Author Information

A. M. Parkhurst
G. L. Hahn

Is the first presenter a student?

No

Type of Submission

Paper/Presentation

Abstract

Patterns of tympanic temperature response were identified in ad-lib-fed cattle exposed to constant or cyclic (±7 C) conditions at two levels of air temperature: 10 C and 28 C. Use of time series analysis following the DDS approach of Pandit and Wu indicate the thermoregulatory control dynamics for steers at 28±7 C were markedly different from those at the other conditions. Preliminary evaluations using the ideas of chaos and non-linear dynamics show promise of further characterization of stress responses in farm animals.

Keywords

circadian rhythms, tympanic temperatures, data dependent systems, time series, entrainment, chaos theory, non-linear dynamics, thermal stress

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Apr 30th, 9:00 AM

STATISTICAL ISSUES IN STUDIES OF THERMOREGULATION IN FARM ANIMALS

Patterns of tympanic temperature response were identified in ad-lib-fed cattle exposed to constant or cyclic (±7 C) conditions at two levels of air temperature: 10 C and 28 C. Use of time series analysis following the DDS approach of Pandit and Wu indicate the thermoregulatory control dynamics for steers at 28±7 C were markedly different from those at the other conditions. Preliminary evaluations using the ideas of chaos and non-linear dynamics show promise of further characterization of stress responses in farm animals.