Reducing seabird bycatch in longline fisheries using a natural olfactory deterrent

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Citation: Pierre, J.P. and W.S. Norden, 2006. Reducing seabird bycatch in longline fisheries using a natural olfactory deterrent. Biological Conservation, 130, ps 406-415.
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Summary:

School shark (Galeorhinus galeus) liver oil dripped behind fishing vessels in the northern New Zealand snapper (Pagrus auratus) longline fishery reduced seabird numbers and dives on baits when compared to canola oil and seawater control treatments. The shark liver oil did not affect the number of target snapper, gurnard (Chelidonicthys kumu), kaha-wai (Arripis trutta), or trevally (Pseudocaranx dentex) caught.
Field Studies:
Location Fishing gear Reduction technique Bycatch species Effect on bycatch species Catch Effect on target catch Type
New Zealand Hooks-and-Lines Liver oil Seabirds Reduced interactions Snapper Did not affect target catch In the wild