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La diversidad genética de poblaciones de trucha de arroyo nativas, sembradas e híbridas en el sur de las Montañas Apalaches
Author(s) -
Hayes John P.,
Guffey Stanley Z.,
Kriegler Frank J.,
McCracken Gary F.,
Parker Charles R.
Publication year - 1996
Publication title -
conservation biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.2
H-Index - 222
eISSN - 1523-1739
pISSN - 0888-8892
DOI - 10.1046/j.1523-1739.1996.10051403.x
Subject(s) - trout , diversity (politics) , geography , stocking , fishery , genetic diversity , ecology , biology , forestry , fish <actinopterygii> , population , demography , sociology , anthropology
Using mitochondrial DNA (mtDNA) restriction analysis and starch‐gel electrophoresis of the CK‐A2 locus product, we examined genetic variation in 311 brook trout (Salvelinus fontinalis) from 11 native, 5 hatchery‐derived, and 8 hybrid populations in the southern Appalachian Mountains. Native southern Appalachian fish were genetically distinct from hatchery‐derived fish. Southern and hatchery‐derived fish were reliably distinguished based on three mtDNA restriction sites. Native southern haplotypes differed from hatchery‐derived haplotypes by an average of 0.84%. Northern hatchery‐derived haplotypes varied little in mtDNA compared to native southern haplotypes. Introgression of mtDNA haplotypes and the CK‐A2 locus varied among populations, and introgression of allozyme and mtDNA markers was positively correlated. Continued introductions of nonnative strains of brook trout in the southern Appalachians could simplify the genetic structure of native brook trout populations and eliminate unique genotypes.