title: New developments in ultrasonic fish tracking.
abstract: A range of small, long-life ultrasonic fish tags is described and their use illustrated with an improved system of fixed hydrophone tracking stations. A boat-mounted hydrophone system giving bearing and range estimations for use in open-water fish tracking is described together with a portable hand-held unit for simple location of tagged fish in rivers, etc. Typical results based on intensive use of these systems are given.
mesh_terms: D000818:Animals; D009043:Motor Activity; D012487:Salmonidae / Q000502:physiology*; D013686:Telemetry; D014159:Transducers; D014337:Trout / Q000502:physiology*; D014465:Ultrasonics