Study Probes Why Chinook Salmon Are Trending Younger and Smaller

Apr 13, 2021

Computer modelling points to age specific ocean mortality as a reason chinook salmon returning to Alaska rivers are trending younger and smaller. As KUAC’s Dan Bross reports, a recently published study points to the loss of 3-year-old fish, and the possibility the larger chinook may be more targeted by salmon sharks and other marine predators.

A Chinook salmon is measured at a test fishery on the Yukon River.
Credit Kousei Martin Perales / University of Alaska Fairbanks