Literaturdatenbank
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Bailey, K. A., & Guyer, C. (1998). Demography and population status of the flattened musk turtle, sternotherus depressus, in the black warrior river basin of alabama. Chelonian Conservation and Biology, 3(1), 77–83.
Added by: Admin (17 Aug 2008 18:54:41 UTC) Last edited by: Beate Pfau (07 Nov 2009 07:13:34 UTC) |
| Resource type: Journal Article BibTeX citation key: Bailey1998a View all bibliographic details  |
Categories: General Keywords: Habitat = habitat, Kinosternidae, Nordamerika = North America, Schildkröten = turtles + tortoises, Sternotherus, Sternotherus depressus Creators: Bailey, Guyer Collection: Chelonian Conservation and Biology |
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| Abstract |
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The demography of the flattened musk turtle, Sternotherus depressus, was compared among sites differing in degree of human impact and among this and previous demographic studies. Sites designated as impacted due to increased sedimentation, algae, and turbidity had lower rates of turtle capture, adult-biased size distributions, and decreased parasitism by the leech Placobdella parasitica. Sex ratio, shell damage, and relative body mass did not differ significantly among sites. Comparison of demographic studies since 1981 revealed a consistent decline in rate of turtle capture at five of the six sites investigated, a consistent decline in ratio of males to females, and a decline in frequency of large individuals. These results indicate that population declines have continued, even at sites considered relatively pristine, as a result of insufficient recruitment and/or illegal collection. We recommend the continued protection and monitoring of S. depressus populations and water quality within the Black Warrior River Basin of Alabama.
Added by: Admin Last edited by: Beate Pfau |