One of California’s last great salmon runs tallied a perilously low number of surviving offspring in 2015, scientists said Monday, marking a second year of drought-driven problems for the Sacramento River chinook, which loom on the verge of extinction.
The National Oceanic and Atmospheric Administration’s Fisheries Servicereported that just 3 percent of the run’s juvenile salmon survived their historic migration to sea, again dying in large numbers because the river was simply too shallow and too warm to tolerate…
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