Ben Walczak - Sandy River Watershed Council...2019/03/18 · Lower Columbia ESU Clackamas Sandy...
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Sandy Basin Update Ben Walczak Assistant District Fish Biologist Oregon Department of Fish and Wildlife
Transcript of Ben Walczak - Sandy River Watershed Council...2019/03/18 · Lower Columbia ESU Clackamas Sandy...
Sandy Basin Update
Ben WalczakAssistant District Fish Biologist
Oregon Department of Fish and Wildlife
Coho
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10000
15000
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25000
2013 2014 2015 2016 2017 2018 (prelim.)
Estimates of wild adult Coho spawner abundance 2013 - 2018
Lower Columbia ESU Clackamas Sandy
3,897
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5,000
10,000
15,000
20,000
25,000
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Wild Adult Coho Spawner Abundance Estimates in the Lower Columbia ESU, 2002 - 2018Note: 2018 estimate is preliminary
Avgs.
71,129
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
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Wild Adult Coho Spawner Abundance Estimates in the Oregon Coast ESU, 1990 - 2018Note: 2018 estimate is preliminary
10yr Avgs.
Winter Steelhead Broodstock
Program
Background
2000-2002. Conversion from out-of-basin stock to in-basin stock occurs. Winter steelhead were collected from Marmot Trap and spawned.
2003-2007. Winter steelhead were collected from Marmot Trap and integrated with fish returning to Sandy Hatchery.
2008-2011. Post Marmot Dam removal. Winter steelhead are collected in the lower Sandy River by anglers and integrated with fish returning to Sandy Hatchery.
2012-2017. Litigation pauses integration. Fish returning to Sandy Hatchery are spawned.
2018 -2019. Winter steelhead are collected in the lower Sandy River by anglers and integrated with fish returning to Sandy Hatchery.
Current Winter Steelhead
Broodstock Program
Angler caught (Late December – Early March).
Transported and held at Sandy Hatchery.
Spawned (March).
Reared and released at Sandy Hatchery (following April).
Spring Chinook Program
BACKGROUND
In the fall of 2010, a lawsuit against the Sandy Hatchery Spring Chinook program occurred in response to the interaction of stray hatchery origin spring Chinook and wild spring Chinook.
In the late winter of 2011, an acclimation pond was constructed at the old Bull Run Powerhouse to provide returning hatchery adults with enough attraction flow that they would not have to wait for adequate flows in Cedar Creek and eventually begin to stray away from their release site. All spring Chinook smolts are now acclimated at this facility.
In August 2011, rigid weirs were placed on the Salmon and Zigzag Rivers in an attempt to remove hatchery origin spring Chinook from the upper basin.
In July 2013, a resistance board weir and trap was constructed and placed just upstream from the mouth of the Bull Run River, located in Dodge Park, to collect broodstock and remove hatchery origin spring Chinook from the basin that were acclimated at the old Bull Run Powerhouse facility.
Current Spring Chinook Program
No plans to deploy upper basin weirs.
Install Bull Run weir when flows subside (early June).
Monitor spring Chinook in the middle river with snorkel surveys (June
– August).
Collect and hold wild fish for integration (August – early September).
Spawn (early – mid September).
Increase smolt releases from 132,000 to 200,000 (February – March).
