论文信息 - The Effects of Recording Interval on the Estimation of Grazing Behavior of Cattle in a Daytime Grazing System

The Effects of Recording Interval on the Estimation of Grazing Behavior of Cattle in a Daytime Grazing System

The effects of recording interval (1, 2, 3, 4, 5, 10, 15, 20 and 30 min) on the estimation of some grazing behavior variables in beef cows and calves ( rumination time>resting time. An increase in recording interval always decreased estimates of the distance walked by animals. It was concluded that recording intervals of 1-5 min provide reliable estimates of the time spent grazing, ruminating and resting. It was also concluded that positioning of animals at 1 min intervals may provide estimates of walking distance with acceptable bias toward underestimation. (Asian-Aust. J. Anim. Sci. 2002. Vol 15, No. 5 : 745-750)

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