From bottom to top, a jack sockeye salmon, which has spent one year at sea, a sockeye that has spent two years at sea, and a sockeye that has spent three years at sea, as seen in Bristol Bay’s Wood River watershed in August 2018. (Mary Catharine Martin | SalmonState)

From bottom to top, a jack sockeye salmon, which has spent one year at sea, a sockeye that has spent two years at sea, and a sockeye that has spent three years at sea, as seen in Bristol Bay’s Wood River watershed in August 2018. (Mary Catharine Martin | SalmonState)

Short-lived salmon play a role in long-term survival

Jacks are an important part of most, if not all, sockeye runs.

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