Tag Archives: Survivor: Salmon Edition
Survivor: Salmon Edition
In 2020, COSEWIC designated seven chinook populations in southern British Columbia as either endangered or threatened. Much the same is true in the Columbia River watershed in the northwestern United States, where chinook populations may have lost more than one-third of their genetic diversity. More worrying still, the rate of young salmon returning as adults to rivers from California to Alaska over the past half-century has plummeted to one-third of earlier levels. It’s a picture that puzzles many researchers. A myriad of variables impact salmon survival and it takes time and research to untangle them. Land use, from mining to damming and irrigation, for example, has affected chinook stocks in the Pacific Northwest at critical life stages, but it can’t be blamed for what’s happening in the northern latitudes. >click to read< 09:05
