Abstract
In this work, we studied retrospectively the influence of several factors on semen quality of the Spanish Purebred (SPB) stallion. Among these factors, we considered stallion age, season, and interval between two consecutive collections. The semen was collected from 11 SPB stallions (634 ejaculates). Semen quality was evaluated based on volume, concentration, and motility of the ejaculates. Results showed that the semen collected in autumn and winter was more concentrated in comparison with that collected in spring and summer, when the volume of ejaculate was the highest. Those ejaculates collected from younger stallions were characterized by having the smallest volume and the highest sperm concentration. When incorporating an SPB stallion into a program of artificial insemination, it is important to take into account all of these factors to achieve the maximum reproductive potential of the animal.
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