放牧家畜の歩数記録用データロガの開発 A New Data-logger for Automatic Recording of the Steps Taken by Grazing Cattle
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An ambulatory data-logger system for recording the number of steps every minute taken by grazing cattle was developed, the accuracy of the transducer investigated and a method for estimating distance walked from steps suggested. The data-logger (named pedo-recorder) consisted of a digital pedometer as a transducer and a data memory unit. The transducer was attached around the metacarpus of the right foreleg. It generated two electric signals each step, therefore the values corresponded to the actual steps of the right and left forelegs. In a case, during 5-hour grazing period the mean of total steps was 13.7% higher than that by visual observations. Adjustment by correction factor for each transducer-animal combination would improve accuracy. Distance walked might be estimated by calibrating distance walked per step. A combination of the pedo-recorder and other data-logger sets could provide a useful analysis of the relationships among grass characteristics, pasture size, grazing behavior and animal production.
- Nihon Chikusan Gakkaiho
Nihon Chikusan Gakkaiho 69(3), 276-280, 1998-03-25
Japanese Society of Animal Science