Science & Technology

Carnivores may adjust their schedule to avoid each other, researchers find

Carnivorous mammals get in the way to avoid other species, much like humans leave home five minutes early to avoid talkative neighbors or leave work late to avoid rude colleagues. May not be. But they aren’t trying to navigate the nasty social interactions. Rather, they are negotiating space and resources to survive.

Researchers have used 73 infrared trigger sensor cameras installed at three sites in Sabah, Malaysia, on Borneo, the third largest island in the world, to perform this temporary niche split over a six-year period. I monitored it intermittently. International cooperation announced on October 6 what they mean for their findings and the mechanism of coexistence between competing mammals. Science report..

“Approximately 20% of the world’s mammal species are at risk of extinction, primarily due to threats such as habitat loss and overfishing,” said the lead author. Miyabi Nakabayashi,Assistant professor Graduate School of Advanced Science and Engineering, Hiroshima University At Hiroshima University. “The situation of mammals in the Oriental region, one of the eight biogeographic regions of the globe, covering much of South and Southeast Asia, is one of the worst in the world.”

According to Nakabayashi, one of the major obstacles to effective and practical solutions to reduce the proportion of endangered species is the lack of basic ecological information about mammals in the Oriental region.

“Information on the temporal activity patterns of animals is important to assess their response to human disability and to enable the implementation of appropriate safeguards,” said Nakabayashi. “Camera traps are one of the most useful techniques for studying mysterious and rare animals.”

The researchers have collected 37,379 photos over a total of about three years. The first camera was installed in 2010 and the last camera was removed in 2016, but logistics problems such as bad weather and insect nesting have occurred for quite some time and the cameras have stopped working for a long time. ..

In the dataset, researchers identified nine different carnivorous species with sample sizes greater than 10 and categorized their activity patterns by time zone. Of the species, 6 were active at night, 2 were active during the day, and 1 was active at any time.

Some of the more closely related animals showed clear temporal separation, including two wild cats. One of them was nocturnal and the other liked the day. However, researchers also found that all three civets were active at night. This may be due to limited competition for resources as all three eat a variety of foods.

Researchers have also discovered that tourism can affect the behavior of mammals. During the survey period, tourism activities (mainly non-lethal ecotourism events) were conducted at all survey sites. However, only one site hosted nocturnal tourism activities. Common palm civets in the other two locations had two distinct temporal activity peaks at night, while the same species of nocturnal tourist destinations were unclear and delayed in temporal movement. ..

“Potential benefits of ecotourism may include mitigating threats to wildlife,” said Nakabayashi, who said community-based ecotourism is of interest to local communities and policy makers. He said it could bring significant benefits such as alternative income that encourages the protection of local species. “But our results show that the temporal activity patterns of species can be directly affected by tourism. Even if it is non-lethal ecotourism, it is against animal behavior. The impact of tourism needs to be assessed. “

The researchers also recommended a 2-3 year study using at least 10 cameras to collect more data on carnivore activity.

“Current information is limited and sporadic, so we do not understand the basic behavior of mammals. This can affect the assessment and progress of improvement of threat conditions,” says Nakabayashi. Mr. says. “We need to accumulate more information about rare species, determine their basic ecology, and reassess whether current conservation and management strategies are appropriate.”

Carnivores may adjust their schedule to avoid each other, researchers find Carnivores may adjust their schedule to avoid each other, researchers find

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