INVESTIGADORES
JAHN Graciela Alma
congresos y reuniones científicas
Título:
Levels of estrogen and progesterone associated with incubation process in Tupinambis merianae.
Autor/es:
CHAMUT S; GARCÍA VALDEZ MV; JAHN GA; ARCE O; MANES ME
Lugar:
San Juan
Reunión:
Congreso; II Reunión Conjunta de Sociedades de Biología de la República Argentina; 2011
Institución organizadora:
Sociedad de Biología de Cuyo
Resumen:
During the reproductive cycle Tupinambis merianae displays a set of maternal behaviors related to the incubation of eggs. These behaviors, such as nest construction, the contribution of temperature and humidity to incubation and protective responses are unusual among reptiles. We compare the plasma levels of estrogen and progesterone in females while actively incubating (ovulatory reproductive cycles) with those that are not (anovulatory reproductive cycles followed by follicular atresia). Studies with RIA showed that incubating females exhibit plasma levels of estrogen and progesterone greater than those that are not incubating. These differences are significant in the case of estradiol. Preliminary histological studies of the gonad during incubation revealed the presence of corpora lutea -like structures. It is proposed that these structures are responsible for the higher plasma concentrations of both hormones.