title: Determination of fish swimming speed by ultrasonic telemetry.
abstract: Design of a small and simple sensor for direct measurement of swimming speed of fish and its incorporation into ultrasonic telemetry transmitters is described. The sensor used measures the speed of rotation of a free-wheeling propeller which is exposed to water flow. Two transmitters incorporating this sensor are described. The first is a very simple one providing swimming speed while the second incorporates two temperature sensors as well.
mesh_terms: D000818:Animals; D005399:Fishes / Q000502:physiology*; D013550:Swimming; D013686:Telemetry / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D014465:Ultrasonics / Q000295:instrumentation