The genetic population structure of lacustrine sockeye salmon, <Emphasis Type="Italic">Oncorhynchus nerka,</Emphasis> in Japan as the endangered species |
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Authors: | Yuichiro Kogura James E Seeb Noriko Azuma Hideaki Kudo Syuiti Abe Masahide Kaeriyama |
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Institution: | (1) Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1, Minato-cho, Hakodate Hokkaido, 041-8611, Japan;(2) School of Aquatic and Fisheries Science, University of Washington, 1122 Boat ST NE, Seattle, WA 98146, USA;(3) Nodai Bioresources Institute, Tokyo University of Agriculture, 196, Yasaka, Abashiri Hokkaido, 099-2493, Japan;(4) Faculty of Fisheries Sciences, Hokkaido University, 3-1-1, Minato-cho, Hakodate Hokkaido, 041-8611, Japan; |
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Abstract: | Lacustrine sockeye salmon (Oncorhynchus nerka) are listed as an endangered species in Japan despite little genetic information on their population structure. In order
to clarify the genetic diversity and structure of Japanese populations for evaluating on the bottleneck effect and an endangered
species, we analyzed the ND5 region of mitochondrial DNA (mtDNA) and 45 single nucleotide polymorphisms (SNPs) in 640 lacustrine sockeye salmon in Japan
and 80 anadromous sockeye salmon in Iliamna Lake of Alaska. The genetic diversity of the Japanese population in both mtDNA
and SNPs was significantly less than that of the Iliamna Lake population. Moreover, all Japanese populations had SNP loci
deviating from the HWE. In spite of low genetic diversity, the SNP analyses resulted that the Japanese population was significantly
divided into three groups. These suggest that Japanese sockeye salmon populations should be protected as an endangered species
and genetically disturbed by the hatchery program and transplantations. |
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