{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T07:49:04Z","timestamp":1791532144158,"version":"4.3.4"},"reference-count":47,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Fish Biology"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The feeding ecology of the critically endangered catfish\n                    <jats:italic>Eutropiichthys vacha<\/jats:italic>\n                    was examined across ontogenetic stages and seasonal hydrological phases in the Chalan Beel floodplain wetland of Bangladesh. A total of 300 individuals were sampled across three hydrological seasons (monsoon, post\u2010monsoon and pre\u2010monsoon). Diet composition was analysed using stomach content examination, feeding morphology was quantified from mouth dimensions and trophic structure was assessed using Levin's niche breadth, Morisita\u2013Horn dietary overlap, multivariate ordination, ratio of within\u2010individual component to total niche width (WIC\/TNW) ratios and Amundsen plots. Six prey categories were identified from non\u2010empty stomachs, with zooplankton and crustaceans dominating diets across size classes and seasons. Mouth area increased significantly with body size, indicating ontogenetic scaling of feeding capacity. However, dietary breadth and prey richness showed limited variation across size classes, indicating no clear ontogenetic expansion of niche width. Feeding incidence varied seasonally, with the highest proportion of empty stomachs recorded during the pre\u2010monsoon period and substantially higher feeding activity during the monsoon and post\u2010monsoon periods. Dietary overlap remained consistently high across size classes (C\u2009=\u20090.987\u20130.998) and seasons (C\u2009=\u20090.985\u20130.996), indicating strong conservation of population\u2010level diet composition. High WIC\/TNW values further indicated limited individual specialization. These findings demonstrate that\n                    <jats:italic>E.\u2009vacha<\/jats:italic>\n                    exhibits a tropically flexible but strongly generalist feeding strategy, driven by consistent reliance on abundant prey resources in a dynamic floodplain ecosystem.\n                  <\/jats:p>","DOI":"10.1111\/jfb.70684","type":"journal-article","created":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T06:52:03Z","timestamp":1791528723000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ontogenetic niche expansion and seasonal trophic plasticity in a critically endangered floodplain catfish species"],"prefix":"10.1111","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6129-5100","authenticated-orcid":false,"given":"Arun Chandra","family":"Barman","sequence":"first","affiliation":[{"name":"Section of Coastal and Marine Fisheries Management, Department of Fisheries Resources and Management, Faculty of Fisheries Habiganj Agricultural University  Habiganj Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Subrina","family":"Nusrat","sequence":"additional","affiliation":[{"name":"Department of Fisheries, Faculty of Fisheries University of Rajshahi  Rajshahi Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rifa Tamanna","family":"Mona","sequence":"additional","affiliation":[{"name":"Department of Fisheries, Faculty of Fisheries University of Rajshahi  Rajshahi Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Md. Abdus","family":"Satter","sequence":"additional","affiliation":[{"name":"Jamalpur Science and Technology University  Jamalpur Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Md. Abu Sayed","family":"Jewel","sequence":"additional","affiliation":[{"name":"Department of Fisheries, Faculty of Fisheries University of Rajshahi  Rajshahi Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7052-7233","authenticated-orcid":false,"given":"Md. Ayenuddin","family":"Haque","sequence":"additional","affiliation":[{"name":"Section of Coastal and Marine Fisheries Management, Department of Fisheries Resources and Management, Faculty of Fisheries Habiganj Agricultural University  Habiganj Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,8]]},"reference":[{"key":"e_1_2_9_2_1","first-page":"83","article-title":"Food and feeding habits of freshwater catfish Eutropiichthys vacha (Bleeker)","volume":"1","author":"Abbas A.","year":"2010","journal-title":"Indian Journal of Scientific Research"},{"issue":"2","key":"e_1_2_9_3_1","first-page":"1","article-title":"Biochemical variation among some species of pond fishes","volume":"2","author":"Ali S. S. 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