Calif. aims to rid lake of northern pike (AP)

A dead Northern pike is seem floating along the shore of Lake Davis, near  Portola, Calif., Tuesday, Sept. 25, 2007.  In an effort to eradicate an invasive pike species, the California Department of Fish and Game began applying thousands of gallons of  the fish poison Rotenone Tuesday in Lake Davis.  (AP Photo/Rich Pedroncelli)AP - State workers on Tuesday began pouring a toxic chemical into a lake nestled in the mountains of the Sierra Nevada as part of California's decade-long effort to exterminate a predatory northern pike.