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Allozymic Variation and Occurrence of Multiple Inseminations in Populations of the Salamander Desmognathus ochrophaeus
Stephen G. Tilley and Jill S. Hausman
Vol. 1976, No. 4 (Dec. 30, 1976), pp. 734-741
Stable URL: http://www.jstor.org/stable/1443456
Page Count: 8
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Genetic variation at esterase and lactate dehydrogenase loci was studied in seven populations of Desmognathus ochrophaeus in western North Carolina, and genotypic comparisons of females and their offspring were employed to detect multiple inseminations. Polymorphisms involving several alleles were found in both enzyme systems, and female-offspring comparisons validated assumptions of simple Mendelian inheritance. Of 100 broods examined, 8 contained more than two unambiguously paternal alleles at either the Esterase-2 or Lactate dehydrogenase-2 locus and therefore must have resulted from insemination of the female by more than one male. Actual frequencies of multiple inseminations are conservatively estimated to be approximately 7%, but estimates varied widely among the individual populations sampled.