Literaturdatenbank
Literaturdatenbank |
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Cox, W. A., Hazelrig, J. B., Turner, M. E., Angus, R. A., & Marion, K. R. (1991). A model for growth in the musk turtle, sternotherus minor, in a north florida spring. Copeia, 1991(4), 954–968.
Added by: Admin (24 Aug 2008 17:39:46 UTC) Last edited by: Beate Pfau (01 Aug 2009 08:48:09 UTC) |
| Resource type: Journal Article BibTeX citation key: Cox1991a View all bibliographic details  |
Categories: General Keywords: Habitat = habitat, Kinosternidae, Nordamerika = North America, Schildkröten = turtles + tortoises, Sternotherus, Sternotherus minor Creators: Angus, Cox, Hazelrig, Marion, Turner Collection: Copeia |
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| Abstract |
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Sternotherus minor Mark-release-recapture measurements were obtained for 120 growth intervals (56 females, 64 males) in a spring-dwelling population of Sternotherus minor in northwestern Florida. Calculation of relative instantaneous growth rates revealed considerable variation in individual growth, especially in smaller animals. Growth curves for straight midline carapace length (CL) and whole body mass (M) were derived separately for each sex by nonlinear least-squares fitting of these data to Gompertz and von Bertalanffy models. Data from concurrent studies on reproductive cycles were combined with growth results to yield the following estimates: the mean age and size at maturity in females is 8.0 yr and 80 mm CL (ranges = 5.6-10.1 yr; 70-85 mm CL), with 90% attaining maturity between 7.1 and 9.0 yr; males mature at a mean age of 5.6 yr and 55 mm CL (ranges = 4.4-9.25 yr; 50-70 mm CL), with 90% maturing in 4.6-6.6 yr. We suggest independent selection for age and size at maturity between sexes in S. minor, as has been proposed for other species of freshwater turtles. Added by: Admin Last edited by: Beate Pfau |