TAROUCO, Adriana Kroef et al. Social-sexual condition of the Brazilian Pony Breed population. Rev. etol. []. 2011, 10, 1, pp.34-44. ISSN 1517-2805.

The formation of harems in ponies involves factors as testosterone level of stallion, age and dominance. The objectives were to verify the stability and repeatability of the composition of harems and the relationships between plasmatic levels of testosterone and the social-sexual condition of the stallions. The stability of harems depended of reproductive status of females and dominance of stallion. All the stallions had their mean testosterone plasmatic levels increased, in average, 77, 6%, when were exposed to the mares, and when they formed harems (average of 85, 6%), while the stallions of bachelor group had lower levels.

: Equine; Harem; Stability; Testosterone.

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