Indication of high natural mortality for juvenile herring from acoustic and tagging data.
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http://hdl.handle.net/11250/103617Utgivelsesdato
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This report is not to be quoted without prior consultation with the General Secretary.Sammendrag
Natural mortality for juvenile herring (Norwegian Spring spawners)
is discussed on the basis of following data:
1. Acoustic estimates of the 1975 and 1976 yearclasses of
herring as 0-group and estimates from tagging data of these
yearclasses as 4 year old fish.
2. Acoustic abundance estimates of the 1978 herring yearclass
in Lavangen fjord, Northern Norway.
These data indicate a high natural mortality for juvenile herring.