Departmental Reports


Title:

Biochemical Genetics of Crappie in Georgia



Author(s):

Dunham, R., J. DiBona, I. Rachmatika, K. Norgren and A. Emory



Date: 1995



Funding Agency: Georgia Federal Aid in Sport Fish Restoration Act, Dingell-Johnson Project F-42



Keywords: crappie, pomoxis, genetics, isozyme, georgia



Category: Domestic Funded Research Report



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Summary/Recommendations/Objectives:

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 other states. No F

 

1 hybrids between black and


white crappie were found in any 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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