PS-1 An Evaluation of Cow Age and Activity Traits During the Breeding Season to Assess the Effect on Pregnancy Status

Abstract The objective of this study was to evaluate activity traits and its influence on pregnancy during the breeding season. In a 2-year study, crossbred Angus cows (n = 17) were randomly assigned receive Knight global positioning system (GPS) tracking collar. All synchronized for fixed-timed artificial insemination (TAI) utilizing 7-d CO-Synch + CIDR protocol. Then, bulls turned out with cowherd 14-d after TAI 65-d Cows retrospectively classified in following groups: (1) conception 8), (2) Pregnant 6), or (3) Open 3). Cow measured as total daily distance traveled, water, percentage time spent near water grazing challenging topography (i.e., > 15% slope) analyzed Data using MIXED procedure SAS 9.4. model included main effect cow age year used fixed effect. When testing status traits, these effects did not (P 0.30) traveled had significant 0.03) wherein, younger further from source when compared older cows. Older tended 0.08) spend more source. Pregnancy no ≥ 0.25) nor impact 0.39) amount slopes. stronger behavior season status. More data will be collected validate results current study.