Fu Yingyue, Wu Xiaoci, Jin Pengchao, Chen Xinjun, Xing Qinwang, Chai Fei, Cao Jie, Yu Wei
College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai, 201306, China.
College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai, 201306, China; National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai, 201306, China.
Mar Environ Res. 2025 Sep;210:107337. doi: 10.1016/j.marenvres.2025.107337. Epub 2025 Jun 30.
The purpleback flying squid (Sthenoteuthis oualaniensis) is widely distributed in the Arabian Sea and highly sensitive to environmental changes. Mesoscale eddies largely occur in the Arabian Sea, playing a significant role in regional biogeochemical processes. However, the impact of eddies on squid abundance is not well studied. Therefore, mesoscale eddies impacts on abundance and spatial distribution of S. oualaniensis were investigated in this study. The results indicated that the monthly catch-per-unit-effort (CPUE) of S. oualaniensis correlated with the variation in the number of eddies, and CPUE within cyclonic eddies (CE) was higher than that within anticyclonic eddies (AE). Sea surface temperature (SST), chlorophyll-a concentration (Chl-a), and dissolved oxygen at 150 m (DO150m) strongly affected the abundance of S. oualaniensis, showing distinct spatial distributions within CEs and AEs. These three key environmental factors were used to construct a habitat suitability index (HSI) model to evaluate the habitat distribution characteristics of S. oualaniensis within CEs and AEs, and results demonstrated CEs were more suitable. Within CEs, suitable SST and relatively lower DO150m aid in the growth and predator avoidance of S. oualaniensis. Overall, the eddies in the Arabian Sea regulate the abundance and distribution of S. oualaniensis, with CEs providing a more suitable habitat.
鸢乌贼（Sthenoteuthis oualaniensis）广泛分布于阿拉伯海，且对环境变化高度敏感。中尺度涡旋大量出现在阿拉伯海，在区域生物地球化学过程中发挥着重要作用。然而，涡旋对鱿鱼丰度的影响尚未得到充分研究。因此，本研究调查了中尺度涡旋对鸢乌贼丰度和空间分布的影响。结果表明，鸢乌贼的月单位捕捞努力量（CPUE）与涡旋数量的变化相关，气旋涡（CE）内的CPUE高于反气旋涡（AE）内的CPUE。海表面温度（SST）、叶绿素a浓度（Chl-a）和150米深度处的溶解氧（DO150m）强烈影响鸢乌贼的丰度，在气旋涡和反气旋涡内呈现出明显的空间分布。利用这三个关键环境因子构建了栖息地适宜性指数（HSI）模型，以评估鸢乌贼在气旋涡和反气旋涡内的栖息地分布特征，结果表明气旋涡更适宜。在气旋涡内，适宜的海表面温度和相对较低的150米深度处溶解氧有助于鸢乌贼的生长和躲避捕食者。总体而言，阿拉伯海的涡旋调节着鸢乌贼的丰度和分布，气旋涡提供了更适宜的栖息地。
