PDF

Migration Depths Of Adult Chinook Salmon And Steelhead In The Lower Columbia And Snake Rivers In Relation To Dissolved Gas Exposure, 2002 Item Info

Title:
Migration Depths Of Adult Chinook Salmon And Steelhead In The Lower Columbia And Snake Rivers In Relation To Dissolved Gas Exposure, 2002
Report Type:
Technical Report
Date:
2008
Authors:
Johnson, E.L.; Clabough, T.S.; Peery, C.A.; Bjornn, T.C.; Stuehrenberg, L.C.
Affiliations:
Fish and Wildlife Sciences, University of Idaho; National Marine Fisheries Service, National Oceanic and Atmospheric Administration
Report Number:
2008-2
Publisher:
University of Idaho
Funder:
U.S. Army Corps of Engineers, Portland District; U.S. Army Corps of Engineers, Walla Walla District
Abstract:
High spill volume at dams can create supersaturated dissolved gas conditions that may have negative effects on fishes. During 2002, 184 adult Chinook salmon Oncorhynchus tshawytscha and 231 steelhead Oncorhynchus mykiss were tagged at Bonneville Dam with archival radio-data storage transmitters (RDSTs) that recorded depth and water temperature as they migrated through dams and reservoirs of the lower Columbia and Snake rivers. These data were used to estimate the degree of exposure to gas supersaturated conditions. Migration depth plays a role in the development of gas bubble disease because hydrostatic compensation reduces the effects of exposure to supersaturation at greater depths. We found that adult spring and summer Chinook salmon and steelhead spent a majority of their time at depths deeper than 2 m (providing at least 20% hydrostatic compensation). However, migration depths below 2 m were interspersed with periods lasting several minutes at depths shallower than 2 m. Statistical associations were weak between dissolved gas concentrations and the percent and duration of time fish occupied near-surface waters. Based on the observed migration depths and dissolved gas conditions in the river, biological effects resulting from depth uncompensated exposure to dissolved gas were likely minimal in 2002.
Species:
Steelhead, Oncorhynchus mykiss Chinook salmon, Oncorhynchus tshawytscha
Location:
Bonneville Dam; Columbia River; Snake River; Lower Granite Dam; Dodson Oregon; Skamania Washington
Subjects:
salmonids Federal Columbia River Power System FCPRS radiotelemetry dissolved gas concentrations migration depth fish physiology gas bubble disease
Source:
University of Idaho, Fish Ecology Research Lab
Original Filename:
2008-02-CK-SH-depths-in-relation-to-dissolved-gas-lower-Columbia-River-2002.pdf
Format:
application/pdf

Contact us about this record

Source
Preferred Citation:
"Migration Depths Of Adult Chinook Salmon And Steelhead In The Lower Columbia And Snake Rivers In Relation To Dissolved Gas Exposure, 2002", Adult Salmon and Steelhead Migration Studies: 1996-2014, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/ferl/items/ferl-tr-2008-2.html
Rights
Rights:
These files are provided for research purposes with copyright held by the original authors. Please contact the publishing organization for more information about rights.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/