Table of Contents
ISRN Zoology
Volume 2011 (2011), Article ID 705790, 9 pages
http://dx.doi.org/10.5402/2011/705790
Research Article

Stallion Mate Choice and Mare Sexual Behaviour in a Herd of Sorraia Horses (Equus caballus)

Centro de Biologia Ambiental, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Edifício C2, 1749-016 Lisboa, Portugal

Received 26 January 2011; Accepted 20 March 2011

Academic Editor: M. Sarà

Copyright © 2011 Filipa Paiva Brandão Deslandes Heitor and Luís António Matos Vicente. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We examined the relationship between male mate choice, female sexual behaviour, and individual factors in a managed group of Sorraia horses. The herd comprised 9–11 adult mares and their foals. Two stallions were introduced into the mare group in different years for pasture breeding. Mare receptivity during oestrus was poorly correlated with individual factors. Stallions did not prefer to mate with mares that showed the greatest behavioural receptivity during oestrus. The older and more experienced stallion preferred to mate with the older, higher-ranking, or barren oestrous mares. The younger stallion preferred to mate with the more genetically related mares and showed higher oestrus discrimination of mares to who he kept proximity during oestrus. Mate choice was not associated with probability of foaling in the following year. The differential influence of individual factors on mate choice between the stallions could stem from differences in breeding experience and familiarity with the mares.