Genetic Variation among Local Populations of the Japanese Mitten Crab <i>Eriocheir japonica</i> De Haan

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  • Genetic Variation among Local Populations of the Japanese Mitten Crab Eriocheir japonica De Haan
  • Genetic Variation among Local Populatio

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Abstract

Horizontal starch gel electrophoresis was used to investigate the genetic stock structure of the Japanese mitten crab Eriocheir japonica. Twenty-two putative enzyme-coding loci were examined from 1072 crabs at 22 localities from Hokkaido to Okinawa in Japan and 69 Chinese mitten crabs E. sinensis. Nine loci (40.9%) were polymorphic, i.e., AAT-1*, AAT-2*, G3PDH*, GPI*, IDHP-1*, IDHP-2*, MDH-1*, MDH-2* and PGDN*. A geographical cline of allelic frequencies was not clearly recognized at all the loci but the alleles *b and *e at the GPI* locus might be a diagnostic character of the Okinawa populations. The average proportion of polymorphic loci and heterozygosity were 0.149 and 0.020, respectively. Nei's genetic distance was 0.0004 (0-0.0013) which was about 1/140 of the Nei's genetic distance between the Japanese mitten crab and the Chinese mitten crab. Gene diversity analysis indicated that only 1.20% of the variation was between samples. These results indicate that the genetic differentiation of the local populations is small.

Journal

  • Fisheries science

    Fisheries science 64 (2), 198-205, 1998

    The Japanese Society of Fisheries Science

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