır, Burcu Naz Uzun, Serpil Turhan, Oğuz Taşbozan, Hürrem Arslan, Harun Arslan, Abdulkadir Bayır

{"title":"Functional divergence of fabp genes in common carp and the effects of high-fat diets supplemented with linalool on growth, fatty acid composition and fabp gene expressions.","authors":"Celal Erbaş, Selma Saoula, Mehtap Bayır, Burcu Naz Uzun, Serpil Turhan, Oğuz Taşbozan, Hürrem Arslan, Harun Arslan, Abdulkadir Bayır","doi":"10.1111/jfb.70177","DOIUrl":"https://doi.org/10.1111/jfb.70177","url":null,"abstract":"The fatty acid-binding protein (fabp) genes involved in β-oxidation were identified and characterized in the common carp (Cyprinus carpio) genome. Fish were then fed high-fat diets supplemented with various amounts of linalool, a natural peroxisome proliferator-activated receptor α ligand, for 9 weeks. We determined that C. rapio genome contains 19 fabp genes. The mRNA expression of 4R-whole genome duplication copies of fabp genes was differently regulated by the diets, except for fabp3a.1/fabp3a.2 and fabp7a.1/fabp7a.2. These findings indicate that the transcriptional regulatory mechanisms governing nutritional regulation by linalool-supplemented diets for these specific genes do not show significant differences. Linalool-supplemented diets markedly changed fatty acid composition in the liver and muscle. They also played a positive role in mitigating adverse health effects associated with high-fat diets in common carp. Conversely, the highest lipid amount in the liver was found in fish fed high-fat diet 3, which also had the lowest feed conversion ratio. We concluded that the effects of linalool as a feed additive in common carp are limited. However, detailed studies with various linalool concentrations in different weights of common carp and other farmed fish species should be conducted to reach a more definitive result.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using citizen science to overcome data gaps in artisanal fisheries: programme overview and spatiotemporal patterns. 利用公民科学克服手工渔业的数据缺口：项目概述和时空模式。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-26 DOI: 10.1111/jfb.70197

J Wesley Neal, Tony Yon, Ratha Sor, Sitha Som, Peter J Allen, Sandra B Correa

{"title":"Using citizen science to overcome data gaps in artisanal fisheries: programme overview and spatiotemporal patterns.","authors":"J Wesley Neal, Tony Yon, Ratha Sor, Sitha Som, Peter J Allen, Sandra B Correa","doi":"10.1111/jfb.70197","DOIUrl":"https://doi.org/10.1111/jfb.70197","url":null,"abstract":"Artisanal fisheries contribute substantial animal protein to people in many developing countries, yet government resources for fisheries management are limited and typically allocated to larger commercial operations. This leaves artisanal fisheries vulnerable to overfishing and other anthropogenic threats. A co-management arrangement, whereby government agencies delegate management authority to fishing communities, is a solution. However, local communities lack standardised data required for informed management. To address this information gap, we developed a citizen science programme for artisanal community fishery jurisdictions of the Sre Ambel River freshwater system in southern Cambodia. We recruited 15 fishers from four villages distributed within the drainage to collect year-round data on their fishing activity and catch. Herein, we describe the implementation of the programme and use the first complete year of data to determine the current harvest characteristics of the Sre Ambel River system on both spatial and seasonal scales. Fishers captured 153 fish species belonging to 109 genera, 62 families and 25 orders or series, comprising 75,702 individual fish, with an overall catch rate of 3.75 fish per hour. Catch varied across space and time, particularly in species richness and catch rates. Effort was significantly higher during the wet season, despite greater catch rates and species richness during the dry season. These data can be used to evaluate the fishery response to future management actions, allowing for an adaptable approach to management. Furthermore, this standardised data collection through a citizen science programme, paired with a co-management approach, may serve as a model for other systems where management investment is limited, such as other South-East Asia counties, Latin America and the Caribbean, Africa and small island developing states.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ontogenetic niche segregation and its implications for mercury levels in Japanese anchovy from the high seas of the northwestern Pacific Ocean as revealed by fatty acid analysis. 脂肪酸分析揭示了西北太平洋公海日本凤尾鱼个体发育生态位分离及其对汞含量的影响。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-25 DOI: 10.1111/jfb.70175

Long Chen, Zhenfang Zhao, Guanyu Hu, Liling Zhang, Bilin Liu, Xinjun Chen

{"title":"Ontogenetic niche segregation and its implications for mercury levels in Japanese anchovy from the high seas of the northwestern Pacific Ocean as revealed by fatty acid analysis.","authors":"Long Chen, Zhenfang Zhao, Guanyu Hu, Liling Zhang, Bilin Liu, Xinjun Chen","doi":"10.1111/jfb.70175","DOIUrl":"https://doi.org/10.1111/jfb.70175","url":null,"abstract":"Japanese anchovy (Engraulis japonicus) is a small pelagic fish that is frequently targeted by commercial fisheries. Japanese anchovy plays a crucial role as a vital link between primary and higher-order consumers. The elemental mercury in Japanese anchovy muscles easily bioaccumulates and is transmitted to top predators. We investigated the variation in the diets and mercury accumulation of Japanese anchovy in the high seas of the northwestern Pacific Ocean. We measured the amounts of mercury and fatty acids in the muscles of 149 Japanese anchovy specimens that were obtained from the open seas of the northwestern Pacific Ocean (39°2' N ~ 42°30' N, 154°02' E ~ 161°29' E) between June and July 2021. The results revealed that the monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) contents significantly decreased and then increased with the growth of Japanese anchovy (p < 0.001). The standard ellipse-corrected area (SEAc) calculated from the fatty acid profiles showed a decreasing and subsequently increasing pattern with anchovy growth. Trophic niche overlap reflects the degree of overlap in diet composition among species. Compared to the niche overlap among the 91-105, 106-120 and 121-135 mm groups, the niche overlap of Japanese anchovy between the 121-135 and 136-150 mm groups was lower. This change may indicate a dietary shift in Japanese anchovy with a body length of 120 mm. Mercury levels were positively correlated with C22:6n3, C20:4n6 and C20:1n9 contents and negatively correlated with C16:1n7 contents. We suggest that the proportion of higher-trophic zooplankton in the diet increased with the growth of Japanese anchovy, and that zooplankton was likely an important cause of the increase in mercury levels.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Refocusing the role of DNA technology towards a sustainable seafood supply. 重新聚焦DNA技术在可持续海产品供应中的作用。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-20 DOI: 10.1111/jfb.70192

Stefano Mariani

引用次数: 0

Individual identification of bony fishes using unique body markings: Implications and applications. 使用独特身体标记的硬骨鱼个体识别：意义和应用。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-20 DOI: 10.1111/jfb.70180

Katie Dunkley, Samuel R Matchette, Cheuk Yu Hau, Christian Drerup, Roxanne B Holmes, Yvonne Sadovy de Mitcheson, James E Herbert-Read

{"title":"Individual identification of bony fishes using unique body markings: Implications and applications.","authors":"Katie Dunkley, Samuel R Matchette, Cheuk Yu Hau, Christian Drerup, Roxanne B Holmes, Yvonne Sadovy de Mitcheson, James E Herbert-Read","doi":"10.1111/jfb.70180","DOIUrl":"https://doi.org/10.1111/jfb.70180","url":null,"abstract":"The natural variation in animal body markings, such as spots, stripes and blotches, offers a powerful tool for researchers, conservationists, citizen scientists and resource managers to distinguish specific individuals within species. By building libraries of photo-identified individuals, we can track and differentiate individuals over time and space, thereby non-invasively and often cost-effectively studying species' biology and behaviour. This, in turn, enhances our understanding of species' ecological roles, and informs and supports effective conservation strategies. Although photo-identification has been successfully applied to various aquatic species, including cetaceans, sharks and rays, it remains surprisingly underutilised for bony fishes. Indeed, despite their striking diversity of colours and patterns, relatively few studies have used natural markings to non-invasively investigate bony fish biology and conservation. In this review, we highlight the potential of photo-identification as a valuable research and management tool for these fishes in both field and laboratory environments. We outline the scientific, practical and ethical benefits of this approach, illustrating how individual identification can advance our understanding of fish biology and support their conservation efforts. We also discuss previous applications of photo-identification in bony fishes, examine barriers to its broader adoption and address common misconceptions that may limit its use. We propose strategies to overcome these challenges driven by advancements in camera technology and artificial intelligence, and discuss scenarios where photo-identification may prove particularly effective. Through this review, we therefore aim to encourage the broader use of natural body markings as a non-invasive method in bony fish research, management and conservation.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hidden in the gut: Metabarcoding reveals overlooked predation by the invasive European catfish (Silurus glanis). 隐藏在肠道中：元条形码揭示了入侵的欧洲鲶鱼（Silurus glanis）被忽视的捕食行为。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-19 DOI: 10.1111/jfb.70152

Mafalda Moncada, Sofia Nogueira, Diogo Ribeiro, João Gago, Miguel Rodrigues, Maria Judite Alves, Maria Filomena Magalhães, Manuel Curto, Filipe Ribeiro

{"title":"Hidden in the gut: Metabarcoding reveals overlooked predation by the invasive European catfish (Silurus glanis).","authors":"Mafalda Moncada, Sofia Nogueira, Diogo Ribeiro, João Gago, Miguel Rodrigues, Maria Judite Alves, Maria Filomena Magalhães, Manuel Curto, Filipe Ribeiro","doi":"10.1111/jfb.70152","DOIUrl":"10.1111/jfb.70152","url":null,"abstract":"Morphological and metabarcoding analyses provided new insights into the diet of the European catfish (Silurus glanis) in an invaded area in the Iberian Peninsula. Out of 264 S. glanis examined, data were obtained for 173 individuals through metabarcoding of intestinal contents and for 110 through morphological analysis of stomach contents. Metabarcoding consistently identified more prey taxa per sample than morphological analysis, yielding a total of 34 and 21 taxa, respectively, that primarily included fish and crustaceans. Morphological analysis demonstrated a higher detection of crustaceans than metabarcoding, which detected more fish. Both methods identified native Anguilla anguilla, Chelon spp., Luciobarbus spp. and Atyaephyra desmarestii as well as non-native Lepomis gibbosus as the most frequent prey. However, metabarcoding detected A. anguilla at more than twice the frequency found by morphological analysis, and other endangered taxa that were missed by morphological analysis. Metabarcoding showed that prey composition was influenced by both season and predator total length, suggesting dietary shifts related to prey availability and foraging habits. Taken together, results indicate that metabarcoding may be important for assessing the full range of prey diversity and uncover patterns in prey use, particularly fish, providing more information from fewer samples compared to morphological analysis and can contribute to conservation management. Metabarcoding results suggest that predation by the S. glanis on endangered and economically valuable fish such as A. anguilla, Alosa spp. may be stronger than previously considered.These findings reinforce the urgent need for targeted management actions to mitigate the impacts of S. glanis in the Iberian Peninsula, where many native and endemic species are currently threatened.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144883000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An ichthyological borderland: The fishfauna of Nyungwe National Park and surroundings (Rwanda, East Africa). 鱼类学的边界地带：纽恩威国家公园及其周边地区（东非卢旺达）的鱼类动物群。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-19 DOI: 10.1111/jfb.70185

Heleen Maetens, Paul Ndakala Mukungilwa, Aventino Kasangaki, Arthur F Boom, Theodore Nshimiyumuremyi, Philippe Sanzira Munyandamutsa, Viola Clausnitzer, Nathan Vranken, Jos Snoeks, Maarten Van Steenberge

{"title":"An ichthyological borderland: The fishfauna of Nyungwe National Park and surroundings (Rwanda, East Africa).","authors":"Heleen Maetens, Paul Ndakala Mukungilwa, Aventino Kasangaki, Arthur F Boom, Theodore Nshimiyumuremyi, Philippe Sanzira Munyandamutsa, Viola Clausnitzer, Nathan Vranken, Jos Snoeks, Maarten Van Steenberge","doi":"10.1111/jfb.70185","DOIUrl":"10.1111/jfb.70185","url":null,"abstract":"Nyungwe National Park (NP) is a mountainous region situated in the southwestern part of Rwanda on Congo-Nile watershed. In spite of the high biodiversity in primates, birds and plants, no fish were reported to occur in the park, probably because of the cold temperatures of the rivers. An expedition in 2022 examined the fish diversity within the Nyungwe NP and its buffer zones. Additional sampling was performed in the main river draining the park into Lake Kivu: the Kamiranzovu. Three hundred and twenty specimens belonging to 13 species were collected. Specimens were collected only in the western part of the park, draining towards the Congo basin. The diversity within the park proper was limited to two putative species within the complex of Amphilius cf. kivuensis, which were caught on either side of the Kivu-Rusizi watershed. In contrast, a higher fish diversity, including one clariid species and two species of Enteromius, was observed in the rivers at a lower altitude of the buffer zone. However, the highest species diversity was found near the mouth of Kamiranzovu River, including 11 species, of which 4 were non-native: the guppy Poecilia reticulata, Astatotilapia burtoni, the blue-spotted tilapia Oreochromis leucosticus and the Egyptian mouth-brooder Pseudocrenilabrus multicolor.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144882999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrative taxonomy suggests hidden diversity within the fish genus Cyttopsis (Zeiformes, Parazenidae). 综合分类学表明，胞藻属（拟胞藻目，拟胞藻科）中存在隐藏的多样性。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-08-19 DOI: 10.1111/jfb.70190

Rafael Bañón, Francisco Baldó, Juan Carlos Arronte, Alejandro de Carlos, José-Daniel Barreiro-Vázquez, Ángel Sebastián Comesaña, David Barros-García

{"title":"Integrative taxonomy suggests hidden diversity within the fish genus Cyttopsis (Zeiformes, Parazenidae).","authors":"Rafael Bañón, Francisco Baldó, Juan Carlos Arronte, Alejandro de Carlos, José-Daniel Barreiro-Vázquez, Ángel Sebastián Comesaña, David Barros-García","doi":"10.1111/jfb.70190","DOIUrl":"10.1111/jfb.70190","url":null,"abstract":"Nine specimens of Cyttopsis rosea (Zeiformes: Parazenidae) were collected during scientific surveys at three different locations in the northeast Atlantic. All nine specimens were included in the molecular analysis, adding new cytochrome c oxidase subunit I sequences to public databases. Of these, six specimens were retained for detailed morphological examination. Morphological measurements and counts agree with previous descriptions and confirm the identification of C. rosea. However, molecular species delimitation analyses suggested cryptic diversity, identifying three molecular operational taxonomic units, contrary to the current status of a single species with a worldwide distribution. The integration of classical and molecular taxonomy proved essential for accurately delimiting and characterizing this species, enhancing our understanding of its intraspecific morphological and molecular variability. A literature review of the available morphological data of Cyttopsis rosea between Atlantic and Pacific specimens showed differences in the caudal peduncle length, number of vertebrae and the number of scales in the lateral line, which could support the existence of different species. Based on the resulting data and the available literature, an updated key of the accepted members of the family Parazenidae is provided.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144873417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0