Salmon measured with echo sounders at 25 m depth facing upwards inside a netpen. 38, 70, 120, 200 and 333 kHz were operated in FM mode. The average fork length of the salmon was 415 mm and average weight was 884 g. Four different pulse type settings were used sequentially.
Institute of Marine Research, Norwegian Marine Data Center Institute of Marine Research, Norwegian Marine Data Center
Datacenter Arnfinn Morvik
NO/IMR Institute of Marine Research
Originating institution Tonje Nesse Forland
http://www.imr.no
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Summary
Salmon measured with echo sounders at 25 m depth facing upwards inside a netpen. 38, 70, 120, 200 and 333 kHz were operated in FM mode. The average fork length of the salmon was 415 mm and average weight was 884 g. Four different pulse type settings were used sequentially.