Automated activity monitoring and visual observation of estrus in a herd of loose housed Hereford cattle: Diagnostic accuracy and time to ovulation
ST Nelson, CS Haadem, A Nødtvedt, A Hessle… - Theriogenology, 2017 - Elsevier
A prospective cohort study was performed in the purebred Hereford herd at Götala Beef and
Lamb Research Centre, Sweden. The study's first objective was to assess the ability of an
automatic activity monitoring system (AAMS) to detect estrus in beef suckler cows, and its
second objective was to estimate the time from estrus to ovulation. The study sample (n= 38)
consisted of 14 Hereford heifers and 24 Hereford cows. Standardized visual observation of
estrus was performed for 20 minutes thrice daily, and animal activity was recorded with an …
Lamb Research Centre, Sweden. The study's first objective was to assess the ability of an
automatic activity monitoring system (AAMS) to detect estrus in beef suckler cows, and its
second objective was to estimate the time from estrus to ovulation. The study sample (n= 38)
consisted of 14 Hereford heifers and 24 Hereford cows. Standardized visual observation of
estrus was performed for 20 minutes thrice daily, and animal activity was recorded with an …
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