Scientists found out that interaction with a person reduces the threat from predators for animals, which are contained in captivity or inhabit the urban environment. Through people, they get used to safe life and lose the ability to defend or hide from enemies.
© Piet Fotograaf
An International Group of Scientists Analyzed The Results of 173 Reviewed Studies Studying The Ability to Confront Predators in 102 Species of Animals That Are Constantly In Contact With People. The Team Divided Them Into Three Categories – Domesticated, Contained in Captivity and Living in The Urban Environment Of Protective Mechanisms Proceeds in Each of the Groups. The Results SHOWED THAT DUE TO FREQUENT CONTACTS WITH PEOPLE, ANIMALS BEGIN TO FEEL SAFE AND CEASE TO BE AFRAID OF PREDATORS OR ESCAPE FROM, AS IN WILDLIFE. Details of the Study Published in Plos Biology Magazine.
Scientists Found Out That Human Influence Reduces Risks From Predators. For Domesticated and In Captivity, Animal Threat IS Significantly Reduced Or Disappears AT ALL, AND EVEN JUST LIFE IN THE URBAN ENVIRONMENT WEAKENS THE PESSURE ON SOME SPECIES, ALTHOUGH IT IS ASSUMED THAT IN THIS CASE THE IMPACT OF MAN IS MINIMAL. In Response to New, Safer Conditions, Animals Change Their Behavior Model. At The Same Time, The Loss of The Ability to Escape From Predators in Animals Living In The Urban Environment Occurs Three Times More Slowly than At Home, And The Content in Captivity Leads to the Slowest Change. In addition, Herbivores and Omnivorous Domesticated Animals Got Used to a New Environment Much Faster Than Carnivores, And Loners Faster Than Herd.
Scientists NOTED THAT SUCH BEHAVIOR CAN CAUSE PROBLEMS WHEN SPECIES, FOR A LONG TIME IN CONTACT WILDLIFE. Many of Them Cease to React to the Threat From Other Species and Are Waiting For A Person and This Eventually LEADS TO THEIR DEATH.
INDITION, IT TURNED OUT THAT SIMULTANEOUSLY WITH THE LOSS OF PROTECTIVE MECHANISMS IN INDIVIDUALS INCREASED THE SPEED OF HEREDITARY CHANGES – IT GRADUALLY DECREASED WITH GENERATIONS. As the authors suggested, this is because the influence of natural selection in a safe environment has decreased, but with him the quick artificial selection began – this was especially affected by the evolution of domesticated species.
Biologists believe that to understand how human intervention changes the behavior of animals, it is necessary to preserve species – especially those that multiply in captivity, but then return to the natural habitat – as well as animal husbandry and urban planning. Dr. Benjamin Daffraua, Head of the study, added that scientists need more data to find out how contact with a person affects each individual and whether there is any value for them just the presence of tourists.