‘Too hot’ for salmon: How climate change is contributing to the Yukon salmon collapse

Scientists know one thing for sure about the collapse of Yukon River king and chum salmon: there’s more than one culprit. “It’s really hard and probably unrealistic to just point your finger at one thing and say that’s what’s doing it,” said Jayde Ferguson, a fish pathologist with the Alaska Department of Fish and Game. Researchers have identified many threats facing Yukon king and chum salmon, and those threats pop up at each stage of the salmon life cycle — when salmon hatch in freshwater streams, as they swim down...