Seabird and longline interactions: effectiveness of a bird-scaring streamer line and line shooter on the incidental capture of northern fulmars Fulmarius glacialis
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Published source details
Løkkeborg S. & Robertson G. (2002) Seabird and longline interactions: effectiveness of a bird-scaring streamer line and line shooter on the incidental capture of northern fulmars Fulmarius glacialis. Biological Conservation, 106, 359-364.
Published source details Løkkeborg S. & Robertson G. (2002) Seabird and longline interactions: effectiveness of a bird-scaring streamer line and line shooter on the incidental capture of northern fulmars Fulmarius glacialis. Biological Conservation, 106, 359-364.
Actions
This study is summarised as evidence for the following.
Action | Category | |
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Use a line shooter to reduce seabird bycatch Action Link |
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Use streamer lines to reduce seabird bycatch on longlines Action Link |
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Use a line shooter to reduce seabird bycatch
A replicated, randomised and controlled trial on a commercial long-lining vessel off the coast of mid-Norway in August 1999 (Løkkeborg & Robertson 2002), found that by-catch of northern fulmar Fulmarus glacialis was not significantly lower when a line shooter was used during line setting (13 fulmars hooked during 11 sets, 0.22 birds/1,000 hooks), compared with either control sets (32 fulmars in 11 sets, 0.52 birds/1,000 hooks) or with lines set using a streamer line as well (no birds caught on 11 sets with just the streamer line vs. a single bird or 0.02 birds/1,000 hooks on 11 sets with the streamer and shooter). This study is also discussed in ‘Use streamer lines to reduce seabird bycatch on longlines’.
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Use streamer lines to reduce seabird bycatch on longlines
A randomised, replicated and controlled trial on a commercial longlining vessel off the coast of mid-Norway in August 1999 (Løkkeborg & Robertson 2002), found that bycatch of northern fulmar Fulmarus glacialis fell to zero when a streamer line was deployed during line setting and just one bird (0.02 birds/1,000 hooks) when both a streamer line and line shooter were used, compared with 32 fulmars (0.52 birds/1,000 hooks) during control line sets, and 13 fulmars (0.22 birds/1,000 hooks) when just a line shooter was used. Eleven repeats of each treatment were used, with lines set during daylight. Streamer lines were 90 m long, with a 69 m streamer section with twelve 8 cm wide yellow tarpaulin streamers, 5.4 m apart, 0.5-2 m long. This study is also discussed in ‘Use a line shooter to reduce seabird bycatch’.
Output references
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