Journal of fish biology最新文献

{"title":"River-sea thermal differential experienced by salmon post-smolts is not a proximal driver of marine survival.","authors":"Emma Tyldesley, Neil Banas, Richard Kennedy, Graeme Diack, Colin Bull","doi":"10.1111/jfb.70134","DOIUrl":"https://doi.org/10.1111/jfb.70134","url":null,"abstract":"<p><p>Wild Atlantic salmon (Salmo salar) populations from many North Atlantic rivers have declined over recent decades. As these declines are thought to be driven largely by changes in the marine phase of the life cycle, there is a drive towards investigating causes and developing indicators for marine survival. Warming of rivers and seas is altering the smolt thermal environments and migration phenology. This may be causing increasing mismatch between in-river cues used by salmon to optimise the timing of their downstream migration and the suitability of thermal and trophic conditions encountered on sea entry. In this study, recently mobilised data on smolt migration timing, adult marine return rates and freshwater and marine temperatures are used to assess the potential of river-sea thermal differential as a driver of marine survival for a set of southern European Atlantic salmon populations. Shifts in smolt migration phenology appear to have buffered these populations against increasing freshwater temperatures, but post-smolts are migrating into a warming coastal environment. There was no evidence for significant trends in river-sea entry thermal differential, and a significant correlation with marine return rates was found for only one of the seven study populations. For these populations, this suggests that thermal differential at smolting is not a consistent driver or predictor of marine return rates and would not form the basis of a generally applicable indicator of marine survival.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144591395","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":"Trophic ecology of four shark species in the Gulf of Salamanca, Colombian Caribbean, using multi-tissue stable isotopes analysis.","authors":"Lina V Garzón-Peña, Angélica Barrera-García, Antonio Delgado-Huertas, Carlos Polo-Silva","doi":"10.1111/jfb.70126","DOIUrl":"https://doi.org/10.1111/jfb.70126","url":null,"abstract":"<p><p>Habitat use, feeding habits and trophic level were estimated for four shark species, Caribbean sharpnose shark Rhizoprionodon porosus, bull shark Carcharhinus leucas, juveniles of silky shark Carcharhinus falciformis and scalloped hammerhead shark Sphyrna lewini, based on stable isotope analysis (SIA) of δ¹⁵N and δ¹³C in three tissues (muscle, liver and blood) with different turnover rates. The δ¹⁵N values of R. porosus and C. leucas did not differ by sex/maturity stage or time scale. At the same time, juveniles of C. falciformis and S. lewini showed the loss of maternal isotopic signal that decreased based on the tissue scale time. The δ¹³C values indicated a shared habitat for three species: R. porosus, C. falciformis and S. lewini, the latter two with possible regional movements between coastal waters and open waters in their juvenile stage, whereas C. leucas prefers coastal waters because of a higher isotopic enrichment. The mixing model suggests that R. porosus and C. falciformis shared the most abundant prey in the ecosystem (small pelagic fish). Reef fish had a higher percentage contribution for C. leucas, whereas diet contribution of S. lewini was not clearly distinguished. All four species have trophic levels between 3.5 and 4.5, fulfilling meso- and top-predator roles, with generalist, opportunist or specialist behaviours based on isotopic niche breadth and variance comparisons.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144560295","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":"Two new species of stone loaches of the genus Barbatula (Cypriniformes: Nemacheilidae) from Europe with a neotype designation of B. barbatula (Teleostei: Nemacheilidae).","authors":"Bárbara B Calegari, Jörg Freyhof, Conor Waldock, Bernhard Wegscheider, Dario Josi, Lukas Rüber, Ole Seehausen","doi":"10.1111/jfb.70108","DOIUrl":"https://doi.org/10.1111/jfb.70108","url":null,"abstract":"<p><p>Ten species of Barbatula are recognised in Europe, west of the Urals: B. barbatula, B. caucasica, B. hispanica, B. leoparda, B. pironae, B. quignardi, B. sturanyi, B. taurica, B. vardarensis and B. zetensis, with B. caucasica and B. taurica formerly considered subspecies of B. barbatula. A comprehensive dataset of the DNA barcoding gene coI recovered four major clades within Europe: three in Eastern Europe including B. caucasica, B. pironae, B. sturanyi, B. taurica, B. vardarensis and B. zetensis, and one in Western Europe including B. barbatula, B. hispanica and B. leoparda. The results further indicated several genetic lineages, representing potentially new species. Recent surveys in Switzerland revealed two new species of Barbatula, within the Western clade, which are herein described. Barbatula fluvicola, a new species, inhabits streams and rivers in the upper and middle Rhine drainage in Switzerland and Germany, as well as the upper Danube drainage in Germany and Austria. Barbatula ommata, a new species, is mostly confined to lakes of the Aare-Rhine system. The two new species overlap geographically in Switzerland, where they occupy different habitats. Morphological differences, species delimitation analyses, phylogenetic reconstruction and genetic distances based on the coI gene corroborates the recognition of the two new species. To stabilise the nomenclatural status and the consequent use of the nomen B. barbatula, we are herein designating an unambiguously identifiable neotype from the Lez River population, previously recognised as B. quignardi, to clarify the identity of the nominal species Cobitis barbatula Linnaeus, 1758.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144553713","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":"L-TRP supplementation alters the aggressive behaviour of yellowtail lambari (Astyanax altiparanae).","authors":"Fábio Lopes Gonçalez, Camila de Fátima Pereira de Faria, Elisabeth Criscuolo Urbinati","doi":"10.1111/jfb.70129","DOIUrl":"https://doi.org/10.1111/jfb.70129","url":null,"abstract":"<p><p>The yellowtail lambari (Astyanax altiparanae) is a fish species with considerable commercial potential that commonly exhibits aggressive behaviour toward conspecifics. Although body size is a key factor in the establishment of a social hierarchy in other species, its influence on aggression in lambari remains unclear. Moreover, dietary supplementation with L-tryptophan (L-TRP) has shown potential in modulating aggression in fish, warranting investigation in aquaculture contexts. This study aimed to generate an ethogram of aggressive behaviours in yellowtail lambari and assess the effects of body size and L-TRP supplementation on aggression. In the first experiment, direct confrontations between larger and smaller fish revealed that larger individuals exhibited higher frequencies of aggressive behaviour. In the second experiment, fish were fed either a control diet or diets supplemented with L-TRP (0.69 or 1.38 g/100 g) for 10 days, after which they were subjected to direct confrontation with an intruder. L-TRP supplementation resulted in a reduction in the frequency of some aggressive behaviours. These findings enhance our understanding of aggression in yellowtail lambari and provide insights into improving management and welfare in aquaculture.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144528167","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":"Diversity and biological characterization of anguillid eels in Pangani and Rufiji river systems, Tanzania: Implications for conservation.","authors":"Kaijage Laurian, Lydia Gaspare, Klaus Wysujack, Catherine Mwakosya, Reinhold Hanel","doi":"10.1111/jfb.70123","DOIUrl":"https://doi.org/10.1111/jfb.70123","url":null,"abstract":"<p><p>Tropical rivers in the western Indian Ocean are under significant human activity pressure, impacting the aquatic fauna, including freshwater eels. However, conservation efforts are hindered by a lack of comprehensive knowledge of these species. This study used a combination of morphological characters and molecular markers (mitochondrial cytochrome oxidase subunit I) to identify anguillid eel species unambiguously. The study revealed the presence of Anguilla bengalensis, Anguilla bicolor and Anguilla marmorata, with the last being a new report for the Pangani River. The study also established length-weight relationships for A. bicolor and A. bengalensis and observed significant differences in gonadal development and physiological indices among maturity levels. No study was performed for A. marmorata due to an insufficient sample size (n = 2). The eye index and pectoral index provided measures of maturity, indicating significant morphological changes during maturation. Understanding the biology and ecology of anguillid eels is crucial for developing effective conservation and management strategies. Due to the vulnerability of these migratory species to various human pressures, concerted efforts are needed to protect their populations and the integrity of freshwater ecosystems in the region. This study provides valuable insights into the diversity and biological characteristics of anguillid eels in East Africa, filling crucial knowledge gaps and providing a foundation for informed conservation actions. The findings of this study have broader implications for regional freshwater conservation, particularly in regions facing similar environmental challenges. They can serve as a reference point for international efforts to protect freshwater biodiversity, in general, and catadromous anguillid species, in particular.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144540463","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":"Insights into mucosal and systemic immune responses of African catfish, Clarias gariepinus, to chilodonellosis: A natural infection study.","authors":"Walaa F A Emeish, Salwa Mansour, Marwa M Fawaz, Ali H Alghamdi, Abdullah A A Alghamdi, Zeinab Al-Amgad, Haitham H Mohammed, Catrin S Rutland, Ahmad A Elkamel, Karima A Bakry","doi":"10.1111/jfb.70131","DOIUrl":"https://doi.org/10.1111/jfb.70131","url":null,"abstract":"<p><p>A natural parasitic infection with the external ciliate protozoan, Chilodonella hexasticha, was recorded 3 days post-transportation (PT) in the gills and skin of African catfish (Clarias gariepinus). Infected fish displayed behavioural changes and typical signs of infection. Mortalities started on day 7 PT and stopped on day 13 PT, where cumulative mortality reached 62.2%. The expression of immune-relevant genes, interleukin-1β (IL-1β), major histocompatibility complex class II (MHC-II) and interleukin-10 (IL-10) in the gills, head kidneys and spleen of the Chilodonella-infected and control uninfected fish were investigated using quantitative real-time polymerase chain reaction (PCR) on days 7-, 14- and 28 PT. Expression levels of IL-1β in the gills showed a significant upregulation on day 7 PT but were not significantly different from those of the control fish in the head kidneys and spleen at all time points investigated. Expression levels of MHC-II were significantly elevated in the gills (days 7- and 14 PT), head kidneys (days 7-, 14- and 28 PT) and spleen (days 7- and 14 PT), whereas IL-10 showed a significant upregulation only in the gills on day 14 PT, with no significant changes in all other tissues examined. Additionally, histological studies were conducted to investigate the alterations in the head kidney and spleen tissue structures associated with the immune response to infection and the changes in the expression profiles of the immune-related genes in these organs. Depletion of the renal and splenic tissues, simultaneously with prominent melanomacrophage infiltration, was observed. Also, the histopathologic changes caused by C. hexasticha in the gills of infected fish involved aggravated tissue damage characterized by hyperplasia, and necrosis of the gill lamellae was recorded.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144528166","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":"Tough mothers and tender fathers: New assays reveal the behavioural complexity of the common clownfish","authors":"William Bernard Perry","doi":"10.1111/jfb.70133","DOIUrl":"10.1111/jfb.70133","url":null,"abstract":"&lt;p&gt;In the last two decades, anemonefish, especially the Ocellaris or common clownfish (&lt;i&gt;Amphiprion ocellaris&lt;/i&gt;), have captured the public's imagination. Boosted by the 2003 Disney Pixar film, &lt;i&gt;Finding Nemo&lt;/i&gt;, they have become the most popular marine fish on the UK market (Pinnegar &amp; Murray, &lt;span&gt;2019&lt;/span&gt;). As a proud owner of a marine aquarium and two common clownfish myself [with an electricity bill to prove it… (Perry, &lt;span&gt;2023&lt;/span&gt;)], their popularity is easy to understand. For example, their vibrant colours and patterns, sex changing abilities, hardy nature and affinity for captive rearing make them a fascinating fish to keep. Perhaps most fascinating, however, are their big personalities, such as unwavering defence of their host anemone from other tank-mates.&lt;/p&gt;&lt;p&gt;Although most clownfish owners, including myself, sit and gawp at their fish for hours, with little understanding of the behavioural firework display playing out in front of them, the same cannot be said for Graham et al. (&lt;span&gt;2025&lt;/span&gt;). In this issue, they measure 35 behaviours across 7 behavioural assays: (1) parental care, (2) small intruder aggression (hermit crab), (3) large intruder aggression [threespot dascyllus (&lt;i&gt;Dascyllus trimaculatus&lt;/i&gt;)], (4) male-oriented aggression, (5) female-oriented aggression, (6) immediate reaction to a threat and, finally, (7) nest maintenance.&lt;/p&gt;&lt;p&gt;Using this broad array of assays, Graham et al. (&lt;span&gt;2025&lt;/span&gt;) found that 33 of the behaviours were repeatable, with sex differences in (1) parental care, (3) large intruder aggression and (5) female-oriented aggression. Although both sexes display egg-caring behaviours [which cannot be said for all damselfish, with females in some species devouring the eggs at the first chance (Sakai et al., &lt;span&gt;2023&lt;/span&gt;)], males displayed more egg-caring behaviours. Females, on the contrary, displayed more aggressive defensive behaviours.&lt;/p&gt;&lt;p&gt;It was also observed that territorial aggression increased when there were no eggs in the nest, as both the male and female had more time to devote to defence. Indeed, when surrogate eggs were placed in the nest, aggression went up, which may suggest that the fish could tell when eggs were not their own. Finally, males also showed three behavioural syndromes, building on previous work (Wong et al., &lt;span&gt;2013&lt;/span&gt;), where each syndrome had a suite of correlated behaviours. Unexpectedly, females showed no behavioural syndromes. Graham et al. (&lt;span&gt;2025&lt;/span&gt;) suggest that because of the unique sequential hermaphroditism and social hierarchy, which lock these fish into a final, irreversible sexual and social role, they may have reduced behavioural plasticity.&lt;/p&gt;&lt;p&gt;This study provides a new and unprecedented glimpse into the lives of a legendary species, star of both stage and screen, whose behavioural charisma has made them a staple in home aquariums across the globe. Perhaps most importantly, however, is the behavioural toolkit gen","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":"106 6","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jfb.70133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144528168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Commercial fishing influences the life histories of fish in the world's largest desert lake.","authors":"Madison F Muehl, Jill A Olin, James L Keyombe, Josephine Y Aller, Robert C Aller, Kamazima M M Lwiza, Michael G Frisk","doi":"10.1111/jfb.70103","DOIUrl":"https://doi.org/10.1111/jfb.70103","url":null,"abstract":"<p><p>Lake Turkana, the world's largest permanent desert lake, is an important source of fish for both local consumption and international trade. The growth of Lake Turkana's commercial fishery has increased the risk of overexploiting the lake's fish stocks. Selection pressure from overexploitation of fish stocks often drives shifts in fish life-history traits, including mean length (L_mean), maximum length (L_max) and size at maturity (L_mat). To assess the life-history indicators of overexploitation in Lake Turkana, we compared the life-history traits of six of Lake Turkana's major commercial fish species from three time periods (1930-1953, 1972-1975, 2010-2022) that represent distinct levels of fishing pressure. These focal species were the African butter catfish Schilbe uranoscopus Rüppell 1832, the elongate tigerfish Hydrocynus forskahlii (Cuvier 1819), Nile perch Lates niloticus (L. 1758), Nile tilapia Oreochromis niloticus (L. 1758), silversides Alestes baremose (Joannis 1835) and wahrindi Synodontis schall (Bloch and Schneider 1801). Heavily exploited species exhibited notable decreases in L_mat as fishing pressure increased, and include A. baremose (29.7% decrease), H. forskahlii (16.4% decrease), L. niloticus (56.1% decrease) and O. niloticus (45.3% decrease). In contrast, lightly exploited species, including S. uranoscopus and S. schall, did not exhibit large declines in life-history traits. Additionally, we used current catch length frequency data for L. niloticus to infer that L. niloticus are currently experiencing overfishing and exhibit signs of the depletion of large 'mega-spawners'. These results suggest that heavy commercial fishing likely drives the observed life-history responses. We suggest that the management of sustainable fisheries in Lake Turkana should focus on gear size restrictions as well as on reducing fishing effort on commercial-sized fish to decrease the probability of overfishing and potential declines of stocks.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497201","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":"Non-invasive ultrasound measurements for determination of hepato-somatic index in Greenland halibut (Reinhardtius hippoglossoides).","authors":"Jacob W Schilling, Nigel E Hussey, Kevin J Hedges, Amanda N Barkley","doi":"10.1111/jfb.70089","DOIUrl":"https://doi.org/10.1111/jfb.70089","url":null,"abstract":"<p><p>Hepato-somatic index (HSI) is widely used to indicate fish body condition and level of energy reserves related to feeding/physiology and reproduction. HSI is traditionally obtained by dissection and measurement of liver mass versus body mass, but ultrasound technology may provide a minor invasive method to obtain liver dimensions to estimate the HSI of live fish. Images of Greenland halibut (Reinhardtius hippoglossoides) livers (n = 37) were obtained using ultrasonography, then subsequently dissected, weighed and measured using conventional methods. Four liver measurements (width n = 1 and depth n = 3) were obtained from ultrasound images and compared with corresponding physical width/depth measurements. The relationship between the derived ultrasound width/depth metrics and liver mass was then used to estimate total liver mass (LM_U) and LM_U values divided by the total body weight of each fish to derive the HSI values (HSI_U). The LM_U and HSI_U values were not significantly different from the original liver mass and associated HSI values. Ultrasound liver depth was the most accurate metric for estimating HSI_U values, but a degree of variability was observed. Derived HSI_U values varied between maturity stages matching predictions but did not vary by sex or capture location. This non-invasive method can be conducted quickly with minimal stress to fish, with applications to studies measuring HSI in commercially important to endangered species. The framework presented for measuring and estimating ultrasound-derived HSI in live fish provides a baseline that can be improved with further validation work.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144505884","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":"Cellular responses to thermal stress and moderate oxygen limitation in juvenile lake trout.","authors":"Alyssa M Weinrauch, Analisa Lazaro-Côté, Travis C Durhack, Eva C Enders, Ken M Jeffries","doi":"10.1111/jfb.70111","DOIUrl":"https://doi.org/10.1111/jfb.70111","url":null,"abstract":"<p><p>Lake trout (Salvelinus namaycush) is an important food fish in northern communities, inhabiting cool, well-oxygenated water, but climate change is reducing available habitat, with extended summer stratification of lakes creating an upper thermal barrier (~15°C) and lower dissolved oxygen (DO) boundary (4-7 mg L^-1). Together, these environmental factors can influence tolerance thresholds and climate change may lead to abiotic factors exceeding these physiological thresholds in lake trout habitats. Thresholds can shift with environmental acclimation in lake trout populations, but the functional basis of this shift has yet to be examined. The abundance of transcripts offers insight into underlying cellular responses to environmental stressors that can provide an early warning of adverse physiological outcomes. Here, we used a stress-response transcriptional profiling chip to investigate a suite of genes involved in thermal and general stress in lake trout acclimated to a range of temperatures (6-18°C) and two DO conditions (~10 or ~6 mg L^-1), as well as following acute thermal stress (i.e. CT_max). Transcriptional profiles were assessed in the gill, liver and epidermal mucus. Generally, fish acclimated to the greatest combined stressor (i.e. 18°C and 6 mg L^-1 DO) had the largest transcriptional response, suggestive of a transition from a routine stress response to an extreme survival response. A noted temperature dependence occurred in liver tissue, which was not evident in gill or mucus tissues. Further, transcriptional responses in the gill and mucus were highly correlated (r = 0.74-0.87), highlighting the potential use of these tissues for non-lethal sampling methods to enhance management and conservation strategies for lake trout.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497200","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}