Literaturdatenbank
Literaturdatenbank |
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Lefebvre, J., Avery, T. S., & Herman, T. B. (2011). Size dimorphism and growth rates in distinct populations of blanding's turtles (emydoidea blandingii) in nova scotia in relation to environment. Herpetological Conservation and Biology, 6(3), 465–472.
Added by: Sarina Wunderlich (18 Nov 2012 17:43:41 UTC) |
| Resource type: Journal Article BibTeX citation key: Lefebvre2011 View all bibliographic details  |
Categories: General Keywords: Emydidae, Emydoidea, Emydoidea blandingii, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises Creators: Avery, Herman, Lefebvre Collection: Herpetological Conservation and Biology |
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| Abstract |
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Emydoidea blandingii Sexual size dimorphism is common in turtles, with greater size in most species favoring females. However, in Blanding’s Turtles, which are among the longest-lived freshwater turtles for which field data are available, males are slightly larger. Nova Scotia’s three known populations are disjunct from those in the species main range in south central Canada and north central United States and occupy different habitats that may exert different environmental pressures on the turtles. We compared body size and sexual size dimorphism across four distinct populations to identify any patterns that might reflect divergent environments. Sexual size dimorphism was consistently male biased in all populations, but differed significantly in degree across populations, suggesting that the environment exhibits a significant effect on size and growth rate. Indeterminate growth was evident in both sexes pooled across populations. The growth rate of adult males exceeds that of adult females, and juvenile growth rate exceeds that of adults regardless of population.
Added by: Sarina Wunderlich |