Northwest coastal tribes have counted on salmon and herring for thousands of years to fill their nets and fuel their cultures. That could change in just a few decades as warmer waters drive fish north, according to a study out this week from the University of British Columbia.

Researchers looked at 98 species that native, or First Nations, communities catch on the B.C. coast.

"What we find is that most of the species will have a decrease in potential catch and abundance by 2050," said UBC professor William Cheung.

The study focused on tribal fisheries. Some tribes could see their fish catches drop in half as the climate keeps changing.

"First Nation communities and First Nation fisheries are more susceptible to climate change impacts," Cheung said.