Tag: PLOS ONE

Labelling and form over substance.

A providential sequel to yesterday’s post.

It was after 3pm yesterday when I turned on my computer and wondered what today’s post was going to be; I wasn’t feeling especially creative!

But sitting in my ‘in-box’ was a link to the latest newsletter from The Smithsonian and within that newsletter was a perfect sequel to yesterday’s post What’s In A Name?

I’ll go straight to that article. (Apologies if you notice that there is a fair degree of overlap between the two articles.)

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Call a Dog a Pit Bull and He May Have Trouble Finding a Home

Dogs labeled as pit bulls at shelters may wait three times longer to be adopted—even when they aren’t actually pit bulls

An adorable shelter dog shouldn’t have a difficult time finding a home—but it might if it comes with the label “pit bull.” (LeticiaRose / iStock)
An adorable shelter dog shouldn’t have a difficult time finding a home—but it might if it comes with the label “pit bull.” (LeticiaRose / iStock)

By Rachel Nuwer, March 23, 2016

Regardless of a canine’s actual breed, simply labeling a dog a “pit bull” can condemn it to a significantly longer stay in a shelter and make it less attractive to potential adopters, concludes a new study in PLOS One.

Pit bulls are often stereotyped as aggressive and dangerous toward humans, though there is little evidence that those characteristics are inherent to the breed. The breed is popular among the dog fighting crowd, however, which contributes to its reputation for aggressiveness. To complicate matters, when attacks do occur, dogs may be labeled as pit bulls even when they are not. Indeed, in the United States, “pit bull” often serves as a catchall for a handful of breeds ranging from English bulldogs to American Staffordshire terriers; one person’s pit bull is another’s American bulldog mix.

This reputation follows the canines when they land in shelters. When potential adopters look at available dogs, they “don’t rate pit bulls any differently than look-alike dogs,” says the study’s lead author, Lisa Gunter, a graduate student in psychology at Arizona State University. “It’s only when we start attaching labels that people begin to perceive them more negatively.”

Most shelter dogs are of unknown origin, so employees often have to guess at an animal’s breed. Over a 10-year career working in shelters, Gunter noticed that she and her co-workers frequently arrived at different conclusions about a dog’s breed. And genetic studies have found significant discrepancies between descriptions of shelter dogs and their actual breed. One study found, for example, that half of the dogs that had been labeled as pit bulls at four Florida shelters had no pit bull ancestry in their DNA.

Gunter and her colleagues undertook a series of studies to find out how those potentially flawed labels might impact an animal’s chance of finding a home. They started by showing college students in California and users of the website Reddit photos of three dogs—a Labrador retriever, a pit bull-like dog and a border collie—without attached breed labels and asked questions about each, such as whether the dog looked smart or if the person would feel comfortable approaching it. The team found that participants ranked the pit bull-type dog as lowest on intelligence, friendliness, approachability and adoptability, and highest on aggressiveness and difficulty to train. When the pit bull appeared in a photo with an elderly woman or a child, however, it was rated more favorably.

Next, the researchers asked potential adopters at an Arizona shelter to rank dogs that appeared in photos and short videos on the animals’ approachability, intelligence, aggressiveness, friendliness, difficulty to train and adoptability. These scores were then summed to create an “attractiveness” composite for each pooch. To get around possible biases, such as apartment rules about animal sizes or bans on certain breeds, the team used phrases such as, “If circumstances allowed, I would consider adopting this dog,” to assess willingness to take a canine home.

These two dogs may look similar, but the pit bull label could mean that the one on the left may wait a lot longer to find a home. (Arizona Animal Welfare League)
These two dogs may look similar, but the pit bull label could mean that the one on the left may wait a lot longer to find a home. (Arizona Animal Welfare League)

When the dogs were not labeled as any particular breed, participants ranked pit bulls and look-alikes (dogs that were the same size and color as the pit bulls) as equally attractive. Potential adopters even ranked the pit bulls in video recordings as more attractive than the non-pit bull matches. When the researchers introduced breed labels, however, that trend reversed, with participants ranking the same dog as significantly less attractive than similar dogs without the label.

The researchers also found that pit bulls at that shelter waited over three times as long to find a home as their matched counterparts.

Finally, the team analyzed a set of data from an animal shelter in Florida that recently removed breed descriptions altogether. When freed from the loaded label, pit bull-like dogs were much more likely to find a home. Adoptions of these dogs increased by more than 70 percent, compared with the prior year, and the shelter’s euthanasia rate for the same group dropped by 12 percent, probably because more of them were finding homes.

Taken together, these results “are very convincing that breed labels negatively impact any dog that is labeled as ‘pit bull,’” says Erica Feuerbacher, who studies dogs at Carroll College in Montana and was not involved in the study. “Furthermore, we know from other studies that humans are quite bad at correctly labeling breeds, so many dogs could be erroneously labeled pit bull—even though they are not—and by that label they become less adoptable.”

Eliminating breed labels, which people seem to be using as poor proxies for stereotyped traits, may be the key to banishing a significant amount of dog discrimination—and getting more dogs into homes, Feuerbacher and the other researchers argue. There is also a need to devise better means of measuring dogs’ true personalities, including their potential for aggression, and of ensuring those assessments are valid not just in the shelter environment but also in homes, Gunter notes.

“We want to drive the adoption conversation toward evaluating whether an individual dog, regardless of the breed, is a suitable candidate for adoption,” she says. “Then we can match-make between the personality of the dog and that of the person, instead of just relying on labels.”

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You can see why it so perfectly followed on from yesterday!

Not just my post but yesterday’s comments. Such as this from Tony:

Another example of form over substance. When will we learn?

So I know you will all cheer Erica Feuerbacher who is quoted towards the end of that Smithsonian essay and I will close with her words, in part: “We want to drive the adoption conversation toward evaluating whether an individual dog, regardless of the breed, is a suitable candidate for adoption. Then we can match-make between the personality of the dog and that of the person, instead of just relying on labels.

Oh, and a very Happy April Fool’s Day!

Primordial feelings.

But not of humans – of dogs!

A wonderful item recently on the BBC News website.

Jealous wags: Dogs show envy is ‘primordial’ emotion

By Matt McGrath – Environment correspondent, BBC News

These border collies inspired the study on jealousy in dogs.
These border collies inspired the study on jealousy in dogs.

Jealousy is not just a human condition according to researchers, as it appears to be hard wired into the brains of dogs as well.

Scientists in California found that canines succumbed to the green eyed monster when their owners showed affection to a stuffed dog in tests.

Some experts have argued that jealousy requires complex cognition and is unique to people.

But the authors say their work shows it may also come in a more basic form.

These findings probably won’t be a major surprise to anyone who’s ever owned a dog, but the team say this is the first experimental test of jealous behaviours in man’s best friend.

Human jealousy is a complicated emotion, requiring a “social triangle” and usually arising when an interloper threatens an important relationship.

It is said to be the third leading cause of non-accidental homicide across cultures.

Building on research that shows that six month old infants display jealousy, the scientists studied 36 dogs in their homes and video recorded their actions when their owners displayed affection to a realistic-looking stuffed canine.

Faux fido

Over three quarters of the dogs were likely to push or touch the owner when they interacted with the decoy.

The envious mutts were more than three times as likely to do this for interactions with the stuffed dog compared to when their owners gave their attention to other objects including a book.

Around a third tried to get between the owner and the faux fido, while a quarter of the put-upon pooches snapped at the dummy dog.

“Our study suggests not only that dogs do engage in what appear to be jealous behaviours but also that they were seeking to break up the connection between the owner and a seeming rival,” said Prof Christine Harris from University of California in San Diego.

“We can’t really speak to the dogs’ subjective experiences, of course, but it looks as though they were motivated to protect an important social relationship.”

The researchers believe that the dogs understood that the stuffed dog was real. The authors cite the fact that 86% of the dogs sniffed the toy’s rear end, during and after the experiment.

Jealousy, according to the authors, may have evolved in species that have multiple dependent young that concurrently compete for food and affection.

The argue that jealousy might give an advantage to a young animal that is not only alert to the interactions between its siblings and its parents but is motivated to intervene.

“Many people have assumed that jealousy is a social construction of human beings – or that it’s an emotion specifically tied to sexual and romantic relationships,” said Prof Harris.

“Our results challenge these ideas, showing that animals besides ourselves display strong distress whenever a rival usurps a loved one’s affection.”

The research has been published in the journal, PLOS One.

Have a wonderful weekend! If possible free of primordial feelings! (I’m speaking to your dog!)

Dogs and wolves – fascinating research.

Something new to learn every day!

I have been saving this report for a few weeks.  Following yesterday’s great news about the latest concerning wolves in Oregon, today seemed a perfect follow-on with a report first published in online journal PLOS ONE. However, what follows is a full republication of the report as I read it on the Science Daily website.

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Teaching young wolves new tricks: Wolves are considerably better imitators than dogs

Date: January 31, 2014

Source: Veterinärmedizinische Universität Wien

Summary: Although wolves and dogs are closely related, they show some striking differences. Scientists have undertaken experiments that suggest that wolves observe one another more closely than dogs and so are better at learning from one another. The scientists believe that cooperation among wolves is the basis of the understanding between dogs and humans.

Wolves are considerably better imitators than dogs. Credit: Walter Vorbeck
Wolves are considerably better imitators than dogs.
Credit: Walter Vorbeck

Although wolves and dogs are closely related, they show some striking differences. Scientists from the Messerli Research Institute at the University of Veterinary Medicine, Vienna have undertaken experiments that suggest that wolves observe one another more closely than dogs and so are better at learning from one another. The scientists believe that cooperation among wolves is the basis of the understanding between dogs and humans.

Their findings have been published in the online journal PLOS ONE.

Wolves were domesticated more than 15,000 years ago and it is widely assumed that the ability of domestic dogs to form close relationships with humans stems from changes during the domestication process. But the effects of domestication on the interactions between the animals have not received much attention. The point has been addressed by Friederike Range and Zsófia Virányi, two members of the University of Veterinary Medicine, Vienna (Vetmeduni Vienna) who work at the Wolf Science Center (WSC) in Ernstbrunn, Niederösterreich.

Wolves copy other wolves solving problems

The scientists found that wolves are considerably better than dogs at opening a container, providing they have previously watched another animal do so. Their study involved 14 wolves and 15 mongrel dogs, all about six months old, hand-reared and kept in packs. Each animal was allowed to observe one of two situations in which a trained dog opened a wooden box, either with its mouth or with its paw, to gain access to a food reward. Surprisingly, all of the wolves managed to open the box after watching a dog solve the puzzle, while only four of the dogs managed to do so. Wolves more frequently opened the box using the method they had observed, whereas the dogs appeared to choose randomly whether to use their mouth or their paw.

Watch closely …

To exclude the possibility that six-month old dogs fail the experiment because of a delayed physical or cognitive development, the researchers repeated the test after nine months. The dogs proved no more adept at opening the box than they were at a younger age. Another possible explanation for the wolves’ apparent superiority at learning is that wolves might simply be better than dogs at solving such problems. To test this idea, the researchers examined the animals’ ability to open a box without prior demonstration by a dog. They found that the wolves were rarely successful. “Their problem-solving capability really seems to be based on the observation of a dog performing the task,” says Range. “The wolves watched the dog very closely and were able to apply their new knowledge to solve the problem. Their skill at copying probably relates to the fact that wolves are more dependent on cooperation with conspecifics than dogs are and therefore pay more attention to the actions of their partners.”

The researchers think that it is likely that the dog-human cooperation originated from cooperation between wolves. During the process of domestication, dogs have become able to accept humans as social partners and thus have adapted their social skills to include interactions with them, concomitantly losing the ability to learn by watching other dogs.

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Story Source: The above story is based on materials provided by Veterinärmedizinische Universität WienNote: Materials may be edited for content and length.

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Journal Reference:

  1. Friederike Range, Zsófia Virányi. Wolves Are Better Imitators of Conspecifics than DogsPLoS ONE, 2014; 9 (1): e86559 DOI: 10.1371/journal.pone.0086559

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So if you, like me, are one of many people who believe that your dog knows what you are thinking, then we need to thank the wolf!

A reminder of very ancient times.

The positives and negatives of dogs being dogs.

It is our routine at home here in Oregon to let the kitchen group of dogs out first (Lily, Ruby, Casey & Paloma, with Sweeny tagging along) while Jean puts together our small breakfast.  The time is around 6am to 6:30am and both Jean and I are usually wearing dressing gowns.  Once this first group has been outside, then I let the ‘bedroom’ group out (Pharaoh, Cleo, Hazel and Dhalia).

Such as I did this morning, unusually a day starting dull with overcast cloud.

Suddenly, I heard the most awful squealing of an animal in pain over in the dense wooded area to the South-West of the property.

The wooded area in question.
The wooded area in question.

In plastic slippers and dressing-gown only, I dashed into the woods and to my horror saw that Cleo, Hazel and Dhalia had cornered a young deer, and at least Hazel was nipping at a rear leg.

A not uncommon sight at home.
A not uncommon sight at home.

I screamed at the dogs, to no avail.  They took not the slightest notice of me.

Then the young deer wriggled free and fled into the trees.  The dogs recornered it and plunged in again.  The deer broke free again, and so it went on.  Eventually, after some ten minutes of the most dreadful hollering and chasing by me, the young deer jumped a fence and ran off with its mother who had been shadowing the terrible event.  I prayed that it wasn’t badly hurt.

Gracious, I was so angry with the dogs!  What disgusting behaviour towards this young, beautiful creature.

When I was back in the house trying to regain my breath, still so angry at the dogs, a thought came to my mind.  Tens of thousands of years ago, this behaviour of the dogs was held in great esteem.

Early man evolved from a tribal hunter-gatherer existence to the pastoral life of farming about 10,000 years ago.  If the DNA evidence shows, as it does, that the dog evolved from the wolf as a separate species around 100,000 years ago, then dogs were part of the life of hunter-gatherer man for something of the order of 90,000 years, possibly a couple of decades longer!

In fairness, the present lineage of dogs was domesticated from grey wolves only about 15,000 years ago. Despite fossil remains of domesticated dogs having been found in Siberia and Belgium from about 33,000 years ago, none of those lineages survived the Last Glacial Maximum. No fossil specimens prior to 33,000 years ago have indicated that they are clearly from the morphologically domesticated dog.

Even if, and it’s a very big ‘if’, the relationship between man and dog is only about 15,000 years old, one can only speculate how each species came to know the other, in every imaginable way.

Actually, we can go beyond speculation because in a study published by the PLOS ONE scientific journal in March 2013, Dr. Robert Losey, Associate Professor in the Department of Anthropology, University of Alberta and the lead author, explained that:

Dog burials appear to be more common in areas where diets were rich in aquatic foods because these same areas also appear to have had the densest human populations and the most cemeteries,

If the practice of burying dogs was solely related to their importance in procuring terrestrial game, we would expect to see them in the Early Holocene (around 9,000 years ago), when human subsistence practices were focused on these animals. Further, we would expect to see them in later periods in areas where fish were never really major components of the diet and deer were the primary focus, but they are rare or absent in these regions.

The PLOS ONE paper went on to report that researchers found that most of the dog burials occurred during the Early Neolithic period, some 7,000-8,000 years ago, and that “dogs were only buried when human hunter-gatherers were also being buried.

So back to the morning’s drama between the dogs and the young deer.

The efficiency of the way the dogs cornered the deer was breath-taking.  Had I not been coming at them in such a state of anger and agitation, and especially if I was one of a group of say, 2 or 3 humans, the odds are that the deer could have been grabbed and dispatched.  In other words, those three dogs had demonstrated that 20,000, 40,000, 80,000 or more years ago, they were critically useful at helping early hunter-gatherer man feed himself.

Back to Dr. Losey’s view, “I think the hunter-gatherers here saw some of their dogs as being nearly the same as themselves, even at a spiritual level. At this time, dogs were the only animals living closely with humans, and they were likely known at an individual level, far more so than any other animal people encountered. People came to know them as unique, special individuals.

Does make sense, doesn’t it.

P1130569

“Oh look! We could have turkey for dinner tonight!”

Dogs and Man: an eternity of a relationship

New research shows the beauty of the bond between dog and man.

I was doing some research for another writing project and came across this on the NBC News website:

What prehistoric dog burials tell us about owners

By Jennifer Viegas

An analysis of ancient dog burials finds that the typical prehistoric dog owner ate a lot of seafood, had spiritual beliefs, and wore jewelry that sometimes wound up on the dog.

The study, published in PLoS ONE, is one of the first to directly test if there was a clear relationship between the practice of dog burial and human behaviors. The answer is yes.

Photo - Robert Losey. The ancient dog was buried in a resting position. It was part of a study to directly test if there was a clear relationship between the practice of dog burial and human behaviors. The answer is yes.
Photo – Robert Losey.
The ancient dog was buried in a resting position. It was part of a study to directly test if there was a clear relationship between the practice of dog burial and human behaviors. The answer is yes.

That PLOS ONE study, published March 2013, found that “dog domestication predates the beginning of agriculture about 10,000 years ago.”

Dr. Losey and his dog, Guiness

Dr. Robert Losey, Associate Professor in the Department of Anthropology, University of Alberta and the lead author, explained that,

Dog burials appear to be more common in areas where diets were rich in aquatic foods because these same areas also appear to have had the densest human populations and the most cemeteries,

If the practice of burying dogs was solely related to their importance in procuring terrestrial game, we would expect to see them in the Early Holocene (around 9,000 years ago), when human subsistence practices were focused on these animals.

Robert Losey continued.

Further, we would expect to see them in later periods in areas where fish were never really major components of the diet and deer were the primary focus, but they are rare or absent in these regions.

The PLOS ONE paper went on to report that researchers found that most of the dog burials occurred during the Early Neolithic period, some 7,000-8,000 years ago, and that “dogs were only buried when human hunter-gatherers were also being buried.”  Dr. Losey went on to say,

I think the hunter-gatherers here saw some of their dogs as being nearly the same as themselves, even at a spiritual level. At this time, dogs were the only animals living closely with humans, and they were likely known at an individual level, far more so than any other animal people encountered. People came to know them as unique, special individuals.

Those interested in the research paper may find it here, and read the Abstract:

Ancient DNA Analysis Affirms the Canid from Altai as a Primitive Dog

Abstract

The origin of domestic dogs remains controversial, with genetic data indicating a separation between modern dogs and wolves in the Late Pleistocene. However, only a few dog-like fossils are found prior to the Last Glacial Maximum, and it is widely accepted that the dog domestication predates the beginning of agriculture about 10,000 years ago. In order to evaluate the genetic relationship of one of the oldest dogs, we have isolated ancient DNA from the recently described putative 33,000-year old Pleistocene dog from Altai and analysed 413 nucleotides of the mitochondrial control region. Our analyses reveal that the unique haplotype of the Altai dog is more closely related to modern dogs and prehistoric New World canids than it is to contemporary wolves. Further genetic analyses of ancient canids may reveal a more exact date and centre of domestication.

DNA testing indicates that the evolutionary split between dogs and wolves was around 100,000 years ago or more. The value of dogs to early human hunter-gatherers led to them quickly becoming ubiquitous across world cultures.

Thus it is in the order of 90,000 years, possibly a couple of decades longer, from the point where a bond was made between early man and the wolf to the era when man evolved from a tribal hunter-gatherer existence to farming the resources of the planet. Thousands and thousands of years of dogs being the greatest animal relationship we humans have ever experienced.

Back to that NBC news item:

Erik Axelsson, a researcher at Uppsala University’s Science for Life Laboratory, has also studied prehistoric dogs. He too found that human and dog diets, burial practices and more often paralleled each other, revealing how close the dog-human bond has been for thousands of years.

Axelsson said, “Dogs and humans share the same environment, we eat similar food and we get similar diseases.

Based on the number of burials, we also often spend eternity together too.

Eons of time.

A hundred, thousand years of knowing man, and it shows in the eyes.