Page 244 - 《水产学报》2026年第04期

4 期 王子琦，等：舟山渔场主要虾类资源状况及与环境因子的关系 50 卷

Shrimp resource dynamics and environmental drivers in
the Zhoushan Fishing Ground

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WANG Ziqi , ZHANG Yazhou , JIANG Rijin , HE Zhouting 2
(1. Marine and Fisheries Research Institute, Zhejiang Ocean University, Zhoushan 316021, China;
2. Key Research Station for Fisheries Resources of Main Fishing Ground, Ministry of Agriculture and Rural Affairs,
Zhoushan Field Integrated Scientific Observation and Research Station, Ministry of Agriculture and Rural Affairs,
Key Research Station of Sustainable Utilization for Marine Fisheries Resources of Zhejiang Province,
Zhejiang Institute of Marine Fisheries Research, Zhoushan 316021, China)

Abstract: This study investigated spatiotemporal variability in the major shrimp resources of the Zhoushan Fishing Ground
from 2020 to 2024 and evaluated the development status of the beam trawl shrimp fishery, with the aim of providing a solid sci-
entific basis for future fisheries policy development. Using contemporaneous beam trawl logbook data and remote-sensing-
derived environmental variables-dissolved oxygen (DO), sea surface temperature (SST), sea surface salinity (SSS), and chloro-
phyll-a (Chl.a) concentration-we applied center-of-gravity analysis and generalized additive models (GAMs) to quantify distri-
bution patterns of major shrimp resources and their associations with environmental drivers.The shrimp catch composition was
dominated by Metapenaeopsis barbata (23.30%) and Solenocera crassicornis (23.24%). The centers of gravity of these two
shrimp resources were located within 30°10′-30°51′N and 124°40′-125°01′E. The centers of gravity exhibited limited vari-
ability during 2020–2021 and 2023–2024, whereas they shifted southwestward from 2021 to 2022 and subsequently turned
northeastward from 2022 to 2023. Resource density was significantly associated with year, month, longitude, and latitude. For
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S. crassicornis, the key environmental factors were SST, DO, and Chl.a, with optimal ranges of 14-23°C, 200-250 mmol/m ,
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and 0-40 mg/m , respectively. In contrast, M. barbata was primarily influenced by SST and Chl.a, with optimal ranges of 15-30
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°C and 30-50 mg/m , respectively. Overall, shrimp resources remained generally stable from 2020 to 2024, and both catch and
CPUE increased markedly following the seasonal fishing moratorium.Extreme weather events and oceanographic variability
may substantially affect shrimp distribution and yield. The observed fluctuations in the distributional center of gravity may
reflect the combined effects of environmental forcing and fisheries management policies. The CPUE of the two shrimp species
showed pronounced spatiotemporal variability, closely related to their reproductive periods and growth cycles. Collectively, the
results indicate that SST, Chl.a, and DO are dominant drivers of shrimp distribution and abundance in the Zhoushan Fishing
Ground, and that environmental variability together with fisheries management jointly shapes the spatiotemporal dynamics of
shrimp resources.
Key words: beam trawl shrimp fishery; fishing ground focus; resource density; generalized additive model; spatiotemporal
environmental factors; Zhoushan Fishing Ground
Corresponding author: ZHANG Yazhou. E-mail: 13868237659@163.com
Funding projects: National Key R & D Program of China (2024YFD2400405); Research and Application of Fisheries
Resource Monitoring, Survey, and Sustainable Utilization Technology in Zhejiang Fishery (HYS-CZ-202502); Investigation
and Assessment of Spawning Grounds of Important Economic Species in Offshore Zhejiang (HYS-CZ-202505)

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