Population genetic structure and variability of Pacific herring Clupea pallasii in the stocking area along the Pacific coast of northern Japan |
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Authors: | Takuma Sugaya Michihiro Sato Emi Yokoyama Yuta Nemoto Tomonari Fujita Hiroyuki Okouchi Katsuyuki Hamasaki Shuichi Kitada |
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Affiliation: | Stock Enhancement Technology Development Center, National Research Institute of Aquaculture, Fisheries Research Agency, Oita 879-2602,;Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Minato, Tokyo 108-8477, and;Headquarters, Fisheries Research Agency, Yokohama, Kanagawa 220-6115, Japan |
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Abstract: | ABSTRACT: The genetic diversity of wild and hatchery-released Pacific herring Clupea pallasii collected from three brackish lakes and two bays in Honshu and Hokkaido, Japan was examined with five microsatellite loci. All loci showed high genetic variability with expected heterozygosities ranging from 0.815 to 0.945. Significant differences in genotypic and allelic distributions were detected among all locations except for between the two bays in Honshu Island. Pairwise population analysis based on the F ST values showed close genetic relationships among the locations in Hokkaido Island, and the hierarchical analyses of molecular variance showed significant genetic difference between the two islands. Those results suggest the existence of subpopulations due to natal homing. In addition, stocked fish showed as much genetic diversity as the wild fish. The pairwise population analyses also showed close relationships between the hatchery fish and the wild fish in respective stocking areas, showing that no effects of stocking programs on genetic diversity of wild populations were detected. |
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Keywords: | Clupeidae genetic diversity microsatellite migration Pacific herring stock enhancement |
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