The temperature-sensitive period (TSP) during incubation of broad-snouted caiman (Caiman latirostris) eggs

Amphibia - Reptilia - Tập 28 Số 1 - Trang 123-128 - 2007
Carlos I. Piña1,2,3, Pablo Siroski3, Alejandro Larriera3, Valentine A. Lance4, Luciano M. Verdade1
1-Laboratório de Ecologia Animal/Universidade de São Paulo, Caixa Postal 09, Piracicaba, SP, 13418-900, Brazil
2-Proyecto Yacaré, CICyTTP-CONICET Dr. Matteri y Es-paña, CP 3105 Diamante, Entre Ríos, Argentina
3-Proyecto Yacaré, Min. Prod. Bv. Pellegrini 3100, CP 3000 Santa Fe, Argentina
4-Graduate School of Public Health, San Diego State Uni-versity, 5500 Campanile Drive, San Diego, CA 92182-4162, USA

Tóm tắt

Abstract All crocodiles studied to date exhibit temperature-dependent sex determination. During the many weeks from egg laying to hatch there is a period of 10 to 15 d in the middle third of incubation (in the American alligator) during which the sex of the embryo is irreversibly fixed, referred to as the temperature-sensitive period or TSP. In this work we investigated the TSP in Caiman latirostris eggs incubated at female-inducing and male-inducing temperatures (29° C and 33° C respectively) by switching eggs from 29° C to 33° C and vice versa at timed interval throughout incubation. Compared to Alligator mississippiensis the duration of TSP was longer, and the onset of TSP was at an earlier stage of incubation.

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Amphibia - Reptilia

Tập 28 Số 1

123-128

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