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Pasture mating behaviour of donkeys (Equus asinus) at natural and induced oestrus
M Henry1, S M McDonnell, L D Lodi
1School of Veterinary Medicine, University of Minas Gerais, Belo Horizonte, Brazil.
Abstract:
The mating behaviour of 2 jacks, each with 21 non-pregnant jennies, was studied when the jennies were in natural oestrus and simultaneously induced oestrus. The main observations were: efficient pasture breeding at natural and induced oestrus, a territorial sociosexual structure, prolonged pre-copulatory interaction, gradual increase of mating activity up to 2 days before ovulation, a copulatory sequence similar to that of horses, vocalization of the jack as a conspicuous behaviour initiating pre-copulatory interaction, frequent heterotypical behaviour of jennies and active involvement of jennies in initiating pre-copulatory interaction.