Discovering the Oldest Known Dog: Unraveling the Genetic History of Our Canine Companions

Ancient Evidence of Dog Care in Punarbashi, Turkey, dating back 15,800 years.

Credit: Kathryn Killackey

A groundbreaking discovery at a 15,800-year-old archaeological site in Turkey has revealed the oldest known evidence of dog domestication. Genetic studies indicate that our canine companions were already widespread across Europe 14,300 years ago, during a time when humans were primarily hunter-gatherers and agriculture had yet to develop.

Determining the precise timeline for dog domestication is complex, especially due to the genetic similarities shared between Canis lupus familiaris (domestic dogs) and Canis lupus (gray wolves). Initially, it was believed that the earliest dogs dated back to around 10,900 years ago. However, earlier fossils resembling dogs have been found, as far back as 33,000 years ago, indicating the presence of ancestral dogs that were not fully domesticated.

To further examine the history of dogs, Dr. Lachie Scarsbrook and his team at the University of Oxford analyzed genetic material from various early dog-like remains unearthed at different archaeological sites in Europe.

The oldest confirmed dog remains were discovered at the Pinarbaş Ruins in central Anatolia, Turkey, dating back to the Upper Paleolithic period (15,800 years ago). These findings are currently the earliest direct evidence of dog existence, with more substantial evidence emerging around 5,000 years ago.

“By at least 15,800 years ago, dogs possessed physical and genetic traits akin to modern breeds,” noted Scarsbrook.

Researchers genetically verified that remains from Gough’s Cave, located in Somerset, England, belonged to a dog that lived approximately 14,300 years ago. The genetic cohesiveness between these two ancient dogs suggests a shared ancestor, a phenomenon that sparked intrigue among researchers, given the geographical distance between the cultures associated with these dogs.

The genome analysis indicates that these two Paleolithic dogs originated from a population that traversed across Europe between 18,500 and 14,000 years ago.

Despite their impressive range, Scarsbrook notes, “It’s unlikely dogs traveled across Europe independently.” Instead, the researchers propose that the Epigravettian culture played a role in their introduction, as evidenced by past archaeological findings indicating ancient human interactions.

14,300-Year-Old Dog Jawbone from Gough’s Cave, England

Credit: Natural History Museum

During significant periods, these ancient peoples migrated from the Italian peninsula into Western Europe and southeast into Turkey, fostering interactions that likely resulted in cultural and technological exchanges.

Dogs provided hunter-gatherers with enhanced hunting capabilities, protection from predators, and warmth during chilly nights, according to Scarsbrook.

Research at Gough’s Cave and the Pinarbaş ruins indicates the nature of ancient human-dog relationships. “These findings highlight the foundations of modern human-dog interactions,” states team member William Marsh from the Natural History Museum in London.

Isotope analysis has revealed that the Pinarbash community not only fed their dogs fish but also consumed it, indicating a profound bond between humans and canines. Dogs were buried similarly to humans, pointing to symbolic treatment of these animals about 15,000 years ago, notes Marsh.

At Gough’s Cave, the mixed diet of humans and dogs suggests a connection rich in symbolism. Instead of typical burial practices, some cultures there appear to have practiced ritual cannibalism, with evidence of bones showing mutilation marks and carvings.

Interestingly, similar markings were discovered on a dog jawbone from Gough’s Cave, suggesting parallels in treatment between humans and dogs, positing emotional ties as well, per Marsh. “They undoubtedly felt bonded to these animals, but the complexity of these expressions remains hard to interpret,” he reflects.

Scarsbrook hypothesizes that the domestication of dogs began during the Last Glacial Maximum, roughly 26,000 to 20,000 years ago. “Circumstances were dire for both wolves and humans in northern Eurasia during this period, pushing them southward and compelling interactions that may have initiated a unique companionship,” he states.

Exploring the Origins of Humanity Through Prehistoric Times in South-West England

Join a gentle walking tour that delves deep into the Neolithic, Bronze Age, and Iron Age, allowing you to immerse yourself in the rich heritage of early humans.

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Source: www.newscientist.com

Canine Detective Sniffs Out Spotted Lanternfly Eggs

The spotted lanternfly, an invasive species that damages leaves and first identified in the US a decade ago, is gradually moving across the East Coast and into the Midwest. Be cautious of its spread.

However, researchers are now employing new methods to combat its expansion—specially trained dogs skilled at detecting insect eggs before they hatch.

Since late last year, four dogs have been scouring parks in the Cleveland area, searching for trees, shrubs, park benches, rocks, and egg masses hidden near bridge supports. Each cluster of eggs can yield 30-50 spotted lanternflies.

An Australian Shepherd Cattle Dog Mix belonging to Gail Samco from Rio discovered a cluster of spotted lanternfly egg masses on a tree in Garfield Heights, Ohio, on May 5th.
sue ogrocki/ap file

To date, the dog has uncovered over 4,000 egg masses. This has aided in controlling an insect population that threatens crops worth approximately 200,000 dollars, including grapes, fruit trees, hops, and hardwoods, according to Connie Hausman, senior conservation science manager at Cleveland Metropark.

In just a few hours in April, the dog located about 1,100 egg clusters at the Metroparks Zoo in Cleveland, Hausman noted.

She emphasized that it’s not only the dogs that can be trained for this task.

“All of them have excellent noses, but not every dog qualifies,” she explained. “They had to undergo testing to demonstrate their abilities.”

Page Malone with her Cardigan Welsh Corgi, Bronco, searching for a cluster of spotted lanternfly eggs on May 5 in Garfield Heights, Ohio.
sue ogrocki/ap file

These dogs were trained as part of a research initiative by a team at Virginia Tech, focusing on curbing the spread of this pest, which originates from East Asia and is identifiable by its unique black-spotted, bright red wings.

The four dogs operating in Cleveland, owned by local residents, were already trained in scent detection before collaborating with Virginia Tech to hone their skills in identifying spotted lanternfly eggs.

Whenever the dogs find a new cluster of eggs, they are rewarded with a treat from their handler who then collects the egg masses.

Source: www.nbcnews.com

Research indicates that the canine teeth of marsupial carnivores grow continuously throughout their lives.

New research from the University of Tasmania also confirms important and fundamental morphological differences in Tasmanian devils (Sarcophilus harrisii) compared to most other animals.

Young Tasmanian devil (Sarcophilus harrisii). Image credit: Keres H. / CC BY-SA 4.0.

There has long been interest in comparing the biology of placental and marsupial mammals and how different traits relate to adaptation and converging ecomorphological niches in different regions of the world. I’m here. One interesting feature is the tooth replacement pattern.

“Unlike humans, dogs and many other animals, which have a second set of baby teeth and adult teeth, we now know that the Tasmanian devil only has one tooth that serves them throughout their lives.” said researchers at the University of Tasmania. Professor Mena Jonesstudy author.

“When Tasmanian devil joeys are young, they have very small teeth that fit their small bodies.”

“Tasmanian devils are separated from their mothers when they are just one-third of their adult size, and at this point they must become independent and feed themselves.”

“Instead of spending time erupting into adult teeth like humans, the Tasmanian devil’s teeth simply ‘erupt’ from the jaw and gums, pushing out more and more to fill the Tasmanian devil’s large mouth and head. , they raise animals to hold meat and prey and for protection. ”

“This is a really cool fact about a really cool species, and it points to a completely different evolutionary solution to the formation of teeth in growing animals than we know.”

The same phenomenon is seen in local possums and possums, as well as in some ancient marsupials such as the giant volhyaenids and sabertooths of South America.

“This information will help researchers determine the age of the animals they are studying, including those monitored in the wild for Tasmanian devil facial tumor research,” Professor Jones said.

of study Published in Proceedings of the Royal Society B.

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Mena E. Jones. 2023. Overbudding of teeth in marsupial carnivores: compensation for constraints. Procedure R. Soc. B 290 (2013): 20230644; doi: 10.1098/rspb.2023.0644

Source: www.sci.news