Freshwater animals can be tracked using VHF technology over short distances. Our partner, Lotek, has spent many years developing automated tracking along rivers and through hydro-electric dams etc. For more information about the advantages of coded VHF, please see "Coded Tags or Beeper Tags?" on our FAQ page.
Geolocators have proved very effective discovering fish migrating across the ocean, and depth time loggers help understand the behaviour when there. For more information on Geolocators & Temperature/Depth Recorder tags suitable for marine fish, please see Lotek's marine page.