Stock structure of Japanese flounder inferred from morphological and genetic analyses |
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Authors: | Yuya Shigenobu Ken -Ichi Hayashizaki Takashi Asahida Hitoshi Ida Kenji Saitoh |
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Institution: | Tohoku National Fisheries Research Institute, Shinhama, Shiogama, Miyagi 985-0001,; School of Fisheries Science, Kitasato University, Sanriku, Ofunato, Iwate 022-0101, and; PREC Institute Inc., Kouji-machi, Chiyoda-ku, Tokyo 102-0083, Japan |
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Abstract: | ABSTRACT: Stock structure of Japanese flounder Paralichthys olivaceus has been inferred mainly from either morphological or genetic analyses. However, because the results of both analyses did not always agree with each other, an inclusive conclusion has never been obtained. In this study, the stock structure has been inferred from both morphological and genetic analyses using 722 wild Japanese flounder collected from nine locations along the Japanese coast. The dorsal and anal fin ray counts were larger in the southern than in the northern populations. In total, 1041 bp of mitochondrial NADH dehydrogenase subunit-2 ( ND2 ) and 1830 bp of ND5 sequences were aligned. There are 578 variable sites in the concatenated sequence from the two genes, which defined a total of 490 haplotypes. Both results of morphological and genetic analyses indicated that the western Kyushu group, which included the Nagasaki and Kagoshima populations, was divided from the other seven populations. This is the first report to reveal the heterogeneity of the western Kyushu group based on statistical analysis. |
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Keywords: | AIC amova dorsal and anal fin rays mitochondrial DNA Paralichthys olivaceus |
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