The Role of Environmental Factors on the Fishery Catch of the Squid Uroteuthis chinensis in the Pearl River Estuary, China

文献类型： 外文期刊

第一作者： Wang, Dongliang

作者： Wang, Dongliang;Yu, Jing;Chen, Pimao;Wang, Dongliang;Yao, Lijun

作者机构：

关键词： Uroteuthis chinensis; environmental factors; generalized additive model; remote sensing; Pearl River Estuary

期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.458； 五年影响因子：2.455 ）

ISSN：

年卷期： 2021 年 9 卷 2 期

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收录情况： SCI

摘要： The Pearl River Estuary (PRE) is one of the major fishing grounds for the squid Uroteuthis chinensis. Taking that into consideration, this study analyzes the environmental effects on the spatiotemporal variability of U. chinensis in the PRE, on the basis of the Generalized Additive Model (GAM) and Clustering Fishing Tactics (CFT), using satellite and in situ observations. Results show that 63.1% of the total variation in U. chinensis Catch Per Unit Effort (CPUE) in the PRE could be explained by looking into outside factors. The most important one was the interaction of sea surface temperature (SST) and month, with a contribution of 26.7%, followed by the interaction effect of depth and month, fishermen's fishing tactics, sea surface salinity (SSS), chlorophyll a concentration (Chl a), and year, with contributions of 12.8%, 8.5%, 7.7%, 4.0%, and 3.1%, respectively. In summary, U. chinensis in the PRE was mainly distributed over areas with an SST of 22-29 degrees C, SSS of 32.5-34 parts per thousand, Chl a of 0-0.3 mg x m(-3), and water depth of 40-140 m. The distribution of U. chinensis in the PRE was affected by the western Guangdong coastal current, distribution of marine primary productivity, and variation of habitat conditions. Lower stock of U. chinensis in the PRE was connected with La Nina in 2008.

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