Abstract: In order to understand the impact of surface environmental factors in the Arabian sea on seine fisheries, this paper used the production data of China's Indian Ocean towing seine net during 2016-2017 and data of sea surface temperature (SST), sea surface chlorophyll-a concentration (Chl a), sea surface current (SSC) and sea surface height (SSH)) during the same period to analyze statistically the changes of seine net operation center of gravity and relationship between seine net CPUE and surface environmental factors; and also used frequency analysis and empirical cumulative distribution function (ECDF) to calculate the most suitable marine environment interval. The results showed that: The surface environment, purse seine operations and centre of gravity of fishing grounds in the Arabian sea were significantly affected by the Indian Ocean monsoon. Seine net fishery fishing season was mainly during the northeast monsoon period. The fishery gravity center moved in the same direction as the surface monsoon. In winter monsoon, the SST of the fishing ground showed a small fluctuation trend from high to low and then high. The CPUE location moved along with Chl a high concentration value area north-south shrink, and presented a characteristic with north-south moving longitude direction. CPUE located at the right side of sea area with larger flow rate distributed at the west border, presenting in the central region between the highest and lowest values of SSC. During the northeast monsoon period, the optimum SST was 25.5～28℃, Chl a concentration was 0.2～0.5 mg/m3, SSC was 0.05～0.25 m/s, and SSH was 0.20～0.35 m, respectively.

Key words: Arabian sea, sea surface environment, purse seine, central fishing grounds

摘要： 为了解阿拉伯海海表环境因子对围网作业渔场的影响，采用2016-2017年中国印度洋拖围网生产数据和同期海表温度、叶绿素浓度、表层海流和海面高度数据，统计分析了围网作业重心变化，以及围网CPUE与海表环境因子关系，并利用频次分析和经验累积分布函数计算出最适宜的海洋环境区间。结果表明：阿拉伯海的海表环境、围网作业和渔场重心受印度洋季风影响明显，围网渔场渔汛主要在东北季风期间，渔场重心移动方向与表层季风相似。东北季风期间，围网作业渔场的海表温度呈现由高到低再到高的小幅波动趋势。CPUE随着叶绿素浓度高值区域南北收缩，呈现南北移动纬向特征；且CPUE呈径向分布在西边界流速较大的海域右侧，多出现在海流最大值和最低值中间区域。东北季风期间，围网渔场适宜海表温度在25.5～28℃，叶绿素浓度在0.2～0.5 mg/m3，表层海流在0.05～0.25 m/s，海表高度0.20～0.35 m。

关键词: 阿拉伯海, 海表环境, 围网, 中心渔场