Environmental Effects on the Spatiotemporal Variability of Fish Larvae in the Western Guangdong Waters, China

文献类型： 外文期刊

第一作者： Feng, Yuting

作者： Feng, Yuting;Yu, Jing;Lin, Zhaojin;Feng, Yuting;Zhao, Hui;Yao, Lijun;Zhao, Hui;Yu, Jing

作者机构：

关键词： fish larvae; environmental effects; spatiotemporal variability; generalized additive model; western Guangdong waters

期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.033； ）

ISSN：

年卷期： 2021 年 9 卷 3 期

页码：

收录情况： SCI

摘要： Spawning grounds occupy an important position in the survival and reproduction of aquatic life, which plays an important role in the replenishment of fishery resources, especially in the China coasts where fishery resources are depleting. This study investigated environmental effects on the spatiotemporal variability of fish larvae in the western Guangdong waters (WGWs), on the basis of generalized additive models (GAMs) and center of gravity (CoG). Satellite data including sea surface salinity (SSS), sea surface temperature (SST), and in situ observations for fish larvae from April to June in 2014-2015 were used. Results showed that 40.3% of the total variation in fish larvae density was explained. SST, SSS, and depth showed positive effects in 23-24 degrees C and 27-30 degrees C, 24-32 PSU, and 0-60 m, and showed negative effects in 24-27 degrees C, 32-34.2 PSU, 60-80 m. Based on the stepwise GAMs, the most important factor was month, with a contribution of 10.6%, followed by longitude, offshore distance, depth, and latitude, with contributions of 7.0%, 7.0%, 6.3%, 4.2%, 3.9%, and 1.3%, respectively. Fish larvae CoG shifted northward by 0.6 degrees N and eastwards by 0.13 degrees E from April to June. The distribution of fish larvae in the WGWs was affected by complex submarine topography in the Qiongzhou Strait, coastal upwelling in the WGWs, and runoff from the Pearl River.

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