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The Heart Rate Responses Of Dairy Cows To Two Types Of Disturbances--Transportation And Aircraft Noises, Hoon M. Ahn
The Heart Rate Responses Of Dairy Cows To Two Types Of Disturbances--Transportation And Aircraft Noises, Hoon M. Ahn
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Three experiments were conducted using implanted heart rate (HR) transmitters. In the first experiment three lactating Holstein cows' HR signals were monitored telemetrically for three successive days under the normal herd management. Overall mean and standard error for these cows was 76.1 ± 0.46 bpm. In the second experiment the same three cows' HR signals were monitored with a portable computer and receiver. The cows were transported 400 kilometers one way over various road surface conditions. The HR signals were monitored consecutively at the beginning of the trip and at hourly intervals during travel. The cows stayed overnight and were …