A) Presence/Absence--automatedALL TRANSMITTERS

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SNOWHIGH WINDS

Snow Storm, May 2002

AntennaSolar panelBatteryReceiverData logger

B) Manual Localization

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CORT implant blank implanttreatment

% change in activity range

Example: CORT in sparrows

C) Multi-tower localization--automated

overview

antenna

Heart rate

localization

Satellite Telemetry

BiotelemetryWeddell Seal Work in the Antarctic

Telemetry• Radiotelemetry:

– transmitter size can be quite small (<1 g)– Transmission distance limited by geography– Relatively inexpensive ($150 per transmitter)– Can transmit location, movement, some physiological data

• Satellite Telemetry (GPS):– Larger transmitters (>30 g)– No limitation on transmission distance– Extraordinarily expensive ($10,000 per trans)– Can transmit location, movement, or physiological data

• Biotelemetry– Can record heart rate, depth, movement, speed– Usually the unit on the animal must be retrieved to

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