Literaturdatenbank
Literaturdatenbank |
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McGuire, J. M., Scribner, K. T., & Congdon, J. D. (2013). Spatial aspects of movements, mating patterns, and nest distributions influence gene flow among population subunits of blanding’s turtles (emydoidea blandingii). Conservation Genetics, (epub. ahead of print), 14 pp.
Added by: Admin (06 Jan 2014 18:24:59 UTC) |
| Resource type: Journal Article DOI: 10.1007/s10592-013-0493-8 BibTeX citation key: McGuire2013a View all bibliographic details  |
Categories: General Keywords: Emydidae, Emydoidea blandingii, Fortpflanzung - reproduction, Genetik - genetics, Habitat - habitat, Nordamerika - North America, Schildkröten - turtles + tortoises Creators: Congdon, McGuire, Scribner Collection: Conservation Genetics |
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| Abstract |
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The core habitats of semi-aquatic organisms are centered on wetlands, but also include terrestrial habitats. Patterns of movements among core area components can influence rates of genetic and demographic exchange among populations. A combination of 33 years of data on the life history and spatial biology of Blanding’s turtles (Emydoidea blandingii) on the E. S. George Reserve (ESGR) and 8 years of genetic data (N = 244 adults and 611 offspring) were used to document resident wetlands, identify mating pairs, and estimate cohort levels of coancestry and degree of spatial genetic structuring. For ESGR resident females, 34 % of clutches were sired by non-resident males, whereas 56 % of clutches of non-resident females that nested on the ESGR were sired by ESGR resident males. The mean number of mates for males and females was 1.6 (SD = 0.67) and 2.02 (SD = 1.05), respectively, and the annual occurrence of multiple paternity averaged 47.6 % (min–max = 15.4–55.6 %, N = 8). Repeat paternity was common (69.6 %), regardless of residence of parents. The probability of adults mating with individuals from different residence wetlands and tendencies for hatchlings to disperse to wetlands other than their mother’s residence contributed to demographic and genetic connectivity among residence wetlands. Similar allele frequencies among individuals from different residence wetlands (Fst = 0.002, P > 0.05) were consistent with the frequency and geographic extent of adult and juvenile movements. Data on mating patterns, individual movements, and core-habitat use helped identify mechanisms that influence genetic structuring within a population comprised of multiple sub-units.
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