Using vertical distribution to separate fish from crustaceans in a mixed species trawl fishery

Authors
Karlsen, J.D., Krag, L.A., Herrmann, B., Lund, H.S.
Year
Journal/Publisher Name
Canadian Journal of Fisheries and Aquatic Sciences
Volume (Issue #)
76(10)
Page #s
1781-1794
Contact information
Tel.: +45 35 88 32 52; Fax: +45 35 88 32 52; e-mail address: jka@aqua.dtu.dk
Summary

The study tested the use of a horizontally divided codend with small square mesh (40mm) and a simple frame to stimulate fish to swim into the upper compartment of a separator trawl. The majority of fish were separated successfully from Nephrops norvegicus, but fish preference for both trawl compartments was uniform. Additionally, separation efficiency was lower for small roundfish and flatfish. 

Field Studies

Using vertical distribution to separate fish from crustaceans in a mixed species trawl fishery

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Norway lobster (Nephrops norvegicus)
Effect on bycatch species
The majority of fish were separated successfully into the upper compartment
Effect on target catch
Not tested
Bycatch species
Reduction technique
Fishing Gear