Pumas are quietly tracking your hiking and biking habits better than you think. (Anthropocene Magazine)
Excerpt from this story from Anthropocene Magazine:
What can land managers do when they oversee a place that is both home to dozens of mountain lions and a destination for tens of thousands of people drawn to picturesque trails?
For starters, they might want to keep people on more heavily-traveled routes and resist the impulse to kill lions that appear habituated to nearby humans. Those are some of the insights that emerged from research tracking mountain lions in Californiaâs Santa Cruz Mountains.
âThe long assumption here in the U.S. and beyond has been that habituation equals dangerous, with the result that wildlife agencies generally kill any carnivore they think is becoming habituated,â said Mark Elbroch, of the conservation group Panthera, a co-author of a new paper in Current Biology. âThere may be a spectrum of habituation that is in fact supporting peaceful coexistence between people and these amazing animals.â
The Santa Cruz Mountains separate Californiaâs Pacific Coast from millions of people who live in the Silicon Valley and the broader San Francisco Bay area, making it a popular playground for people seeking to get outdoors. At the same time, itâs home to fewer than 100 adult mountain lions. The California Fish and Game Commission recently voted to protect the cats there, and in other parts of central and southern California, under the stateâs Endangered Species Act. Mountain lions in this populous state must navigate a minefield of car traffic, sprawling subdivisions, bright lights and other hazards.
To better understand how humans and cats are interacting in the Santa Cruz Mountains, the Midpeninsula Regional Open Space District, which manages 28,000 hectares of mountain land visited by some 2.5 million people a year, enlisted a group of scientists.
The researchers delved into data tracking the movements of both mountain lions and people to get a detailed look at how the two are overlapping. For the cats, the scientists had six years of data from radio collars attached to 36 adults. For the humans, there was information acquired from Strava, a workout tracking app popular with outdoor recreationists.
The analysis revealed that much of the time, mountain lions are effectively self-policing by avoiding trails and other places with lots of human traffic. Â
âThey know which trails are used, when, and how much, and they avoid places that are consistently busy, rather than just reactively getting out of there when someone comes down the trail,â said Chris Wilmers, an ecologist at the University of California, Santa Cruz Environmental Studies Professor and leader of the Santa Cruz Puma Project, a program for mountain lion research in the area.
While the cats typically keep their distance, the analysis did reveal that some cats appear more comfortable in closer proximity to people. Those were animals that already spent more time in habitat with a lot of humans running, hiking and biking nearby. Itâs possible, the scientists suggest, that these cats have learned that they can get a bit closer to people â within 30 meters â without getting into trouble.
That might set off alarm bells among people who think that as mountain lions get closer to people, they are more likely to attack. But thatâs not what scientists found. When they ran computer simulations of different patterns of cat behavior and compared it to where people had encounters with cats (ranging from sightings to attacks), the more habituated cat behavior didnât correlate with more encounters.