Scientists said Wednesday that they had found the oldest body of their dog over 10,000 years ago in the Americas, suggesting that the animals accompanied the first wave of human settlers.
Humans are believed to have migrated from Siberia to North America at the end of the last ice age, beyond the current Bering Strait 30,000 to 11,000 years ago.
The history of dogs has long been intertwined with humans, and studying dog DNA can provide a good timeline for human settlement.
A new study led by the University of Buffalo analyzed the mitochondrial DNA of bone fragments found in southeastern Alaska.
The team initially thought the fragment belonged to a bear.
However, upon closer examination, it is part of the femur of dogs that lived in the area about 10 or 150 years ago, and the American dogs and genetic lineages that lived before the arrival of European breeds. It became clear that they were sharing.
“Because dogs are a substitute for the human profession, our data helps provide not only timing, but also a place for dogs and people to enter the Americas,” said Buffalo University and University Evolutionary Biologist. Said Charlotte Lindkvist. South Dakota.
She said the findings, published in the Royal Society Bulletin B, support the theory that humans arrived in North America from Siberia.
“Southeast Alaska may have acted as some sort of ice-free stop, and now the early human migration through the area with our dogs is more than previously suspected. I think it’s much more important, “said Lindkvist.
Carbon isotope analysis of bone fragments showed that ancient Southeast Alaskan dogs were likely to have a marine diet consisting of fish and scraps of seals and whales.
Lindqvist said the dogs did not arrive in North America all at once. While Siberian Husky was imported into Alaska during the 19th century gold rush, some later arrived from East Asia with the Thules.
There has been long-standing controversy as to whether the first humans entered North America through a continental corridor formed as the ice sheet receded, or along the North Pacific coast thousands of years ago.
Earlier estimates of the dog’s wreckage are younger than the fragments found by Lindqvist and the team, suggesting that the dog arrived on the continent during later continental drift.
Lindqvist said her findings support the theory that dogs actually arrived in North America during the first wave of human settlers.
“There is also evidence that the coastal edges of the ice sheet began to melt at least about 17,000 years ago, while the inland corridors couldn’t run until about 13,000 years ago,” she told AFP. Told.
“And genetic evidence that the first American coastal route over 16,000 years ago is most likely. Our study shows that our coastal dogs are the offspring of dogs that participated in this first migration. I support that. “
Dogs Came To N. America With Earliest Humans: Study Source link Dogs Came To N. America With Earliest Humans: Study