A new study has a bone to pick with earlier researchers who concluded the domesticated dog has been around for 30,000 years.
New 3D analysis of skulls that had been identified as two of the earliest dogs shows they were actually wolves, a research team writes in the Nature journal Scientific Reports.
Fossilized remains that scientists said showed dogs date back at least 31,680 years — specifically those remains unearthed at Goyet Cave in Belgium — actually belonged to a wolf, according to a new study. So too, the new study says, did a 13,905-year-old fossil that was identified as belonging to a dog after it was found at a site called Eliseevichi in Russia.
The new study concludes that the the domestication of dogs happened during the Neolithic era (10,200 B.C.-2,000 B.C.) as opposed to the Paleolithic era (2.6 million years ago to 10,200 B.C.)
“Scientists have been eager to put a collar on the earliest domesticated dog,” lead author Abby Grace Drake said. “Unfortunately, their analyses weren’t sensitive enough to accurately determine the identity of these fossils.”
“Previous research has claimed that dogs emerged in the Paleolithic but this claim is based on inaccurate analyses,” Drake told Discovery News. “We reanalyzed some of the fossil canids from the Paleolithic and show that they are, in fact, wolves.”
“We did confirm that the Neolithic specimens Shamanka II (around 7,372 years old) and Ust’-Belaia (about 6,817 years old) are dogs, and therefore domestication took place by this time period or earlier,” added Drake, an assistant professor of biology at Skidmore College.
That means the wolves — who are generally (but not unanimously) believed to have evolved into dogs, possibly as a result of their interacting with humans — first appeared on earth after humans were farming and living in settlements, as opposed to when they were living in caves and hunting and gathering.
Drake and colleagues Michael Coquerelle and Guillaume Colombeau used scans and 3D visualization software to study the shape and size of the two oldest skulls and compare the data with measurements from the skulls of other dogs and wolves, according to a report on Phys.org.
That technique allowed the team to identify subtle morphological differences between dogs and wolves, such as the direction of the eye cavity and the angle between the muzzle and forehead.
(Photo: Abby Grace Drake, Skidmore College)
Posted by John Woestendiek February 6th, 2015 under Muttsblog.
Tags: analysis, animals, dog, dogs, domestication, evolution, fossilized, fossils, neolithic, origin, paleolithic, pets, remains, research, science, skidmore college, wolf, wolves
The reason dogs are still around — and probably will still be when we’re not — is their uncanny ability to adapt.
Since wolves were first domesticated, becoming dogs, they’ve been on a continuous learning curve, learning how to live alongside man, and taking advantage of everything from his good nature to his furniture to his kitchen appliances.
Perhaps no breed is more adept at working these angles than beagles. They are master escape artists, wily hunters and accomplished problem solvers whose cuteness and charm trumps those occasions when they are — dare we say it — pains in the ass.
This one found a way to get chicken nuggets out of a toaster oven on the kitchen counter.
And his owner caught her in the act.
After Lucy came under suspicion for the disappearance of a roast that had been cooking in the oven, her owner set up a hidden camera. It caught Lucy as she nudged a chair next to the counter, jumped up on said counter, opened the toaster oven, removed some chicken nuggets, and enjoyed a snack.
”A few weeks before she took a roast out of the oven that had been cooking for a few hours … So I set her up. I put some nuggets in the oven… Pressed record and left,” her owner, Rodd Scheinerman, said on his YouTube post. “This was 7 minutes into the video.”
We present this as proof positive that dogs just keep getting more clever while we humans … well, I’ll refrain from badmouthing an entire species.
But given Lucy’s kitchen skills, and the possibility she could be injured, we think her owner might want to consider limiting her access to the room when he’s not there and the oven is on, maybe with a dog-proof barricade.
A very dog-proof barricade.
Posted by John Woestendiek January 17th, 2014 under Muttsblog, videos.
Tags: adapt, adaptability, animals, appliances, beagle, beagles, behavior, camera, caught in the act, chicken, clever, dog, dogs, domesticated, domestication, evolution, food, furniture, hidden camera, humans, kitchen, nuggets, oven, pets, toaster oven, video
Remember Denver, the guilty, oh-so-guilty, looking yellow lab that was captured on video by her owner while she was being interrogated in the case of the missing cat treats?
We suggested — partly in jest — that she might be innocent, that appearances can be deceiving, not to mention misinterpreted, and that, just maybe, the cat did it.
Now — with the video having gone viral, with dog and owner having appeared on the ABC’s Good Morning America, with a line of “guilty dog” merchandise having been spawned — there’s more reason to believe that Denver might have been wrongly convicted. How guilty one looks and how guilty one is are two different things — especially when it comes to dogs.
Guilt, research shows, may be just another human emotion that dog owners anthropomorphically ascribe to dogs.
And all those behaviors Denver exhibited – avoiding eye contact, lying down, rolling into a submissive position, dropping the tail, holding down the ears or head, raising a paw – are more likely triggered by the owner’s semi-scolding tones than any feelings of “remorse.”
This reminder/revelation comes from someone who knows, who did her master’s dissertation on this very topic, and who produces one of my new favorite blogs, Dog Spies.
Julie Hecht is a New York-based behavioral researcher who has worked with Patricia McConnell and Alexandra Horowitz. She wrote her dissertation at the University of Edinburg on “Anthropomorphism and ‘guilty’ behavior in the dog,” and did her research with the Family Dog Project in Budapest, Hungary. She recently started Dog Spies, which focuses on the science behind dog behaviors and the dog-human relationship, and she divides her time between research, lecturing, blogging and working with individual pet owners.
As was my goal (plug alert) in my recently published book, “DOG, INC: The Uncanny Inside Story of Cloning Man’s Best Friend,” she attempts to take the boring out of science, thereby making it interesting and understandable. “Scientific journals should be titled, ‘Lots of great information within, a tad boring to read!’ Dog Spies translates that information and shares it with you,” reads the introduction to her blog.
Judging from her “guilty dog” blog entry — and you know its trustworthy, because it has footnotes – Denver’s appearance, with her owners, on the ABC morning show raised her hackles a bit.
“According to the dictionary, ‘news’ is ‘information about recent events or happenings.’ I did not see any news during that morning show. Instead, I saw a bunch of morning personalities throwing out assumptions and offering the audience pleasing banter and humorous judgments about dogs. They provide no real information or ‘news’ about what happened to the cat treats.”
Here Hecht has hit on one of my pet peeves — pun definitely not intended. Rather than shedding some light, doing some research, and furthering our understanding of canines, the ABC segment — like so much of what the media, blogs included, feed us about dogs — was the kind of cutesy, substance-free fluff that reinforces misinformation and misunderstanding.
Like most everyone else, the smiling morning show hosts concluded Denver must have eaten the cat treats. When shown the empty bag and asked, “Did you do this?” Denver displays squinting eyes, averts her head and makes a highly laughable presentation of her teeth.
Guilty. Guilty. Guilty.
Or maybe not.
Hecht cites a 2008 research paper that says 74 percent of dog owners attribute guilt to dogs, and believe dogs know when they have done something owners disapprove of. But scientific research shows that it’s not knowledge of a misdeed, or remorse, that leads to the guilty look, but an owner’s scolding. (See the New York Times piece, “It’s an Owner’s Scolding That Makes a ‘Guilty’ Dog.”)
Or, see this — a video Hecht made that shows a dog named Gidget being falsely accused:
As Alexandra Horowitz, author of “Inside of a Dog,” once put it: “We’ve trained them that when they see us angry, they give us that guilty look. I’m not saying they don’t feel guilt … I can’t test that yet. But we generate the context that prompts them to produce this look.
Why then, in the guilty dog video gone viral, does Denver show these behaviors when the other, presumed innocent family dog, Masey, does not?
“Research finds that even post-transgression, not all dogs show the ‘guilty look’ in the presence of a non-scolding owner,” Hecht says. And, transgressions aside, it might be the simple fact that Denver is a more expressively submissive dog, according to Hecht, who says part two of her entry on the “guilty dog look” will be appearing soon on her blog.
Why do dogs show what appears to be a guilty look more so than do their progenitors, wolves?
“Dogs have, for the most part, incredibly malleable and expressive faces (much more so than, say, cats) and from this, we can often see the subtleties of their eyebrows going down or up or their wide forward-facing eyes, becoming wider. All of these things could impact how humans attribute mental states to dogs,” Hecht told me.
My theory is there’s more at play — though maybe I’m giving dogs more intellectual credit than they deserve. I think mastering the guilty look is another way dogs have evolved since their domestication, and to cope with their domestication — part of their ongoing adaption to pethood. By showing submission, some of them may have have figured out, they can keep the peace, and maybe even get a belly rub or a Milkbone.
To me, the even more interesting question, when it comes to “the guilty look,” is whether, even before the scolding comes, dogs can sense it’s about to. Before a word comes out of the owner’s mouth, before an angry stance is even taken, can dogs sense that some displeasure is churning within us?
I, without any research or footnotes to back me, believe so. My scientific explanation for this: It’s magic.
Dogs are figuring us out. Which, until recent years, is maybe more than they could say about us. We’ve always been more concerned with their brawn than their brain, more concerned with their beauty than their behavior. It’s man’s hand that has led to the vast diversity of shapes and sizes in dogs. And while breeders have begun to put a higher priority on temperament, it can still be argued that appearance is placed above all else.
Could it be, in their way – without the aid of microscopes, opposable thumbs or access to our pedigrees – dogs are looking more deeply into us than we are into them? Could it be, during their time in domestication, dogs, as a species, have amassed a wealth of knowledge on how to best get along with humans, and have become even better at doing so than humans?
I think there’s more at work than breeding and genetics and instinct when it comes to dog behavior. An ongoing and not fully understood evolution is at play in the dog-human relationship. And that is the reason – all those unanswered questions about behavior, coupled with those we wrongly assume we know the answers to – why dog blogs of substance, like Hecht’s, are important.
At the same time, though, I rue the day when our understanding of dog behavior is complete — when we can explain every act of dog as stemming from some lingering instinct, or adaptation to their domestication. For then the magic will be gone.
I want all three — my science, my magic and my dog. Does that make me greedy?
Posted by John Woestendiek April 27th, 2011 under Muttsblog.
Tags: abc, adaptation, alexandra horowitz, animals, anthropomorphism, appearances, behavior, cat treats, cognition, coverage, denver, dog, dog inc., dog spies, dog-human, dogs, dogs guilty look, domestication, emotions, feelings, good morning america, guilt, guilty, guilty look, humans, inside of a dog, instinct, julie hecht, looks, media, morning show, news, patricia mcconnell, pets, relationship, remorse, scolding, submission, submissive, video, viral
The amazing and still evolving relationship between dogs and humans is the subject of “Dogs Decoded,” a NOVA episode that airs tonight.
The program looks at how dogs – domesticated for longer than any other animal on the planet — have come to understand us in a way other animals cannot, how they can read our emotions, how that relationhip evolved and where it might lead.
“Dogs Decoded” investigates new discoveries in genetics that are illuminating the origin of dogs — with revealing implications for the evolution of human culture as well. It visits Siberia, where the mystery of dogs’ domestication is being repeated in foxes. A 50-year-old breeding program is creating an entirely new kind of creature, a tame fox with some surprising similarities to man’s best friend.
The episode reveals the science behind the bond between humans and their dogs, and it spurs new questions about what this could mean for our relationships with other animal species.
Among the questions the episode explores are why dogs bark, when their predecessors, wolves, didn’t, and whether it’s a behavior that evolved so they could communicate with humans; why a hormone that humans release at birth to bond mother to baby is also released when humans interact with dogs, bonding us not just emotionally, but biologically; what makes dogs able to understand social cues, like pointing, that other animals cannot; and what clues dog DNA might hold to understanding the genetic causes of certain diseases.
Posted by John Woestendiek November 9th, 2010 under Muttsblog.
Tags: animals, dna, dog-human, dogs, dogs decoded, domestication, evolution, genetics, humans, nova, pbs, pets, relationship, television, tv, wolves
Ace remembers the park he used to play in, the places he liked to poop, the street he used to live on, the people who gave him treats. Ace remembers which rowhouse windows cats lived behind, which dogs once snapped at him, where his favorite bar is, who’s a friend, who’s a foe and, most of all, how to get a handout.
Watching him back in the old neighborhood, after a three month absence, I was impressed with just how much he remembered — from the moment we returned to Riverside Park and he ran up to Stan, the biscuit man, recognizing him even though Stan was in a new motorized chair.
When he saw one morning, from across the street, his friend Lori in the park, walking her dogs Chi Chi, Lola and Vinnie Barbarino (a foster), he bolted. Of course, she, too, had been a frequent treat provider — so much so that Ace’s ears would always perk up when he heard Chi Chi barking in the distance.
Nearly all dogs remember where they’ve gotten handouts — that’s pretty much how dogs became dogs in the first place, scavenging the outskirts of villages as wolves, then befriending residents who would throw them some leftovers.
I don’t think a dog’s memory is entirely food-based, or even entirely scent-based. I think dogs tend to recognize a good, kind soul when they meet one, and that somehow they register that information in their memory banks. That said, I think that the largest part of it is food and scent-based, and is instinctual, which is maybe why they remember better than we do, or at least I do.
Pehaps if I ran into an old friend in the park, and was struggling to remember his or her name, I would be better able to do so if I knew a free dinner would be involved. When one’s survival depends on it, one is willing to put more energy into being sociable.
I know that has been the case with me, on this journey. One can’t be a guest in someone’s home and then keep to oneself. One can’t just eat and run. One can’t just sleep and blog. That just wouldn’t be right. As our travels continue later this week, and we start month four, on the road, on a shoestring, after our layover in Baltimore, I would be well-served to keep that in mind — to, once again, be a little more like Ace, who once wandered Baltimore’s streets as a stray.
It’s not feigning love to get a treat (or a meal, or a bed, or an RV); it’s not purely reward-based affection, it’s more a case of loving both the person and the treat. That’s how I like to see it: “I am so happy to see you again, and thrilled just to be petted by you, but if perchance you have a treat in your pocket, that’s good, too.”
Wolves could have gotten their leftovers and ran; instead, they ended up bonding with humans and becoming dogs — not purely because it would mean more treats, but because, I like to think, the two species saw something in each other.
Just as wolves would return to where they’d gotten handouts, Ace made his rounds last week in the old neighborhood. At the park, he’d run up to anyone who had ever given him a treat, poking his nose in their pocket or purse to remind them in case they’d forgotten. Ace paused for a longtime when we passed Bill’s Lighthouse, a restaurant near my former home where a man name Jack — once Ace poked his head in the door and made his presence known — used to always come out and him bring a treat. Across the street, at Leon’s, Ace — as he only rarely does — went into overpower-the-master mode and dragged me inside.
He must have known that Donna, one of the bartenders, was there. Every day, before we left the neighborhood, she would see him coming, take a break and feed him a Slim Jim, unwrapping it, and breaking it into small pieces. I’m not saying eating Slim Jims improve memory, but they sure did in Ace’s case.
Another block down, on my old street, I let go of the leash and let Ace run up to the door of his old house. He stood there waiting to get in, and when that didn’t work he went and stood at the door of the neighbor’s — waiting, waiting and waiting.
He fully remembered which dogs in the park were his friends, and avoided the ones he had always avoided. He remember what games he played with whom — with Cooper, it was biting her back legs; with Darcy, it was biting her front paws and taking her entire head into his mouth.
Walking down the sidewalk, Ace remembered every rowhouse in whose front window he had ever seen a cat, and paused to look inside — again, not because he likes to eat cats, but because he loves them. He can stare at them for hours, he’ll play and cuddle with those who permit it, and just maybe, late at night, when nobody’s looking, he’ll go and eat their food.
We are scavengers at heart, my dog and me.
Posted by John Woestendiek September 16th, 2010 under Muttsblog.
Tags: ace, ace does america, animals, baltimore, behavior, dog's country, dogs, dogscountry, domestication, evolution, food, handouts, humans, instincts, love, memory, ohmidog!, pets, road trip, scavenging, species, survival, travels with ace, treats, wolves
On the streets of Moscow, the evolution of dog is playing out in reverse.
So contends Andrei Poyarkov, a biologist and wolf specialist who has dedicated himself to studying the city’s vast population of strays — the 30,000-plus dogs that, while learning such new urban skills as using the subways, are in reality moving back to something closer to a wolf-like state.
His efforts were recounted in an enlightening piece in yesterdays Financial Times.
Poyarkov began studying the strays in 1979, starting with those living near his apartment and the ones he encountered on his way to work. He made recordings of the sounds that the strays made, and began to study their social organization. He photographed them and mapped where each dog lived.
Poyarkov, who works at the A.N. Severtsov Institute of Ecology and Evolution, says Moscow’s strays are somewhere between house pets and wolves, in the early stages of the shift from the domesticated back towards the wild. It’s a process that he believes can’t be reversed, at least not in individual dogs. The strays are resistant to domestication, and many can’t stand being confined indoors.
Most of Moscow’s strays rarely wag their tails, are wary of humans and show no signs of affection towards them. A few remain comfortable with people, but more have moved on to a second stage, where they will approach people only to get food.
A third group interact mainly with other strays and get their food from garbage bins.
The last of Poyarkov’s groups are the wild dogs. “There are dogs living in the city that are not socialized to people. They know people, but view them as dangerous. Their range is extremely broad, and they are predators. They catch mice, rats and the occasional cat. They live in the city, but as a rule near industrial complexes, or in wooded parks. They are nocturnal and walk about when there are fewer people on the streets.”
Posted by John Woestendiek January 19th, 2010 under Muttsblog, videos.
Tags: andrei poyarkov, animals, behavior, city, dog, dogs, domestication, evolution, feral, moscow, pets, research, reverse, russia, stray, strays, street, study, subway, urban, wild, wolf, wolves
The theory that the domestic dog originated in East Asia has been challenged by an international group of researchers who say African dogs are just as genetically diverse.
The huge genetic diversity of dogs found in East Asia had led many scientists to conclude that it was where the domestication of the dog began.
But newly published research, based on analyzing blood samples from dogs in Egypt, Uganda and Namibia, shows the DNA of dogs in African villages is just as varied, according to the New York Times.
The research was originally aimed at tracking down a newly discovered “small gene” that led to wolves being downsized in their transition to dogs. Instead, as reported in the current issue of Proceedings of the National Academy of Sciences, the researchers found information they say calls into question where wolves were first domesticated.
Lead scientist, Adam Boyko of the Department of Biological Statistics and Computational Biology at Cornell University, says he decided to look at village dogs at least partly because his brother, an anthropologist as the University of California-Davis, was head there on a honeymoon. Also there are more mutts there — dogs more genetically diverse than bred dogs.
It’s the mutts that may hold the key to the learning the origins of dog domestication.
Posted by John Woestendiek August 4th, 2009 under Muttsblog.
Tags: africa, diversity, dna, dogs, domestication, east asia, eurasian, gene, genetics, humans, location, origin, research, science, small ene, study, villages, wolf, wolves