サワガニの地方種族判別〔英文〕

概要

論文の詳細を見る
A total of 299 specimens of the freshwater crab Geothelphusa dehaani, sampled from seven localities of Honshu and Shikoku, Japan, was examined in order to identify intraspecific local populations by the use of some indicators such as allele frequencies of isozymes, body color variations, amount of hairs, and external morphometric traits.As the results, it became clear that this crab is composed of different local populations genetically isolated from each other. Differences in body color, amount of hairs and relative growth of several parts of the body made it possible to group these populations into two categories: one group with bluish coloration from Chiba and Kanagawa and another with brownish coloration from Iwate, Shizuoka, Osaka, and Kochi.Homozygote excess at isozyme locus, commonly observed throughout different populations, strongly suggests that this species is inbreeding under natural conditions.
日本水産學會の論文