Abstract

MONTES-PEREZ, Rubén et al. Sex allocation of Odocoileus virginianus by analysis of excreta subjected to outdoor. Abanico vet [online]. 2016, vol.6, n.2, pp.13-21. ISSN 2448-6132.  https://doi.org/10.21929/abavet2016.62.1.

The objective was to evaluate the efficiency of the allocation sex white-tailed deer adults in reproductive and non-reproductive periods, by measuring levels of proportion of metabolites of androgens, estrogens and fecal progestins and morphometric measurements of excreta, subject to weather for 0, 10, 20 and 30 days. Deer fecal samples were collected in three farms of Yucatan State. Each sample was identified by animal and sex. Values were morphometric width, length, length/width and average pellet volume, the analysis was applied fuzzy clustering. Fecal steroid metabolites were estimated by radioimmunoassay. Androgen/progestin, progestins/androgens, estrogens/androgens, androgens/estrogens, progestins/estrogens and estrogen/progestin indexes were calculated. Theory predictive value was used in both methods to evaluate efficiency. It is concluded that the allocation of sex ratios of fecal estrogen metabolites/androgen and androgen/estrogen weather of 0 and 10 days are efficient in non-breeding season; progestin/estrogen, progestins/androgen, estrogen/androgen in the four days of weather, have greater efficiency in the breeding season, the morphometric method is not efficient in both seasons, nor in any of the treatments outdoors.

Keywords : deer; sex allocation; efficency; steroids hormone; morphometry excreta.

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