Temporal Pattern of the Occurrence of Japanese Glass Eels (Anguilla japonica) in the Pearl River Estuary
文献类型： 外文期刊
作者： Shuai, Fangmin 1 ; Li, Jie 1 ; Yu, Shunchao 2 ; Yang, Jian 3 ;
作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China
2.Pearl River Hydraul Sci Res Inst, Minist Water Resources, Key Lab Pearl River Estuary Regulat & Protect, Guangzhou 510611, Peoples R China
3.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Ecol Environm & Resources Inland Fisheries, Wuxi 214081, Peoples R China
关键词： Anguilla japonica; glass eels; Pearl River estuary; temporal pattern; CPUE; ARIMA model
期刊名称：FISHES （ 影响因子：2.3； 五年影响因子：2.4 ）
ISSN：
年卷期： 2023 年 8 卷 5 期
页码：
收录情况： SCI
摘要： Japanese eels (Anguilla japonica) are a typical migratory fish species with high commercial importance. The Pearl River estuary in southern China is an important natural growing ground for Japanese glass eels, but limited information on Japanese glass eel population characteristics is available, despite their ecological importance. In this paper, we examined the annual patterns of the occurrence of Japanese glass eels in the Pearl River estuary from 2011 to 2022. The most frequently occurring Japanese glass eel's total length is 5.3 cm. The collecting period extended from December to February, and the collection catch-per-unit-effort (CPUE) decreased significantly from 2011 to 2022. The generalized linear model (GLM) indicated that daily changes in Japanese glass eel collection were significantly affected by tidal range, water temperature, and lunar distance. The catch peak appeared when the tidal range rose to 1.7 m, and the water temperature dropped below 8 ? on the full moon days. Overall CPUE analysis showed no significant periodic and inter-annual variability in the period 2011-2022, with the ARIMA model suggesting that the CPUE is expected to remain stable but low in the coming years (2023-2026), although recruitment ultimately depends on the overall spawning stock.
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