Page 94 - 《水产学报》2025年第5期

张子硕，等 水产学报, 2025, 49(5): 059308

Seasonal changes of community structure of fish and crustaceans in
the adjacent waters of Shengsi Ma’an Islands

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ZHANG Zishuo , XU Yongjiu , ZHANG Xiumei , CHEN Feng , ZHOU Yongdong ,
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XU Kaida , ZHANG Yazhou , ZHANG Hongliang , LI Qingying , LIU Wanjin , YU Jia 1
1. School of Fisheries, Zhejiang Ocean University, Zhoushan 316022, China;
2. Marine Fisheries Research Institute of Zhejiang Province, Zhoushan 316021, China
Abstract: The sea area near the Ma'an Islands in Shengsi has complex natural conditions and is a spawning ground, feeding
ground, and migration channel for many fishes and crustaceans. In order to study the effects of environmental factors, seasonal
fishing suspension and other factors on the seasonal dynamic succession of fish and crustacean community structure, based on
the survey data of fish and crustacean swimmers in the adjacent waters of Shengsi Ma'an Islands in Zhejiang Province in four
quarters of 2021, this study employed One-Way analysis of variance (ANOVA), similarity percentage analysis (SIMPER) and
non-parametric multivariate analysis of variance (PERMANOVA) to study the seasonal changes of the average resource dens-
ity and average individual size of the two groups. RDA analysis was used to study the relationship between seasonal fishing
bans and environmental changes and the two taxa and their dominant species. The results showed that a total of 103 species
were caught, including 53 species of fish, 50 species of crustaceans, 5 species of dominant species (Harpadon nehereus, Coilia
mystus, Trichiurus lepturus, Larimichthys polyactis and Collichthys lucidus), and 3 species of crustaceans (Oratosquilla ora-
toria, Portunustri tuberculatus, and Charybdis japonica). There were significant seasonal differences in the community struc-
ture composition of fish and crustaceans (average resource density and individual size), but there were no significant regional
differences. The average density of fish and crustaceans increased from spring to autumn and then slowly decreased in winter,
whereas the average individual size was the smallest in spring and larger in other seasons, especially in summer. The results of
the RDA analysis showed that fishing pressure was the main factor that significantly affected the seasonal variation of average
resource density and average individual size of fish and crustaceans (RDA1), and the seasonal variation in the functional char-
acteristics of fish and crustaceans was closely related to fishing pressure and environmental factors caused by fishing bans. This
study shows that fishing bans and environmental factors have a significant impact on the functional characteristics (number and
individual size) of fishery ecosystems, and further research on long-term changes in functional characteristics needs to be con-
ducted. The results of this study can provide scientific basis and reference for the evaluation of marine protected areas and the
sustainable utilization of fishery resources.
Key words: community structure; seasonal variation; fishing ban; environmental factors; Shengsi sea area; Ma'an Islands
Corresponding author: XU Yongjiu. E-mail: xuyongjiu@zjou.edu.cn
Funding projects: Zhejiang Province Natural Science Foundation (LY20C030004); Special Fund for the Key Research and
Development Project of Zhejiang Province (2021C02047)

https://www.china-fishery.cn 中国水产学会主办 sponsored by China Society of Fisheries
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