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Acoustic survey of deep-water fish of the Skagerrak

Bergstad, Odd Aksel; Gordon, John D.M.; Dalen, John
Working paper
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CM_1992_H_15.pdf (1.133Mb)
URI
http://hdl.handle.net/11250/104966
Date
1992
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  • ICES CM documents authored by IMR scientists (1949-2011) [3138]
Original version
This report is not to be cited without prior reference to the authors  
Abstract
Introduction: Two fish species, the greater silver smelt Argentina silus and the

roundnose grenadier Coryphaenoides rupestris, are highly

abundant in the deep-water areas of the Skagerrak. Since the

1970s, a small aimed trawl fishery for the smelt has developed

and now also some grenadier is landed. The biology and

general distribution of both species have been described from

the Skagerrak and elsewhere. Due to their benthopelagic

distribution at depths from 200 to 700 m, previous attempts at

estimating abundance and biomass of the Skagerrak

concentrations yielded unsatisfactory results. In April 1992, during what appears as a major spawning season of the greater silver smelt, abundance estimation by the SIMRAD EK500 echo sounder and integrator was attempted. Comparisons were made between observations made by the hull-mounted transducer and a transducer mounted in a newly developed towed body.
Publisher
ICES
Series
ICES CM Documents;1992/H:15

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