WASHINGTON — In Canada’s Fraser River, a mysterious illness has killed millions of Pacific salmon, and scientists have a new hypothesis about why: The wild salmon are suffering from viral infections similar to those linked to some forms of leukemia and lymphoma.
Now the salmon industry is in a state of collapse, with mortality rates ranging from 40 percent to 95 percent.
The salmon run has been highly variable: The worst year came in 2009, with 1.5 million salmon, followed by the best year in 2010, with 30 million salmon. But the overall trend is downward.
- Some populations of Fraser River salmon more likely to survive climate change: UBC study (eurekalert.org)
- Some Salmon Can Take the Heat (news.sciencemag.org)
- Oregon gets salmon season. (juneautek.wordpress.com)
- How Salmon Influence Plant Communities (naturalhistorywanderings.com)