智利外海茎柔鱼繁殖生物学初步研究  

Preliminary study on reproductive biology of Dosidicus gigas in the high seas off Chile

作　　者：刘必林[1,2,3] 陈新军[1,2,3] 钱卫国[1,2,3] 陆化杰[1] 李思亮[1] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]上海海洋大学大洋生物资源开发和利用上海市高校重点实验室,上海201306 [3]上海海洋大学大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306

出　　处：《上海海洋大学学报》2010年第1期68-73,共6页Journal of Shanghai Ocean University

基　　金：国家自然科学基金(NSFC40876090);上海市曙光跟踪计划(08GG14);上海市教委优秀青年基金(SSC-07012);上海市教委科研创新计划(10YZ127);上海市重点学科建设(S03702)

摘　　要：对2007年-2009年我国鱿钓船在东南太平洋智利外海生产期间所采集的1 374个茎柔鱼样品性成熟度进行观察,初步研究了其繁殖生物学特性。结果表明:智利外海茎柔鱼为大型群体,常年产卵,无明显的产卵高峰期。渔获物雌雄比例约为2.65∶1。雌、雄个体性腺成熟度差异不明显,其中成熟个体所占比例小,分别占总量的3.9%和6.7%。缠卵腺长和缠卵腺重随着性腺成熟度增加逐步增大,成熟个体性腺指数明显大于未成熟个体。雌、雄个体性腺指数存在差异,雌性个体Ⅳ期性腺指数与胴长成正比,而雄性则成反比。雌性和雄性茎柔鱼的初次性成熟胴长(ML50%)分别为638.3 mm和565.3 mm。Based on the samples for Dosidicus gigas collected by Chinese jigging vessel in the high seas off Chile from 2007 to 2009, the sex maturity of the squid was studied. The result indicated that the individuals captured were large-sized group, there is a reproductive cycle throughout the year without peak. The ratio of females to males was about 2.65： 1. No significant difference of sex maturity between females and males was determined, however only a small part of matured individuals existed, which accounted for 3.9 and 6.7 percent of the total for females and males respectively. Nidamental gland length and weight increase with sex maturity growth gradually. There was difference of gonad somatic index （GSI） between females and males, and GSI of individuals in stage 1Vfor the females showing positive linear correlation with mantle length, but for males showing negative correlation. The mantle length of first maturity for females and males was 638.3 mm and 565.3mm respectively.

关 键 词：茎柔鱼 智利外海 性比 性成熟 缠卵腺指数 性腺指数 

分 类 号：S932.4[农业科学—渔业资源]