Effects of fecal age and seasonality on steroid hormone concentration as a reproductive parameter in field studies |
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Authors: | Teresa Abáigar Miguel A Domené Francisco Palomares |
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Institution: | 1.Estación Experimental de Zonas Aridas/CSIC,Crta. De Sacramento s/n,Almería,Spain;2.Department of Conservation Biology, Estación Biológica de Do?ana/CSIC,Avda. Américo Vespucio s/n,Sevilla,Spain |
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Abstract: | We studied how fecal age (6, 12, 24, 48, 72, and 168 h) and seasonality affect variation in the fecal steroid hormone metabolite
concentration in three endangered mammalian species, Mhorr gazelle, Saharan Barbary sheep, and the Iberian lynx. Except for
estrogens, concentrations remained stable for at least 48 h in the Mhorr gazelle and the Saharan Barbary sheep. Steroid hormone
metabolite concentration remained stable in the Iberian lynx throughout the experiment (1 week). Seasonality was the main
factor affecting variation in hormone metabolite concentrations, and although the response was species- and hormone-specific,
the dry season resulted in increased hormone metabolite concentrations, while the wet season reduced the concentration. |
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