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首页> 外文期刊>Animal and Veterinary Sciences >Evaluation of Vaginal Temperature Measurements Versus Walking Activity as Tool for Detection of Estrus in Dairy Cows
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Evaluation of Vaginal Temperature Measurements Versus Walking Activity as Tool for Detection of Estrus in Dairy Cows

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In the present study we investigated the effect of measuring the vaginal temperature (VT) on the detection of estrus in Holstein Friesian cows. The effect of hormone treatment of cows with functional corpus luteum on the VT was evaluated by hourly measurement using a temperature data logger. Also walking activity was measured every 15 minutes for estrus detection. A total of 12 non-lactating Holstein Friesian cows were housed in two groups of 6 animals. For estrus synchronization two different methods were utilized. First group of cows was injected with prostaglandin (PG; PG group) and second with PG + Controlled Internal Drug Release (CIDR: PG + CIDR group). From 9 to 39 h the vaginal temperature (VT) in PG group of cows was 0.1 to 0.3 lower than VT in PG + CIDR group of cows. The cows that received PG + CIDR (exogenous progesterone) did not show a temperature decrease until CIDR was removed. This finding suggest that VT change reflected the progesterone concentration. The effect of VT measurement and the use of walking activity meter system on estrus detection was evaluated in cold and hot seasons. The estrus detection rate of the walking activity meter system was lower in summer than that obtained using the VT. The average of VT during estrus and non-estrus was not affected by season. Estrus detection using VT measurements could be effective throughout the year.

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