刘必林;陈新军;钟俊生;

• 1:上海海洋大学海洋科学学院
• 2:上海海洋大学大洋生物资源开发和利用上海高校重点实验室
• 3:上海海洋大学水产与生命学院

摘要：

利用2004—2005年中国鱿钓渔船资源探捕期间在印度洋西北部采集的104枚鸢乌贼Sthenoteuthisoualaniensis耳石样本,对其年龄和生长进行了研究。鸢乌贼的生命周期约为1年,样本年龄为88~363 d,优势年龄组为180~270 d,占总体的81.3%。样本孵化日期为2004年1—11月,几乎为全年性,但存在两个峰值:3—5月和9—10月,分别占总体的57.8%和14.4%。根据孵化日期可将鸢乌贼分为春季和秋季两个产卵群体。两产卵群体胴长与年龄符合线性方程,而体重与年龄符合指数方程模式。各胴长组间的瞬时相对生长率和绝对生长率存在变化,不同群体之间的瞬时相对生长率和绝对生长率差异明显。

关键词： 鸢乌贼;耳石;年龄和生长;印度洋西北海域

Abstract: The age and growth of squid Sthenoteuthis oualaniensis were studied using 104 statoliths collected in the Chinese squid jigging surveys from October 2004 to January 2005.It was found that the squid had a life span of about one year,the samples being 88 to 363 day old,81.3% ranging from 180 to 270 day old.The incubation samples were found almost throughout the year from January to November in 2004,with two peaks of March to May and September to October,accounting for 57.8% and 14.4% of the total,respectively.Two distinct spawning groups were observed in spring and autumn.The relationship between mantle length and age was described by the linear function and the relationship between body weight and age the exponent functions in the two spawning groups.The instantaneous relative growth rate and absolute growth rate were found to be varied with the sizes,with significant difference between the groups of squid with the same age.

Keywords: Sthenoteuthis oualaniensis;statolith;age and growth;northwest Indian ocean

基金项目: 新世纪优秀人才计划项目(NCET-06-0437);; 上海市重点学科项目(S30702);; 国家科技支撑计划项目(2006BAD09A05)

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