| 印度洋南部大眼金枪鱼年龄鉴定及其与生长的关系 |
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| 引用本文： | 周成,朱国平,陈锦淘,许柳雄.印度洋南部大眼金枪鱼年龄鉴定及其与生长的关系[J].中国水产科学,2012,19(3):536-544. |
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| 作者姓名： | 周成 朱国平 陈锦淘 许柳雄 |
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| 作者单位： | 1. 上海海洋大学海洋科学学院,上海,201306
2. 上海海洋大学海洋科学学院,上海201306;大洋渔业资源可持续开发省部共建教育部重点实验室,上海海洋大学,上海201306;上海市高校大洋生物资源开发和利用重点实验室,上海海洋大学海洋科学学院,上海201306 |
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| 基金项目： | 国家863计划项目，国家自然科学基金，上海市青年科技启明星计划项目，上海市重点学科建设项目，海洋渔业科学与技术浙江省重中之重学科开放课题 |
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| 摘 要： | 为了对大眼金枪鱼(Thunnus obesus)种群结构和年龄生长做出判断,从而进行有效的资源评估和管理,需要一种简便、可行、精确的年龄鉴定方法。根据2008年9月至2009年5月在印度洋中南部执行专项调查时采集的275枚第一背鳍鳍条样本,确立了最适的切割位置和年龄鉴定方法,并通过年龄鉴定估算大眼金枪鱼的von Berta-lanffy生长方程。研究结果表明,大眼金枪鱼的叉长范围为570～1 820 mm,优势叉长组为910～1 500 mm,占总体的83.9%;年龄组成以3、4和5龄居多;第1、2条年轮轮径的平均值分别为(4.23±0.71)mm和(5.72±0.48)mm。根据鳍条的切割位置分为3个组别,线性回归关系为拟合大眼金枪鱼鳍条半径与叉长关系的最佳回归方程,3个组别在鉴定大眼金枪鱼年龄时不存在显著差异(P>0.05),但赤井信息量标准(AIC)分析结果表明,自骨突处起,全长(L)的10%处为最佳切割位置。大眼金枪鱼von Bertalanffy生长方程为Lt=250.5×1 e 1.05(t+1.85)]。
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| 关 键 词： | 大眼金枪鱼 印度洋南部 鳍条 年龄鉴定 生长 |
| 修稿时间： | 2012/5/15 0:00:00 |
Relationship between age and growth of bigeye tuna (Thunnus obesus) in the southern Indian Ocean |
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| ZHOU Cheng,ZHU Guoping,CHEN Jintao,XU Liuxiong.Relationship between age and growth of bigeye tuna (Thunnus obesus) in the southern Indian Ocean[J].Journal of Fishery Sciences of China,2012,19(3):536-544. |
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| Authors: | ZHOU Cheng ZHU Guoping CHEN Jintao XU Liuxiong |
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| Institution: | 1,2,3 1.College of Marine Science,Shanghai Ocean University,Shanghai 201306,China; 2.The Key Laboratory of Oceanic Fisheries Resources Exploitation of Shanghai Education Commission,Shanghai Ocean University,Shanghai 201306,China; 3.The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China |
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| Abstract: | There is a need for a simple,practical,and accurate aging method to document the population structure,age,and growth of bigeye tuna(Thunnus obesus).We collected samples of the first dorsal spine of bigeye tuna that were collected in the Southern Indian Ocean between September 2008 and May 2009.We evaluated whether the location at which the spine was sectioned affected the estimation of age.The spine sections were divided into three groups based on the cutting position.There was a linear relationship between spine radius and fork length.There was no significant difference in estimated age between the three groups.However,AIC values suggested that the best cutting location was at 10% of the total length from the condyle base.The fork length of bigeye tuna ranged from 570mm to 1 820 mm.The majority of fish(83.9%) were between 910–1 500 mm in fork length(FL) and 3,4,and 5 years in age.The mean value and standard deviation of radius by rings 1 and 2 were(4.23 ± 0.71) mm and(5.72 ± 0.48) mm.The von Bertalanffy growth function was Lt=250.5×1-e-1.05(t+1.85)]. |
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| Keywords: | Thunnus obesus southern Indian Ocean spine age determination growth |
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