Fast sinking (integrated weight) longlines reduce mortality of white-chinned petrels (Procellaria aequinoctialis) and sooty shearwaters (Puffinus griseus) in demersal longline fisheries
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Published source details
Robertson G., McNeill M., Smith N., Wienecke B., Candy S. & Olivier F. (2006) Fast sinking (integrated weight) longlines reduce mortality of white-chinned petrels (Procellaria aequinoctialis) and sooty shearwaters (Puffinus griseus) in demersal longline fisheries. Biological Conservation, 132, 458-471.
Published source details Robertson G., McNeill M., Smith N., Wienecke B., Candy S. & Olivier F. (2006) Fast sinking (integrated weight) longlines reduce mortality of white-chinned petrels (Procellaria aequinoctialis) and sooty shearwaters (Puffinus griseus) in demersal longline fisheries. Biological Conservation, 132, 458-471.
Actions
This study is summarised as evidence for the following.
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Weight baits or lines to reduce longline bycatch of seabirds Action Link |
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Weight baits or lines to reduce longline bycatch of seabirds
A replicated, controlled and paired study using longlines in November 2002 and 2003 in New Zealand (Robertson et al. 2006), found that using ‘integrated weight’ longlines reduced mortality of white-chinned petrels Procellaria aequinoctialis by 94-99%, and of sooty shearwaters Puffinus griseus by 61%, compared to unweighted lines (petrels: one and four birds on weighted lines vs. 81 and 43 in 2002 and 2003 respectively; shearwaters: 15 birds on weighted lines in 2003 vs. 38 on unweighted lines; a single shearwater was killed on an unweighted line in 2002). A total of 213 paired sets of lines were set, with integrated lines containing 50 g/m of lead. All lines were set under a single streamer line (see ‘Use streamer lines to reduce seabird bycatch on longlines’ for studies testing this intervention).
