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Population genetic structure of skipjack tuna Katsuwonus pelamis from the Indian coast using sequence analysis of the mitochondrial DNA D‐loop region
Author(s) -
Menezes M. R.,
Kumar G.,
Kunal S. P.
Publication year - 2012
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2012.03270.x
Subject(s) - panmixia , biology , d loop , analysis of molecular variance , mitochondrial dna , skipjack tuna , phylogeography , population , genetic variation , genetic structure , nucleotide diversity , genetic distance , phylogenetic tree , fishery , zoology , haplotype , tuna , genetics , genotype , gene , demography , sociology , fish <actinopterygii>
Genetic structure of skipjack tuna Katsuwonus pelamis from the Indian region was investigated using sequence data of mitochondrial DNA (mtDNA) D‐loop region. A total of 315 individuals were sampled from six major fishing grounds around the east and west coasts of India including the Andaman (Port Blair) and Lakshadweep (Minicoy) Islands. Nucleotide and gene diversities were high in all the sample collections. Significant genetic heterogeneity was observed for the mtDNA sequence data among sites ( φ ST = 0·0273, P < 0·001). Analysis of molecular variance (AMOVA) showed significant genetic variation among four groups ( φ CT = 0·0261, P < 0·05) which was also supported by spatial AMOVA results. The null hypothesis of single panmictic population of K. pelamis along the Indian coast can thus be rejected. Phylogenetic analysis of the mtDNA sequence data showed the presence of four clades of K. pelamis in the Indian waters. There was no clear pattern, however, of haplotypes and geographic location among samples. The results of this study suggest the occurrence of four genetically differentiated groups of K. pelamis across the coastal waters of India.