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Population genetics of marine Pelecypods. 2. Genetic differences in microhabitats of Modiolus demissus
Koehn, R.K.; Turano, F.J.; Mitton, J.B. (1973). Population genetics of marine Pelecypods. 2. Genetic differences in microhabitats of Modiolus demissus. Evolution 27(1): 100-105
In: Evolution. Society for the Study of Evolution: Lancaster. ISSN 0014-3820, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Koehn, R.K.
  • Turano, F.J.
  • Mitton, J.B.

Abstract
    Samples of the sedentary Modiolusdemissus from 0.66m vertically separate areas within the intertidal zone, differ significantly in the proportion of heterozygotes at the Tetrazolium Oxidase locus. Smallest animals exhibited a heterozygote deficiency, with heterozygosity increasing significantly with age. The observed genetic differences can be due to active site-selection of larvae, or more probably differential survival of heterozygotes. Genetic differences observed between microhabitats within the tidal zone do not occur in a pattern that allows speculation concerning the maintenance of polymorphism in populations dispersed in multiple niches.

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