A Preliminary Study of Using Some Nest Characteristics as Indicators for the Size of Green Turtle (Chelonia mydas) Hatchlings
Journal Title: Cumhuriyet Science journal - Year 2017, Vol 38, Issue 4
Abstract
Body size can increase or decrease the chances of survival of sea turtle hatchlings. Given the importance of body size for hatchling survival, it would be useful method for conservationists to be able to estimate, using indicators, hatchling size quickly without having to disturb hatchlings. Some nest characteristics such as clutch size, distance of the nest from the sea, incubation period and nest depth were tested for correlations with hatchling size in a population of Chelonia mydas in Turkey to determine if they can be indicators for hatchling size. Our results showed that none of these nest characteristics were suitable. However; incubation period showed weakly correlated with straight carapace size.When the best fitting linear model of the effect of principal components (PCs), derived from collinear nest characteristics, on hatchling size was constructed, the model only explained 19.75 % of the variance in hatchling size. PC2 had a significant effect on straight carapace length (SCL) and the interaction between PC1 and PC2 had significant effects on SCL and curved carapace length (CCL) in the univariate analysis. F-test results that suggested the models had not significant predictive capabilities. Perhaps there may be other factors that are more suitable as indicators, or that hatchling size is influenced by a complex interplay among several factors, such that it is not possible to identify a few key factors to be used as indicators.
Authors and Affiliations
Bektaş SÖNMEZ, Şükran YALÇIN ÖZDILEK
Keywords
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- EP ID EP488320
- DOI 10.17776/csj.363298
- Views 62
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