上海海洋大学学报2011，Vol.20Issue(6)：890-894,5.
夏秋季西北太平洋柔鱼渔业生物学的初步研究
Biological characteristics of Ommastrephes bartramiiin northwest Pacific Ocean
摘要
Abstract
Based on the samples from Chinese squid jigging vessels in the traditional fishing area（150°-165°E,39°-45°N） of northwest Pacific in 2007,the biological characteristics of squid Ommestrephes bartramii were studied.The results showed that the range of mantle length was from 200 to 436 mm and the average mantle length attained 282 mm,the dominant mantle length ranged from 230 to 320 mm which accounted for 81.6 percent of the total.The monthly mantle length of male squid was smaller than that of female,the growth index of relationship between mantle length and body weight was nearly three.The sex ratio of total number accorded with 1∶ 1（P0.05）,but the proportion of mature males was obviously higher than that of females（P0.05）.The sexual maturity stage dominated Ⅰ and Ⅱ,the average maturity stage of females was less than that of males.The length and weight of nidamental gland of squid increased with the growth of gland maturity.Since the composition of mantle length had two modes in samples and immature and mature individuals both exist,it is concluded that the individuals of the catch could be divided into two populations in the northwest Pacific Ocean,i.e.winter-spring cohort with smaller size and autumn-spawning cohort with bigger size,in which the winter-spring cohort dominated in the catch.关键词
柔鱼/西北太平洋/渔业生物学/渔获群体Key words
Ommastrephes bartramii/northwest Pacific Ocean/biological characteristics/population of the catch分类
农业科技引用本文复制引用
李建华,陈新军,刘必林,陆化杰..夏秋季西北太平洋柔鱼渔业生物学的初步研究[J].上海海洋大学学报,2011,20(6):890-894,5.基金项目
教育部博士点基金 （）
国家高技术研究发展计划 （）
国家自然科学基金 （）
国家发改委项目 （）
上海市重点学科建设项目 （）
