Population structure of Japanese Spanish mackerel Scomberomorus niphonius in the Bohai Sea, the Yellow Sea and the East China Sea: evidence from random forests based on otolith features

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• 作者：Chi Zhang ; Zhenjiang Ye ; Zengguang Li ; Rong Wan ; Yiping Ren…
• 关键词：Scomberomorus niphonius ; Otolith features ; Random forests ; Population structure
• 刊名：Fisheries Science
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：82
• 期：2
• 页码：251-256
• 全文大小：641 KB
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• 作者单位：Chi Zhang (1)
  Zhenjiang Ye (1)
  Zengguang Li (1)
  Rong Wan (1)
  Yiping Ren (1)
  Shuozeng Dou (2)
  
  1. College of Fisheries, Ocean University of China, Qingdao, 266003, China
  2. Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
  
• 刊物主题：Fish & Wildlife Biology & Management; Freshwater & Marine Ecology; Food Science;
• 出版者：Springer Japan
• ISSN：1444-2906

文摘

In this study, the population structure of Japanese Spanish mackerel Scomberomorus niphonius were investigated based on the geographical variation of otolith features, and the concept of random forests was introduced as a classifier. Samples were collected from eight main spawning grounds using commercial gill nets, covering the distribution range along the coast of China. Otolith shape was described by the shape variables and principle components of Fourier coefficients. Every possible combination of otolith variable was tested to search for an optimal variable combination. An intermediate number of variables (8 out of 13) produced the most discriminating signal, and then the eight grounds were divided into three stocks with 64.5 % global accuracy. The discriminant result provided phenotypic evidence for the common migration trajectory, and further confirmed the existence of a metapopulation in Japanese Spanish mackerel at a larger scale.