For more than 15 000 years ago, some wolves live together with people. They developed into dogs and became our very first pets.
So far can all be in agreement. Extensive research is underway, both archaeological and genetic, to clear out the remaining contentious issues. Developed the wolf to the dog much earlier, already up to 30 000 years ago? It took place at one location, and low the place in this case in western Europe or in east Asia? Or developed wolves to dogs in several different places in parallel?
And most interesting, why took we the dog?
why the dogs chose us. We provided food.
of Course, there were advantages for the traditional hunters and farmers to keep the dog.
In jägarsamhällen several thousand years ago, the dogs help in the hunt, guard, help with the heat of the night, and assist in the transport.
When we became farmers also introduced the dog's ability to herd sheep and cows.
But even many modern-day people in urban areas, who neither hunt or have a flock to herd, choose voluntarily to step up in the svinottan every single day – even in the rain and bad weather – to walk their dogs. As dog owners, they take on a considerable responsibility for perhaps fifteen years forward in time.
Usually it depends on the dog's function as a companion.
the Fact is that there are scientific results showing that dog owners on average are more persistent and feel less alone – an effect that is seen most clearly in the single.
On the other hand, have the dog a little different personality. At least compared to cat owners is, on average, friendlier and more conscientious – personality traits which in themselves correlate with better health and longer life.
It is difficult to bone out what is cause and effect, what is environmental factors and genetic predisposition. Therefore, there is about twin research.
over the twins. In addition, we have mandatory registration of hundägande.
It has Tove Cases, a professor of molecular epidemiology at Uppsala university, has taken on. She and her co-author will publish in the week, a study in the journal Scientific Reports about the twins and hundägande.
the Point about twin research is that there is a genetic difference on identical twins, born with basically one hundred percent identical dna, and fraternal twins, like ordinary siblings, share approximately fifty percent of their dna.
at the same time, parts of the twins, regardless of whether they are enäggs or fraternal, same barndomsmiljö.
Tove Cases and her colleagues have looked at 85.000 twins, and based on their propensity to stay with the dog in the ages between 20 and 75 years.
in the childhood home has some effect, it turns out. But the effect is limited, and shows itself only in young adults. Later in life sounds barndomshemmets importance of.
According to the study's outcome is due to the choice to get a dog in large part due to innate, genetic factors. Some people are born simply with a personality that makes them more likely to stay with the dog.
Then there arises, of course, the question of what it is for personality traits, and if they have become more frequent in the last 15 000 years.
we began to live with the cows eventually led to that it became common to tolerate lactose.
Both the appearance and mental characteristics differ greatly between a wolf and a Golden Retriever (most common brief historical summary in the study after the ”mongrel”). Perhaps we have also been living with dogs for thousands of years. Something to bite into for future research.
Here you can read more vetenskapskrönikor by Karin Bojs, for example, if the nonsense that surrounds the issue of biological diversity.