| Age and Growth of Chub Mackerel （Scomberjaponicus） in the East China and Yellow Seas Using Sectioned Otolith Samples |
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| 基金项目： | 教育部跨世纪优秀人才培养计划，上海市重点学科建设项目 |
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| 摘 要： |
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| 关 键 词： | 耳石 白鲑 海洋生物 东海 黄海 中国 |
Age and Growth of Chub Mackerel (Scomber japonicus) in the East China and Yellow Seas Using Sectioned Otolith Samples |
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| Authors: | LI Gang CHEN Xinjun FENG Bo |
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| Institution: | 1. College of Marine Sciences, Shanghai Ocean University, Shanghai 200090, P R. China;The Key Laboratory of Shanghai Education Commission for Oceanic Fisheries Resources Exploitation,Shanghai 200090, P. R. China
2. College of Marine Sciences, Shanghai Ocean University, Shanghai 200090, P R. China;College of Fisheries, Guangdong Ocean University, Zhanjiang 524006, P R. China |
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| Abstract: | Although chub mackerel (Scomberjaponicus) is a primary pelagic fish species,we have only limited knowledge on itskey life history processes.The present work studied the age and growth of chub mackerel in the East China and Yellow Seas.Agewas determined by interpreting and counting growth rings on the sagitta otoliths of 252 adult fish caught by the Chinese commercialpurse seine fleet during the period from November 2006 to January 2007 and 150 juveniles from bottom trawl surveys on the spawn-ing ground in May 2006.The difference between the assumed birth date of 1 st April and date of capture was used to adjust the agedetermined from counting the number of complete translucent rings.The parameters of three commonly used growth models,the vonBertalanffy,Logistic and Gompertz models,were estimated using the maximum likelihood method.Based on the Akaike InformationCriterion (AIC),the von Bertalanffy growth model was found to be the most appropriate model.The size-at-age and size-at-maturityvalues were also found to decrease greatly compared with the results achieved in the 1950s,which was caused by heavy exploitationover the last few decades. |
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| Keywords: | Scomber japonicus age growth otolith East China and Yellow Seas |
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