Analysis of fish aggregation devices（FAD_s） closure measures impacting on catches of skipjack tuna Katsuwonus pelamis in the Western and Central Pacific Ocean
HE Shan1, WANG Xue-fang1,2,3, DAI Xiao-jie1,2,3, Kindong R1,2,3, XU Liu-xiong1,2,3
1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; 2.Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture, Shanghai 201306, China; 3.Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture, Shanghai 201306, China
Abstract: The catches of skipjack tuna Katsuwonuspelamis were compared in fish aggregation devices (FADs) closure and the non-FADs closure in the Western and Central Pacific Ocean by Chinese tuna purse seine fisheries data from 2012 to 2015 to evaluate the impact of FADs closure measures on catches of skipjack tuna. The results showed that the proportion of skipjack tuna accounting for more than 80% of the total catch by data from Chinese purse seine fleet from 2012 to 2015, without significant fluctuation. There was a dramatic decline in proportion of skipjack tuna accounting for the total catches during the non-FADs closure in 2015. The decrease both in average catch per vessel and per net of skipjack tuna was observed after 2012, maybe involved in the extension of FADs closure measures. The K-S test revealed that there were significant differences in both the average catch per vessel and per net of skipjack tuna during the FADs closure and the non-FADs closure from 2013 to 2015 (P<0.05). The maximal monthly average catch per vessel and per net of skipjack tuna were found in the first month at the end of the FADs closure. These findings indicated that the implementation and extension of FADs closure measures had impact on skipjack tuna catches to some extent, and that Chinese purse seine fleet needed to improve fishing efficiency for free fish school to facility conservation and management measures.
何珊, 王学昉, 戴小杰, Kindong R, 许柳雄. 中西太平洋人工集鱼装置禁渔期措施对中国大陆金枪鱼围网船队鲣产量特征的影响[J]. 大连海洋大学学报, 2017, 32(5): 611-616.
HE Shan, WANG Xue-fang, DAI Xiao-jie, Kindong R, XU Liu-xiong, . Analysis of fish aggregation devices（FAD_s） closure measures impacting on catches of skipjack tuna Katsuwonus pelamis in the Western and Central Pacific Ocean. Journal of Dalian Ocean University, 2017, 32(5): 611-616.
2017, Vol. 32 
