RFID tracers and survey methods
By Columbia Environmental Research Center
2019 (approx.)

Detailed Description
Radio frequency identification (RFID) tracers and survey methods. Clockwise from upper left: RFID tracer rocks, RFID-tagged live mussels, accelerometer tracer rocks, accelerometer sham mussels, RFID sham mussels, and a kayak-based antenna system.
Sources/Usage
Public Domain.