Journal of fish biology最新文献

{"title":"European seabass, Dicentrarchus labrax, show no significant response to infrared light.","authors":"Alexa Sugpatan Abangan, Victor Simon, Fabien Morandeau, François Martignac, Dorothée Kopp, Robin Faillettaz","doi":"10.1111/jfb.70038","DOIUrl":"https://doi.org/10.1111/jfb.70038","url":null,"abstract":"<p><p>Infrared (IR) light is widely accepted as a non-intrusive lighting for discreet observation but relevant studies are scarce. The response of European seabass Dicentrarchus labrax (Linnaeus 1758) towards IR light was tested during laboratory experiments alternating sequences of IR light and dark conditions. Swimming trajectories were extracted from hydroacoustic videos and behavioural metrics (e.g. speed, bearings) were quantified from the D. labrax movement patterns. D. labrax showed no preference nor deterrence towards IR light, supporting the use of discreet IR light as an alternative to visible light for monitoring unbiased D. labrax behaviour.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143752980","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":"Acclimation conditions and subsequent acute hypoxia challenges do not affect the frequency of erythrocyte nuclear segmentation in triploid brook charr Salvelinus fontinalis (Mitchill 1814).","authors":"John D Clark, Christopher A Baker, Sarah A McGeachy, Rebecca R Jensen, Tillmann J Benfey","doi":"10.1111/jfb.70031","DOIUrl":"https://doi.org/10.1111/jfb.70031","url":null,"abstract":"<p><p>Routine observations of blood smears have repeatedly shown that triploid fish have a greater proportion of erythrocytes with nuclear segmentation (ENS) than diploids; however, there is as yet no understanding of why this is the case and whether it affects erythrocyte function. In an attempt to address this, we examined blood smears from two previous experiments to determine whether ENS frequency is affected by rearing conditions (acclimation temperature or dissolved oxygen level) and subsequent acute aerobic distress in diploid and triploid brook charr Salvelinus fontinalis (Mitchill 1814). As expected, triploids had a higher ENS frequency than corresponding diploids, but with no biologically significant effect of experimental conditions on ENS frequency in triploids. ENS was too rare to examine the effects of these conditions in diploids.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730253","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":"Relationship between body density and feeding habit among flatfishes.","authors":"Sango Nishio, Kazuki Ito, Orio Yamamura","doi":"10.1111/jfb.70036","DOIUrl":"https://doi.org/10.1111/jfb.70036","url":null,"abstract":"<p><p>The body density of 16 species of flatfish was measured. Their density varied, ranging from 1.011 to 1.074 g cm^-3, with benthic feeders tending to have the highest values, followed by mixed feeders and then pelagic feeders. Greenland halibut, Reinhardtius hippoglossoides, had the lowest value (1.022 ± 0.0052 g cm^-3), below the density of seawater (1.026 g cm^-3), indicating that this species can swim away from the sea floor with low-energy costs. In this manner, low body density may contribute to pelagic feeding. Further study of lipid content and other body characteristics of each flatfish is expected to elucidate their evolutionary traits more clearly.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730263","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":"Effects of photoperiod on growth performance, body composition and antioxidant capacity of fat greenling juvenile Hexagrammos otakii.","authors":"Qikang Bo, Yunzhao Lu, Yanguang Yu, Chao Ma, Jufeng Jiang, Chao Cai, Lei Jia, Limin Song, Shuai Wang","doi":"10.1111/jfb.70015","DOIUrl":"https://doi.org/10.1111/jfb.70015","url":null,"abstract":"<p><p>As one of the major environmental factors, photoperiod plays an important role in factory aquaculture systems, and the effects of photoperiod on organism performance appear to be species specific. To determine a suitable light photoperiod that optimizes production efficiency, the effects of three commonly used photoperiods 12L (12 h light):12D (12 h dark), 24L and 24D on body composition and antioxidant capacity of juvenile fat greenling Hexagrammos otakii were assessed. The initial weight of the fish in this feeding test was 11.07 ± 0.16 g, and the trial lasted for 30 days. The effects of these three photoperiods on growth performance were also tested. Juvenile fat greenling reared under 24D shows significant growth performance, with significantly higher feed efficiency and significantly lower feed rate. However, there was no significant difference in growth performance between the other two treatments. On the 10th day of the experiment, the hepatic antioxidant enzyme activities in 24L and 12L:12D treatments were all significantly greater than those in 24D treatment. However, at end of the culture trial, hepatic antioxidative enzyme activity was suppressed, and the highest malondialdehyde concentration was observed at 12L:12D, followed by 24L and then by 24D, implying relatively greater degree of oxidative damage to lipids and proteins in 12L:12D and 24L groups. The photoperiod affected the muscle fatty acid (FA) level, and the level of FA was significantly higher in the 24D group than in the other two groups. The levels of saturated fatty acids (especially C24:0) and monounsaturated fatty acids (especially C18:1n-9) were significantly lower in the 12L:12D and 24L groups. The effect of photoperiods on the total muscle protein content of fat greenling juveniles was limited. Nevertheless, an obvious effect on amino acid composition, especially essential amino acid (EAA) composition, was observed, and the EAAs in the muscle of juveniles were sharply consumed to physiologically adapt to environmental variations in the 12L:12D and 24L treatments. These findings suggest that constant darkness promotes better growth, body composition and antioxidant capacity in fat greenling juveniles and that a changing photoperiod (light-dark conversion) may cause more stress in this reef-dependent species.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730254","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":"Lump by name, but not by nature: 1000km migration of lumpfish (Cyclopterus lumpus)","authors":"William Bernard Perry","doi":"10.1111/jfb.16074","DOIUrl":"https://doi.org/10.1111/jfb.16074","url":null,"abstract":"<p>You can tell a lot about the life history and ecology of a fish by looking at its morphology (Blake, <span>2004</span>). These clues can be more obvious in some species of fish, with some features so exaggerated that they are almost a caricature, characteristic of a certain niche. Be that the extreme asymmetry of flatfish, perfectly adapted to benthic living (Livingston, <span>1987</span>), or the streamline, drag optimized, morphology of sailfish, which affords them the title of the fastest sea animal (Sagong et al., <span>2013</span>). However, while assumptions based on gross morphology can be useful, like any assumption, they can be misleading, with nature seemingly always able to provide an exception to the rule.</p><p>In this issue, Kennedy et al. (<span>2025</span>) challenge our assumptions on one of the North Atlantic's most unusual inhabitants, the lumpfish. While ‘most unusual’ is a hotly contested category, lumpfish have many features which make them excellent contenders. Features such as biofluorescence (Juhasz-Dora et al., <span>2022</span>), a ventral adhesive disk (which is the source of their other common name, ‘lumpsucker’) (Brown, <span>1986</span>), scaleless skin, an ability to change skin colour through their lifecycle (Davenport and Thorsteinsson, <span>1989</span>), parasite eating behaviours (making them a popular sea lice prevention method in Atlantic salmon aquaculture (Ytteborg et al., <span>2025</span>)) and a variety of behavioural personalities (Whittaker et al., <span>2021</span>).</p><p>Perhaps the lumpfish's most unusual feature is its overall morphology, consisting of a rounded, knobbly, body, broad head and small pectoral fins. You would therefore be forgiven for thinking that this species was not capable of making long distance migrations. While this may be the case for larval and juvenile lumpfish (Moring and Moring, <span>1991</span>), by tagging an incredible 2,750 individuals around Iceland and in the Norwegian Sea, Kennedy et al. (<span>2024</span>) demonstrate that these fish are capable of frequent long distance migration between pelagic summer feeding areas and costal spawning sites. A total of 17 tagged fish were recaptured, with two fish tagged in the east of Iceland ending up on the coast of Denmark, a staggering 1,612 km away.</p><p>This study by Kennedy et al. (<span>2024</span>) has shown that you cannot always judge a book by its cover, with lumpfish covering herculean distances. However, perhaps more importantly, the patterns of recapture support the Norwegian Sea being a common feeding area for several distinct populations of lumpfish, which is important information for the management of the species.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":"106 3","pages":"663"},"PeriodicalIF":1.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jfb.16074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717336","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":"Revealing the nocturnal browsing on seaweeds of purely herbivorous fish using infra-red time-lapse cameras.","authors":"Tatsuru Kadota, Tsutomu Noda, Huamei Shao, Naoaki Tezuka","doi":"10.1111/jfb.70024","DOIUrl":"https://doi.org/10.1111/jfb.70024","url":null,"abstract":"<p><p>Herbivorous fish are generally considered to be diurnal feeders, but the disappearance of seaweeds at night has been observed in Japan. We conducted field experiments using an infra-red time-lapse camera to identify fish browsing on seaweed at night at two sites on Fukue Island, western Japan. At both sites, brown chub (Kyphosus bigibbus) were photographed around transplanted seaweed from sunset to sunrise, and the seaweed declined after the appearance of K. bigibbus. This study is the first report of nocturnal browsing in a purely herbivorous fish.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143719749","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 expression of potassium-related ion transporters/channels in the gills of euryhaline Asian sea bass (Lates calcarifer) under salinity change.","authors":"Yu-Chen Ding, Hsin-Ju Chuang, Tsung-Han Lee","doi":"10.1111/jfb.70025","DOIUrl":"https://doi.org/10.1111/jfb.70025","url":null,"abstract":"<p><p>Ion regulation in fish has been intensively studied for decades, primarily focused on the regulation of Na⁺ and Cl^-, the major electrolytes. However, the regulation mechanisms of K⁺ in teleosts, which is critical for maintaining cell function and the functions of important transporters such as Na⁺/K⁺ ATPase (NKA) and Na⁺-K⁺-2Cl^- cotransporter (NKCC), remained poorly understood. Inwardly rectifying K⁺ channel 1.1 (Kir1.1) was recently found to be responsible for potassium excretion in tilapia and medaka but has not been broadly investigated in other species. This study aimed to investigate the branchial expression and localization of Kir1.1 in the gills of the euryhaline Asian sea bass acclimated to fresh water (FW), 10‰ and 20‰ brackish water (BW10 and BW20) and seawater (SW). The gene expression of NKAα1a was the lowest in BW10, whereas that of NKCC1a remained stable in various salinities. The gene expression of Kir1.1a was elevated in BW20 and SW. Using immunofluorescent staining, the basolateral NKCC and apical Na⁺-Cl^- cotransporter (NCC) were identified in the SW ionocytes and the FW/BW ionocytes, respectively. Kir1.1 was visible only in FW and was localized in basolateral membranes. This research not only demonstrated the expression and localization of Kir1.1, NKCC and NKA in Asian sea bass but also discovered a FW-dependent basolateral-localized Kir1.1 expression that might indicate a distinct function from previous research in other teleost species.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710031","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":"Effects of chronic hypoxia on growth performance and nutrient metabolism in the tiger puffer, Takifugu rubripes.","authors":"Renxiao Zhang, Yuliang Wei, Mengqing Liang, Qiang Ma, Houguo Xu","doi":"10.1111/jfb.70029","DOIUrl":"https://doi.org/10.1111/jfb.70029","url":null,"abstract":"<p><p>Chronic hypoxia is a common and harmful stress in aquaculture. However, the effects of chronic hypoxia on nutrients metabolism, muscle quality and three hifα isoforms expressions in marine fish species are unknown. In the present experiment, the tiger puffer was divided into the normoxia group (NO, dissolved oxygen [DO] = 6.5 ± 0.5 mg/L) and the chronic hypoxia group (CH, DO = 3.5 ± 0.5 mg/L) for 8 weeks. The growth performance, nutrient metabolism, muscle texture, amino acid and fatty acid compositions were measured. The results showed that chronic hypoxia reduced the weight gain, viscerosomatic index, fish crude lipid content, muscle adhesiveness and chewiness, but increased the feed conversion ratio, fish crude protein content and liver n-3 polyunsaturated fatty acid level. Chronic hypoxia increased glucose and triglyceride contents in the serum, but reduced serum total protein level. Meanwhile, chronic hypoxia inhibits anaerobic glycolysis and lactate content by reducing hif1α, hif3α and glycolysis (hk1 and pfk) related gene expressions in the liver and muscle. Chronic hypoxia reduces liver total protein level by increasing protein synthesis (mtor and glud1) and catabolism (gcn2 and uba1) related genes expression simultaneously. Chronic hypoxia suppresses muscle metabolism by reducing the expression of glucose, lipid, protein and insulin pathway related genes. Our results clarified the effects of chronic hypoxia on growth and nutrients metabolism in tiger puffer, which improved our understanding of hypoxia adaptive mechanism in fish.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710068","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":"Longitudinal distribution of environmental DNA of a salmonid fish, white-spotted charr Salvelinus leucomaenis, in a small stream.","authors":"Shoichiro Yamamoto","doi":"10.1111/jfb.70030","DOIUrl":"https://doi.org/10.1111/jfb.70030","url":null,"abstract":"<p><p>Environmental DNA (eDNA) analysis holds significant promise for monitoring aquatic ecosystems. This study examined the relationship between longitudinal distribution, biomass and eDNA concentrations of Salvelinus leucomaenis in a small stream using conventional electrofishing gear and eDNA analysis in parallel. No consistent trend in the relationship between estimated S. leucomaenis biomass and eDNA concentrations or eDNA fluxes at each 20-m site along the stream was observed, making it difficult to estimate the spatial distribution of S. leucomaenis in streams. However, mean eDNA concentrations across the study area corresponded well with temporal changes in total S. leucomaenis biomass, indicating that multisite sampling using eDNA can be applied to estimate the relative biomass of S. leucomaenis in streams.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710079","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":"New larval records in the southwestern Atlantic and global distribution patterns of daggertooth Anotopterus pharao (Aulopiformes: Anotopteridae).","authors":"Henrique Grande, Érico S L G Santos, Gabriel Vilanova, Mario Katsuragawa, Cláudia A P Namiki, Frederico P Brandini","doi":"10.1111/jfb.70027","DOIUrl":"https://doi.org/10.1111/jfb.70027","url":null,"abstract":"<p><p>This study presents new larval records of daggertooth fish Anotopterus pharao (Aulopiformes: Anotopteridae) in the southwestern Atlantic and explores its global distribution patterns. This species is extensively distributed in oceans, with concentrations in subtropical, temperate and polar regions. We found new records at depths between 550 and 1100 m, associated with Antarctic Intermediate Water. We collected eight larvae at different developmental stages: preflexion (n = 4), flexion (n = 3) and postflexion (n = 1). The presence of preflexion larvae suggests reproduction in southeastern Brazil. Additionally, their occurrence at great depths in lower latitude may indicate potential strategies such as latitudinal migration for reproduction and vertical migration to avoid thermal stress.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710023","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}