INVESTIGADORES
PIÑA Carlos Ignacio
artículos
Título:
Proporción de Sexos de Neonatos de Caiman latirostris (Crocodylia: Alligatoridae) Producidos en la Naturaleza
Autor/es:
SIMONCINI M.; PIÑA C.I.; SIROSKI P.; CRUZ F.B.; LARRIERA A.
Revista:
INSUGEO, Miscelánea
Editorial:
INSUGEO
Referencias:
Lugar: San Miguel de Tucuman; Año: 2008 vol. 17 p. 231 - 238
ISSN:
1514-4836
Resumen:
Abstract: SEX RATIO OF Caiman latirostris HATCHLINGS (CROCODYLIA: ALLIGATORIDAE) INCUBATED IN THE WILD. Caiman latirostris presents temperature dependent sex-determination. Under artificial incubation, eggs incubated at 29ºC or 31ºC produce 100% females, meanwhile at 33ºC 100% males are produced and incubation at higher temperature (34.5ºC) induces both sexes. Incubation temperature of wild nests could be influenced by different factors, affecting hatchling sex. In this study, we compare four reproductive seasons, analyzing the relationship between proportion of females and climatic variables of that period. We use 60 nests, collected in wild populations after sex was already fix (not change on sex occurs after 41 days of incubation). Animals were sexed when one year of age or older. We found that females’ proportion was different among seasons, but not related to any of the climatic variables analyzed, but we assume this was possible due to sampling size. On the other hand, during the study period the amount of nests producing 100% females were triplicated, which could be related to air mean temperature and the number of storms during the thermo-sensitive period.