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RE-INTERPRETATION OF GENETIC VARIATION IN SIMOCEPHALUS (CLADOCERA, DAPHNIIDAE)
B. J. Hann 1 and P. D. N. Hebert 1
1 Biology Department, University of Windsor, Windsor, Ontario, Canada N9B 3P4
Populations of several co-existing species of Simocephalus were examined electrophoretically at 11 enzyme loci. The prevailing pattern was one of extensive allelic substitution between species and low levels of polymorphism (0-10%) within species. Genetic identity values between species were very low (10-50%). These results concur with those for other cyclic parthenogens, but are in sharp contrast to previous interpretation of data derived from populations of Simocephalus from the same sites.
Submitted on March 18, 1982Accepted on May 14, 1982