Avoidance reactions of ultrasonic tagged cod during bottom trawling in shallow water
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http://hdl.handle.net/11250/104860Utgivelsesdato
1991Metadata
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This report is not to be cited without prior reference to the authorsSammendrag
Introduction: Observations made by echo sounder (Ona 1988) have shown that cod (Gadus morhua L.) may
avoid an approaching survey vessel horizontally and vertically. However, there has been a
lack of information on the escapement behaviour of the individual fish. This short note
discribes an experiment carried out in a shallow fjord in Northern Norway, where the
reactions of single cod towards a small survey vessel during bottom trawling were studied,
using ultrasonic tagging technique.