IUCN / SSC Cat Specialist Group - Digital Cat Library |
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| Viau, P. | |
| Estudo da fun‡Æo ovariana em fˆmeas de on‡a-pintada mantidas em cativeiro, por meio da extra‡Æo e quantifica‡Æo de ester¢ides fecais | |
| 2003 Full Book | |
Ovarian function of captive jaguars (_Panthera onca_; adults n=2 and pre-pubertal n=3) was assessed by extraction and quantification of fecal estrogens and progestins. Fecal samples were obtained 2-7 times per week during 16-18 months. Validation of solid phase radioimmunoassay for progesterone and 17-á-estradiol was performed for jaguar fecal extracts. Ovarian cycle mean duration (ñSEM), defined by two consecutive peaks of fecal estrogens, was 38.28 ñ 2.52 days (range, 25-44 days; n=7). Mean estrous phase duration was 10.42 ñ 1.15 days (range, 7-15 days), and inter-estrous phase mean duration was 28.00 ñ 1.43 days (range, 28-31 days). Basal fecal estrogen mean concentration in inter-estrous period was 31.26 ñ 1.34 ng/g of dry feces. During estrous period mean value was 115.91 ñ 8.82 ng/g of dry feces, and was observed a mean peak (164.45 ñ 3.49 ng/g of dry feces) between D-5 and D-2. Fecal progestins had a mean concentration of 0,44 ñ 0.05 æg/g of dry feces, with no significant variations during the cycles. Data obtained during the evaluation of fecal estrogen longitudinal profiles in the pre-pubertal group, allow to indicate the beginning of ovarian activity in August-September bimester with fecal estrogen mean peaks of 135.31 ñ 3.16 ng/g of dry feces. All animals started pre-pubertal phase around 20 months of age. |
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