Journal of fish biology最新文献

{"title":"Seasonal water level fluctuations cause opposite changes in fish trophic dynamics in Amazonian black-water and white-water lakes.","authors":"H Agasild, F Cremona, A Tuvikene, A L Val, K Panksep, P Zingel","doi":"10.1111/jfb.70002","DOIUrl":"https://doi.org/10.1111/jfb.70002","url":null,"abstract":"<p><p>Amazonian floodplain lakes, distinguished by their water types, are crucial ecosystems for fish biodiversity. In these ecosystems, the annual hydrological cycle, known as the \"flood pulse,\" is the primary driving force for fish productivity, providing habitat and feeding opportunities. However, how seasonal water level changes affect fish assemblages and feeding guild responses in floodplains with varying watershed characteristics is still poorly understood. We conducted a comparative stable isotope study in both a white-water and a black-water floodplain lake to investigate fish trophic dynamics during periods of rising and low water levels. Analyses of a broad taxonomic range of fish (seven orders and 27 families, with 73 and 82 taxa in the studied lakes, respectively) revealed that the fish assemblages in the studied white-water and black-water lakes exhibited different trophic dynamics in response to changes induced by the hydrological cycle. In contrast to the white-water lake, a strong, trophic guild-related effect shaped the δ¹³C and δ¹⁵N dynamics in the black-water lake. As a result, the fish assemblage in the black-water lake experienced significant trophic shifts with generally opposite dynamics over the water levels compared to the white-water lake. In the black-water lake, water level changes caused alterations in trophic niche width in almost all analyzed guilds (carnivorous, detritivorous, herbivorous, invertivorous, omnivorous, planktivorous), while this was less consistent in the white-water lake. Our results suggest that the fish assemblage in the nutrient-poor black-water lake is more dependent on the annual flood pulse and associated resources than in the white-water lake. These findings may further imply a relatively higher vulnerability of the black-water lake to alterations in the regular flood pulse compared to the white-water lake, indicating greater stability in feeding conditions and fish trophic dynamics in the latter.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143399177","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":"Pelagic distribution and night foraging of early juvenile European catfish (Silurus glanis L.).","authors":"Zuzana Sajdlová, Tomáš Jůza, Petr Blabolil, Vladislav Draštík, Martin Čech","doi":"10.1111/jfb.16072","DOIUrl":"https://doi.org/10.1111/jfb.16072","url":null,"abstract":"<p><p>This study provides evidence of pelagic occurrence and night feeding in early juvenile European catfish that contributed 0.2% to the early juvenile pelagic community at night in Klíčava, 0.3% in Římov, and 3.3% in Žlutice Reservoirs in the Czech Republic. The catfish occurred mostly at a depth of 2-4 m. Their abundance was 5.5 inds.1000 m^-3 in Klíčava Reservoir (2018), 0.3 inds.1000 m^-3 in Římov Reservoir (2018), and 88.8 inds.1000 m^-3 in Žlutice Reservoir (2019). Catfish fed on phantom midges (Chaoborus sp.).</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143399174","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":"Is it possible to contribute to the recovery of European grayling (Thymallus thymallus, Salmonidae) populations by stocking cultured brood fish in the pre-spawning period?","authors":"Mladen Avramović, Jan Turek, Tomáš Randák","doi":"10.1111/jfb.16071","DOIUrl":"https://doi.org/10.1111/jfb.16071","url":null,"abstract":"<p><p>European grayling populations have declined significantly in their central range, prompting numerous stocking programs with reared fish that did not bring desirable population prosperity. This study evaluated the effectiveness of stocking long-reared grayling brood fish before their spawning period. It focused on monitoring the presence of juveniles coming from their natural spawn in the stream and on recapture rates and growth parameters of stocked fish to estimate their adaptability in a natural river environment. The results revealed that the recapture rate of the stocked brood fish was notably low, with significant increases only in length growth but a decreases in condition factor, suggesting poor adaptability in the wild. The limited number of young-of-year grayling from natural spawning further indicated low reproductive success. These results highlight the inadequacies of this stocking approach to strengthen the wild grayling population. We suggest alternative strategies, such as using younger stock and implementing protective measures like catch-and-release, which may improve conservation efforts and enhance the success of grayling stocking programs.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143399024","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":"Dietary exposure to 17α-ethinylestradiol negatively affects reproduction and health parameters of zebrafish (Danio rerio).","authors":"Aneta Hollerova, Nikola Peskova, Zuzana Weiserova, Nikola Hodkovicova, Petr Marsalek, Frantisek Tichy, Ales Franc, Zdenka Svobodova, Jana Blahova","doi":"10.1111/jfb.16065","DOIUrl":"https://doi.org/10.1111/jfb.16065","url":null,"abstract":"<p><p>Pollution of the aquatic ecosystem by hormone-active substances is a frequently discussed topic these days. Such substances can pass through the sewage treatment plant system and affect aquatic life. This study tested the effect of 17α-ethinylestradiol (EE2) on individual zebrafish (Danio rerio) at an environmentally relevant concentration in fish food (10 μg/kg) and at a concentration 100 times higher (1000 μg/kg). This experiment revealed significant changes in the expression of reproductive genes, an increase in vitellogenin levels and histopathological lesions in the testes after EE2 exposure. Additionally, lipid peroxidation and changes in antioxidant enzyme activities were observed at both tested concentrations, along with morphological changes and increased mortality at the higher concentration. Even the environmentally relevant concentration of EE2 poses a danger to the aquatic organisms as it changes D. rerio's reproductive and health parameters, indicating toxicity at molecular, cell, tissue, and organism levels.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143399020","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":"A common garden experiment in the wild reveals heritable differences in migration tendencies among brown trout populations.","authors":"Thomas E Reed, Robert Wynne, Jamie Coughlan, Patrick Gargan, Joshka Kaufmann, Karl P Phillips, Adrian Rinaldo, Russell Poole, Philip McGinnity","doi":"10.1111/jfb.16068","DOIUrl":"https://doi.org/10.1111/jfb.16068","url":null,"abstract":"<p><p>We undertook a common garden experiment in the Burrishoole catchment, western Ireland, to test for heritable life-history differences among neighboring brown trout (Salmo trutta L.) populations that exhibit neutral genetic divergence. Experimental crosses were made using either local females (obtained from a below-waterfalls section of the Rough River within the Burrishoole) or females from the Erriff River-a neighboring catchment that currently produces a stronger run of anadromous migrants than the Burrishoole. Each female was mated to three different types of males: Rough Below-Falls, Rough Above-Falls (resident males obtained from above the waterfalls), and Erriff. Offspring from the resulting six crosses were introduced as unfed fry into a stretch of the Rough River bounded upstream by the waterfalls and downstream by a Wolf-type fish trap (Rough River Downstream Trap, RRDT). Genetic parentage analysis (16 microsatellite markers) was then used to assign offspring sampled at various time points and locations back to cross type. No differences in parr survival rates (electrofishing in the Rough River) were found among the crosses, but parr moving downstream (intercepted at the RRDT) were skewed toward the Erriff female × Erriff male cross, with a deficit assigning to the Rough Below-Falls female × Rough Above-Falls male cross. Smolts leaving fresh water (sampled at two sea-entry traps) were assigned disproportionately to crosses involving one or two Erriff parents. Offspring from pure Burrishoole crosses were more likely to become putative spawners than those from crosses involving one or two Erriff parents, pointing toward possible local adaptation. These results are consistent with heritable variation in migratory tendencies-a key aspect of intraspecific biodiversity that warrants protection-and with previous suggestions that the Burrishoole system may have evolved recently toward reduced anadromy following a novel and catastrophic anthropogenic change.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364956","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":"Amino acid δ¹⁵N in eye lens laminae reveals life-time ontogenetic trophic shifts of a highly migratory species.","authors":"Rocío I Ruiz-Cooley, Alfredo Ordiano-Flores","doi":"10.1111/jfb.16061","DOIUrl":"https://doi.org/10.1111/jfb.16061","url":null,"abstract":"<p><p>Investigating the feeding ecology through the ontogenesis of highly migratory species such as the Pacific Bluefin tuna (PBFT; Thunnus orientalis) is difficult due to its extensive home range and cross-oceanic migration. Here, we show the potential of conducting nitrogen stable isotope (δ¹⁵N) analyses in bulk tissue and amino acids (AAs) in consecutive eye lens laminae of PBFT to reconstruct the trophic life history for an individual tuna. The δ¹⁵N_bulk profiles between individuals caught in the wild and pen-raised were compared. For all individuals, δ¹⁵N_bulk values increased with increasing eye lens diameter or fork length, and exhibited low variation among individual profiles despite tuna being captured in different months. Large δ¹⁵N_bulk shifts (6.8‰-8.5‰) were quantified between the first and last deposited laminae for each individual, suggesting major ontogenetic changes in either foraging areas or trophic position. AA δ¹⁵N values indicate that this highly migratory schooling predator switches feeding areas from lower to higher δ¹⁵N baseline values, reflecting feeding on both sides of the north Pacific, and tends to feed on prey of higher trophic position as it grows. Together, stable isotope analysis in bulk tissue and individual AAs in eye lens laminae could be a powerful approach to investigate changes in the foraging habitat and trophic status of highly migratory species.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143122814","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":"Comparing the somatic growth and swimming kinematics of Atlantic cod (Gadus morhua, Linnaeus) and haddock (Melanogrammus aeglefinus, Linnaeus) larvae.","authors":"Reidun Bjelland, Caroline M F Durif, Howard I Browman, Anne Berit Skiftesvik, Alessandro Cresci, Edda Johannesen","doi":"10.1111/jfb.16062","DOIUrl":"https://doi.org/10.1111/jfb.16062","url":null,"abstract":"<p><p>Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) are found on both sides of the North Atlantic and often their spawning overlaps in time and space. Yet, haddock has a much more variable recruitment than cod in areas where they are sympatric, a difference that is consistent across ecosystems. At the larval stages, differences in feeding behavior have consequences for growth and survival, potentially contributing to the differences in recruitment between these species. We tested whether haddock displayed different swimming behavior to cod under abundant food conditions, while also comparing their growth every 7 days until 38 days post hatching (dph). Swimming kinematics were quantified from the three-dimensional trajectories of larvae filmed in an aquarium at 11, 21, and 32 dph. Cod swam faster than haddock starting at 21 dph. Differences in swimming speed between species were consistent with body morphology. Haddock was heavier than cod at a given age and body length. At 11 dph, haddock exhibited longer pauses and wider horizontal and vertical turn angles than cod, indicating a moderately larger visual search field compared to cod. Longer pause duration indicates that haddock are searching for prey for longer periods than cod at 11 dph. The differences in prey search disappeared at 21 and 32 dph. The differences in feeding and swimming behavior reported here could play an important role for survival, with consequences for the recruitment of these species.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143122815","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":"Reproductive timing and spawning dynamics of European barracuda Sphyraena sphyraena in eastern Mediterranean Sea.","authors":"Foivos A Mouchlianitis, Katerina Charitonidou, Maria Tsavdari, George Minos, Kostas Ganias","doi":"10.1111/jfb.16070","DOIUrl":"https://doi.org/10.1111/jfb.16070","url":null,"abstract":"<p><p>This research investigated the reproductive timing and spawning dynamics of the European barracuda Sphyraena sphyraena in the Thermaikos Gulf, northern Aegean Sea, where the species is predominantly harvested using gillnets. The study was conducted over 2 years, from May to October, coinciding with the period when the local gillnet fishery targets surmullet Mullus surmuletus. The timing of reproduction was examined by the gonado-somatic index, the macroscopic assessment of the ovarian stage, and the microscopic examination of the ovarian developmental stage. All three indices demonstrated that spawning-capable females were caught in May and June and that spawning ceases by late July to August. Regarding spawning dynamics, the European barracuda is a multiple spawner; the oocyte size frequency distributions of all spawning-capable and actively spawning females were continuous, and postovulatory follicle cohorts from different daily spawning events co-occurred in the ovaries of many of those females. Relative batch fecundity was rounded off to 197 ± 108 oocytes per gram and relative total fecundity at 1263 ± 513 oocytes per gram. The somatic condition increased in postspawning individuals, suggesting a capital breeding reproductive strategy.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143122816","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":"The costs and healing rates of minor injuries in neonatal reef sharks.","authors":"Shamil F Debaere, Ornella C Weideli, Ryan Daly, Elena M C Milanesi, José E Trujillo, Ian A Bouyoucos, Johann Mourier, Andrew Chin, Serge Planes, Gudrun De Boeck, Jodie L Rummer","doi":"10.1111/jfb.16059","DOIUrl":"https://doi.org/10.1111/jfb.16059","url":null,"abstract":"<p><p>Elasmobranch fishes (i.e., sharks, skates, and rays) exhibit remarkable wound-healing capabilities and consistently maintain a high capacity for tissue regeneration throughout their lives. This high capacity for wound healing may be particularly important for neonatal elasmobranchs that are still developing their immune system. However, little is known about the costs associated with wound healing and the potential influence of environmental variables or life history. In this study, we explore (1) the impact of minor, external injuries on the growth and body condition of neonatal blacktip reef (Carcharhinus melanopterus) and sicklefin lemon (Negaprion acutidens) sharks using a long-term fisheries-independent dataset from Moorea, French Polynesia, (2) the influence of ambient temperature on healing rates in neonatal blacktip reef sharks at two experimental temperatures (25°C and 29°C), and (3) variations in umbilical wound-healing rates between blacktip reef and sicklefin lemon sharks using an additional long-term dataset from St. Joseph Atoll, Seychelles. We found no impact of minor, external injuries on growth and body condition in neonatal blacktip reef and sicklefin lemon sharks, accelerated umbilical wound healing in neonatal blacktip reef sharks exposed to elevated ambient temperatures, and distinct umbilical wound-healing rates between neonatal blacktip reef and sicklefin lemon sharks. Enhancing our understanding of sharks' healing capabilities and the influence of environmental factors on this process is crucial for informing handling practices aimed at improving post-release survival rates of captured sharks under current and future oceanic conditions.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143074807","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":"Dissolved organic carbon from \"white\" waters in Amazon basin (Brazil) and the osmoregulatory responses of tambaqui (Colossoma macropomum) in neutral and acidic environments.","authors":"Helen Sadauskas-Henrique, Luciana R de Souza-Bastos, D Scott Smith, Adalberto L Val, Chris M Wood","doi":"10.1111/jfb.16054","DOIUrl":"https://doi.org/10.1111/jfb.16054","url":null,"abstract":"<p><p>Optical characterization of dissolved organic carbon (DOC) freshly collected from the circumneutral \"white water\" of the Rio Solimoes revealed that it had lower aromaticity, lower molecular weight, and a greater autochthonous content than DOC from the acidic \"black water\" of the Rio Negro. The tambaqui (Colossoma macropomum), a characid member of the Serrasalmidae, is a model neotropical fish that migrates annually between the two rivers. We analysed ionoregulatory responses of the tambaqui over 24 h in ion-poor water at pH 7.0 and pH 4.0 in the absence and presence of 10 mg L^-1 Rio Solimoes DOC (\"SOL DOC\"). Measured parameters included transepithelial potential (TEP) across the gills, net flux rates, and plasma concentrations of Na⁺, Cl^-, ammonia, and urea, and branchial Na⁺, K⁺ -ATPase, H⁺, ATPase, and carbonic anhydrase activities. Results were compared to our earlier study using similar protocols to examine the ionoregulatory effects of 10 mg L^-1 DOC (\"SGC DOC\") collected from black water at São Gabriel da Cachoeira (SGC) in the upper Rio Negro. At pH 7.0, SOL DOC had no effect on the negative TEP across the gills. Exposure to pH 4.0 caused a marked depolarization of the TEP to positive values that was not ameliorated by the presence of SOL DOC. This contrasts with SGC DOC that drove TEP more negative at pH 7.0 and fully protected against the depolarization at pH 4.0. However, SOL DOC promoted positive balance of Na⁺ and Cl^- at pH 7.0 and helped ameliorate the negative balance of these ions seen at pH 4.0. This again contrasts with SGC DOC that exacerbated ion losses at pH 4.0. The protective effects of SOL DOC on ion balance maybe related to increased v-type H⁺ ATPase activity in the gills, and unrelated to TEP. The very different responses to the two DOCs are discussed with respect to their optical properties, the time that they were in storage prior to testing (SOL <1 month, SGC 2 years), and the life history of the tambaqui in the two rivers.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143059301","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}