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Rat Poison Detected in Dead Mountain Lion

Necropsy results from the mountain lion found dead by hikers last month in the Santa Monica Mountains are inconclusive, but show exposure to rodenticide.

Traces of rodenticide were found in a mountain lion found dead by hikers in western Malibu, but the cause of death has not been determined.

A necropsy was performed on the partially decomposed remains of the year-old lion, who was known as Puma-25. She had been traveling with her brother and mother in Point Mugu State Park.

“Unfortunately we’ll never know exactly why this animal died,” said Dr. Seth Riley, an expert on urban wildlife with Santa Monica Mountains National Recreation Area (SMMNRA). “Mountain lions in this region face a number of challenges to survive and rodenticide exposure is certainly a common – and entirely preventable – health risk for local wildlife.”

Laboratory tests conducted by the California Animal Health and Food Safety
Laboratory and the University of California at Davis discovered low levels of exposure to two anticoagulants commonly found in rodenticides.  

Anticoagulants lead to uncontrolled bleeding and have been confirmed as the cause of death for two other mountain lions in the Santa Monica Mountains, Riley said. 

The death did not appear to be the result of a conflict with another lion,
which is the common cause of death for most lions, from lack of nutrition or plague.

P-25 was one of 26 lions being studied by National Park Service biologists.

Susan Tellem November 29, 2012 at 11:10 PM
Pathetic - why would you put out rat poison? If you must, use traps. Also rats and mice do not like mothballs. Try it, it works - you can get the hangers of mothballs at CVS.
Robert Coutts November 30, 2012 at 03:28 PM
Rodenticides are the cause of death of many predators in the Santa Monica Mountains, owls, coyotes and Bob cats as well as mountain lions. The artificial chemicals used to kill dying rats they eat, stay in their bodies and accumulate in the bodies of predators who eat them. The more the predator eats, the more Coumadin or warfarin they get. Two lions were found on the edge of the 118 freeway, bleeding to death from mange, a disease found to be commonly associated with ingestion of too much rat poison.
steve dunn November 30, 2012 at 04:49 PM
Robert Coutts is absolutely correct !! Use traps not poison. When using poison you kill more than just the darn rats... after you catch a rat with a trap rinse trap with bleach because rats excrete a hormone on the trap that other rats can detect and will stay away .. these poisons used dehydrate and cause internal bleeding it is a very painful and slow death....
Doug December 01, 2012 at 01:45 AM
probably someone was trying to kill gophers on the side of his house

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