Sexual behaviors of Ongole Crossbred bulls and cows with colony housing system

This study was conducted to determine the sexual behaviors of Ongole crossbreed bulls and cows with colony housing systems. Bull sexual behaviors was observed, including Oro-Nasal Contact (ONC), Flehmen, Mounts Orientation Response (MOR), Mounts, and Services. Cows sexual behaviors were: Mounting, Standing-to-be-mounted (STBM), and vulvar appearance (color, swelling, secretion of mucus). Sexual behaviors were observed in 24 hours, with the estrous cycle stage was determined by changes in the character of the vaginal epithelial cells. The data was analyzed by using statistic varian one-way method. The result showed that Ongole crossbreed bulls had sexual behaviors (ONC, Flehmen, MOR, Mounts, and Services) significantly higher than cows with estrous phase (P<0.01). The intensity of bull sexual behaviors had been influenced by the phase of estrous of the cows. At the time of estrus, the cows had the response of mounting (25), STBM (100), reddening vulva (75), swelling vulva (75), and mucus secretion (100) that could be a factor of high sexual behavior intensity of the bulls. The conclusion of this study was bulls and cows that kept with the colony housing system had increased sexual behaviors when the cows at the estrous phase.