Abstract
Abstract We evaluated the genetic relationships among two captive populations of Colorado pikeminnow Ptychocheilus lucius from the Dexter National Fish Hatchery and Technology Center, New Mexico, and 15 samples of wild adult, juvenile, and age-0 fish from the Green, Yampa, Colorado, and San Juan rivers. The products of 89 or more loci were resolved by starch gel electrophoresis and histochemical staining; 8 loci were polymorphic in at least one sample. Minimally invasive sampling of fin and skeletal muscle tissue resulted in data from wild adults and juveniles (N = 207) and hatchery-produced adults (N = 60) with no mortality. Additionally, 426 wild and 34 hatchery-reared age-0 fish were sampled by necropsy. Allele frequencies did not differ significantly among geographically separated breeding populations, suggesting essential panmixia. Mean F ST values ranged from 0.003 among wild age-0 Green and Colorado River fish to 0.108 among all wild adult fish and captive broodfish. Significant deviations from Har...
Published Version
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