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Other documentCanadian fishery closures provide a large scale test of the impact of gillnet bycatch on seabird populations 2013
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No results found.In 1992, the eastern Cadian gillnet fisheries for northern cod and Atlantic salmon were largely closed. These large-scale fishery closures resulted in the removal of tens of thousands of gillnets known to inflict high levels of sea- bird mortality. We used this unprecedented opportunity to test the effects of gillnet removal on seabird populations. Consistent with predictions, we show that the breeding populations of divers (auks, gannets; susceptible to gillnet bycatch) have increased from pre- closure levels, whereas the popu- lations of scavenging surface-feeders (gulls; low vulnerability to gillnet bycatch but susceptible to removal of fisheries discards) have decreased. Using the most complete series of seabird census data for the species most vulnerable to bycatch, we demonstrate a positive population response of common murres to reduction in gillnet fishing within its foraging range. These findings support the widespread but seldom documented contention that fisheries bycatch neg atively impacts populations of non-target large vertebrates. -
BrochureREQUEST FOR OBSERVER STATUS FROM THE INTERNATIONAL POLE AND LINE FOUNDATION 2013
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Meeting documentA simulation framework for testing the procean model and developping Baysian priors. Preliminary results 2013
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