A TEMPERATURE-SENSITIVE ACOUSTIC TRANSMITTER FOR REMOTE MONITORING OFSTOMACH TEMPERATURE IN AQUATIC ENDOTHERMS

A temperature-sensitive acoustic transmitter was developed to record a nd store stomach temperature. The equipment was used to quantify meal sizes in captive animals and to monitor stomach temperature changes in captive animals as a result of intake of food, snow, ice and seawater . The equipment has also been used to time food ingestion in free-rang ing animals. The transmitter consists of the electronic circuit, a the rmal sensor, an electro-acoustic transducer, a battery and the encapsu lation. The time between the transmitter pulses is a function of the s urrounding temperature of the transmitter.