They are river-type chinook. As I said, because of their long migrations—these fish migrate over 2,000 kilometres upstream—they do spend time in fresh water rearing as juveniles before making it to the ocean, so they're considered 1+ or river-type chinook. Where they rear is variable, and because of the length of the Yukon River, it's not easy to pinpoint important rearing habitats for these salmon. They have a lot of area that they can use within the main stem of the Yukon.
On February 15th, 2024. See this statement in context.