The fish aren't spending as long in the ocean as they used to before returning to spawn
(Newser) -
It won't be a revelation to locals, but researchers have determined that Alaska salmon are shrinking. For example, Chinook salmon are 8% smaller today than they were before 1990, say researchers in Nature Communications . Sockeye, coho, and chum salmon have also shrunk, though to a lesser extent, reports Reuters...