Puma and Cubs (IMAGE) University of California - Davis Caption A mountain lion keeps watch while her juvenile cubs feed at a bait sight. The mother, known to scientists as F92, is one of the two known offspring of the only male detected in the Santa Ana Mountains that genetically groups with lions east of Interstate 15. Busy highways and growing urbanization in the area threaten pumas in southern California and have led to their genetic decay, a UC Davis study found. Credit UC Davis Usage Restrictions Provide credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.