生态学杂志2026，Vol.45Issue(8)：2476-2484,9.DOI:10.13292/j.1000-4890.202608.012
长江口以北海域鳗苗资源补充量的环境驱动因素
Environmental drivers of glass eel(Anguilla japonica)recruitment in the north coastal waters of the Yan-gtze River Estuary
摘要
Abstract
To identify the key environmental drivers of glass eel(Anguilla japonica)recruitment in the north coast of the Yangtze River Estuary,we developed a generalized additive model(GAM)using fishing log data from 21 se-lected commercial vessels during the licensed fishing seasons(2022-2024)and ten synchronized environmental variables.The results revealed a significant temporal decline in glass eel resources over the three years,with a pro-gressive delay in the timing of peak catches.In the optimal GAM,sea surface salinity,dissolved inorganic phos-phorus(DIP),and dissolved inorganic nitrogen(DIN)were the key environmental factors influencing glass eel re-cruitment,with explanatory contributions of 17.0％,15.1％,and 13.0％,respectively.DIP showed an oscillating rise with rapid(0.13-0.17 mmol·m-3),slow(0.17-0.25 mmol·m-3),and stable(＞0.25 mmol·m-3)pha-ses.DIN exhibited bimodal oscillations,decreasing(5-6 mmol·m-3),increasing(6-18 mmol·m-3),and then sharply declining(18-20 mmol·m-3).Our results indicated that nutrients(DIP and DIN)and sea surface salini-ty are key environmental drivers influencing glass eel recruitment in the north coast of the Yangtze River Estuary.These findings elevate the role of nutrients from ambiguous background factors to critical determinants of recruitment dynamics,offering a novel perspective for understanding fluctuations in glass eel resources.This new perspective provides a crucial theoretical foundation for the scientific management of glass eel resources.关键词
长江口以北海域/日本鳗鲡/GAM/营养盐/鳗苗汛期Key words
the north coast of the Yangtze River Estuary/Anguilla japonica/GAM/nutrient/eel fry fishing season引用本文复制引用
张成斌,宋大德,李国东,田拓,刘强,王淑艳,梁龙,李佳洋,熊瑛..长江口以北海域鳗苗资源补充量的环境驱动因素[J].生态学杂志,2026,45(8):2476-2484,9.基金项目
国家自然科学基金(32473169)、联合国海洋十年项目(CSK-2/08/2023-KEES)资助. （32473169）
