陆化杰,陈新军,刘必林

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

摘要(Abstract)：

根据2007年1～6月和2008年1～5月我国鱿钓船在智利外海调查期间采集的茎柔鱼耳石样本,测量了503枚耳石外部形态参数(雌性348枚,雄性155枚),结合耳石日轮,对耳石生长特性的性别差异进行了研究。结果表明,耳石总长(TSL)、耳石半径(SR)、吻侧区长(RLL)、翼长(WL)及最大宽度(MW)可作为茎柔鱼耳石形态的表征参数。雌雄个体间耳石的生长在5个形态参数上均存在显著性差异,雌性个体TSL与日龄间关系最适为指数函数,SR和RLL为幂函数,MW和WL则为线性函数;雄性个体的TSL、SR和RLL与日龄间的关系最适为幂函数,MW和WL为线性函数。雌性个体TSL、SR、MW、RLL、WL的相对生长率和SR、RLL绝对生长率均随着日龄的增加而先增加后减小,TSL、MW绝对生长率随着日龄的增加而增加,WL绝对生长率则随着日龄增加而呈现波动趋势;雄性个体TSL、SR相对生长率和MW、RLL、WL绝对生长率随着日龄增加先增加后减小,而MW、RLL和WL相对生长率和TSL、SR绝对生长率则随日龄增加呈现波动趋势。研究认为,茎柔鱼耳石生长存在性别差异,通常雌性生长较雄性快。

关键词(KeyWords)： 耳石生长;性别差异;生长率;茎柔鱼;智利外海

Abstract:

Keywords:

基金项目(Foundation): 国家863计划(2012AA092303);; 曙光计划跟踪项目(08GG14);; 上海市优秀学科带头人计划(10XD1402000);; 上海市重点学科(S30702)资助

作者(Author): 陆化杰,陈新军,刘必林

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