西南大西洋公海阿根廷滑柔鱼性成熟的初步研究  

Sex maturity of Illex argentinus in the high sea waters of southwest Atlantic

作　　者：刘必林[1,2] 陈新军[1,2] 田思泉[1,2] 钱卫国[1,2] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]大洋生物资源开发和利用上海市高校重点实验室,上海201306

出　　处：《上海水产大学学报》2008年第6期721-725,共5页Journal of Shanghai Fisheries University

基　　金：教育部新世纪优秀人才计划项目(NCET-06-0437);农业部智利外海茎柔鱼探捕项目(科06-65);上海市重点学科建设(T1101);上海水产大学校青年基金(科07-254)

摘　　要：根据2007年2-5月我国鱿钓船在西南大西洋公海生产期间所采集的阿根廷滑柔鱼(南部巴塔哥尼亚种群)数据,对其性成熟进行分析。结果表明,渔获物雌雄比例约为1.1:1。雌雄性腺成熟度差异大,雄性个体性成熟度高于雌性。雄性Ⅲ、Ⅳ、Ⅴ期占总样本的78.4%,雌性仅占48.1%。雌性群体3月开始大批量性成熟,4月开始大批量产卵;雄性群体2月即开始大量性成熟,并开始交配。经拟合,南部巴塔哥尼亚种群雌雄个体初次性成熟胴长(ML50%)分别为264.9 mm和208.5 mm。Based on the commercial data about Illex argentinus from Chinese jigging vessel in the high sea waters of southwest Atlantic from February to May in 2007, the sex maturity of Illex argentinus was studied. The result indicated that the ratio of females to males was about 1.1 ： 1. Much difference between females and males was determined. The maturity stage of male is higher than that of female, in which stage Ⅲ, Ⅳ and Ⅴ occupied 78.4% of the total in males but accounted for 48.1% in females. For the female squid, the majority matured squid occurred in March and major spawned squid occurred in April. For the male squid, reproductive period lasted a long time, and most of matured squid occurred in February and began mating. By fitting Logistic function, the mantle length of first maturity for females and males were 264.9mm and 208.5mm respectively .

关 键 词：阿根廷滑柔鱼 西南大西洋公海 性比 初次性成熟 

分 类 号：S932[农业科学—渔业资源]