Literaturdatenbank
Literaturdatenbank |
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Rubin, C. S., Warner, R. E., Ludwig, D. R., & Thiel, R. (2004). Survival and population structure of blanding’s turtles (emydoidea blandingii) in two suburban chicago forest preserves. Natural Areas Journal, 24(1), 44–48.
Added by: Admin (15 Mar 2009 13:31:40 UTC) Last edited by: Admin (15 Mar 2009 13:48:21 UTC) |
| Resource type: Journal Article BibTeX citation key: Rubin2004 View all bibliographic details  |
Categories: General Keywords: Emydidae, Emydoidea, Emydoidea blandingii, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises Creators: Ludwig, Rubin, Thiel, Warner Collection: Natural Areas Journal |
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| Abstract |
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We investigated the survival and population structure of Blanding’s turtles (Emydoidea blandingii Holbrook) in two local forest preserves in suburban Chicago using radio telemetry and mark-recapture from 1994-1998. Our objective was to assess the status of this state threatened species through direct comparisons of a population in rural central Wisconsin and by making comparisons of these populations to others using relevant literature. Five years of mark-recapture data revealed that the suburban Chicago populations were small, estimated at 36 and 25 turtles. Furthermore, population structures based on carapace lengths were significantly skewed toward adults in suburban Chicago, with only two hatchlings found. It was evident that juvenile turtles were lacking in suburban Chicago, implying low juvenile recruitment when compared to the central Wisconsin population and to relevant literature. Although annual survival of adults was high (range 0.933-1.00), population size estimates were so small that Blanding's turtles in suburban Chicago are at risk of extinction in the coming decades. Results suggest that management interventions that focus on maintaining high adult survival and increasing juvenile recruitment will likely be the most beneficial to the persistence of Blanding’s turtles in suburban Chicago. Future studies are needed to assess what factors limit juvenile recruitment in suburban Chicago.
Added by: Admin Last edited by: Admin |