A flexible sorting grid to reduce Pacific halibut (Hippoglossus stenolepis) bycatch in the US west coast groundfish bottom trawl fishery

作者：Lomeli Mark J M^*; Wakefield W Waldo

来源：Fisheries Research, 2013, 143: 102-108.

DOI：10.1016/j.fishres.2013.01.017

• Bycatch reduction device
• Flexible sorting grid
• Pacific halibut
• Bottom trawl

This study examined a flexible sorting grid excluder designed to reduce Pacific halibut (Hippoglossus stenolepis) bycatch in the US west coast groundfish bottom trawl fishery. Tests occurred off Washington during 2011 aboard a commercial trawler. A recapture net was used to quantify the retention rates of target and non-target species. Pacific halibut bycatch was reduced 61.6% by weight and 57.0% by numbers. Exclusion was greatest for Pacific halibut weighing more than 4.5 kg. A significant difference in the mean total length was also noted between Pacific halibut caught in the codend and the recapture net, with larger fish occurring in the recapture net. The retention of primary target groundfishes of marketable-size ranged from 76.7 to 89.3%. We demonstrated the capability of a flexible sorting grid excluder to reduce Pacific halibut bycatch in the groundfish bottom trawl fishery while retaining a relatively high proportion of the targeted species.

• 出版日期2013-6