FILE - This Oct. 19, 1994 file photo shows two sockeye salmon at the mouth of the Adams River at the Roderick Haig-Brown Provincial Park in British Columbia, Canada. Scientists working with sockeye salmon struggling to cope with warming temperatures in British Columbia's Fraser River have identified broad genetic traits that can predict which fish will live or die before spawning a new generation. The study was published in this week's edition of the journal Science. (AP Photo/Gary Stewart, File)