Literaturdatenbank
Literaturdatenbank |
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Tucker, J. K., & Warner, D. A. (1999). Microgeographic variation in response of red-eared slider (trachemys scripta elegans) embryos to similar incubation environments. Journal of Herpetology, 33(4), 549–557.
Added by: Admin (14 Aug 2008 20:40:53 UTC) |
| Resource type: Journal Article BibTeX citation key: Tucker1999a View all bibliographic details  |
Categories: General Keywords: Emydidae, Habitat = habitat, Pseudemys, Schildkröten = turtles + tortoises, Trachemys, Trachemys scripta, Zeitigung = incubation Creators: Tucker, Warner Collection: Journal of Herpetology |
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| Abstract |
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Pseudemys scripta We examined site-specific variation in the response of red-eared slider (Trachemys scripta elegans) embryos exposed to similar incubation environments, and collected at five nearby sites in west-central Illinois. Overall, site was not a significant source of variance in change in egg mass during incubation, in hatchling wet mass, and in hatchling carapace length. However, site was a significant source of variance in incubation period. Nonetheless, significant site-specific differences in each trait were detected in pairwise comparisons. The actual difference between extremes was small. Eggs from the site with the longest incubation period also gained the most water during incubation. Our study has important implications for future studies of geographic variation in the physiological response of embryos to incubation environments. Comparisons between eggs and embryos from geographically distant sites would benefit by inclusion of as many clutches as possible. Larger numbers of clutches reduce the possibility that any differences between geographically distant regions are due to maternal differences rather than region-specific differences. Studies comparing embryonic responses from geographically distant regions would be strengthened by including turtles from as many local collecting sites for each region as possible. Sampling a single site per region may be inadequate because any geographic variation in embryonic response could just as well be due to undetected local site-specific differences.
Added by: Admin |