In many areas, chum salmon enter streams in distinct seasonal runs (e.g., summer and fall). In Washington, spawning usually occurs in fall, October-December. In California, spawning has been observed from early August to early February. Spawning adults generally are 2-5 years old, sometimes up to seven years old. Adults die within about a week after spawning. Depending on water temperature, eggs hatch in several months, and the alevins complete yolk absorption within the gravel environment. Fry migrate directly to the sea soon after emergence, with a peak in April-May in Washington, spending relatively little time in fresh water.
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