Distribution and abundance of sprat in the North Sea in winter 1979-1980 determined by acoustic methods.
Working paper
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http://hdl.handle.net/11250/103599Utgivelsesdato
1980Metadata
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This report is not to be quoted without prior consultation with the General Secretary.Sammendrag
To estimate the size of the North Sea sprat stock acoustically
two cruises were carried out in November 1979-January 1980. The
method is described and the size of the sprat stock was estimated
to about 1 million tons. This is probably an underestimate due
to the fact that some of the sprat stock were distributed close
to the bottom orsea surface and therefore out of range of the
acoustic equipment, and also due to the fact that the applied
average target strength possibly is too high.