Gene flow and genetic characterization of Northern Goshawks breeding in Utah

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Adult movement and natal dispersal data demonstrate that Northern Goshawks (Accipiter gentilis) are able to travel over long distances, suggesting a large functional population. However, these data are unable to determine whether these movements contribute to gene flow among adjacent breeding areas. We used eight microsatellite DNA loci and mitochondrial DNA control-region sequence data to assess population structure of Northern Goshawks breeding in Utah. Goshawks had moderate levels of genetic variation at microsatellite loci (observed heterozygosity = 50%), similar to levels found in other medium-sized, highly mobile birds. Overall estimates of interpopulation variance in microsatellite alleles (FST = 0.011) and mtDNA haplotypes (ΦST = 0.126) were low and not significantly different from zero. Pairwise population comparisons using microsatellite markers revealed no differentiation among sampled sites, indicating that the functional population extends beyond Utah. However, pairwise population analyses of mtDNA uncovered a single case of differentiation between goshawks inhabiting Ashley National Forest, in northeastern Utah, and Dixie National Forest, in southwestern Utah. Low levels of population structuring observed in mtDNA between the two forests may be due to the smaller effective population size sampled by mtDNA, a cline of haplotypes across the West, or the presence of a contact zone between A. g. atricapillus and goshawks of southern Arizona and the Mexican Plateau.

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Publication type Article
Publication Subtype Journal Article
Title Gene flow and genetic characterization of Northern Goshawks breeding in Utah
Series title Condor
DOI 10.1650/7448
Volume 106
Issue 4
Year Published 2004
Language English
Publisher Oxford Academic
Contributing office(s) Nebraska Cooperative Fish and Wildlife Research Unit
Description 11 p.
First page 826
Last page 836
Country United States
State Utah
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