Journal of fish biology最新文献_第2页

Life-stage and environmental influences on the recruitment of African freshwater eels into the uThukela River, South Africa. 非洲淡水鳗鱼进入南非乌图克拉河的生命阶段和环境影响。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-30 DOI: 10.1111/jfb.70239

Rory McNeill, Matthew J Burnett, Céline Hanzen, Colleen T Downs

{"title":"Life-stage and environmental influences on the recruitment of African freshwater eels into the uThukela River, South Africa.","authors":"Rory McNeill, Matthew J Burnett, Céline Hanzen, Colleen T Downs","doi":"10.1111/jfb.70239","DOIUrl":"https://doi.org/10.1111/jfb.70239","url":null,"abstract":"Anguillid eel recruitment into east-flowing rivers along the east coast of Africa is poorly understood. The few harvest records of anguillid eels from South Africa have highlighted anthropogenically derived environmental stressors as risks for further decline. Our study aimed to determine environmental conditions and elver development associated with eel recruitment in the uThukela River, KwaZulu-Natal, South Africa. Our study was conducted between November 2021 and September 2022 and compared the effect of high- and low-flow conditions and the associated environmental variables on eel recruitment. We captured 519 eels and identified 220 (42%) which were classified into three species (Anguilla bengalensis n = 51, Anguilla marmorata n = 60 and Anguilla mossambica n = 120). We captured glass eels (n = 461) and elvers (n = 36), and included transitioning individuals (n = 22) between the stages. All eels were caught in high-water-flow conditions, which supports the hypothesis that eels prefer high water flow for recruitment, which usually occurs in rainy, warm austral summer months. We found a significant difference between the body lengths of the three identified species. We found a significant difference between the life stages present, which was primarily between glass eel and elver, with the transitional phase grouping in body length relative to glass eel body length. Our results highlighted the need to improve field identification of glass eels. In addition, an in-depth understanding of the recruitment trends for African freshwater eels in east-flowing rivers is needed.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145199647","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

Exploring morphological variation and evolutionary adaptation during biological invasions in fish. 探讨鱼类在生物入侵过程中的形态变异和进化适应。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-30 DOI: 10.1111/jfb.70237

Eva Záhorská, Mária Balážová, Rodolphe E Gozlan

{"title":"Exploring morphological variation and evolutionary adaptation during biological invasions in fish.","authors":"Eva Záhorská, Mária Balážová, Rodolphe E Gozlan","doi":"10.1111/jfb.70237","DOIUrl":"https://doi.org/10.1111/jfb.70237","url":null,"abstract":"Morphological variability plays a key role in the establishment and spread of invasive fish species, influencing essential life functions and adaptability to new environments. In this study, we examined the morphological diversity of the topmouth gudgeon, Pseudorasbora parva (Temminck & Schlegel, 1846), across both its native and invasive ranges to assess patterns of evolutionary adaptation during its invasive process. Our findings reveal remarkable morphological plasticity across all studied populations, regardless of geographic origin or climatic conditions. Notably, populations from Taiwan and Japan exhibit significantly larger mouth gapes, potentially reflecting differences in feeding ecology. A distinct north-south gradient in fin morphology was also observed, with northern populations displaying shorter dorsal and pectoral fins. Meanwhile, European populations exhibit greater morphological fragmentation, shaped by a complex interplay of evolutionary history, genetic divergence and environmental pressures. These results underscore the role of morphological adaptation in invasion dynamics and highlight how phenotypic plasticity contributes to the ecological success of P. parva in novel environments.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145199580","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

Peruvian Chondrichthyes biodiversity, marketing and conservation: a synthesis of current knowledge. 秘鲁软骨鱼生物多样性、营销和保护：当前知识的综合。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-29 DOI: 10.1111/jfb.70227

Sarita Campos-León, Sebastián Hernández-Muñoz, Bryan L Huerta-Beltrán, Fabiola Zavalaga, Adriana Cevallos-Garcias, Nicolás Ehemann

{"title":"Peruvian Chondrichthyes biodiversity, marketing and conservation: a synthesis of current knowledge.","authors":"Sarita Campos-León, Sebastián Hernández-Muñoz, Bryan L Huerta-Beltrán, Fabiola Zavalaga, Adriana Cevallos-Garcias, Nicolás Ehemann","doi":"10.1111/jfb.70227","DOIUrl":"https://doi.org/10.1111/jfb.70227","url":null,"abstract":"Peru hosts a diverse chondrichthyan fauna due to its unique oceanographic conditions, including the convergence of the Humboldt Current and the South Equatorial Current. Despite historical research on Peruvian chondrichthyans, taxonomic updates and conservation concerns warrant a revised checklist. This study provides an updated and systematic compilation of chimaeras, sharks and rays recorded in Peruvian waters, including marine and freshwater species. A total of 110 species were confirmed, comprising seven chimaeras, 56 sharks and 47 rays, categorised into 67 genera, 40 families and 13 orders. Several species previously listed for Peru were excluded due to unreliable records or taxonomic revisions. Additionally, we assess the commercial exploitation and conservation status of chondrichthyans, identifying species subject to national regulations and international trade under CITES. Our findings provide a comprehensive update on Peruvian chondrichthyan biodiversity, highlighting the need for continuous monitoring, taxonomic validation and conservation strategies to ensure their sustainable management.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145191505","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

First documentation of gravid Alopias vulpinus (Bonnaterre, 1788) in the southeastern Pacific: Evidence for a potential maternal corridor. 在东南太平洋发现的第一个怀孕的Alopias vulpinus (Bonnaterre, 1788)：潜在的母性走廊的证据。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-29 DOI: 10.1111/jfb.70243

Sarita Campos-León, Fabiola Zavalaga, Bryan L Huerta-Beltrán, Stevens Lucero-Perez, Nicolas R Ehemann

引用次数: 0

The elusive spinetail devil ray (Mobula mobular): a multimethod approach to track its presence in the Spanish Mediterranean Sea. 难以捉摸的棘尾魔鬼鳐（Mobula mobular）：一种多种方法来追踪它在西班牙地中海的存在。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-29 DOI: 10.1111/jfb.70241

Pol Carrasco-Puig, Ana I Colmenero, Eduard Degollada, Beatriu Tort, David Jara, Núria Marco, Jordi Ruiz-Olmo, Francesc Carbonell, Claudio Barría

{"title":"The elusive spinetail devil ray (Mobula mobular): a multimethod approach to track its presence in the Spanish Mediterranean Sea.","authors":"Pol Carrasco-Puig, Ana I Colmenero, Eduard Degollada, Beatriu Tort, David Jara, Núria Marco, Jordi Ruiz-Olmo, Francesc Carbonell, Claudio Barría","doi":"10.1111/jfb.70241","DOIUrl":"https://doi.org/10.1111/jfb.70241","url":null,"abstract":"Along the coastal regions of the Mediterranean Sea, certain pelagic elasmobranchs seasonally occur, such as the endangered spinetail devil ray (Mobula mobular). Given its current conservation status, these occurrences hold significant scientific interest. Therefore, this study examined spinetail devil ray occurrences in a data-deficient region of the Spanish Mediterranean coast, exclusively using opportunistic records from citizen science and cetacean sighting boat surveys. A total of 101 occurrences, involving 141 individuals, were reported since 2020, with 2024 documenting the most (n = 83) and summer being the most prominent season overall (n = 89). Scientifically relevant behaviours, including feeding, breaching, courtship and parturition, were identified from these occasional occurrences. These findings suggest that this north-western Mediterranean Sea region may be important for the spinetail devil ray. Moreover, they highlight the necessity of adopting a multidisciplinary and collaborative approach, particularly integrating citizen science, into further research on this species along the Spanish coast.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145191528","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

Measuring fish cognition: empirical-based guidance for designing cognition assays. 测量鱼的认知：基于经验的设计认知分析的指导。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-28 DOI: 10.1111/jfb.70240

Nick A R Jones, Joachim G Frommen, Theodora Fuss, Cait Newport, Cairsty DePasquale, Michael M Webster, Catarina Vila-Pouca, Libor Závorka, Anne Gro Vea Salvanes

引用次数: 0

Food intake of early juvenile western Baltic cod (Gadus morhua) during settlement transition. 西部波罗的海鳕鱼早期幼鱼在定居过渡时期的食物摄取量。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-24 DOI: 10.1111/jfb.70234

Anton Höper, Nicole Funk, Felix Mittermayer, Axel Temming, Steffen Funk

{"title":"Food intake of early juvenile western Baltic cod (Gadus morhua) during settlement transition.","authors":"Anton Höper, Nicole Funk, Felix Mittermayer, Axel Temming, Steffen Funk","doi":"10.1111/jfb.70234","DOIUrl":"https://doi.org/10.1111/jfb.70234","url":null,"abstract":"This study examines the gut contents of 203 early juvenile Atlantic cod [17-101 mm ± 18.48 mm standard deviation (SD)] from the Western Baltic Sea (ICES Subdivision 22) collected between 2020 and 2022. According to the observed prey (proportion of pelagic, intermediate and benthic items) in the cod guts, settlement transition from a pelagic to a benthic lifestyle is estimated to take place at 46-87 mm cod total length (TL). Copepod species were the preferred prey item of pelagic feeding juvenile cod, dominated by the genus Acartia, which is also the most abundant copepod genus in the area. With increasing cod size, Centropages spp. and Cladocera species were favoured. Intermediate prey consisted mostly of late bivalve veliger larvae. Although a switch from planktonic to intermediate prey was not observable in every cod individual (probably due to differences in prey availability between years and stations), our results showed that especially at the beginning of the demersal life, all examined cod relied almost exclusively on the Cumacean species Diastylis rathkei. Its importance to cod during the settlement transition is in accordance with earlier findings from the same and adjacent areas highlighting it as potential key, but also bottleneck, species for cod recruitment success. Because D. rathkei is highly sensitive to low oxygen conditions, and oxygen minimum zones are spreading in the Western Baltic Sea, the decreasing access to D. rathkei as prey might be a contributing factor to the low recruitment success of cod in recent years.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145137792","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

Electronic pulse device deters and delays shark feeding in a depredation context. 电子脉冲装置阻止和延迟鲨鱼捕食的情况下进食。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-24 DOI: 10.1111/jfb.70220

John Morris, Valerie Hagan, Kaitlin Harrington, Demian Chapman

{"title":"Electronic pulse device deters and delays shark feeding in a depredation context.","authors":"John Morris, Valerie Hagan, Kaitlin Harrington, Demian Chapman","doi":"10.1111/jfb.70220","DOIUrl":"https://doi.org/10.1111/jfb.70220","url":null,"abstract":"Fishers losing their catch or gear to marine predators ('depredation'), including sharks, is a growing problem around the world. Several types of devices have been tested to deter sharks from engaging in depredation but with limited success. Captive bonnethead sharks, Sphyrna tiburo L. 1758 (N = 8), were used to test the effectiveness of a recently developed electronic pulse device (EPD) to deter or delay shark depredation. Individuals were paired and exposed to either an active (battery in) or inactive (battery out) EPD connected to bait on a rod and reel (N = 198 paired trials). When an active EPD was used, the bait was ingested in 46.4% of the trials compared to 92.1% of the trials when an inactive EPD was used. When the bait was ingested, the sharks took significantly longer to feed when using the active EPD than when using the inactive EPD (Wilcoxon rank-sum test, p < 0.001). Individuals exhibited significantly more 'rapid withdrawal' responses to the active EPDs compared to the inactive EPDs (Fisher's exact test, p < 0.001). EPDs show promise to deter or delay sharks from feeding for a short period and may therefore be an effective tool for reducing depredation in situations where catches are quickly pulled from the water (e.g. rod and reel, handline, pole-and-line fisheries).","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145137769","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

Seaward movements and mortality of Atlantic salmon Salmo salar L. kelts in the Penobscot River, Maine. 缅因州佩诺布斯科特河大西洋鲑鱼的向海运动和死亡率。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-24 DOI: 10.1111/jfb.70233

Carolyn A Merriam, Danielle M Frechette, Joseph D Zydlewski

{"title":"Seaward movements and mortality of Atlantic salmon Salmo salar L. kelts in the Penobscot River, Maine.","authors":"Carolyn A Merriam, Danielle M Frechette, Joseph D Zydlewski","doi":"10.1111/jfb.70233","DOIUrl":"https://doi.org/10.1111/jfb.70233","url":null,"abstract":"The Atlantic salmon Salmo salar L. is an endangered species in the United States, but post-spawn downstream movements remain poorly understood. We conducted a 2-year acoustic telemetry study to characterize downstream movements and to quantify apparent mortality and downstream passage of post-spawn adults (kelts) in the Penobscot River, Maine, USA (N = 112). The majority of tagged S. salar kelts (54%) exhibited a rapid movement seaward post-release instead of overwintering in the river. Salmo salar kelts that overwintered exhibited two patterns, distinguished by whether a dam was present or not. We found no relationship between post-release movement pattern, sex, body condition index or release year. Estimated apparent mortality rates were high (83%), with a greater probability of mortality occurring near the dams and release site. Apparent mortality rate did not differ by sex, body condition or year, but it was greater for individuals that moved out directly post-release and less for those that overwintered. While our results may suggest that overwintering in the river is a favourable pattern for survival, these results may be related to the closures of the designated downstream passages at the first two dams encountered by S. salar kelts. In fact, 55% of S. salar kelts passed a dam when the designated passages were closed. Altogether, these results may demonstrate the complex nature of downstream passage for S. salar kelts, particularly when having to navigate multiple dams.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145137728","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

Comparative analysis of differentially acetylated proteins between Antarctic white-blooded Chionodraco hamatus and red-blooded Trematomus bernacchii. 南极白血螯虾与红血螯虾乙酰化蛋白差异的比较分析。

IF 2 3区农林科学

Journal of fish biology Pub Date : 2025-09-22 DOI: 10.1111/jfb.70203

Ruonan Jia, Wanying Zhai, Shaojun Huang, Boyu Chen, Ruiqin Hu, Shouwen Jiang, Qianghua Xu

{"title":"Comparative analysis of differentially acetylated proteins between Antarctic white-blooded Chionodraco hamatus and red-blooded Trematomus bernacchii.","authors":"Ruonan Jia, Wanying Zhai, Shaojun Huang, Boyu Chen, Ruiqin Hu, Shouwen Jiang, Qianghua Xu","doi":"10.1111/jfb.70203","DOIUrl":"https://doi.org/10.1111/jfb.70203","url":null,"abstract":"Protein acetylation is a critical post-translational modification that regulates a wide range of cellular functions. The Antarctic icefish, which lack haemoglobin and functional red blood cells, serves as a unique model to explore the impact of acetylation on haematopoiesis and cold-adaptive epigenetic mechanisms. Despite its relevance, the specific acetylation mechanisms in Antarctic fish remain poorly understood. In this study, we utilized a comprehensive methodology combining tandem mass tag labelling, high-performance liquid chromatography fractionation, Kac antibody affinity enrichment and liquid chromatography-tandem mass spectrometry to quantify and compare acetylation patterns in the haematopoietic tissues of the head kidney between a white-blooded icefish Chionodraco hamatus and a red-blooded species Trematomus bernacchii. A total of 167 acetylation sites on lysine residues were identified across 77 differentially acetylated proteins, including 10 proteins with upregulated acetylation and eight proteins with downregulated acetylation between the two species. Kyoto Encyclopedia of Genes and Genomes pathway analysis of these proteins indicated significant enrichment in the 'Cell proliferation and cell cycle', 'P53 signaling pathway', and 'FoxO signaling pathway' for the upregulated acetylated proteins in the icefish head kidney, while 'Systemic lupus erythematosus pathways' and 'Gene regulation pathways' were found in the downregulated proteins. Furthermore, a marked reduction in acetylation of the histone H2B type 1-M-like (H2B) protein was observed in the icefish head kidney, potentially reflecting the species' extremely low red blood cell production. This study represents the first detailed exploration of protein acetylation in Antarctic fish and provides valuable insights into the epigenetic adaptations of marine vertebrates to cold environments.","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145124696","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