Instrument: Wildlife Computers TDR

Instrument Short Name: TDR
Instrument Description:

Time depth recorders (TDR's) manufactured by Wildlife Computers, Redmond WA) are designed for studies of seals, penguins, fish, and marine mammals. Standard TDR's are mounted externally on the animal's body, where they record temperature and depth. See more information from the manufacturer.

PI supplied instrument name: Wildlife Computers TDR
Dataset-specific description

TDR's were epoxied to seals along the dorsal midline. All TDR tags were equipped with an Eco-tech floatation pack and a VHF radio transmitter to allow for tracking and retrieval of the device once it became detached from the animal. TDR sensors were set to sample every 10 seconds and record only dives >2 m in depth or >30 s in duration. In 2009, the TDR's used contained an MK10-AF Argos transmitter.