Genetic Characteristics of Western North Pacific Sei Whales, Balaenoptera borealis, as Revealed by Microsatellites |
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Authors: | N Kanda M Goto L A Pastene |
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Institution: | (1) The Institute of Cetacean Research, 4-5, Toyomi-cho, Chuo-ku Tokyo, 104-0055, Japan |
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Abstract: | Genetic characteristics of sei whales, Balaenoptera borealis, inhabiting the western North Pacific were analyzed at 17 microsatellite loci in a total of 89 whales obtained from the area
between 37°N–45°N and 147°E–166°E in 2002 (N = 39) and 2003 (N = 50). All the loci analyzed were polymorphic over the samples, some of the loci had more than 10 alleles, indicating a high
level of genetic variation within samples. No significant deviation from the expected Hardy–Weinberg genotypic proportion
was observed at the 17 loci in the samples. No evidence of genetic heterogeneity in allele frequencies was observed between
sexes within samples as well as between the two temporally different samples, indicating a single population of sei whales
inhabiting the western North Pacific. We finally tested and demonstrated that the population appeared not to suffer from genetic
bottleneck as a result of population decline from past commercial whaling. |
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Keywords: | Bottleneck microsatellite population structure sei whale western North Pacific |
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