生态学杂志2026，Vol.45Issue(8)：2485-2493,9.DOI:10.13292/j.1000-4890.202608.002
长江口长吻鮠的食性及其个体与区域差异
Dietary structure and the individual and regional differences of Leiocassis longirostris in the Yangtze River Estuary
摘要
Abstract
The Yangtze Estuary is one of the most important fishing grounds in China,providing favorable ecologi-cal conditions for the survival and reproduction of numerous aquatic organisms.Following the implementation of the Yangtze River fishing ban,populations of economically valuable species such as Leiocassis longirostris have begun to recover.In this study,L.longirostris specimens were collected in May 2024 from the Yangtze River Estuary.Stom-ach content microscopic examinations were conducted to analyze dietary composition and spatial variation.A total of 25 prey taxa were identified,dominated by crustaceans,with the zoeae of the Chinese mitten crab(Eriocheir sinen-sis)overwhelmingly predominant.Diet composition varied across size classes.Juveniles primarily consumed water fleas and E.sinensis zoeae.Subadults mainly fed on E.sinensis zoeae with some individuals beginning to prey on fish,while adults exhibited signs of cannibalism.There was distinct spatial heterogeneity in prey composition among sampling stations,largely influenced by benthic resource distribution and environmental factors.The diversified di-etary structure of L.longirostris reflects its strong adaptability to environmental changes,and crustacean resources-especially E.sinensis-showed substantial recovery following the fishing ban.These findings provide essential base-line data and scientific insights for fisheries resource conservation and ecological management in the Yangtze River Estuary.关键词
长吻鮠/镜检/食性分析/食性选择/长江口Key words
Leiocassis longirostris/microscopic examination/feeding habit analysis/dietary preference/Yangtze River Estuary引用本文复制引用
唐泽平,舒传俊,杨刚,耿智,赵峰,张涛,郦珊..长江口长吻鮠的食性及其个体与区域差异[J].生态学杂志,2026,45(8):2485-2493,9.基金项目
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金项目(2024XT1001)、上海市科学技术委员会科研计划项目(22dz1202703)和上海科技馆长三角城市群生态安全与生物多样性保护实验室资助项目资助. （2024XT1001）
