hays-temperature-2002.pdf (189.08 kB)
Temperature-dependent sex determination of Ascension Island green turtles
journal contribution
posted on 2002-01-01, 00:00 authored by B Godley, A Broderick, F Glen, Graeme HaysGraeme HaysWe examined the role played by temperature in the duration of incubation and sex ratio of green turtle hatchlings at Ascension Island, one of the most important green turtle rookeries in the Atlantic. Temperature at control sites at nest depth and in 39 green turtle nests was measured using small temperature recording devices. The sex ratio of hatchlings was ascertained in a sub-sample of monitored nests allowing the description of the relationship between intranest temperature and hatchling sex ratio, demonstrating a pivotal incubation temperature of 28.8°C. The seasonal profile in sex ratio of hatchlings produced on all nesting beaches at Ascension Island was estimated, showing that a female-biased sex ratio would be expected with a female:male ratio of the order of 3:1. The use of nest temperature, air temperature, sand temperature at control sites, and incubation duration as proxies to estimate hatchling sex ratio are discussed.
History
Journal
Marine ecology progress seriesVolume
226Pagination
115 - 124Publisher
Inter-ResearchLocation
Oldendorf, GermanyISSN
0171-8630eISSN
1616-1599Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2002, Inter-ResearchUsage metrics
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Keywords
marine turtleChelonia mydastemperatureenvironmental sex determinationScience & TechnologyLife Sciences & BiomedicinePhysical SciencesEcologyMarine & Freshwater BiologyOceanographyEnvironmental Sciences & EcologyHATCHLING SNAPPING TURTLESCARETTA-CARETTACHELYDRA-SERPENTINACHELONIA-MYDASNESTING BEACHLEPIDOCHELYS-OLIVACEADERMOCHELYS-CORIACEAPIVOTAL TEMPERATURELOGGERHEAD TURTLESHAWKSBILL TURTLESZoologyOceanographyEcology
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