Crab community structure and its relationship with environmental factors in the eastern sea area of Zhoushan Islands

Niu Weizhen; Han Lei; Yu Cungen; Zheng Ji; Xu Yongjiu; Yan Wenchao

doi:10.12284/hyxb2022034

Volume 44 Issue 2

Feb. 2022

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Niu Weizhen，Han Lei，Yu Cungen, et al. Crab community structure and its relationship with environmental factors in the eastern sea area of Zhoushan Islands[J]. Haiyang Xuebao，2022, 44(2)：29–38 doi: 10.12284/hyxb2022034

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Crab community structure and its relationship with environmental factors in the eastern sea area of Zhoushan Islands

doi: 10.12284/hyxb2022034

School of Fisheries, Zhejiang Ocean University, Zhoushan 316022, China

Received Date: 2021-06-08
Rev Recd Date: 2021-10-22

Available Online: 2021-11-29

Publish Date: 2022-02-01

Abstract

Abstract

According to the data collected in April (spring) and October (autumn) of 2018 in the eastern sea area of Zhoushan Islands (29°10′25.54′′−30°45′00′′N, 122°53′3.88′′−124°48′28.31′′E) based on the crab data obtained from bottom trawl survey of fishery resources, the community structure characteristics of crab resources such as species composition, dominant species and biodiversity were studied, and the relationship between crab quantity distribution and community structure and environmental factors such as temperature and salinity was analyzed. The results show that there are 40 species of crabs in spring and autumn, belonging to 23 genera and 12 families; among them, the dominant species in spring is Charybdis bimaculatus, and in autumn are C. bimaculatus and Portunus trituberculatus; the richness index (D) and Shannon Wiener-diversity index (H′) in autumn are higher than those in spring, while Pielou evenness index (J') is similar in spring and autumn; independent sample t-test show that there is significant difference between spring and autumn; according to cluster analysis and non metric multi-dimensional scaling analysis, spring can be divided into four communities, and autumn can be divided into four communities; canonical correspondence analysis show that bottom water temperature and surface salinity are the main environmental factors affecting the community structure and quantity distribution of crabs in the investigated sea area.
- crabs,
- quantity distribution,
- community structure,
- environmental factors,
- eastern sea area of Zhoushan Islands

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References

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