Infographic showing Pacific salmon premature mortality and spawning success in Alaska
By Alaska Science Center
2019 (approx.)
Detailed Description
Infographic showing water temperature and discharge (flow) data from rivers with heat-related salmon mortality, drought-related salmon mortality, and normal salmon survival in Alaska during 2019. Figure from the article "Premature Mortality Observations among Alaska’s Pacific Salmon During Record Heat and Drought in 2019".
Sources/Usage
Public Domain.
Figure design and illustration by Cecil Howell.
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Heat stress in Alaska's Pacific salmon
Alaska's freshwater spans a wide range of summer water temperatures, from ice-cold glacier water to warm rivers that routinely reach stressful levels for salmon, exceeding 18°C/64°F and even surpassing 21°C/70°F. Pacific salmon population trends are also varied and include declines in many Chinook salmon populations. Salmon declines are kitchen table issues because salmon fishing is key to the...
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