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The electronic monitoring of physiological responses is essential for managing animal production systems considering market demands for animal welfare. The objective of this study was to design, build, and test an electronic monitoring system, with recording and wireless transmission capability, for measuring the heart rate and skin temperature in small ruminants. The system had two components: a mobile base unit, mounted on the animal under study, and a fixed base unit. Wireless communication between the mobile and fixed units was performed using a Xbee Series 2 radio frequency transceiver whereas data were recorded and transferred to a secure digital card in the mobile unit. The device was mounted in Santa Inês crossbred sheep using reference equipment while the animals were restrained in steel cages. Subsequently, the device was validated in free-living Dorper sheep in two collection periods (morning and afternoon). The results indicated that the monitoring system accurately measured physiological responses and efficiently recorded and transmitted data, particularly heart rate data. However, one of the limitations was low energy autonomy.

ELECTRONIC MONITORING SYSTEM FOR MEASURING HEART RATE AND SKIN TEMPERATURE IN SMALL RUMINANTS