Literaturdatenbank
Literaturdatenbank |
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Tucker, J. K. (2000). Annual variation in hatchling size in the red-eared slider turtle (trachemys scripta elegans). Herpetologica, 56(1), 8–13.
Added by: Admin (14 Aug 2008 22:46:57 UTC) |
| Resource type: Journal Article BibTeX citation key: Tucker2000 View all bibliographic details  |
Categories: General Keywords: Emydidae, Fortpflanzung = reproduction, Habitat = habitat, Nordamerika = North America, Pseudemys, Schildkröten = turtles + tortoises, Trachemys, Trachemys scripta, Zeitigung = incubation Creators: Tucker Collection: Herpetologica |
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| Abstract |
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Pseudemys My research examined variation in hatchling size over three years (1995-1997) in the red-eared slider turtle (Trachemys scripta elegans) at a nesting site in Jersey County, Illinois. The number and sizes of natural hatchlings varied among years. Hatchlings collected in 1996 from eggs laid in 1995 were larger in both mass and carapace length than those collected in 1995 or 1997 from eggs laid in 1994 and 1996, respectively. I suggest that increased rainfall of nearly three-times normal during May 1995 was one possible cause for the larger size of hatchlings collected in 1996. Variation in resource availability may also have contributed to the variation in hatchling size. Egg size adjusted for maternal body size was largest in 1995, and these eggs produced the largest hatchlings. Only experimental or long-term studies can elucidate the sources and biological significance of variation in hatchling size. Factors such as climatic changes that affect moisture levels during incubation could have biologically relevant effects on hatchling size among species of turtles that lay flexible-shelled eggs
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