Species-

1
Species- Site-specific Impacts of Gas
Supersaturation on Aquatic Animals BPA Proposal
35013
Alec G. Maule USGS, Columbia River Research Lab
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Columbia River Spill Program

• Goal maximize non-turbine fish passage
• TDGS standard 110
• Spill program 115 FB, 120 TR
• OR, WA annual waivers
• Physical Biological monitoring

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Change TDGS standard?

• No apparent effect on juvenile salmon, TDGS lt
  120
• Resident fish?
• Other migratory fish?
• Adult salmon?
• Invertebrates?

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Resident fish?
Lake Rufus Woods (1999) TDGS lt 115
Longnose suckers
Species Number Rainbow trout 1028 Walleye
456 N. Pikeminnow 390 Redside shiner
688 Suckers (3 spp.) 2755
Largescale Bridgelip
97 96 95
Missing year-classes?
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Depth Behavior
Shallow-tank Exposures
LT50 (hrs)
(Time above 2 meters)
125 130
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LS Sucker Northern Pikeminnow LN Sucker RS
Shiner Walleye
Largescale sucker
2
Longnose sucker
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Bull trout (ESA-listed) Migratory behavior?
Co-PIs Matt Mesa, A. Maule
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White Sturgeon larva (Counihan et al.
1998) 131, LT50 13 days 118, 10 days - no
morts Positive buoyancy Altered behavior
Dispersal? Predation?
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Adult white sturgeon Feeding behavior in tailraces
Co-PI Mike Parsley
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Pacific lamprey (adults)
Co-PIs Jennifer Bayer Jim Seelye
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Ecological Cultural Importance of a Species at
Risk of Extinction, Pacific Lamprey. David
Close et al. July 2002
Pacific lamprey (larva)
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Adult Salmon (ESA-listed)
Single, acute TDGS lt 128 -- no effect on
reproduction of spring chinook salmon (Gale et
al. 2002)
Chronic or multiple acute exposures? Sockeye or
steelhead?
Co-PIs Matt Mesa, A. Maule
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Aquatic Invertebrates Pelagic Surface
drift Benthic (sessile) Water level fluctuation
Co-PI Tim Counihan
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Funded by
Species- Site-specific Impacts of Gas
Supersaturation on Aquatic Animals BPA Proposal
35013