Literaturdatenbank
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Congdon, J. D., & van Loben Sels, R. C. (1991). Growth and body size in blanding's turtles (emydoidea blandingi): relationship to reproduction. Canadian Journal of Zoology, 69(1), 239–245.
Added by: Admin (23 Aug 2008 19:57:55 UTC) Last edited by: Beate Pfau (07 Feb 2009 06:52:47 UTC) |
| Resource type: Journal Article BibTeX citation key: Congdon1991a View all bibliographic details  |
Categories: General Keywords: Emydidae, Emydoidea, Emydoidea blandingii, Fortpflanzung = reproduction, Habitat = habitat, Morphologie = morphology, Nordamerika = North America, Schildkröten = turtles + tortoises Creators: Congdon, van Loben Sels Collection: Canadian Journal of Zoology |
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| Abstract |
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Emydoidea blandingii Abstract: Growth and reproduction in Blanding's turtles (Emydoidea blandingi) were studied in southeastern Michigan from 1975 through 1988. Average body sizes of both sexes of adults were similar; however, shapes of males were different from those of females. The average size of a group of females with a mean minimum age of 47 years was not significantly different from a younger group with a mean age of 21 years. Clutch size ranged from 3 to 19 (, N = 280) eggs over 11 years. Clutch wet mass ranged from 60.4 to 183.4 g (, N = 17), and relative clutch mass of nine females averaged 0.12. Clutch size, and to a lesser degree egg size, showed a significant positive relationship with body size, but not with age of females. Hatchlings averaged 31.0 mm in plastron length, 35.3 mm in carapace length, and 9.2 g in body wet mass. Differences in juvenile growth rates and age at sexual maturity appear to be the major cause of variation in body size of adult Blanding's turtles and the related reproductive output per clutch. Added by: Admin Last edited by: Beate Pfau |