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Increasing water temperatures from changing climate and their effects on the survival of adult sockeye salmon, (Oncorhynchus nerka) on Snake River in the Columbia Basin
Increasing water temperatures from changing climate and their effects on the survival of adult sockeye salmon, (Oncorhynchus nerka) on Snake River in the Columbia Basin
As a consequence of climate change, many populations of sockeye salmon in the U. S. Pacific Northwest are now experiencing significantly warmer river conditions during their spawning migration from the ocean to their freshwater spawning grounds compared to the 30 year average. The Columbia River witnessed an extended heat wave in 2015 and low flows pushed water temperatures to 21° C, which ended up killing 90 percent of the adult sockeye salmon returning to spawn in their natal streams in the summer months. Fish passage delays at hydro-electric dams potentially compounded this effect. The purpose of this study was to determine if water temperatures had a delay effect on run-timing and potential returning sockeye salmon population mortality in the Snake River in the Columbia Basin. Run timing and delays in migration patterns were examined over the years 2014-2018 in order to notice any trends in migration patterns. Results indicated that, as water temperatures increased, so did the travel time of returning adult sockeye salmon migrating between Bonneville Dam and Lower Granite Dam. Increased water temperatures were associated with migration delays, increasing them by as much as ten days more than the average in some years. Qualitative observations of fish vigor on migrating fish through fish windows also yielded signs of fungal disease on a small number of sockeye salmon during warmer water temperature outbreaks.
- Vancouver Island University Canada
Sockeye salmon, Columbia River, Water temperatures, Climate change, Fraser River, Snake River
Sockeye salmon, Columbia River, Water temperatures, Climate change, Fraser River, Snake River
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Washington. (2019). Columbia Basin Conditions. Adapted from: http://www.cbr.washington.edu/dart/query/basin_conditions
Columbia River DART, Columbia Basin Research, University of Washington. (2019). Columbia Basin Performance Measures. Adapted from: http://www.cbr.washington.edu/perform/perform.php
Columbia Basin Research (2018). Columbia River DART. Retrieved from: http://www.cbr.washington.edu/dart EFFECTS OF CLIMATE CHANGE IN SOCKEYE SALMON ON SNAKE RIVER
Eliason, E. J., Clark, T.D., Hague, M.J., Hanson, L.M., Gallagher, Z.S., Jeffries, K.M., Gale, M.K., Patterson, D.A., Hinch, S.G., Farrell, A.P. (April, 2011). Differences in thermal tolerance among sockeye salmon populations. Science, (332) 109-112.
Environment Agency, (2015, June). Fungus on Salmon and Sea Trout. Environment Agency. [PDF File] Retrieved from: http://www.gethooked.co.uk/sites/default/files/fungal-infections-in-salmonids-2015.pdf
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Popularity provided by BIP!- Vancouver Island University Canada
As a consequence of climate change, many populations of sockeye salmon in the U. S. Pacific Northwest are now experiencing significantly warmer river conditions during their spawning migration from the ocean to their freshwater spawning grounds compared to the 30 year average. The Columbia River witnessed an extended heat wave in 2015 and low flows pushed water temperatures to 21° C, which ended up killing 90 percent of the adult sockeye salmon returning to spawn in their natal streams in the summer months. Fish passage delays at hydro-electric dams potentially compounded this effect. The purpose of this study was to determine if water temperatures had a delay effect on run-timing and potential returning sockeye salmon population mortality in the Snake River in the Columbia Basin. Run timing and delays in migration patterns were examined over the years 2014-2018 in order to notice any trends in migration patterns. Results indicated that, as water temperatures increased, so did the travel time of returning adult sockeye salmon migrating between Bonneville Dam and Lower Granite Dam. Increased water temperatures were associated with migration delays, increasing them by as much as ten days more than the average in some years. Qualitative observations of fish vigor on migrating fish through fish windows also yielded signs of fungal disease on a small number of sockeye salmon during warmer water temperature outbreaks.