Science Spotlights

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No ‘smoking gun’ for Alaskan Chinook declines

No ‘smoking gun’ for Alaskan Chinook declines

A new study has challenged the view that the past decade of declines in the productivity of Alaskan Chinook salmon populations has been driven primarily by adverse conditions within their shared marine environment…

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Habitat refuges crucial in streams with low summer flows

Habitat refuges crucial in streams with low summer flows

Although human-driven changes in environmental conditions pose a threat to all of California’s remaining salmon runs, stocks that return to and reproduce in intermittent streams – those that flow only during the rainy months of the year – may be at particular risk…

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Human disturbances altering sockeye life-history

Human disturbances altering sockeye life-history

Analysis of long-term datasets on the ages and sizes of sockeye salmon from Alaska’s Bristol Bay reveals changes in juvenile development and seaward migration timing, due to increased freshwater prey abundance triggered by climate warming…

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Shifting habitat mosaics stabilize salmon production

Shifting habitat mosaics stabilize salmon production

Variation in how habitats respond to changing environmental regimes influences the locations within river basins where fish production is highest from year to year, which affects fisheries yields, management strategies, and conservation efforts…

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Human impacts driving loss of spring-run Chinook

Human impacts driving loss of spring-run Chinook

Chinook salmon exhibit “spring-run” or “fall-run” migration timing in many parts of their range, which permits spawning during different periods of the year to minimize the risk of adverse conditions or facilitate access to spawning grounds…

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