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MetaData for Reducing Bycatch in Oregon's Recreational Groundfish Fishery: Experimental Results with Angling Gear Configured to Increase Bait Height Above Bottom, Information Reports 2008-03
Reducing Bycatch in Oregon's Recreational Groundfish Fishery: Experimental Results with Angling Gear Configured to Increase Bait Height Above Bottom, Information Reports 2008-03
Identification Information
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Citation
- Originator: Hannah, R., T. Buell, and M. Blume
- Publish Date: August 2008
- Online Link:
None
- BPA Project #:
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Contact Information
- Agency: Oregon Department of Fish and Wildlife
- Name: Cedric Cooney
- Job Position: Natural Resources Data and Systems Manager
- Telephone: 503-947-6094
- E-Mail Address: cedric.x.cooney@odfw.oregon.gov
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Description
- Abstract: Several long-lived, late-maturing rockfish (Sebastes) species found off the U.S. west
coast have been seriously depleted by overfishing and are managed under long-term
rebuilding plans that greatly restrict fishery impacts (PFMC 2006). Two of these species,
canary rockfish (Sebastes pinniger) and yelloweye rockfish (S. ruberrimus), are caught in
waters off Oregon and Washington as bycatch in recreational fisheries directed at black
rockfish (S. melanops), yellowtail rockfish (S. flavidus), lingcod (Ophiodon elongatus)
and Pacific halibut (Hippoglossus stenolepis). Recreational fishery impacts on the
depleted species are constrained primarily via seasonal restrictions on the maximum
depth of fishing, area closures and a ban on retention (PFMC 2006). However, needed
future reductions in allowable impacts on either species could lead to more severe fishery
restrictions, including bag limit reductions and seasonal or area closures (PFMC 2006).
If angling gears can be developed that capture the target species effectively but are
inefficient for these two bycatch species, then bag limit reductions or closures of the
recreational groundfish fishery could be avoided.
The nearshore recreational fishery targeting black and blue rockfish (Sebastes mystinus)
also captures several rockfish species which have not been the subject of formal stock
assessments. A few of these rockfish species are long-lived and considered to be more
vulnerable to overfishing than black rockfish. For example, china rockfish (Sebastes
nebulosus) live to at least age 78 and tiger rockfish (S. nigrocinctus) to at least age 116
(Munk 2001). Harvest strategies that are acceptable for black and blue rockfish may
result in overfishing of these sympatric rockfish species. Many of these unassessed, but
vulnerable, rockfish species are also species that are most closely associated with the
seafloor (Love et al. 2002). Conversely, many of the target species of the recreational
fishery are more semi-pelagic in their vertical distribution, in that they are frequently
found at some distance above the seafloor (Love et al. 2002). Gear-based methods that
maintain catch rates for semi-pelagic rockfishes but reduce rates for more demersally oriented
rockfish could therefore also be helpful in successful mixed-stock management
of nearshore fisheries. In this study, we tested the hypothesis that angling gear that keeps
baits farther above the bottom would reduce the relative catch rates of yelloweye, canary
and several demersal rockfishes, while maintaining acceptable catch rates for the semipelagic
rockfish species most commonly caught off Oregon. In this report, we use the
term “semi-pelagic” to specifically refer to black, blue, yellowtail, widow and redstripe
rockfish (S. proriger). We use the term “demersal” to refer to rockfishes that are
believed to live in close association with rocky substrate, specifically yelloweye, china
(S. nebulosus), quillback (S. maliger), greenstriped (S. elongatus) and rosethorn (S.
helvomaculatus) rockfishes.
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- Purpose:
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- Time Period of Content:
- Geographic Extent: Oregon and Washington Coast
- Status: Final
- Use Constraints:
- Format: PDF File
Data Quality Information
- Lineage-Source:
Data Information
- No data information was supplied.
Entity and Attribute Information
- Attributes Description: Field attribute information is available in the attached file(s).
Is a physical copy maintained for reference at Headquarters?
No
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2008-03.pdf
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3/23/2018 12:00:39 PM |
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