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根据2003年1~6月由中国农业部渔业局资助项目收集的渔业观察员数据和2004年1~6月印度洋中西部海域中国金枪鱼延绳钓生产调查数据,对所捕获的大眼金枪鱼繁殖生物学特征进行了初步研究。结果表明,渔获中性比均值为0.8,各月间的性比差异不显著。叉长小于85 cm或大于185cm时,渔获个体均为雄性;叉长为85~170 cm时,性比约为1.0。各月份大眼金枪鱼雌雄个体的性腺指数变动基本上保持一致,性腺指数随着月份增加而呈下降趋势。
According to the data collected by fisheries observers collected by the Fisheries Administration of the Chinese Ministry of Agriculture from January to June 2003 and the survey data on the production of longline Chinese tuna from January to June 2004 in the Indian Ocean, Characteristics of a preliminary study. The results showed that the average ratio of catches to neuter was 0.8, and there was no significant difference in the sex ratio in each month. Fork length less than 85 cm or more than 185 cm, the catches were all male; fork length of 85 ~ 170 cm, the sex ratio of about 1.0. In each month, the gonadal indices of male and female members of the big-eared tuna were basically the same, while the gonad index showed a decreasing trend with the increase of the month.