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Archive for August, 2012

Hell’s welcome committee

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What exactly do we know about Obsessive-Compulsive Disorder in dogs?

Mark Derr has a new post up about the recent study on OCD in several breeds, which manifests itself as tail-chasing.

In the end, the research shows just how complex an issue OCD is in domestic dogs.

We don’t know how it is inherited, though there is likely some sort of genetic basis behind the tail-chasing behavior.

It’s another one of those issues in which the more we learn, the less we know.

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Jackal is a meaningless term

A side-striped jackal (Canis adustus), the jackal no one talks about.

We’ve always called the smaller wild dogs in the genus Canis jackals.

Historically, there were four species of jackal:  the golden (Canis aureus), the black-backed (Canis mesomelas), the side-striped (Canis adustus), and the Simien (Canis simensis).

Some authorities considered they coyote (Canis latrans) to be a jackal, usually called “the American jackal.”

At one time, they were all placed in the genus Thous.

This, of course, assumed that these animals were all closely related to each other.

However, as we’ve looked at DNA analysis, the relationship between jackals shows that the term “jackal” is actually quite meaningless.

In 1994, an mtDNA study revealed that the Simien jackal had certain mtDNA sequences that were more similar to wolves than other jackals. It was thought to be a relict population of primitive wolves that came into Africa during the Pleistocene.

And from that time forth, the English name of this species was change to “Ethiopian wolf.”  I don’t call it anything else.

However, as more work was performed on jackals, certain facts became evident.

Initial studies of black-backed, side-striped, and golden jackal mtDNA revealed that black-backs in East Africa had huge variances in their mtDNA. Golden jackals had mtDNA that was most similar to coyotes and wolves, while black backs and side-stripes were more similar to each other.

And then the phylogeny of the dog family was drawn from a high-quality sequencing of the dog genome revealed that golden jackals were much more closely related to coyotes and the wolf and domestic dog species than the Ethiopian wolf was. We still call them Ethiopian wolves, even though golden jackals are more closely related to actual wolves than those animals are.

The other issue revealed through this research was that Canis, as it is traditionally classified, is a paraphyletic genus. Modern taxonomy is generally concerned with classifying animals according clades. Clades are, by definition monophyletic. That is, they contain all the animals that descend from a particular lineage.

The dog genome research revealed that two species that are never traditionally classified as being part of Canis, the African wild (Lycaon pictus) and the dhole (Cuon alpinus), actually should be included there.  It turns out that black-backed and side-striped jackals are more distantly related to the rest of Canis than these two species are.

And if we classify Canis with all the jackals, the Ethiopian wolf, and  the wolf and dog species and leave out the dhole and African wild dog, we’ve created a paraphyletic genus that is not useful to modern taxonomy.

Some have suggested giving the two endemic African jackals their own genus.

And this would make Canis monophyletic without including the African wild dog and dhole.

However, the genus that would remain would include several species that are all chemically interfertile with each other (at least in theory). Species complexes exist throughout that part of the Canis, and delineating species is very difficult the species in this lineage.

Although Robert Wayne at UCLA has suggested that black-backed and side-striped jackals might be able to interbreed, no one has confirmed a hybrid between these two species. African wild dogs might be able to hybridize with dholes, but because they live on different continents and because they are both fairly endangered, no one has attempted to cross them. (There are persistent rumors that dholes can cross with domestic dogs. One dog breed, the Bangkaew dog from Thailand, is said to have derived from a dog/dhole cross. However, I don’t believe this claim has ever been tested through DNA analysis.)

All this research has revealed that how we have traditionally thought about the dog family is probably wrong.

The golden jackal is actually a primitive offshoot of the wolf lineage, just as the coyote in the New World is. The Ethiopian wolf is an even more primitive offshoot.

The two endemic African jackals are the two oldest living species in the Canis lineage. They are even more distinct from this lineage than dholes and African wild dogs are.

We do not have a good replacement word for jackal.

I’ve suggested that we call golden jackals “Old World coyotes” almost as a joke.

But I don’t have a good name for either of the two remaining jackal.

Because black-backed jackals are so scrappy, I’ve even suggested that we call them “wild Jack Russells.”

Whatever we call them, the term jackal, if it’s used to reflect close relationships between species, is utterly meaningless.

With the exception of the two found only Africa, it doesn’t refer to any animals that have a close relationship with each other.

It’s just a term we use for smaller wild dogs that are in some way related to wolves.

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Bigfoot in Northeast Ohio?

Source.

You don’t even need to think very hard to see that this is a person in a hoodie.

And the cameraman on the ATV has rather skillfully manipulated the camera just as the supposed bigfoot comes directly into view so that your eyes can’t discern that this is a person in a hoodie.

But I’m sure the crew from Finding Bigfoot will be convinced that it’s real.

I almost guarantee it.

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Dr. Pol is coming back

And I couldn’t be happier.

Source.

Dr. Jan Pol is a Dutch-born vet who practices in rural Michigan.

He has a mixed practice that includes dogs and cats and livestock.

I really liked this show when it came out last year.

There just weren’t enough episodes!

Dr. Pol is the sort of country vet that used to be quite common in this country.

They worked largely for farmers, and because they tried to stay up-to-date on the latest animal husbandry practices, they could impart lots of practical knowledge onto producers. This practical knowledge increases both the welfare and productivity of livestock.

Some people have complained about how graphic this show really is.

Well, actual agricultural enterprises are not always clean affairs. Prolapsed uteri in cattle are not the pretties things to see.

But they happen whenever people breed cattle.

This show really makes you appreciate all the hard work that goes into livestock management and production.

It makes you understand where your meat comes from. It didn’t start out in a plastic-wrapped container at the supermarket.

There are very few reality shows about rural people and what they actually experience. Some of them are cartoonish, encouraging the reality “stars” to act like a bunch of backwoods hicks for ratings.

I can’t stand these shows.

The Incredible Dr. Pol isn’t one of them.

The farmers are portrayed as thoughtful people who actually do want what is best for their animals and their enterprises.

Dr. Pol comes across as a caring, well-educated professional. He also understands the importance of being economical in his advice.

His livestock clients need to spend money and resources wisely. They can’t waste money on a procedure that might not work or wind up costing more in the long term.

And at 70 years old,  he’s awfully fit!

And if you see what he does, you can see why. He has to manhandle all sorts of recalcitrant livestock on a daily basis!

Dr. Pol will make you appreciate agriculture and veterinary profession even more.

So I am very happy that The Incredible Dr. Pol is returning to Nation Geographic Wild this Saturday.  The second season premiers on that network on the 25 at 10 PM.

I’m very glad that Nat Geo Wild has chosen to renew this show for a second season.

There just aren’t that many good reality TV shows.

And the ones about rural people are often just caricatures.

This one is not.

This one shows rural America as it is.

It’s not perfection.

Farmers don’t always have it easy.

But without them, we’d have no civilization at all.

The farmer is at the foundation of our advancement as a species.

And people like Dr. Pol try to make their jobs easier and more efficient.

That’s the real message from the show.

And why I’ll be tuning in this Saturday.

 

 

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Pack goats

Source.

John Mionczynski is the Adolph Murie of bighorn sheep. His studies of radio-collared bighorns have been ground-breaking, and he was among the first to document that selenium deficiencies– caused by the abundance of certain plants in the sheep’s habitat– were causing population decreases.

He also pioneered the use of pack goats to carry camping supplies in rugged terrain.

Very interesting fellow.

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The problem of dairy cattle

One of the most bizarre things I’ve seen animal rights activists throw fits about are dairy cattle.

Now, one can make the case that dairy cattle are meant to be on pastures, and maybe they shouldn’t have docked tails. And maybe the nutritional value of dairy is something we ought to question.

However, one thing that the animal rights people worry about is that dairy cattle never get to mother their own calves.

This is supposedly the absolute worst thing that can happen.

It is a major feature of this piece by a vegan activist writing on a “farm sanctuary” ( read: food hoaders’) tumblr. The piece is an ode to a dairy cow that has recently, which in my part of the world would not be something that anyone would read or write without bursting out in riotous laughter.

Anyway, here goes:

I hope you will honor Sadie’s memory. She is a former dairy cow. She never nursed her own calves. Her only value? Her milk, meant for her growing calf.

Animal Place gave her an amazing seven years of life. She lived it with dignity. I am beyond honored to have been included in her circle.

She never deserved the hand dealt her.

You can help. Drink almond milk. Try coconut ice cream. Slap some soy cheese on your sandwich. Transition to a vegan diet and embrace compassion and kindness.

Never mind that monocultures of soy have a disastrous ecological effects and can destroy small farmers in the developing world.

And never mind that intelligent cattle rearing could be a solution to soil conservation and to climate change crises.

The real issue is that dairy cattle have been selected to be terrible mothers.

If you know anyone who has raised any kind of beef cattle, the cows are super protective of their calves.

When they are first born, it can be dangerous to approach a mother cow and her calf. It’s almost always dangerous for even familiar dogs to approach the pair.

That’s because she has very good mothering instincts, and there have been no selection pressures to produce cattle with weaker mothering instincts.

They are still very much like their wild aurochs ancestors.

Dairy cattle are quite the opposite.

When normal cattle are separated from their calves, they get quite stressed and start bawling for hours and hours.

This always happens when beef cattle are weaned. The mother cows don’t like to be away from their babies, so they try to call them back.

However, if a dairy cow got that upset and stressed when she became separated from her calf, she would be a terrible milk producer.

And because dairy cattle almost always have their calves taken from them, there has been an inadvertent selection pressure for a cow that has terrible mother instincts.  If she doesn’t have a strong instinct to bond with her calves, she’s not going to be stressed when she’s producing milk.

Temple Grandin, a livestock expert, writes that a lot of this selection may have come from the desire to produce the most calm dairy cattle possible:

There is a need to select cattle and other animals to have a calm temperament. However over selection for any single physical or behavioral trait can cause problems (Grandin, 1998). It is probably a bad idea to select for the absolute most calm animals. Doing this might cause problems. For example, the Holstein dairy cow is very calm but she is a poor mother. Over selection for the calmest might cause a loss of other beneficial traits such as mothering ability or motivation to forage long distances on a pasture.

Now, I don’t think dairy is necessarily best use of cattle. I don’t consume much dairy in my diet. I get most of my calcium from almonds and broccoli.

I generally avoid milk because it’s too high in carbs. And regular carb consumption makes my ass jiggle. It also takes away all my energy. I don’t think as clearly. I’m also much more prone to moodiness when I’m eating lots of starchy foods.

But I do eat a lot of beef, and if we’re smart about our cattle rearing, we can actually mitigate so many ecological problems.

This is yet another example of where the animal rights movement is in conflict with possible solutions to real ecological issues, and the way that the animal rights fanatics frame it, ecology always loses when it comes up to emotionalist appeals about the “sanctity” of an individual animal’s life.

Holstein, Holstein-Frisian, and British Frisian cattle are truly specialized animals.

They would not exist without human intervention.

If they were left to be wild, they would hardly ever raise calves to maturity, especially if predators are around. My guess is these cattle would regularly tear their pendulous, over-sized udders and teats if left in a more natural situation.  They are certainly more prone edemas of the udder.

In breeding super milk producing cattle, we have produced something like a bovine equivalent of a bulldog.

Like the bulldog, these animals would be next to impossible to produce without lots of human intervention.

I use very little dairy in my diet for my own health reasons.

Humans have only recently evolved the ability to digest lactose. Lactose tolerance in Europeans is at its highest in the region of Europe that was home to the Funnel Beaker region, which is about where my ancestors came from. The Funnel Beaker culture of north-central Europe was the first area where dairying became established in Europe nearly 6,000 years ago.

We’ve done pretty well without consuming dairy, even if a lot people can now digest lactose as adults.

So yes, there are problems with dairy cattle.

But one of them isn’t that the cows go into hysterical fits when their calves are removed from them.

And I am entirely fine with the problem of dairy being solved through consumer choice.

If you find that you can do well without dairy in your diet, there is no need to buy it.

I am not in all in favor shutting down dairies. The cows are generally well-treated and not stressed. If they were truly stressed through general operations, they wouldn’t produce milk. And yes, there are bad actors out there, just as there are in any industry.

But excessive moralizing about how much dairy cattle mothers suffer when their calves are removed isn’t at all helpful.

It makes someone look silly.

It certainly doesn’t make a person look like someone we should take seriously about issues relating to the environment and animal welfare.

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