Literaturdatenbank
Literaturdatenbank |
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Klut, G. M. (2011). Genetic homogeneity among blanding's turtle (emydoidea blandingii) populations across the chicago area. Unpublished thesis , Western Illinois University.
Added by: Sarina Wunderlich (28 Aug 2011 21:15:13 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: Klut2011 View all bibliographic details  |
Categories: General Keywords: Emydidae, Emydoidea, Emydoidea blandingii, Genetik = genetics, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises Creators: Klut Publisher: Western Illinois University |
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| Abstract |
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This study assessed the genetic structure of Blanding's turtle (Emydoidea blandingii ) populations across the Chicago metropolitan area. Field work occurred at one or more sites within DuPage, Kane, Will and Cook County. One hundred individuals were genotyped at seven polymorphic loci. A priori analysis showed all groups deviated significantly from Hardy-Weinberg expectations (homozygote excess), at one marker, suggesting null alleles. Subsequent evaluations, therefore, excluded that locus. Geographic samples showed high levels of heterozygosity and allelic diversity, and private and/or rare alleles. Pairwise Fst values were non-significant for all comparisons. Similarly, Bayesian clustering models found either baseline or no subdivision. Results indicate that despite being small and patchy, resident populations still represent a genetically viable and homogenous assemblage. At present, urbanization interrupts or completely precludes dispersal among regions, but data imply connectivity. Historical gene flow, exaggerated by the generation time of this species, and their presumably slow microevolutionary rates, seemingly ameliorated structuring at this scale. These findings are relevant to management efforts, such as head-starting and translocation, and warrant more investigation.
Added by: Sarina Wunderlich |