Study

The effects of an underwater long-line setting funnel on the incidental capture of albatrosses Diomedeidae and petrels Procellariidae in the sub-Antarctic Indian Ocean, off the coast of the Prince Edward Islands, South Africa

  • Published source details Ryan P.G. & Watkins B.P. (2002) Reducing incidental mortality of seabirds with an underwater longline setting funnel. Biological Conservation, 104, 127-131

Actions

This study is summarised as evidence for the following.

Action Category

Set lines underwater to reduce seabird bycatch

Action Link
Bird Conservation
  1. Set lines underwater to reduce seabird bycatch

    A replicated, controlled study in a South African fishery, between 1998 and 2000 (Ryan & Watkins 2002) found that seabird bycatch in longline sets that used an underwater setting funnel was significantly lower than sets that did not use a funnel, both during the day (funnel: 2,255,150 hooks set, 23 petrels, 10 albatross killed, 0.015 birds/1,000 hooks; no funnel: 434,598 hooks set, 20 petrels, 1 albatross killed, 0.048 birds/1,000 hooks) and night (funnel: 317,503 hooks set, 3 petrels and no albatross killed, 0.009 birds/1,000 hooks; no funnel: 2,045,912 hooks set, 56 petrels, one albatross killed, 0.028 birds/1,000 hooks). However, a disproportionate number of albatrosses were killed during day-time sets using the setting funnel. The study took place in the Patagonian toothfish Dissostichus eleginoides fishery off the coast of the Prince Edward Islands.

     

Output references

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