广东海洋大学学报Issue(3)：56-64,9.
西沙群岛海域鸢乌贼摄食与繁殖生物学初步研究
Study on Feeding and Reproduction Biology of Purple Flying Squid, Sthenoteuthis oualaniensis in the Western South China Sea
摘要
Abstract
Sthenoeuthis oualaniensis stock is recently exploited by light falling net and is one of important fishery resources in the South China Sea. Biological characteristics, stomach contents and gonad maturity were studied based on 542 specimens of S. oualaniensis randomly collected from fishing vessels in the Xisha Islands waters in 2011. The results showed that the sex ratio of S. oualaniensis was about 1∶1. The male mature period peaked in summer with the average gonad somatic index (GSI) of 1.89,while the female maturation peak occurred in winter with the average GSI at 2.97. Male mantle length ranged from 111 mm to 140 mm with a peak GSI value of 1.92, whereas female mantle length above 171 mm reached a peak GSI at 8.59. The GSI was sexually different(P<0.05), and the mantle lengths at first maturity of S. oualaniensis were female 159 mm and male 83 mm. There was no sexual differences(P>0.05)on average prey weight of S. oualaniensis with the same mantle length range, but maximum prey weight was higher in males than in females. Feeding strength increased with mantle length. Feeding strength was at lower level mainly grade 2 and 3 in summer, and higher level mainly grade 3 and 4 in other seasons. The percentage of level 3 and 4 in spring and winter were 71.02%and 79.02%, respectively. Empty stomach accounted for high proportion in autumn with a value of 16.22%, while in the other seasons were lower than 5%.The diets of S. oualaniensis were fishes, cephalopods and crustaceans, cannibalism was also detected.关键词
鸢乌贼/摄食/繁殖/西沙群岛海域Key words
Sthenoeuthis oualaniensis/feeding/reproduction/the Western South China Sea分类
生物科学引用本文复制引用
张宇美,颜云榕,卢伙胜,郑志伟,易木荣..西沙群岛海域鸢乌贼摄食与繁殖生物学初步研究[J].广东海洋大学学报,2013,(3):56-64,9.基金项目
近海典型渔业水域增殖潜力与环境修复评价技术研究与应用 （）
