“What you have is a scrambling of the schedule,” said William Deacy, a biologist at Oregon State University that studied the phenomenon.
“It’s essentially like if breakfast and lunch were served at same time and then there is nothing to eat until dinner.
“You have to choose between breakfast and lunch because you can only eat so much at a time.”
The study found that during the unusually warm summer of 2014, the bears, which would traditionally kill up to 75 percent of the salmon, were nowhere to be seen near the streams.
Instead, they were in the hills busy munching on berries, which contain less protein and therefore take less energy to break down, causing them to gain weight more quickly.