Alaska fishermen bewildered, alarmed at loss of king salmon

There’s an unsolved fish mystery playing out right now along a rugged, 300-mile stretch of Southeast Alaska coastline: What’s killing off the thousands of king salmon that, at an increasing rate, swim out to sea and don’t return to spawn? “There’s a big ocean out there,” said Tad Fujioka, a commercial fisherman in Sitka. “And it’s kind of a black box.” Alaska fishermen and scientists don’t know what, exactly, is causing king salmon returns to plummet across Southeast. But they’re trying to adapt to the consequences: closures for certain fisheries and new limits on catches,,, click here to read the story 10:20