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| 智利外海茎柔鱼耳石生长特性的性别差异研究 | |
| 引用本文： | 陆化杰,陈新军,刘必林.智利外海茎柔鱼耳石生长特性的性别差异研究[J].广东海洋大学学报,2012(3):55-63. |
| 作者姓名： | 陆化杰 陈新军 刘必林 |
| 作者单位： | 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 3. 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 |
| 基金项目： | 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 |
| 摘 要： | 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： | 耳石生长 性别差异 生长率 茎柔鱼 智利外海 |
Sexual Differences in Growth Characteristics of Statolith from Dosidicus Gigas in the High Sea Waters off Chile |
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| LU Hua-jie,CHEN Xin-jun,LIU Bi-Lin.Sexual Differences in Growth Characteristics of Statolith from Dosidicus Gigas in the High Sea Waters off Chile[J].Journal of Zhanjiang Ocean University,2012(3):55-63. | |
| Authors: | LU Hua-jie CHEN Xin-jun LIU Bi-Lin |
| Institution: | 1,2,3(1.College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;2.The Key Laboratory of Shanghai Education Commission for Oceanic Fisheries Resources Exploitation,Shanghai 201306,China;3.The Key Laboratory of Ministry of Education for Oceanic Fisheries Resources Sustainable Exploitation,Shanghai 201306,China) |
| Abstract: | The statolith samples of Dosidicus gigas were collected by Chinese squid fishing vessels in the high sea waters off Chile from January to June 2007 and Janurary to May 2008.The statolith morphological parameters of 503 individuals(348 for females and 155 for males) were measured,and the statolith growth characteristics were studied combined with the age data.The results showed that the total statolith length(TSL),statolith radius(SR),rostrum lateral dome length(RLL),wing length(WL) and the maximum width(MW) were considered as the feature parameters of squid statolith.The growth of main parameters of statolith between male and female individuals were significantly different.For female squid,the relationship between TSL and age was the best for the exponential function,SR-age and RLL-age followed the power function,MW-age and WL-age were described by the linear function.While for the male squid,the relationships of TSL-age,SR-age and RLL-age were described by the power function,MW-age and WL-age were linear function.For female squid,the relative growth rates of TSL,SR,MW,RLL and WL,and the absolute growth rate of SR and RLL increased with age firstly and then decreased.The absolute growth rates of TSL and MW increased with age,and the absolute growth rate of WL fluctuated with increase of age.While for the male squid,the relative growth rate of TSL and SR,and the absolute growth rates of MW,RLL and WL increased with age firstly and then decreased,the relative growth rates of MW,RLL and WL,and absolute growth rate of TSL and SR fluctuated with age.The results suggested that the statolith growth of Dosidicus gigas had the sexual differences and the growth rate of males was larger than that of males in general. |
| Keywords: | growth of statolith sexual difference growth rate Dosidicus gigas waters off Chile |
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