Review and evaluation of three mitigation measures - bird-scaring line, underwater setting and line shooter - to reduce seabird bycatch in the Norwegian longline fishery
Working paper
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http://hdl.handle.net/11250/100449Utgivelsesdato
2000Metadata
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Sammendrag
Seabirds scavenge baits from the hooks of commercial longlines, resulting in incidental
seabird mortality and bait loss. As interactions between seabirds and longline fishing may
cause decline in seabird populations and reduced gear efficiency, the potential for solving this
problem by means of various mitigation measures has been tested. Four fishing experiments
were conducted in commercial longlining in the north Atlantic to investigate the effectiveness
of a bird-scaring line, underwater setting and a line shooter in reducing seabird bycatch during
longline setting. These results are reviewed and the performance of the mitigation measures is
evaluated. Accidental catches of birds were reduced by all three methods, most clearly by the
bird-scaring line that had an efficiency of 98-100%. The experiments also produced a
reduction in bait loss and raised the catch rates of target species, which are important
incentives for fishermen to employ mitigation measures.
Utgiver
ICESSerie
ICES CM documents2000/J:10