东南印度洋长鳍金枪鱼延绳钓渔场探捕浅析

Initial analysis on exploring fishing ground for albacore longline in the Southeast Indian Ocean

为拓展渔场范围、促进潜在渔业资源的合理利用,2018年4—7月(作业天数79 d),以金枪鱼延绳钓渔船“新世纪八十六号”为探捕平台,采用目前通用的长鳍金枪鱼(Thunnus alalunga)延绳钓钓具配置,在东南印度洋(24°10′S^35°33′S,75°15′E^98°50′E)海域进行探捕调查作业,共捕获长鳍金枪鱼5252尾、78906 kg,占总渔获尾数和质量比例分别为80%和71%,平均上钩率达到18‰,表明该渔场长鳍金枪鱼资源具有较好的开发前景。在兼捕种类中,剑鱼(Xiphias gladius)、异鳞蛇鲭(Lepidocybium flavobrunneum)及斑点月鱼(Lampris guttatus)的渔获量较大,其资源利用前景有待进一步研究。

In order to expand the fishing ground and utilize potential fishery resources reasonably,exploratory fishing operation was made in the Southeast Indian Ocean(24°10′S^35°33′S,75°15′E^98°50′E)by tuna longline vessel“Xin Shi Ji 86”as a platform from April to July in 2018(79 operation days).The vessel equipped with ordinary albacore(Thunnus alalunga)longline caught a total of 5252 albacore individuals with a total weight of 78906 kg,accounting for 80%of total catch number and 71%of total catch weight,and the average hook rate reached 18‰,indicating that albacore tuna resource possessed a promising exploring prospect in this fishing ground.Moreover,the bycatch species showed a high proportion of sword fish(Xiphias gladius),oil fish(Lepidocybium flavobrunneum)and moonfish(Lampris guttatus),whose exploratory prospect should be further researched.