上海海洋大学学报2017，Vol.26Issue(2)：271-277,7.DOI:10.12024/jsou.20160301683
印度洋西南部海域大青鲨生物学特性初步研究
Preliminary analysis of biology for the blue shark, Prionace glauca, in the southwest Indian Ocean
摘要
Abstract
In this study,we described and analyzed the fisheries biology of blue shark based on the total of 336 samples collected by China's national tuna long-line fishery observers in the Indian Ocean(1°-33°N,40°-75°W) from October 2012 to September 2014.The results indicated that the dominant fork length of males and females was 150-229.9 cm and 150-250 cm.The captured female-male ratio was near 1:1 and there were no significant differences between the mean fork lengths of male and female.The larger individuals were mainly distributed in the northern Madagascar waters (x =207.6 cm),while the smaller individuals were mainly captured around the southeast Madagascar waters (x =170.9 cm).The mature individuals of bycatch blue shark were much more dominant in northern Madagascar waters than in the Southeast Madagascar waters.Fork length at 50％ maturity was estimated to be 183.6 cm for females and 182.3 cm for males.Squid and long-nose lancetfish had the highest occurrence in stomach contents of the blue shark.This study contributed to a better understanding of fisheries biology of the blue shark in the Indian Ocean and would be useful for evaluating the shark's resources.关键词
大青鲨/延绳钓/马达加斯加/生物学特性Key words
Prionace glauca/long-line/Madagascar/biological parameters分类
农业科技引用本文复制引用
夏萌,高春霞,戴小杰,吴峰..印度洋西南部海域大青鲨生物学特性初步研究[J].上海海洋大学学报,2017,26(2):271-277,7.基金项目
农业部三大洋观察员项目(08-25) （08-25）
上海教委高校新进教师培训及科研启动费项目(2014S10) （2014S10）
