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Título: Temperature Controlled Sex Determination In Turtles
Autor(es): J J Bull
Richard Carl Vogt
ISSN: 0036-8075
Revista: Science (New York, N.Y.)
Volume: 206
Resumo: The sex of many reptiles is determined by incubation temperature. Laboratory studies of 14 genera of turtles in five families show that a developmental temperature of 25 C produces all males in most species, and that 31 C or higher produces all females. Survival of embryos to hatching is sufficiently high in some studies to conclude that this phenomenon is not due to differential death of the sexes. Field studies corroborate the laboratory work and suggest that nest temperature is the chief agent determining sex. The sex ratio of natural populations may be influenced by climatic changes, but natural selection on maternal choice of nest sites and on the embryonic control of sex determination may compensate for climatic change and bring the sex ratio to its equilibrium.
ISSN: 0036-8075
Aparece nas coleções:Coordenação de Biodiversidade (CBIO)

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