title: Genetic Population Structure of Thunnus albacares in the Central Pacific Ocean Based on mtDNA COI Gene Sequences.
abstract: Thunnus albacares is an important fishery species throughout the world. Polymorphisms of sequence variations in mtDNA COI genes were assessed to explore the genetic differentiations among 11 populations of T. albacares sampled from the central Pacific Ocean. Sixty-one mtDNA haplotypes and 38 variable sites were detected. Analysis of mtDNA COI sequences revealed that tuna from the 11 localities were characterized by moderately high haplotype diversity (h = 0.650 ± 0.040), while sequence divergence between haplotypes was relatively low (π = 0.00364 ± 0.00044). Analyses of molecular variance and FST analysis supported that significant genetic differentiations existed between some of the sampled populations. Tests of neutral evolution and mismatch distribution analysis suggested that T. albacares might have experienced a population expansion, which possibly occurred within the last 0.82 million years. Our study unraveled the genetic structure of the extant population of T. albacares and addressed the related fishery management issues including fishery stock identification and management.
authors: Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New Harbor, Shanghai, 201306, People's Republic of China.
authors: Weiwen
authors: W
authors: Li
authors: Xinjun
authors: X
authors: Chen
authors: Qianghua
authors: Q
authors: Xu
authors: Jiangfeng
authors: J
authors: Zhu
authors: Xiaojie
authors: X
authors: Dai
authors: Liuxiong
authors: L
authors: Xu
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D003247:Conservation of Natural Resources; D004272:DNA, Mitochondrial / Q000235:genetics*; D003576:Electron Transport Complex IV / Q000235:genetics*; D005398:Fisheries; D014644:Genetic Variation; D005828:Genetics, Population; D006239:Haplotypes; D008969:Molecular Sequence Data; D010140:Pacific Ocean; D017422:Sequence Analysis, DNA; D014413:Tuna / Q000235:genetics*
chemical_list: D004272:DNA, Mitochondrial; D003576:Electron Transport Complex IV