Northwest Fisheries Science Center

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Document Type: Chapter or Section
Center: NWFSC
Document ID: 7627
Type of Book: Technical
Section or Chapter Title: Testing of Pacific Halibut Bycatch Reduction Devices in Two US West Coast Bottom Trawl Fisheries
Book Title: Fisheries Bycatch: Global Issues and Creative Solutions
Series Title: Lowell Wakefield Fisheries Symposium
Author: Mark J.M. Lomeli, W. Waldo Wakefield
Publication Year: 2015
City: Fairbanks, Alaska
Publisher: Alaska Sea Grant, University of Alaska Fairbanks
Keywords: bycatch,bycatch reduction device,Pacific halibut,
Abstract:
The US West Coast limited entry (LE) groundfish trawl fishery is managed
under an Individual Fishing Quota (IFQ) program that establishes
annual catch limits and IFQs for over 60 groundfish species, and individual
bycatch quotas (IBQs) for Pacific halibut, a prohibited species.
For many fishermen participating in the bottom trawl components of
this fishery, bycatch of Pacific halibut can be a concern because limited
IBQ is available. Individual fishermen could reach their Pacific halibut
IBQ before reaching their catch share quota of other stocks, thereby
ending their fishing season or forcing them to purchase limited and
potentially expensive quota. In separate studies, we examined two
industry-designed Pacific halibut flexible sorting grid bycatch reduction
devices (BRDs): one developed for the Dover sole–thornyhead–sablefish
(DTS) complex fishery, and a second developed for the nearshore flatfish
fishery. For both BRDs, we used a recapture net to quantify fish escapement
and retention (by weight). For the BRD tested in the DTS fishery,
retention of marketable-sized Dover sole, shortspine thornyheads,
and sablefish was 99.0%, 96.9%, and 90.0% respectively. Pacific halibut
bycatch was reduced by 83.7%. In the nearshore flatfish fishery, the BRD
examined retained 85.1% of marketable-sized flatfishes encountered.
Retention was highest for petrale sole (93.3%), and Dover sole (89.4%).
Bycatch of Pacific halibut was reduced by 93.7%, while catches of
rockfishes and roundfishes were reduced by 72.1% and 96.5%, respectively.
Results demonstrated the capability of flexible sorting grids to modify
trawl selectivity in two US West Coast LE groundfish bottom trawl fisheries
while maintaining relatively high catch levels for several target
species.
URL1: The next link will exit from NWFSC web site http://doi.org/10.4027/fbgics.2015.01
Theme: Recovery and rebuilding of marine and coastal species
Official Citation:

Lomeli, M.J.M., and W.W. Wakefield. 2015. Testing of Pacific Halibut Bycatch Reduction Devices in Two US West Coast Bottom Trawl Fisheries. In: G.H. Kruse, H.C. An, J. DiCosimo, C.A. Eischens, G.S. Gislason, D.N. McBride, C.S. Rose, and C.E. Siddon (eds.), Fisheries Bycatch: Global Issues and Creative Solutions. Alaska Sea Grant, University of Alaska Fairbanks. http://doi.org/10.4027/fbgics.2015.01