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Genetic variation between populations of starspotted dogfish Mustelus manazo in central Japan and northern Taiwan

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The genetic structure of the samples of Mustelus manazo between central Japan and Taiwan was investigated by starch gel electrophoresis. From a total of 20 enzyme loci scored, only two of them (CK-A and sSOD-1) showed polymorphism with sufficient allelic variation that would be useful for analysis of population structure. The Taiwanese samples have unique allele of CK-A 52 and sSOD-1 40 that are absent in the Japanese samples. Mean heterozygosity values were 0.027 and 0.055 for two Taiwanese samples and 0.008 and 0.013 for two Japanese samples. The chi-square analysis shows significant differences (P < 0.001) between the pooled central Japanese samples and Taiwanese samples indicating that they are two separate populations with moderate divergence (FST = 0.063). A possible explanation of population divergence between the two countries is also discussed.
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Keywords: Mustelus manazo; Taiwan; allozyme; central Japan; geographic variation

Document Type: Research Article

Affiliations: Department of Fisheries Sciences, Taiwan Ocean University, Keelung, Taiwan 200, ROC

Publication date: 01 February 2001

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