Fisheries Section Research Reports and Abstracts
Biochemical Genetics of Crappie in Georgia
Project number: F-42
To survey the biochemical variation of crappie in Georgia and determine if hybridization occurs between black and white crappie populations in Georgia.
Isozyme variation at 42 loci was examined for black crappie, Pomoxis nigromaculatus, populations in Clarks Hill Reservoir, upper and lower Walter F. George Reservoir, Lake Blackshear, Satilla River, Ogeechee River, Lake Sinclair, Lake Seminole, Lake Tobesofkee, Lake Nottely, Lake Lanier, Lake Allatoona and Carters Lake, and for white crappie, P. annularis, in Lake Blackshear. As has been found in other Southeastern black and white crappie populations, isozyme variation was minimal. All Southeastern populations of black crappie and white crappie examined, including Georgia crappie, are closely related. However, several unique rare alleles were detected in Georgia populations that have not been observed in populations. In 7 of 13 populations sampled, however, hybrid derived individuals were found indicating past hybridization and introgression of the black and white crappie genomes. Although black crappie populations in Georgia are closely related, they can be divided into management subsets based on presence or absence of rare alleles or white crappie alleles.
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