Grizzly bears move through landscapes, as many do, preferring smooth mountain slopes, gentle speeds to speed races, according to a remarkable new study by grizzlies, and how they compare their external life to ours.
The study, which included wild captive bears, specialized treadmills, apple pieces, and GPS trackers, expands our understanding of how the natural drive to save energy shapes animal behavior, including numbers, and may have consequences for health and weight management. : The findings also help explain why bears and humans cross paths so often in the open, giving useful reminders of desert planning and everyone’s safety.
Biologists և Other scientists in recent years have become more interested in how we և other creatures pass our way around us. And although some initial answers have begun to emerge as to why we choose to navigate and navigate as we do, the results are generally not particularly flattering.
Cumulative research suggests that we humans, as a species, are capable of being physically lazy to avoid strenuous activity. In a 2018 neurological study, for example, a brain scan revealed that volunteers were much more likely to be attracted to images of people in chairs and swings than people moving.
This obviously innate preference for movement made sense to us once upon a time, long ago, when hunting and gathering required a lot of effort, a lot of calories, and resting under a tree. Being passive is now more problematic with having food everywhere.
But it is unclear to what extent we share this tendency for physical ease with other species և whether these preferences affect how we և pass them through the world.
So designate grizzlies, especially those that live in the Bear Center at Washington State University, the nation’s primary brown bear conservation: research center. University biologists at the center study how animals live, eat and interact with humans.
Now, for a new study recently published in the Journal of Experimental Biology, they decided to study exactly how much energy grays expend when they move in different directions, and how these comparable numbers affect real-life behavior, not just bears. , but from us և other animals.
To begin with, they built a solid fence for the poles that were originally built around the track. As a result of the changes, it could rise or fall by up to 20 percent while at the same time weighing as much as gray. In front of the fence, the scientists added a feeding box with a built-in rubber glove.
They then taught the nine female grizzlies at the center, most of whom had settled down since birth – sports names such as John On, Pecan, Frank, climbing the racetrack, and walking at the same time accepting a piece of hot dog as an apple. ,
“The grizzlies feed a lot,” said Anthony Carnahan, a doctoral candidate at Washington State University who led the new study.
By measuring changes in the composition of the air in the shell, the researchers were able to track the energy expenditure of each bear at different speeds as they walked up and down. (Bears have never run on racetracks for safety reasons). Using these data, the researchers found that the most effective rate for bears, physiologically, was about 2.6 miles per hour when they used the least oxygen.
Finally, the researchers collected available data on the movement of wild bears using GPS statistics of gray bears in Yellowstone National Park, as they mapped the data – comparative figures from previous studies of humans and other animals roaming the natural landscapes.
Comparing the data, scientists have found that wild greyhounds, like us, seem to be born lazy. The researchers expected the wild bears to move at their most efficient speeds if possible, said Mr Carnahan. In fact, their average speed through Yellowstone was sluggish, 1, 1.4 miles per hour physiologically inefficient.
They also almost always chose the least steep route to get anywhere, even when it took extra time. “They did a lot of side heelings,” says Mr Carnahan.
Interestingly, these speeds and routes were similar to those of people who chose places with wildlife, the researchers note.
In general, the findings suggest that the innate urge to avoid overload plays a larger role in how all large and small creatures usually behave and navigate than we could have imagined.
The study does not rule out, however, that gray bears, like other bears, can move at a sudden, shocking speed or with violence when they decide to do so, says Mr Carnahan. “I saw a bear running through a mountain meadow for six or seven minutes when it came to me all afternoon,” he says.
The results also do not tell us that we humans are always destined to walk slowly, to stay in the flats, but only that it may require both mental and physical effort to aim to avoid the easiest routes.
Finally, the study is a reinforcing reminder that we share outside with large peak predators that can naturally choose the same paths as us. Useful information about staying safe in a gray country can be found on the website of the Interagency Grizzly Bear Committee.