Acoustic Telemetry
There are a variety of ways to track the movements of fish. In the past, mark-recapture (attach a specific id to fish prior to release so that it can be identified when captured again) studies were the best way to understand distances traveled, migration routes, and growth rates. The advent of acoustic technology created the ability to sample with greater resolution. Active acoustic tracking was the best option 15-20 years ago (depending on study design). This entailed surgically implanting an acoustic transmitter (uniquely coded tag) into an individual and following the fish in real-time after release with a hydrophone unit. Methods have advanced to be more hands-off since. Now, acoustic receivers are moored in the water and log transmitter information when the fish swims within range. Transmitters/receivers are capable of logging temperature, depth, acceleration, among others. Using statistical methods we can approximate the position of the animal and follow its movements (greater accuracy with more receivers). A wealth of different technologies now exist.
Please see the below links for more information:
There are a variety of ways to track the movements of fish. In the past, mark-recapture (attach a specific id to fish prior to release so that it can be identified when captured again) studies were the best way to understand distances traveled, migration routes, and growth rates. The advent of acoustic technology created the ability to sample with greater resolution. Active acoustic tracking was the best option 15-20 years ago (depending on study design). This entailed surgically implanting an acoustic transmitter (uniquely coded tag) into an individual and following the fish in real-time after release with a hydrophone unit. Methods have advanced to be more hands-off since. Now, acoustic receivers are moored in the water and log transmitter information when the fish swims within range. Transmitters/receivers are capable of logging temperature, depth, acceleration, among others. Using statistical methods we can approximate the position of the animal and follow its movements (greater accuracy with more receivers). A wealth of different technologies now exist.
Please see the below links for more information:
