MEASUREMENT OF BURST SWIMMING PERFORMANCE IN WILD ATLANTIC SALMON (SALMO SALAR L.) USING DIGITAL TELEMETRY

摘要

Swimming performance of wild Atlantic salmon (Salmo salar L.) was investigated in an experimental flume using coded radio signals. To calculate swimming speed, distance moved and time elapsed were measured with a digital spectrum processor using near real-time spectrum analysis. This device was designed to be used in a coprocessing arrangement with a receiver, thereby providing pulse position code discrimination, verification and continuous data storage. Radio-tagged adults (48.3 to 54.8 cm long) voluntarily swam against water velocities, ranging from 1.32 to 2.85 m s~-1, in an 18 m long flume at a mean water temperature of 10.1±1.6/100.