THE SAME GENE POOL IS SHARED BY 2 DISTINCT MORPHS OF THE FRESH-WATER SNAIL MELANOPSIS FROM THE SEA-OF-GALILEE

As a contribution to the taxonomy of the polymorphic snail Melanopsis in the Sea of Galilee, Israel, an electrophoretic survey based on 14 e nzymes (15 putative loci) was carried out on about 900 snails, belongi ng to 2 distinct morphs (banded and unbanded), sampled at 17 locations from around the lake. Hedrick's (1971) measure of genotypic identity was used to calculate the genetic distances among the groups. Accordin g to a UPGMA phenogram, all groups belong to the same gene pool, with the shortest distances characterizing morphs collected at the same loc ation.