A new report by noted fish biologist Peter Moyle (a character in the documentary) is a frightening look at the future of California's trout, steelhead and salmon populations. Twenty one of thirty species may face extinction by the end of the century. The main reasons: dams, global warming and the lack of cool, clear water that the fish require to thrive.
Here's an excellent article in the SF Chronicle by Jane Kay.
Here's the link to the California Trout page on the report. Scroll down to the bottom to see the exec summary and the full report.
