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

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 comm...

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Bibliographic Details
Published in:Fisheries science 2016-03, Vol.82 (2), p.251-256
Main Authors: Zhang, Chi, Ye, Zhenjiang, Li, Zengguang, Wan, Rong, Ren, Yiping, Dou, Shuozeng
Format: Article
Language:English
Subjects:
Accuracy
Animal reproduction
Biomedical and Life Sciences
Discriminant analysis
Fish
Fish & Wildlife Biology & Management
Fisheries
Fisheries management
Food Science
Freshwater & Marine Ecology
Genetic diversity
Laboratories
Life Sciences
Marine
Metapopulations
Migration
Original Article
Population
Population genetics
Population structure
Principal components analysis
Scomber
Scomberomorus niphonius
Software
Spawning
Spawning grounds
Statistical analysis
Studies
Variables
Wavelet transforms
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Summary: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.
ISSN:0919-9268
1444-2906
DOI:10.1007/s12562-016-0968-x