Acoustic survey of deep-water fish of the Skagerrak
Working paper
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http://hdl.handle.net/11250/104966Utgivelsesdato
1992Metadata
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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.