INVESTIGADORES
FRAUNHOFFER NAVARRO Nicolas Alejandro
congresos y reuniones científicas
Título:
Lagostomus maximus NATURAL OVULATION
Autor/es:
WILLIS MIGUEL A.; LEOPARDO NOELIA P.; FRAUNHOFFER NICOLAS A.; MUSCARSEL MARIA L.; VITULLO ALFREDO D.
Lugar:
Buenos aires
Reunión:
Jornada; XI Jornadas anuales de la Sociedad Argentina de Biología; 2009
Institución organizadora:
Sociedad Argentina de Biología
Resumen:
In the early 70s, Weir established the vizcachas ovulation rate based on her own observations of 11 females, estimating it between 400 and 800 oocytes per reproductive cycle. Weir washed one of the two uterine horns of 6 females, the oviducts of 2 of them and both horns of 1 animal. The remaining uteri were fixed and analyzed for oocytes within them. Within the scope of female germline dynamics in L.m, a rodent with massive ovulation, the aim of this study was to verify ovulation rate. Animals were captured at ECAS during the 2 annual ovulatory periods (February/March, N=16 and September/October, N=10). Eggs and embryos were recovered by flushing of both horns and oviducts. Ovaries were screened for ovulation signs. Maximum ovulation for February/March was 326 oocytes with a mean value of 140, range 1-326. In September/October max value reached 205, with a mean of 116, range 29-205. These results confirm the existence of massive ovulation in L.m although the levels found in this study are lower than those reported by Weir.
