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Humans directly caused more than half the known deaths of mountain lions in Southern California, a 13-year study by UC Davis confirms. (UC Davis/photo)
The biggest threat to Southern California mountain lions is us, confirms a comprehensive 13-year study of the population’s mortality and survival from the University of California, Davis. The study, published in the journal PLOS ONE, combined genetic and demographic data to determine that even though hunting mountain lions is prohibited in California, humans caused more than half the known deaths of mountain lions studied.