Journal of fish biology最新文献

{"title":"No evidence of evolutionary impact from size-selective harvesting on epigenetic and reproductive molecular markers in zebrafish (Danio rerio) gonads.","authors":"Laia Ribas, Marcela Salazar, Robert Arlinghaus, Valerio Sbragaglia","doi":"10.1111/jfb.70216","DOIUrl":"https://doi.org/10.1111/jfb.70216","url":null,"abstract":"<p><p>This study investigates whether size-selective harvesting induced heritable changes reflected in epigenetic and reproductive molecular markers in zebrafish (Danio rerio), thereby indicating potential evolutionary responses. We used an experimental harvest model where zebrafish populations were subjected to five generations of size-selective harvesting, followed by eight generations without harvesting in a controlled environment to examine evolutionarily fixed outcomes in response to harvest selection. We assumed the evolutionary adaptations to size-selection to have left a molecular legacy related to sexual development, as previous studies have shown that evolution of reproductive timing is a common response to size-selection. To that end, we examined the expression of specific genes related to sexual development, such as dmrt1 and cyp19a1a, and epigenetic markers, including dnmt1 and dnmt3b, in the gonads in those experimental lines selected for this study. Additionally, global DNA methylation patterns were analysed to explore potential long-term epigenetic changes associated with size-selection. The results revealed no significant differences in gene expression related to sexual development or epigenetics between the size-selected and control zebrafish lines in the gonads in the F13 generation, eight generations after size-selection stopped. Also, global DNA methylation patterns were similar across selection lines and sexes. These findings suggest that five generations of size-selective harvesting, followed by eight generations of maintenance reproduction without further selection, did not induce lasting epigenetic or molecular changes related to the target molecular markers of sexual development in the gonads of zebrafish. The no significant molecular responses to size-selective harvesting observed here, based on specific reproductive and epigenetic markers, differ from previous studies targeting other tissues such as brain and liver, highlighting that not all genes or processes necessarily respond to size-selection and underscoring the importance of marker-specific comparisons.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145029961","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}

{"title":"Wayward youth: how maturity, reproduction and seaweed drive snapper (Lutjanus spp.) habitat shifts.","authors":"Laughlin Siceloff, Matthew S Kendall, Clayton Pollock, Mark E Monaco","doi":"10.1111/jfb.70212","DOIUrl":"https://doi.org/10.1111/jfb.70212","url":null,"abstract":"<p><p>Despite snappers' (family Lutjanidae) commercial and ecological significance, knowledge gaps remain regarding life history, ontogeny and ecology across their range in the Caribbean and south Atlantic. There is also a need to explore the efficacy of marine protected areas (MPAs) as a tool for enhancing nursery and spawning habitat conservation for multiple snapper species. Additionally, even as hurricanes and sargassum inundation have become rising issues for coastal communities, there is a scarcity of data on how commercially important species respond to these environmental disturbances. To address these data gaps, we investigated the spatial and temporal movements of 32 snappers of multiple species in mangrove estuary, reef and shelf edge habitats in St Croix, US Virgin Islands for up to a year using surgically implanted acoustic transmitters and hydrophone arrays. We documented ontogenetic habitat shifts as individuals moved incrementally from juvenile mangrove habitat to adult reef habitat, and several were tracked migrating >30 km to a potential spawning site. Results demonstrated the connectivity of a series of MPAs and their management potential across lutjanid life stages. Size and growth estimates during these movements highlighted the regional variability in lutjanid ontogeny and the need for population-specific life-history studies. Snapper displayed no change in behaviour during a direct hurricane impact, but a significant number of fish made temporary or permanent habitat shifts coinciding with a severe sargassum event inside a bay, providing one of the first descriptions of fishes' behavioural responses to coastal sargassum inundation.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145023479","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}

{"title":"Species-specific behaviour and environmental drivers of trap interactions in wild ornamental fishes.","authors":"Mar Pineda, Daiani Kochhann, Jose Lindoso Garrido Melo, Jan Lindström, Kathryn R Elmer, Adalberto Luis Val, Shaun S Killen","doi":"10.1111/jfb.70217","DOIUrl":"https://doi.org/10.1111/jfb.70217","url":null,"abstract":"<p><p>The harvest of animals from the wild is a pervasive selective force, especially in fisheries, where harvesting often targets individuals with specific traits. While most research has focused on large-scale commercial or recreational fisheries, little attention has been paid to artisanal fisheries, particularly those targeting ornamental species. Furthermore, environmental factors such as temperature and oxygen levels influence the behaviour of fishes, such as boldness and sociability, but their role in the harvesting process remains poorly understood. Here, we used underwater video to examine how two ornamental Amazonian fishes, Hemigrammus sp. and Copella nattereri, interact with artisanal trap gear. We quantified the number of passes, inspections, entries and exits using latency to inspect and enter traps as proxies for boldness, and coefficients of dispersion (CDs) to assess sociability and group coordination. We found that the majority of fish that inspected traps did not enter them, and a given trap typically caught one species over the other. Overall, Copella were captured more frequently, but within individual trials there was no statistical difference in catch numbers between species. While both species inspected traps, Hemigrammus exhibited significantly more passes and a higher rate of inspection. Latency to inspect and enter traps did not differ between species but decreased with increasing temperature for both. Hemigrammus also displayed greater group coordination, with higher CD values across behaviours. Notably, temperature had opposing effects on coordination: for Hemigrammus, CD of inspections increased with temperature and CD of exits decreased, whereas for Copella, inspection CD decreased and exit CD increased. These findings reveal that different species interact with fishing gear in behaviourally distinct ways, influenced by environmental conditions. This highlights the potential for selective pressures to vary not only by species, but also with ecological context. Understanding such dynamics is critical for predicting how artisanal fisheries may shape behavioural traits in wild populations.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145015525","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}

{"title":"Chinook salmon Oncorhynchus tshawytscha (Walbaum, 1792) life history influences how diagnostic cranial structures relate to fish length.","authors":"Jeremy D Romer, Kevin A Stertz, Keiara Pham, Christina A Murphy","doi":"10.1111/jfb.70194","DOIUrl":"https://doi.org/10.1111/jfb.70194","url":null,"abstract":"<p><p>Diagnostic bones can aid in identification and size determination of fishes from ingested prey, archaeological remains or damaged specimens. We extracted diagnostic structures, including cleithra, dentaries, opercles and otoliths, from juvenile spring Chinook salmon (Oncorhynchus tshawytscha) from three distinct groups: hatchery, naturally produced and surrogate, representing shared genetics. Although our observations highlight that growth and life history are important considerations in structuring allometry, we note that a wide variety of diagnostic bones and measurement axes may be suitable for determining body lengths where remains may be damaged or incomplete.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145015515","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}

{"title":"Transcriptomic analysis of immune and metabolic responses in largemouth bass (Micropterus salmoides) challenged with Citrobacter freundii.","authors":"Xiao He, Zheling Zhang, Yanbing Zhang, Wei Sun, Chi Zhang, Xiaodan Liu","doi":"10.1111/jfb.70193","DOIUrl":"https://doi.org/10.1111/jfb.70193","url":null,"abstract":"<p><p>Citrobacter freundii, a common zoonotic pathogen affecting humans, livestock and fish, is recognized for its substantial impact on largemouth bass (Micropterus salmoides) mortality. However, the mechanisms of C. freundii infection in largemouth bass remain poorly understood. Based on the results of extracellular enzyme activity detection, it was speculated that the production of extracellular enzymes may be related to bacterial pathogenicity. To elucidate the immune response mechanism, transcriptomic analysis was conducted on spleen tissues from largemouth bass infected with C. freundii. Following quality filtering, the control group generated 44.04 million clean reads, while the infected group produced 44.32 million clean reads. A total of 385 differentially expressed genes (DEGs) were identified, comprising 224 up-regulated and 161 down-regulated unigenes. Classification using the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes databases further elucidated the biological functions and signalling pathways of the DEGs. Significantly impacted pathways included 'Galactose metabolism', ' Pyrimidine metabolism', ' Alanine, aspartate and glutamate metabolism', 'Ubiquitin-mediated proteolysis', 'Endocytosis', 'Phagosome' and 'SNARE interactions in vesicular transport', underscoring their roles in metabolic and immune-related signalling. Eight DEGs were chosen and validated for their expression levels via real-time quantitative PCR. This study offered molecular insights into the host defence mechanisms against C. freundii infection, contributing to the formulation of disease prevention and control strategies for largemouth bass aquaculture.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145015566","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}

{"title":"Arctic lake trout (Salvelinus namaycush) show evidence of seasonal acclimation of cardiac adrenergic sensitivity but not heat tolerance.","authors":"Emily P Williams, Les N Harris, Jean-Sébastien Moore, Ella K Middleton, Shira A Berkelhammer, Ben Speers-Roesch, Matthew J H Gilbert","doi":"10.1111/jfb.70206","DOIUrl":"https://doi.org/10.1111/jfb.70206","url":null,"abstract":"<p><p>Many Arctic fishes experience prolonged periods of extreme cold and large thermal variation over both rapid and seasonal time scales which challenge critical physiological functions. In the central Canadian Arctic, we caught wild adult lake trout (Salvelinus namaycush) acclimatized to winter and summer temperatures to determine the extent to which they seasonally adjust cardiac thermal performance and adrenergic control. We assessed the intrinsic and maximum heart rate (f_Hint and f_Hmax) of anaesthetised fish through cholinergic blockade and either adrenergic blockade (f_Hint) or stimulation (f_Hmax) during acute warming. Contrary to expectations, S. namaycush showed largely consistent heart rate responses to acute warming between seasons and adrenergic treatments. The f_Hmax increased with acute warming and reached a peak (peak f_H) of 83 and 93 beats min^-1 at temperatures (T_peak) of 19.6 and 20°C and arrhythmia occurred at temperatures (T_arr) of 22.7 and 22.3°C in winter and summer, respectively. However, in the winter, adrenergic stimulation was important to achieve peak f_H at high temperatures; adrenergic blockade in winter did not affect T_peak (18.3°C) or T_arr (21°C) but lowered peak f_H to only 68 beats min^-1 (p < 0.05). Despite limited seasonal differences in f_H, when compared at common, cool to moderate temperatures, winter acclimated fish did exhibit slower atrioventricular conduction (longer PR interval), slower ventricular depolarization (longer QRS duration) and a shorter overall systolic duration (lower QT interval). Overall, S. namaycush exhibited no seasonal plasticity in cardiac thermal tolerance and modest seasonal changes in adrenergic control at high temperatures and in cardiac electrical activity. This limited thermal plasticity may constrain their ability to cope with seasonally distinct thermal challenges including extreme heat events and increase their reliance on other coping or avoidance mechanisms when thermal refugia are available (e.g. behavioural thermoregulation). An increased need for avoidance behaviour could limit the accessibility of key habit for foraging and spawning which occurs in late summer in this region (Dubos et al., 2024).</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145006251","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}

{"title":"Comment on \"Multiple tools to investigate the origin of the exotic species Chinook salmon Oncorhynchus tshawytscha (Walbaum, 1792) (Salmonidae) in the world's largest chocked coastal lagoon (Gonçalves et al., 2025)\".","authors":"Guillermo Figueroa-Muñoz, Christina A Murphy, Ivan Arismendi, Martín Laporta, Graciela Fabiano, Tomás Chalde, Javier E Ciancio, Cecilia Y Di Prinzio, J Andres Olivos, Daniel Gomez-Uchida","doi":"10.1111/jfb.70222","DOIUrl":"https://doi.org/10.1111/jfb.70222","url":null,"abstract":"","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000711","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}

{"title":"Associations between fishes (Actinopterygii: Teleostei) and anthozoans (Anthozoa: Hexacorallia) in epipelagic waters based on in situ records.","authors":"Gabriel V F Afonso, G David Johnson, R Collins, Murilo N L Pastana","doi":"10.1111/jfb.70214","DOIUrl":"https://doi.org/10.1111/jfb.70214","url":null,"abstract":"<p><p>We formally describe the association of fishes and anthozoans in epipelagic waters, extending this relationship to beyond the benthos. In situ observations and photographs of Aluterus schoepfii, Ariomma regulus, Caranx cf. latus and Brama spp. swimming alongside or holding larval tube anemones (Cerianthidae and Arachnactidae) and larval zoanthids (Sphenopidae) were made during blackwater SCUBA dives off Palm Beach, Florida, USA, and off Punaauia, Tahiti, French Polynesia. We report and illustrate the behaviour of these interactions, and suggest an advantage for the anthozoans.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000691","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}

{"title":"Preliminary insights into fish movements beyond the massive Iron Gate dams on the Danube River using acoustic telemetry.","authors":"Marija Smederevac-Lalić, Marian Paraschiv, Gorčin Cvijanović, Torgeir B Havn, Stefan Hont, Mirjana Lenhardt, Marian Iani, Robert J Lennox, Dušan Nikolić, Finn Økland, Rachel A Paterson, Eva B Thorstad","doi":"10.1111/jfb.70204","DOIUrl":"https://doi.org/10.1111/jfb.70204","url":null,"abstract":"<p><p>Upstream fish movement in the Danube River at the Iron Gate is blocked by the massive hydropower dams and ship locks, as shown by tracking six fish species (vimba bream Vimba vimba, common nase Chondrostoma nasus, barbel Barbus barbus, asp Leuciscus aspius, Pontic shad Alosa immaculata and common carp Cyprinus carpio). In the absence of effective fish passage systems, the current level of river connectivity is insufficient to support upstream movement and migration for this diverse, multispecies fish community. The tagged cyprinids displayed evidence of migratory behaviour. Individuals of vimba bream, barbel, asp and common nase that were transported across the lowermost dam and released into the lower reservoir section showed rapid upstream movement, suggesting that the reservoir itself did not present significant obstacles to migration. Some covered the entire 76-km long reservoir within a few days to 2 weeks but were ultimately blocked by the next dam. Cyprinids released below the dams were recorded at varying depths and on both sides of the river. Asp, barbel, common nase and vimba bream moved both upstream and downstream relatively close to the surface below the Iron Gate II dam, averaging 2-3 m below the surface, but also diving down to about 10-20 m. Future studies combining three-dimensional telemetry methods and detailed information on hydrology below the dams could provide further information on the behaviours of the different fish species, which is needed to design efficient fish passage solutions.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144992761","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}

{"title":"Biofluorescence as a tool to resolve crypsis in two bonefish species, Albula goreensis and Albula vulpes, with comments on other external morphology.","authors":"Mason A Thurman, Steven M Lombardo, Ellis R Loew, Paul S Wills, Christopher Robinson, Aaron J Adams","doi":"10.1111/jfb.70209","DOIUrl":"10.1111/jfb.70209","url":null,"abstract":"<p><p>Bonefish Albula spp. in the Western Atlantic have historically been morphometrically and phenotypically indiscernible. We used biofluorescence in two sympatric, cryptic bonefish species, Albula goreensis and Albula vulpes, to develop a rapid and inexpensive in situ survey for species identification that can be used by managers and recreational anglers. Under ultraviolet (379-387 nm) and royal blue (440-457 nm) lights, the two species expressed differing biofluorescence on the iris, axil of the pectoral fins, the vent and the axil of the pelvic fins. Green biofluorescent patterns were most easily discernible under royal blue light while viewing through a Tiffen Yellow #12 longpass filter, although the use of an ultraviolet light with no visual filter was the most cost-effective. We recommend the adoption of biofluorescent field surveys for bonefish using ultraviolet light on the axil of the pectoral fins and the vent for managers and anglers to differentiate A. goreensis and A. vulpes in real time. The application of this survey will allow for both fisheries' independent and dependent data to be appropriately attributed at the species level, allowing for more effective management of the economically important western Atlantic bonefish fishery.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144955920","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}