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Ferreira-Júnior, P. D., Treichel, R. L., Scaramussa, T. L., & Scalfoni, J. T. (2011). Morphometric pattern in caretta caretta (linnaeus, 1758)(cheloniidae) hatchlings from nests with different embryo development rates. Brazilian Journal of Biology, 71(1). 
Added by: Sarina Wunderlich (18 Nov 2012 17:43:24 UTC)
Resource type: Journal Article
DOI: http://dx.doi.org/10.1590/S1519-69842011000100022
BibTeX citation key: FerreiraJnior2011
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Categories: General
Keywords: Caretta, Caretta caretta, Cheloniidae, Schildkröten = turtles + tortoises, Zeitigung = incubation
Creators: Ferreira-Júnior, Scalfoni, Scaramussa, Treichel
Collection: Brazilian Journal of Biology
Views: 5/571
Views index: 14%
Popularity index: 3.5%
Abstract     
The geometric morphometric analysis of the shell of Caretta caretta hatchlings revealed that morphological variations may be related to incubation duration. Based on the overlapping of anatomical landmarks of the carapace and the plastron, it was possible to discriminate hatchlings from slow and fast developing clutches. Carapace and plastron of hatchlings from nests where incubation lasted less than 55 days are rounder as compared to the hatchlings from nests where incubation took 67 days. The differences observed in shell shape in terms of incubation duration were statistically significant, though carapace and plastron shape overlapping was observed in several individuals. Our results indicate that the incubation duration explains only a small part of the total variation in the shell shape as a whole. Yet, in spite of the low discriminant function coefficient, cross-validation tests indicated that 84.7% and 77.8% of the hatchlings were correctly categorised concerning the carapace and plastron, when the descriptive variable is incubation duration.
Added by: Sarina Wunderlich  
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