Tang Yongzheng, Gong Yuanting, Zhang Heng, Zhao Guoqing, Tang Fenghua
School of Ocean, Yantai University, Yantai 264005, China.
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China.
Animals (Basel). 2025 May 29;15(11):1597. doi: 10.3390/ani15111597.
The Japanese sardine (), 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° N, 149-155° 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° N (2016) to 42-44° 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.
远东拟沙丁鱼是西北太平洋的一种关键经济鱼类，在过去十年中，其种群数量和捕捞量均显著增加。为了解气候变化下其时空动态，本研究分析了西北太平洋的灯光围网渔业数据（2014-2021年）。结果表明，主要捕捞季节为3月至12月，捕捞高峰期集中在北纬40-43°、东经149-155°。年捕捞量稳步增长，2021年显著加速。渔场中心每年和季节性地向东北方向移动（西南至东北轨迹），受定向聚集驱动。观察到具有全球正自相关性的空间聚类，随着距离阈值增加而减弱。资源热点向东北迁移，范围从北纬40-42°（2016年）缩小到北纬42-44°（2017-2021年），而冷点则呈现互补波动。广义相加模型（GAM）分析表明，西北太平洋公海远东拟沙丁鱼的单位捕捞努力量（CPUE）受时空驱动因素和多变量环境决定因素的影响。分析结果证实了气候对远东拟沙丁鱼时空分布和种群动态的重大驱动影响。渔场的非平稳年际和季节模式凸显了适应性管理策略的必要性。
