Accession Number : ADA306076

Title :   Instrumentation for and Indices of Marine Mammal Responses to Low Frequency Sound.

Descriptive Note : Final rept. 1 May 92-30 Apr 95,

Corporate Author : BRITISH COLUMBIA UNIV VANCOUVER DEPT OF ZOOLOGY

Personal Author(s) : Jones, David R.

PDF Url : ADA306076

Report Date : MAR 1996

Pagination or Media Count : 4

Abstract : Our objective was to develop instrumentation capable of remotely monitoring behavioral and physiological variables from marine mammals. A stomach temperature telemeter (STT) which transmits to a receiver in the animal mounted data logger was developed for recording prey ingestion events. Feeding studies demonstrated that with proper calibration, the STT system can indicate the timing of prey ingestion and can also be used to estimate the quantity of prey ingestion. A heart beat detector/telemeter and receiving module was developed and found to be suitable for recording heart rate from northern elephant seals, California and Steller sea lions, and harbor porpoise. We developed and successfully tested at sea a device for the remote release and retrieval of data loggers. Our custom data loggers and sensors have been successfully applied to a study of the at-sea behavior and physiology of northern elephant seals. During migration, the patterns of dive depth, swim speed, and heart rate are fairly predictable. Therefore, these variables should be good indices of disturbance responses. In the lab, the heart rate response to various threat stimuli is one of dramatic bradycardia, which should be a good response index.

Descriptors :   *MAMMALS, *ANIMALS, *AQUATIC ANIMALS, *TELEMETER SYSTEMS, TEMPERATURE, DETECTORS, THREATS, DEPTH, RESPONSE, SOUND, INFORMATION RETRIEVAL, RELEASE, PATTERNS, PHYSIOLOGY, RECORDING SYSTEMS, MOUNTS, INDEXES, CALIFORNIA, CALIBRATION, STIMULI, RESPONSE(BIOLOGY), INGESTION(ENGINES), HEART RATE, FEEDING, LOW FREQUENCY, REMOTE CONTROL, HARBORS, DIVING, SEALS(MAMMALS), BRADYCARDIA, STOMACH, PORPOISES.

Subject Categories : Biology
      Recording and Playback Devices
      Telemetry

Distribution Statement : APPROVED FOR PUBLIC RELEASE