Seabird mortality levels caused by net entanglement in the icefish trawl fishery in Subarea 48.3 became a concern in the late 1990s. At this time there was little knowledge on how to mitigate such mortality. As an interim measures a vessel specific 20‐bird mortality threshold was introduced for Subarea 48.3 in 2001. This provided a strong commercial incentive for industry to develop measures to reduce seabird bycatch levels. This resulted in the development and operational trialing of several measures, including net‐binding and net weighting. Net binding has proved to be a highly effective and simply applied mitigation measure and is thought to be largely responsible for the continued reduction in incidental mortality in the icefish trawl fishery in Sub area 48.3 from 0.26 birds/trawl in 2001 to 0.01 birds/trawl in 2008. Evidence suggests that net weighting and good deck practices to minimise the time that the net is on the water’s surface have been the key factors in reducing seabird entanglements during the haul down from 132 birds in 2005 to single figures in 2007 and 2008.
DEVELOPMENT OF EFFECTIVE MITIGATION TO REDUCE SEABIRD MORTALITY IN THE ICEFISH (CHAMPSOCEPHALUS GUNNARI) TRAWL FISHERY IN SUBAREA 48.3
Numéro du document:
WG-IMAF-09/15
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