We seek to compile findings documenting the long-term effects of fisheries discharge practices on seabird catch risk in marine capture fisheries, including in pelagic and demersal longline and trawl fisheries. Relative to vessels that refrain from discharging any organic material at sea, does discharging offal, spent bait and dead discarded catch during fishing operations reduce long-term catch risk by keeping scavenging seabirds away from the area where they are at risk of capture, or is the magnitude of any short-term benefit to birds in reduced catch risk offset by a relatively larger magnitude increase in bird catch risk from discharges causing a long-term increase in the abundance of birds attending vessels that provide a food subsidy, increasing competitive scavenging behavior, and/or other responses to vessel discharges?
Here are some publications. Might be useful to you....
http://www.publish.csiro.au/MU/MU12002
Article Reducing interactions between seabirds and trawl fisheries: ...
http://www.jstor.org/stable/24875481?seq=1#page_scan_tab_contents
Article The economic cost of seabird bycatch in Argentinean longline fisheries
Hi Eric,
colleagues in my Institute worked on theis issue:
Article Seabird bycatch in Spanish Mediterranean large pelagic longl...
Article Cory's shearwater by-catch in the Mediterranean Spanish comm...
Article Modelling abundance and distribution of seabird by-catch in ...
I hope these could hel you.
regards
juan A C.
This one is a bit old, but may be useful for a long term perspective ;-)
Technical Report Consumption of discards by seabirds in the North Sea
See... http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2015-0326#.WkAso9-nFPY
Probably un this paper:
https://www.researchgate.net/publication/227997127_Captures_of_swordfish_Xiphias_gladius_Linnaeus_1758_and_loggerhead_sea_turtles_Caretta_caretta_Linnaeus_1758_associated_with_different_bait_combinations_in_the_Western_Mediterranean_surface_longline_f?_sg=t75I5btZkRdmsWCRIuhCAx6KN0DXQbveQmEY3dHObnXmWy770MSgI1ehTp3rJ0sOrjHcXhBj9Vr653sCGAiPVwOXhttbNumwnSPraW1L.n6DN134vm_1fYkSDDbn2HQ-FC247sDUomqCZCM4aT98QtPVH_jjKlT5rkYDawAil7H34Yc5k9UtE8oOdXrJQKQ
These two reports covered that kind of information for seabird catch risk (and other protected species) in New Zealand fisheries
https://www.doc.govt.nz/our-work/conservation-services-programme/csp-reports/2017-18/characterising-discharge-management-in-small-vessel-trawl-and-longline-fisheries/
https://www.doc.govt.nz/our-work/conservation-services-programme/csp-reports/201819/Characterisation-and-mitigation-of-protected-species-interactions-in-the-inshore-trawl-fisheries/
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