Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Larsen, Roger B."

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    • Codend selectivity of the Danish seine investigated by the trouser trawl method 

      Isaksen, Bjørnar; Larsen, Roger B. (ICES CM Documents;1988/B:28, Working paper, 1988)
      During June 1986 codend selectivity of the Danish seine was measured using both diamond mesh codends and square mesh codends. Comparisons between different codends were made by the trouser trawl method, having two ...

    • Height and spread of the Danish seine 

      Isaksen, Bjørnar; Larsen, Roger B. (ICES CM Documents;1988/B:29, Working paper, 1988)
      Height and spread of trawls is successfully measured by the wireless "Scanmar" system. Several experiments made by fishermen have shown that this system will not work on the Danish seine. A modified version of the ...

    • Reduction of fish bycatch in shrimp trawl using a solid separator grid in the aft belly 

      Isaksen, Bjørnar; Valdemarsen, John Willy; Larsen, Roger B. (ICES CM documents;1990/B:47, Working paper, 1990)
      During 1989-90 a new concept to avoid bycatch of fish in shrimp trawl has been developed in Norway. The system consists of an aluminium grid, 0.6 - 1.0 m wide and 1.3 - l.5 m long, with bars spaced 19 mm. The grid is ...