GENETIC VARIATION IN SIX SPECIES OF SACOGLOSSAN OPISTHOBRANCHS
- 1 April 1991
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Molluscan Studies
- Vol. 57 (2) , 267-275
- https://doi.org/10.1093/mollus/57.2.267
Abstract
Genetic variation in allozymes of six species of Saco-glossa (Mollusca, Opisthobranchia) from Denmark was studied. Nine enzymes representing 11 loci gave reactions that could be used to calculate allele frequencies. Elysia viridis, Limapontia capitata, L. de-pressa, Ercolania nigra, Alderia modesta and Calliopaea oophaga all showed very great variation both within and between species. Levels of polymorphism varied between 0.5 and 0.8, and levels of observed heterozygosity were between 0.18 and 0.42. Interspecific identity of alleles in polymorphic loci was only found between the two species of Limapontia. Even in these two species genetic identity (I) was very low (0.07) for congeneric species. The results are discussed in relation to habitat, fertility, development type and geographic range of the species.Keywords
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