Retired now, Malcolm was a veterinarian at Woods Humane
Society from 2005 to 2012. He still resides in Morro Bay where he has
found geographic fulfillment. Pictured here with his side-kick, Annie.
They are both from Woods Humane Society.
Contact Malcolm
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The
Evolution of Our Favorite Pets
by
Malcolm Riordan
Being
dog enthusiasts, most of us hold the general notion that dogs are a
separate species evolved from ancient wolves - man allowed and even
strove for wolves to incorporate into their human hunter-gather
society. It's pretty intuitive to envision humans taming the orphaned
wolf pups or litters which they'd encountered or that had showed up,
adults too, in the periphery of human camps. Man soon realized the
wolf-like abilities to guard and aid in the hunt. Encouraging survival
and selecting the early proto-dogs best fit for those purposes drove
11,000+ years of evolutionary process that led to our dogs of now - a
species distinct from their ancient ancestor wolves.
Anthropologist
Brian Hare of Duke University has been on the forefront of
demonstrating a newer more specific refinement of our popular layman's
beliefs about how Team Man-and-Dog actually performed their
evolutionary dance.
Significant
evidence demonstrates Hare's theory that man had not worked to draw in
the wolves - rather that throughout historical time and the times
previous, fossil records show that man had routinely and repeatedly
hunted wolves - and other large predator species that competed with or
threatened man - and had in every old world situation, hunted them to
extinction.
That
and other strong DNA evidence has led Brian Hare to posit that it was
wolves who approached man - likely in the context of, say scavenging
around garbage piled on the edges of human settlements. Wolves that
were bold enough to do this would be readily killed if they at all
menaced humans with aggressive behavior. Meanwhile the bold but
friendly wolves would have been tolerated - and from there - over
generations, centuries and millennia gone by - eventually converted the
tame-able and friendly wolves that would evolve into ever expanding
mutual benefits of hanging out closer and closer to, and then with man.
In
the big picture, Hare simply states: "Most likely, it was wolves that
approached us, not the other way around."
As
noted in last month's Best Friends, along with the evolving genetic
behaviors of domestication also came certain genetically linked
physical characteristics that are seen across the spectrum of all
domesticated species: ie. that with domestication of any animal comes
changed head shapes, splotchy and variously colored coats, white
markings on the face, floppy ears, wagging tails. In as short as
several generations, the friendly wolves would have become very
distinctive in the changed appearance from their more aggressive
relatives. The most significant evolutionary developments that occurred
within those early transition prototype dogs was that they evolved the
ability to read human gestures.
As
dog owners, we take for granted the numerous and subtle ways that our
dogs can read our emotional state, intentions or other information
gained by their intent observations of us.
Although
commonplace to us, the ability of dogs to read human communicative and
social gestures is remarkable, special and sophisticated within the
animal kingdom. To quote and paraphrase Brian Hare of Duke University:
"Even our closest relatives — chimpanzees and bonobos
— can't read our gestures as readily as dogs can. Dogs are
remarkably similar to human infants in the way they pay attention to
us. This priority and ability accounts for the extraordinary
communication we have with our dogs. Some dogs are so attuned to their
owners that they can read a gesture as subtle as a change in eye
direction.
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"With
this new ability, the proto-dogs were worth knowing. People who had
dogs during a hunt would likely have had an advantage over those who
didn't. Even today, tribes in Nicaragua depend on dogs to detect prey.
Moose hunters in alpine regions bring home 56 percent more prey when
they are accompanied by dogs. In the Congo, hunters believe they would
starve without their dogs. "Dogs would also have served as a warning
system, barking at hostile strangers from neighboring tribes. They
could have warned or defended their humans from predators."
So,
far from a benign human adopting a wolf puppy, it is more likely that a
population of wolves adopted us. As the advantages of dog ownership
became clear, we were as strongly affected by our relationship with
them as they have been by their relationship with us. It seems quite
plausible when Dr. writes in his book "Dogs may even have been the
catalyst for our civilization."
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* * * *
Sources:
Dr.
Brian Hare is the director of the Duke Canine Cognition Center at Duke
University. He has written extensive research articles, contributed to
many publications and has co-authored the popular book
The Genius of Dogs.
And
Duke
University / Evolutionary Anthropology
1001 Front Street,
Morro Bay
Proceeds for book sales
fund scholarships.
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Come out to Woods Humane Society or click on the logo and take a
look through some of the 100+ adoptable dogs and cats waiting
for you to 'graduate' them into a new life.
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