Community characteristics of phototropic pelagic fish in the west-central South China Sea upwelling region during the summer

Yu Jie; Tang Zhenzhao; Chen Zuozhi; Chen Guobao

doi:10.12284/hyxb2025050

Volume 47 Issue 5

May 2025

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Yu Jie，Tang Zhenzhao，Chen Zuozhi, et al. Community characteristics of phototropic pelagic fish in the west-central South China Sea upwelling region during the summer[J]. Haiyang Xuebao，2025, 47(5)：87–98 doi: 10.12284/hyxb2025050

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Community characteristics of phototropic pelagic fish in the west-central South China Sea upwelling region during the summer

doi: 10.12284/hyxb2025050

Yu Jie^{1, 3, 4
,},
Tang Zhenzhao^{1, 3
,
,},
Chen Zuozhi^{1, 2, 4},
Chen Guobao^{1, 3, 4}

1.
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
2.
Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture Rural Affairs, Guangzhou 510300, China
3.
Key Laboratory of Marine Ranching, Ministry of Agriculture and Rural Affairs/ National Digital Fisheries (Marine Ranching) Innovation Sub-Center/ Scientific Observing and Experimental Station of South China Sea Fishery Resources and Environments, Ministry of Agriculture and Rural Affairs/ Guangdong Engineering Technology Research Center of Marine Recreational Fishery, Guangzhou 510300, China
4.
Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou 510300, China

Received Date: 2024-12-12
Rev Recd Date: 2025-02-11

Available Online: 2025-05-16

Publish Date: 2025-05-30

Abstract

Abstract

To understand the characteristics of fish communities in the upwelling waters of the west-central South China Sea, data from the 2014 summer light falling-net fishery resources survey were utilized to study the species composition, biodiversity, and community structure of phototropic pelagic fish communities. There are 13 fish species in the upwelling core region, belonging to 11 genera in 3 orders and 8 families, with the dominant species being the Cubiceps squamiceps; 11 species of fish were collected from the upwelling periphery region, belonging to 10 genera in 2 orders and 8 families, with the dominant species being the Auxis thazard and Thunnus obesus. The fish diversity index, richness index, and evenness index were lower in the upwelling core region than in the periphery waters. The average catch rate in the upwelling core region was 45.9 kg/h, 1.63 times higher than that in the periphery region. PERMANOVA analysis showed that the fish communities in the upwelling core region and the periphery region had marginally significant differences in fish communities, with the main divergent species being Cubiceps squamiceps, Auxis thazard, Decapterus macrosoma, Thunnus obesus, and Auxis rochei. Correlation analysis showed that sea surface chlorophyll a mass concentration was the most important environmental factor influencing the spatial distribution of fish abundance.
- light falling-net,
- fish,
- community structure,
- the west-central South China Sea,
- upwelling

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References(42)

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