Individual herring measured with a probe with 38 kHz in CW and 70, 120 and 200 kHz in FM mode, lowered to 100 m depth. Average length of the herring was 30 cm.
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 Egil Ona
http://www.imr.no
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Summary
Individual herring measured with a probe with 38 kHz in CW and 70, 120 and 200 kHz in FM mode, lowered to 100 m depth. Average length of the herring was 30 cm.