The Spatial Dynamics of Japanese Sardine (Sardinops sagax) Fishing Grounds in the Northwest Pacific: A Geostatistical Approach
文献类型： 外文期刊
作者： Tang, Yongzheng 1 ; Gong, Yuanting 1 ; Zhang, Heng 2 ; Zhao, Guoqing 2 ; Tang, Fenghua 2 ;
作者机构： 1.Yantai Univ, Sch Ocean, Yantai 264005, Peoples R China
2.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
3.Minist Agr & Rural Affairs, Key Lab Ocean & Polar Fisheries, Beijing 100125, Peoples R China
关键词：
期刊名称：ANIMALS （ 影响因子：2.7； 五年影响因子：3.2 ）
ISSN： 2076-2615
年卷期： 2025 年 15 卷 11 期
页码：
收录情况： SCI
摘要： The Japanese sardine (Sardinops sagax), a key economic species in the Northwest Pacific Ocean (NWPO), has shown significant increases in both population abundance and catch volume over the past decade. To understand its spatiotemporal dynamics under climate change, this study analyzed light purse seine fishery data (2014-2021) from the NWPO. The results showed that the primary fishing season spans March to December, with peak catches concentrated in 40-43 degrees N, 149-155 degrees E. Annual catches grew steadily, accelerating notably in 2021. The fishing grounds' center shifted northeastward annually and seasonally (southwest-to-northeast trajectory), driven by directional aggregation. Spatial clustering with global positive autocorrelation was observed, weakening as distance thresholds increased. Resource hotspots migrated northeast, narrowing from 40-42 degrees N (2016) to 42-44 degrees N (2017-2021), while coldspots showed complementary fluctuations. Generalized additive model (GAM) analysis revealed that the catch per unit effort (CPUE) of Japanese sardine in the high seas of the NWPO was governed by temporal-spatial drivers and multivariate environmental determinants. Analytical findings substantiate the significant climate-driven impacts on the spatiotemporal distribution and population dynamics of Japanese sardine. The non-stationary interannual and seasonal patterns of fishing grounds highlight the need for adaptive management strategies.
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