Serum levels of progesterone, estrogens and their faecal metabolites along the estrous cycle in goats (Capra hircus, Linnaeus, 1758) / Níveis séricos de progesterona, estrógenos e seus metabólitos fecais durante o ciclo estral de cabras (Capra hircus, Linnaeus, 1758)

AUTOR(ES)

Sebastião Pereira de Faria Junior

DATA DE PUBLICAÇÃO

2006

RESUMO

Saanen e Toggenburg dairy goats (n=10) kept in a private flock in São Paulo State had their serum levels of progesterone and estradiol compared to faecal concentrations of the respective metabolites, through an interval corresponding to 3 estrous cycles. Hormonal profile was checked with behavioural manifestations of estrous searching for a better knowledge of the cycle of these breeds in brazilian environment, leading to a more efficient reproductive management. Correlations between serum and faecal levels were calculated, suggesting that the model of faecal hormone measurements could be valuable in cervidae. It was found an extremely significant correlation between progesterone serum concentration and progestin faecal concentration, with r=0,83 and p<0,0001. Between estradiol serum concentrations and its faecal metabolites? concentrations no significant correlation was found, with r=-0,16 and p<0,3916. Based on results observation and statistical analysis, we can assume that, in the circumstances of this trial, progestin faecal concentrations show a variation profile similar to that one of serum progesterone, through estrous cycle of goats; however, this fact could not be observed for estradiol metabolites, compared to serum estradiol concentrations.

ASSUNTO(S)

caprinos veterinary endocrinology steroids ciclo estral radioimunoensaio esteróides radioimmunoassay estrous cycle goats endocrinologia veterinária

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