Literaturdatenbank
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Hammer, D. A. (1969). Parameters of a marsh snapping turtle population lacreek refuge, south dakota. Journal of Wildlife Management, 33(4), 995–1005.
Added by: Sarina Wunderlich (25 Jun 2011 12:41:35 UTC) |
| Resource type: Journal Article BibTeX citation key: Hammer1969 View all bibliographic details  |
Categories: General Keywords: Chelydra, Chelydra serpentina, Chelydridae, Fortpflanzung = reproduction, Fressfeinde = predators, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises Creators: Hammer Collection: Journal of Wildlife Management |
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| Abstract |
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Recapture of snapping turtles (Chelydra serpentina), marked by attaching metal tags to a marginal shield, showed that movement occurred primarily within a single marsh unit. Mean distance moved between recaptures was 0.57 miles. Capture-recapture methods yielded an estimate of 2,415 adults or 1 per 2 acres. Predators destroyed 59 percent of the turtle nests. Hatchling emergence was less than 20 percent in undisturbed nests. Immigration contributed more to population maintenance and growth than did reproduction on the Refuge. Annuli in bony structures may be useful to age turtles. Data from recaptures, captives, and annuli evaluations suggested individual growth follows a sigmoid curve. Turtle-nesting areas on Lacreek Refuge are restricted and highly vulnerable to mink ( Mustela vison ), striped skunks, spotted skunks (Spilogale putorius)
Added by: Sarina Wunderlich |