Pivotal temperature for loggerhead turtles (Caretta caretta) from Kyparissia Bay, Greece
- 1 December 2002
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Zoology
- Vol. 80 (12), 2118-2124
- https://doi.org/10.1139/z02-204
Abstract
Pivotal temperature (the constant temperature giving 50% of each sex) for two clutches of loggerhead sea turtles (Caretta caretta) from Kyparissia Bay, Greece, was 29.3°C. Pivotal incubation duration (the time from laying to hatching giving 50% of each sex) was 52.6 days. These values are close to those obtained for this species in Brazil and the United States, providing further evidence that these characteristics are relatively conservative in different populations. Methodological differences between different experiments and limitations on accuracy of equipment make the detection of small differences problematic. Comparison of incubation durations in the field with the pivotal durations obtained here suggest that hatchling sex ratio on some Mediterranean beaches is female biased but probably varies considerably within this region.Keywords
This publication has 22 references indexed in Scilit:
- Estimating hatchling sex ratios of loggerhead turtles in Cyprus from incubation durationMarine Ecology Progress Series, 2001
- Facultative sex allocation in snow skink lizards (Niveoscincus microlepidotus)Journal of Evolutionary Biology, 2001
- Pivotal temperature and predicted sex ratios for hatchling hawksbill turtles from BrazilCanadian Journal of Zoology, 1999
- Male‐producing thermal ecology of a southern loggerhead turtle nesting beach in Brazil: implications for conservationAnimal Conservation, 1999
- Predicted female bias in sex ratios of hatchling loggerhead sea turtles from a Florida nesting beachCanadian Journal of Zoology, 1998
- Hatchling sex in the marine turtle Caretta caretta is determined by proportion of development at a temperature, not daily duration of exposureJournal of Experimental Zoology, 1994
- Sex ratios of sea turtlesJournal of Experimental Zoology, 1994
- Pivotal and beach temperatures for hawksbill turtles nesting in AntiguaCanadian Journal of Zoology, 1992
- Sex ratio of hatchling loggerhead sea turtles: data and estimates from a 5-year studyCanadian Journal of Zoology, 1992
- Critical periods and pivotal temperatures for sexual differentiation in loggerhead sea turtlesCanadian Journal of Zoology, 1982