As salmon begin to stage for the autumn runs on the Great Lakes tributaries, see what scientists are saying about the social behavoirs of salmon. http://ift.tt/2adlffD

Scientists investigate social patterns of salmon
Each summer, millions of fish return to Bristol Bay, and then swim on to the stream where they were born to spawn, and die. Exactly what compels them to return to the right spot is unknown. But scientists think that some hatchery-raised steelhead in Oregon might hold a clue.
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