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Natural fish behaviour and catchability of groundfish

Godø, Olav Rune
Working paper
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CM_1994_G_14.pdf (1.771Mb)
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http://hdl.handle.net/11250/105293
Utgivelsesdato
1994
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  • ICES CM documents authored by IMR scientists (1949-2011) [3135]
Originalversjon
This report is not to be cited without prior reference to the author  
Sammendrag
Imprecision in estimates of abundance and population parameters obtained from trawl surveys

could be reduced if the sources of variability were understood and properly described. Fish

behaviour in relation to sampling gears has been widely studied, with the main goal of providing

information which might lead to improved reliability of abundance estimates. However, the

general applicability of the results may in many cases be questionable due to unidentified effects

of natural behaviour of the fish on catchability. Variability of natural behaviour may affect

catchability directly and, therefore, if aspects of natural behaviour are taken into account in

design and analysis of bottom trawl surveys, the reliability of the information obtained from

these surveys could be improved.
Utgiver
ICES
Serie
ICES CM Documents;1994/G:14

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