Literaturdatenbank
Literaturdatenbank |
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Browne, C. L. (2003). The status of turtle populations in point pelee national park. Unpublished thesis , Lakehead University, Thunder Bay, Ontario.
Added by: Admin (29 Jan 2012 12:38:36 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: Browne2003 View all bibliographic details  |
Categories: General Keywords: Chelydra, Chelydra serpentina, Chelydridae, Chrysemys, Chrysemys picta, Clemmys, Clemmys guttata, Emydidae, Emydoidea, Emydoidea blandingii, Fortpflanzung = reproduction, Fressfeinde = predators, Glyptemys, Glyptemys insculpta, Graptemys, Graptemys geographica, Habitat = habitat, invasive Arten = invasive species, Kinosternidae, Nordamerika = North America, Schildkröten = turtles + tortoises, Sternotherus, Sternotherus odoratus, Terrapene, Terrapene carolina, Toxikologie = toxicology, Trachemys, Trachemys scripta, Zeitigung = incubation Creators: Browne Publisher: Lakehead University (Thunder Bay, Ontario) |
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| Abstract |
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Point Pelee National Park was historically the location of greatest turtle diversity in Canada. My objectives were to determine species present, their population sizes and structure, and to examine possible causes of decline. I used mark-recapture to determine the population sizes and population structure of turtle species present. Captured turtles were marked, measured, sexed, and released at the site of capture. I compared my data to 1972 data on turtles at Point Pelee. I searched for turtle nests during the nesting season (late May to early July) in 2001 and 2002. Nests were randomly assigned to either a predation or a contaminant study. I monitored nests in the predation study to compare predation rates among species and areas. Predator surveys were also conducted along roadsides. Nests in the contaminant study were protected from mammalian predation to examine hatching success and three eggs per nest were collected for contaminant analysis. Nests of turtles designated as 'species at risk' were protected but not included in the predation or contaminant study. Turtles killed by vehicles were recorded and models were created to predict the potential effects of road mortality and nest predation on turtle populations. Chrysemys picta Graptemys geographica Emydoidea blandingii Clemmys guttata Glyptemys insculpta Sternotherus odoratus Chelydra serpentina Trionychidae Apalone Spinifera Terrapene carolina Trachemys scripta
Added by: Admin |