Longitudinal profiles of fecal steroids concentrations in jaguarundi?s females (Herpailurus yagouaroundi, Lacépède, 1809) / Avaliação longitudinal das concentrações de esteróides fecais em fêmeas de gato-mourisco (Herpailurus yagouaroundi, Lacépède, 1809)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

The aim of this study was analyze the ovarian cycle of captive jaguarundi (Herpailurus yagouaroundi) trough fecal steroid. Radioimmunoassay (RIA) was used for the measurement of estradiol, progesterone and cortisol metabolites in feces. Fecal samples were collected five days per week from eight females kept at Fundação Parque Zoológico de São Paulo during nine months. These samples were placed into zip-lock bags and stored in freezer at - 20°C. The median of estrous cycle length, defined by two consecutive peaks of fecal estradiol metabolites, found in this study was 24 days (n=33 cycles) and the mean (±SEM) of estrous duration was 8,65±0,38 days (n= 41 cycles). The median concentrations of fecal estradiol metabolites were 4,67ng/g of feces and 87,32ng/g of feces for basal and peak values respectively. Progestins median found was 0,75ug/g of feces for basal and 7,49ug/g of feces for peak values. The fluctuations in progestins profiles suggested that spontaneous ovulation did not occur. No correlations were found between progestins and fecal corticosterone during pregnancy, lactation and kitten removal.

ASSUNTO(S)

radioimunoensaio metabolites esteróides felidae ciclo estral animal animal estrous cycle felidae metabólitos radioimunoassay steroids

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