Quite a chase!
Quite a chase!
Posted in wild dogs, wolves, tagged Armbruster's wolf, Canis, Canis etruscus, Canis mosbachensis, Canis variabilis, coyote, dire wolf, evolution, gray wolf, red wolf, wolves on August 18, 2016 | 3 Comments »
It cannot be overstated how much the discovery that coyotes are not as distantly related to wolves as we believed ultimately questions our entire understanding of the evolution of the Canis species.
The traditional understanding Canis species evolved from some form of Eucyon dog some six million years ago. Wang and Tedford, who wrote the most important book on the paleontology of the dog family, believe this was Eucyon davisi, which was the first of its genus to enter Eurasia. The genus Eucyon is where the common ancestor of the Canis dogs (including Lycaon and Cuon) and the South American wild dogs would be located. Eucyon dogs were small. Imagine them as being something like a black-backed jackal or a Hoary fox rather than a coyote.
Then, 5 million years later in the Southwestern US and northern Mexico, a coyote-like Canis evolved, which was called Canis lepophagus. This animal is sometimes considered the common ancestor of wolves and coyotes. It may be, but considering how close we now know wolves and coyotes are now, it’s not the most recent common ancestor. Canis lepophagus did migrate into Eurasia, where it either founded or is identical to Canis arnensis.
In Eurasia, several smaller jackal-to-coyote forms evolved. One of these was Canis estruscus, which then evolved into Canis mosbachensis (which is called Canis variabilis in China).
Ron Nowak believed the red wolf was an offshoot of this wolf that wound up colonizing North America and then becoming isolated from the rest of Canis mobachensis when the ice sheets expanded. There was also a competing view that the red wolf was actually a remnant version of Canis edwardii or Canis priscolatrans (which were probably the same animal). This animal was roughly the size of a red wolf, but Nowak rejected it as a red wolf ancestor because it lived too early for what he thought were red wolf fossils.
The Eurasian wolf species evolved mosbachensis-variabilis, but the two forms of wolf shared habitat and likely exchanged genes, making it very difficult
The coyote’s evolution was never clear. It was thought to have evolved out of Canis lepophagus. It was thought that lepophagus evolved into edwardii, and then it began to become more gracile and smaller, eventually becoming the now coyote. It’s now pretty clear that it evolved out of the Eurasian Canis lupus and not these endemic North American “wolves.”
It either evolved from the modern wolf, which evolved into roughly its current form 800,000 years ago, or it came from a late surviving mosbachensis-type wolves that were regularly crossing with modern wolves before they came into this continent. Maybe the remains that Nowak had been considering “red wolves,” were actually these ancestral wolves that were evolving into the modern coyote.
Maybe when this wave of wolves came back across from Eurasia, perhaps 50,000-100,000 years ago, it came into a world already dominated by a dire wolves, which already occupied the niche for large, pack hunting canids and this wave of Canis lupus evolved as the American jackal. After all, the bobcat is just a diminutive Eurasian lynx that found itself in a very similar position when it came into this continent, and it evolved to be a smaller animal that generally hunts smaller quarry than its larger ancestor. Of course, the modern bobcat didn’t reach its current form until about 20,000 years ago, but it still was forced to adapt to a slightly different niche than its Eurasian ancestor.
In literature on the paleontology of Canis, there is a heated debate as to how these animals all fit. The conventional view is that the wolf evolved from Canis mosbachensis/variabilis through Canis etruscus, which may be the same thing as Canis edwardii/ Canis priscolatrans. Wang and Tedford contend that the coyote and wolf split from Eucyon. The modern wolf evolved from Canis chihliensis, which was a large wolf-like canid. It spread into North America to found Canis armbrusteri, which then evolved into the dire wolf (Canis dirus) in North America and Canis gezi and Canis nehringi in South America. In the Old World, another offshoot of chihliensis gave rise to Canis falconeri, which the supposedly gave rise to the Xencyon, which is supposed ancestor of the dhole and African wild dog. Another view holds that the Armbruster’s wolf (C armbrusteri) is descended from edwardii/priscolatrans (which may be the same as etruscus). This lineage then gave rise to the dire wolf and the two sister species in South America, thus descending solely from North America wolves.
All of these ideas come from paleontology, and they pretty much are done without looking very deeply into the studies that are examining the DNA of these species. It is pretty obvious from that literature that the notion that coyotes and wolves split at the time of the Eucyon ancestor is quite wrong. For that hypothesis to work, African of wild dogs and dholes would have to be genetically closer to wolves than coyotes and golden jackals are. They aren’t.
But if the genome-wide analysis shows that coyotes are so much more closely related to wolves is true, then all these fossil and subfossil canids that are said to be the most recent common ancestor of wolves and coyotes simply aren’t. Instead, all of these species that are classified in Canis are likely a mix of evolutionary dead ends, like the dire and Armbruster’s wolf, or could be hidden ancestors of extant canids that aren’t wolves or coyotes.
For example, black-backed and side-striped jackals diverged from the rest of Canis and its allies at about the same time that Eucyon was diverging from Canis. It is possible that there are many relatives of these particular dogs that are hidden in this vast sea of Canis fossils.
The new discovery about the coyote’s split from the wolf also means that any remains of North American canid that are listed as coyote that date to 1 million years before present are not coyotes. What they actually were is a very good question.
We’ve spent a lot of time assuming that coyotes and wolves were quite divergent. We know now that they really aren’t, but when we look into the past at all the “wolves” and “coyotes” that came before, we see how this genus became so successful. It can easily evolve into big game-hunting forms, but the real success is in its ability to assume the size and shape of the generalist predator. Phenotypic plasticity is a wonderful thing for a lineage to possess.
But the real message of the new discovery about wolves and coyotes should be is a cautionary tale about paleontology. Paleontology is a wonderful science, and it makes amazing discoveries every day, but when its faced with a lineage of animals where phenotypic plasticity and tendencies toward parallel and convergent evolution are commonplace, it is bound to make errors. Paleontologists aren’t examining flesh and blood that can have its molecules tested for relationships. They are measuring anatomical characters and determining phylogenetic relationships based upon the similarities of these characters.
Which works well.
Until you get something like wolves and coyotes, where there are many ancient fossil and subfossil remains that look like they could be ancestors of either.
But the DNA says they aren’t.
And paleontology would have problem catching the inverse. There are many species that we’ve discovered only through DNA testing. African butterfly fish in the Congo and Niger basins look identical to each other, but they have been isolated from each other for 57 million years. I have yet to see this species split into two, but if they were mammals, you could bet they would be placed in distinct species in heartbeat.
Paleontology is missing some really important things we’ve since found out through molecular analyses.
And paleontologists know this.
They are working with the data they have, and by definition, it’s going to be more incomplete than genetic studies.
Science is provisional. Different disciplines and methodologies are going to come up with different answers. It’s pretty amazing that one genome-wide assay study can wipe out so much literature in paleontology.
These debates have been raging for years.
And it turns out that everyone was actually wrong.
Update 21 August 2016: It turns out that I missed a paper that actually did some limited DNA analysis and found that Canis nehringi was pretty much a South American dire wolf, as in it was likely the same species as the North American dire wolf. Canis gezi, however, was more closely related to the modern maned wolf and had been incorrectly identified as a wolf. So let this stand as a correction to the error above.
Any time someone from the Lower 48 goes to Alaska, the instant question that comes up on return is the traveler encountered a wolf.
The answer for me is simply no, and I knew fully well there were very low odds of me seeing a wolf. I live where there are tons of coyotes, and I see one about every six months. They are very good at keeping themselves hidden from people, and from what I’ve read about wild wolves, it is even more true about wolves.
My best chance at seeing a wild wolf was at Denali, but there is a catch to that story.
Denali National Park is roughly the size of Massachusetts. It’s full of moose, Dall sheep, caribou, beaver, and porcupines.
You’d think that place would be full of wolves, but it’s not.
In fact, a place that size really can’t hold as many wolves as it does wolf prey. Because wolves are top predators, they just can’t exist in such large numbers, and that fact is true regardless if you’re talking about wolves in Denali, cheetahs in Namibia, or lions in the Gir Forest.
So even in the best of times, there would always be just a few wolves roaming the park. They would be laid on pretty thinly on the land.
But these are not the best of times for wolves in Denali.
The traditional “buffers” that have been set up near the park that prevented legal wolf hunting and trapping near the park were lifted in 2010, and the wolf population went from 147 wolves in 2007 to 49 wolves in 2015.
49 wolves over a land the size of Massachusetts.
49 is still more than the number of wolves living in actual Massachusetts, which may be 0 wolves. It may not be, though. One was killed in Massachusetts in 2008, and one or two could be lurking somewhere in the Berkshires, where they may mistaken for big coyotes.
But 49 is roughly a third of what the population was nearly a decade ago. My chances of seeing a wolf in Denali were 45 percent in 2010. They were 5 percent in 2015.
One of the best things I did at the park was take a hiking nature tour. My tour guide was very well-informed about wolf issues, and she told us about a wolf following one of her tour groups. There was no fear involved, but when someone in the party pointed out that a wolf was following them, she was certain it was a dog. She was very surprised to see that it was a wolf, and it was close.
The wolf ran off, of course.
But she also told the story of what happened to the East Fork wolf pack. This is the famous wolf pack that Adolph Murie studied. They were the wolves that were featured prominently in The Wolves of Mt. McKinley. This was the pack to which Wags, Murie’s tame wolf belonged.
Right now, the pack exists as only a single female. Her mate was killed on state land near the park entrance. She also had a litter, but I’ve not been able to find out what exactly happened to them. (I was there just a few days after this story came out on Alaska NPR).
I understand that Alaska has to balance interests between outfitters, who want predator control and liberal predator hunting allowances, and the desire of the American people to have relatively intact ecosystems in our national parks.
I get it.
I get that Canis lupus isn’t an endangered species worldwide, and it certainly isn’t an endangered species in Alaska, where the species is still going strong.
But it seems just a little perverse that we cannot maintain those buffers once again. I came thousands of miles to see wilderness where wolves might be.
I am okay with knowing they might be. I don’t have to see them. I just need to know they are there.
We had a small enough tour group that the guide and I got to talk about wolves a bit. She talked about her cocker spaniel and how that dog was far more rugged than she looked. The dog had been on many back country trips, and she wondered how closely related her spaniel was to those wolves.
But still far enough away.
One of the pleasures of my Alaska trip was meeting Nick Jans. Nick Jans is the author of A Wolf Called Romeo, which is the story of the black wolf that came out to play with free-running dogs at Juneau’s Mendenhall Glacier.
I may have written a few things on Romeo on this blog before. He was just that fascinating an animal. Most wolves want to off the dogs they encounter. This one decided to become friends with them and even tolerate the humans who came with them.
The book is a wonderful discussion of wolves and dogs and people and what they truly mean to us and what we mean to them. It also tells the story of an odd wolf, who lived out six incredible years running and playing with the local domestic dog contingent.
The story does not have a happy ending, but the story of a wolf coming to trust people and dogs is something so amazing that you would have to look into the fiction of Jack London to find something even remotely similar.
But this is a true story.
If you would like to know more about Romeo, Jans gave a talk on the ship about the book that was an abbreviated version of this one:
My friend Bronwen Dickey wrote a review of the book in the New York Times. I just happened to have been the one who mentioned the book to her over two years ago, and I guess I played a tiny role in getting this book the wonderful review it received.
I received a copy of The Giant’s Hand, which is Jans’s new collection of short stories about life in the Inupiaq Village of Ambler and his experiences in Alaska’s far north.
The prose in each of these stories is so beautiful. He really can capture the essence of a place with words in a way that very few modern writers are able to match.
I particularly love the stories that include the exploits of Clarence Wood, an Inupiaq hunter and wolf trapper. He is a man of particular genius about the land and its wild inhabitants, but his way of phrasing things is just so perfect if a bit eccentric.
My favorite is: “Too much think about bullshit. That’s what makes you nervous.”
I think I may have to put this on a rock somewhere.
My favorite story in the book thus far is “Crossing Paths.” It is a kind of future warning about Romeo. In the story, Jans meets a red fox near his home, and wanting to get to know it better, he starts leaving out bits of food for it. Things go well until a neighbor shoots it for fear it might be rabid.
Jans has a philosophical discussion in the story about how much wild even Alaskans are willing to tolerate. The truth is that everyone has some limit.
Romeo was not fed to bring him near to humans. He merely came by to socialize with dogs and a few select people.
But Romeo wound up like that poor red fox in the arctic. He wasn’t taken because there was a fear he might be rabid. He was killed by two poachers who just wanted to cause trouble.
As a species, we have a very odd relationship with the wild. We admire it. We want to be part of it. But we also want it to be on our terms.
Like it or not, we’ve long since left the garden. We can only be visitors here, but some of us can truly be at home for a while.
And that’s the best we can do. Unfortunately.
It goes without saying that this book is the best souvenir I’ve ever brought home. I mean I do have a t-shirt from the Chilkat Bald Eagle Preserve, but nothing can compare to this book.
This was the trip of a lifetime.
From the Charleston (WV) Gazette:
Hunters who use hounds know full well that sometimes dogs get lost or, worse yet, killed.
It’s a nightmare scenario, one that can cause even the most pragmatic dog owner to wake up shaking and drenched in sweat.
Few nightmares, however, could be as harrowing as the real-life ordeal Larry Harrison and Scottie Derrick went through during an August dog-training trip to Michigan’s Upper Peninsula. The two Charleston-area men sent 10 beagles into a jack pine forest to run snowshoe hares. Eight of the dogs ended up dead, torn apart by wolves.
“It was the worst thing that’s ever happened to me in 30 years of running dogs,” said Harrison. “I wouldn’t want anyone to see what we saw.”
Harrison, Derrick and friend Jim McGuire of Jackson, Ohio, had taken their dogs to the Upper Peninsula to get them in shape for West Virginia’s upcoming rabbit season.
“Snowshoe hares are bigger than our cottontails, and you can more easily train dogs to their scent,” Derrick said. “The first three days we were there, we had a great time. But that last morning it all went bad.”
Just 15 minutes after the men released their dogs, the pack went strangely quiet.
“We could see from the GPS that one of Larry’s dogs was out of the pack, so we went looking for it,” Derrick recalled. “We got within 40 feet of it, but we still couldn’t see it. The GPS kept varying. We thought she was just shy and staying away from us.”
After a few minutes’ more searching, the men found the dog’s body.
“I couldn’t believe what I was looking at,” Harrison said. “There wasn’t much left but the rib cage. We thought from the GPS that she was alive, but as it turned out the wolf must have been carrying her around while we were searching.”
With one dog known to be dead, the men looked for the rest of the beagles.
“We found the one, and then another, and then another, and then another, all dead,” Harrison said.
Shortly after finding the fourth dog’s body, the men caught a fleeting glimpse of one of the wolves.
“I looked up and saw a wolf pop out of the brush, about 40 yards away from us,” Derrick said. “McGuire yelled at it, and it was gone in a blink.”
Derrick estimated the wolf’s size at 120 to 150 pounds. “It was bigger than the biggest German shepherd you’ll ever see,” he said.
The wolves – Derrick and Harrison believe there were four to seven of them – killed eight beagles and injured another in what Derrick calls “the blink of an eye.”
“In 15 to 30 minutes, there was nothing left,” he added.
None of the men were aware that wolves might pose a threat.
“We knew there were coyotes in the area, but I hadn’t heard anything about wolves,” Harrison said. “I’d been going up there for 16 years, and the worst thing that had ever happened was the time a couple of our dogs got messed up by a porcupine.”
After the attack, the men started asking around about Upper Peninsula wolves. What they found left them determined never to return to the area.
“Michigan’s wolf management plan calls for a population of about 200 to 300,” Derrick said. “The population right now is estimated at 670 or so.”
Pressure from animal-rights groups has hindered Michigan wildlife officials’ efforts to reduce the population through hunting. A hunt will be held this fall, but will be halted after 43 wolves are killed.
“I don’t think any of us are going back,” Derrick said. “There’s too much risk to the dogs. If there’s a chance for something like that to happen again, we probably should just stay away.”
This story is certainly a tragedy, but I thought it was fairly common knowledge that there were a lot of wolves in the UP of Michigan. If you’re going to run hounds in wolf country, this is a risk that is always there– especially if they are little rabbit beagles.
I seriously doubt the wolf weighed as much as the hunter claims. The average weight of a Great Lakes wolf in the neighboring state of Wisconsin is 60-75 pounds, but a wolf is built differently from a dog. They have much longer legs than a dog of equivalent weight, which would be a golden retriever. One of these wolves might be 30 inches at the shoulder, but a 75-pound golden retriever would be only 24 inches at the shoulder. Add the thick wolf coat, and you can get the impression that a wolf is a lot larger than it actually is.
I also find it a bit strange that these beaglers didn’t know that there were snowshoe hares in the high Alleghenies of West Virginia. There aren’t as many as there used to be, but the state does have a snowshoe hare season.
So they can run their beagles after hares without ever having to worry about wolves.
I don’t think anything can be done to stop wolves from killing hounds. Hounds are run at a distance from their owners, and if you’re in wolf country, there is a chance they will run into a wolf pack. Wolves usually fear people, so if the dogs are ranged close in, there is less of a risk. But if you’re using hounds the way Americans like to, wolf and dog conflict may be impossible to mitigate.
It may mean that the only way to avoid a wolf attack on beagles is to run them in the Alleghenies and forget the Great White North of the UP.