The DEVILS of TASMANIA: Vicious and Sick
"No one is really sure exactly how the cartoon character Taz originated. Some theorize that it may have been an inspiration of Errol Flynn, a native Tasmanian and a 1930s star of such movies as The Adventures of Robin Hood (1938). His father, T.T. Flynn, was a professor who did some of the first studies of the Tasmanian devil's biology. "One story is that a producer from Warner Bros. saw a devil in a traveling zoo," says Nick Mooney, a wildlife biologist for Tasmania's Department of Primary Industries, Water and Environment. 'The animal was driven crazy by confinement and was racing around in its cage, sort of like in the cartoon.' "
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Tasmanian Devils originally ranged through much of Australia (not fully clear), but some 400 years before European colonization began in 1788, came to be restricted the large Southern Island that gave their name. Tasmania would be the 42nd largest U.S. State after S. Carolina and before West Virginia at 26,421 square miles. Put another way, Tasmania is just over 2/3 the size of the whole of Ireland.
The Devil is the only remaining carnivorous marsupial (after the disappearance of the stripey marsupial wolf, or Thylacine last in captivity in Hobart, capital of Tasmania, in 1936). Marsupials, with pouches, are a sub-class of mammals (oh, excuse us!, infraclass, claims Wikipedia in their tedious, been-to-college vernacular).
The Devils were so named by Europeans for their ferocity, and trademark piercing screams. The strongest bite among any mammal, it is said, and reportedly a real threat to livestock. The size of a small dog, it's meat is said to taste like veal. Malevolent toward one another, they are surprisingly tolerant of wildlife officials, and often rest calmly when physically handled. But all is not well.
The poor Devils now mostly have a hideous transmissible cancer on their faces(!) and mouths; they contract this from biting into one another's faces (which they spend a lot of time doing), and the population may be about 80-90% down according to the worst estimate. This horror dates to around 1996 and its origins are unknown; infectious cancers are exceedingly rare and there are only probably three such types in the world. Of course, frequently biting into the large cancerous facial lesions of other infected Devils makes potentially every one of them a member of the at-risk population, regrettably.
Curiously the cells transmitted are not those either of the infect-ing Devil or the infect-ed; but of a Devil from around 1996 who somehow caught the ailment and is long deceased (Devils survive only three months with this scourge, not being able to eat when the fast-growing tumors expand to obstruct their mouths). If they are thus alien tissue, why don't their bodies reject the alien cancer cells? That's what most animals would do! Well, Devils on Tasmania are almost genetically identical and no one knows the reason for that; the result is that their immune systems don't recognize the cancerous cells of that long-deceased infected relative as foreign, and just accept the wretched infection as if their own tissue.
But wait! Tasmania is big enough, you see, that the population in the Northwest is just different enough genetically, that a Devil named Cedric from there did reject cancer cells and this meant in a nature series that I saw, cue the lights, there is hope and we will beat this thing! Hollywood ending, as Cedric points the way!
Except, uh, that Cedric later caught a mutant form of the cancer, or at any rate was somehow infected by December 2008. They have cut out the tumors in order to (maybe) save Cedric's life, but the hope that Cedric brought has dwindled. There is no durable strategy for the wild Devils now, except by quarantining tiny, uninfected populations, for example, in a fenced-off area of the island (Tasman Peninsula), also on an island nearby, and through maintaining captive (zoo and other) populations. Hobart, which housed that last marsupial wolf, has stepped up to support a captive population.
To review: the entire population is at risk, there is no cure and none really expected (even though post-operative Cedric may be still alive), and substantially all Devils in the wild are slated to die in perhaps 10-20 years!
If every individual in the wild expires, then presumably captive Devils can be reintroduced after a time. But first one must make quite certain that the contaminated wild ones are all good and dead, not one survivor, ghastly as this is. It complicates things further that Devils also eat carrion; there is little doubt they would eat a deceased Devil and there may be risk of infection there as well; little is known. In incidentally, they typically live perhaps eight years in the wild, but the longevity world record is not known.
Something already wiped out much of their population in (presumably) epidemics of 1909 and 1950, by the way, and they obviously recovered. They are important to Tasmania incidentally in controlling the red fox, an appalling threat to the island introduced by "ecoterrorists" in 2001. Tasmania is over 1/3 covered by parks and refuges, and many of Australia's vanished animals live now only the island (what kind of awful person would introduce foxes intentionally into the fragile ecosystem is difficult to imagine).
Warner Brothers, responsible for the undersigned's logo and the wonderful Taz character has stepped up to offer support, as has Ted Turner. In the Northwest, the population is still little-affected by the way, so there remains a flicker of hope that they could somehow be resistant, despite Cedric's predicament. Maybe. There is now talk of fencing off the entire Northwest; no one seems to know if that is realistic.
Save the Tasmanian Devil's site is http://tassiedevil.com.au/. If you are in a position to help, please do so. In any case, thank you for reading, and don't be afraid to tell others.
-O.T.
















This is incredibly sad. I had no idea the Tasmanian Devils left were suffering this form of cancer. No idea at all.
Thank you for bringing it to our attention, and for the links - especially that last one.
This is a great essay. Rec'd.
September 19, 2009 5:47 PM | Reply | Permalink
Thanks, LisB. I myself had no idea, had no idea at all until very recently. Tough break for screaming carnivores, and I'm sorry to publish a sad one, but it's worth knowing about, I reckon.
One of these evenings, BTW, you might wish to join us in the chat room; it's not for every body, but who knows. Give it some thought. Anyway, thanks a lot for the comment and the rec, very sincerely.
O.T.
September 19, 2009 8:04 PM | Reply | Permalink
The chat room? Oy...I dunno, OT. I've heard some really bad things about that place.
;)
September 19, 2009 8:12 PM | Reply | Permalink
the devil appears in the details.
September 19, 2009 8:28 PM | Reply | Permalink
Very interesting piece, OT. I'm thinking about the people studying this (as well as the poor devils). How frustrating it must be for them to come to the realization that they probably can't do a thing about it--except to corral off those animals unaffected so far. And it's possible even that isn't enough.
I would say this is the process of evolving, but that would be close to "evolution", and we know that's nothing more than a flawed theory.
September 19, 2009 9:19 PM | Reply | Permalink
Don't forget the aborigines gave them a real push by wiping them out on the mainland 650 years ago, BTW.
I suppose they had their reasons. Must be pretty hard to raise animals in their presence.
September 20, 2009 3:29 AM | Reply | Permalink
Yeah I have known of this for a couple years and I am heartbroken over it. I was hoping that humans would figure out a way to stop the spread of it but to no avail.
I am glad plans are being made to reintroduce them into the wild...at least there is a small silver lining there.
September 19, 2009 9:25 PM | Reply | Permalink
Migwetch, OT.
Tasmania has one of the most delicate ecosystems. Highly specialized, shall we say. It's a sad state of affairs, but, there is hope in the offing with the captive breeder program. Sometimes humans rock.
September 19, 2009 9:42 PM | Reply | Permalink
Migwetch gayegiin, Flower, and Wigmetch for commenting.
I wanna say the humans rock who are doing everything they can to find a strategy for this, yes. And those humans who deliberately introduced the red fox to this delicate ecosystem in 2001 ought to be tarred and feathered.
September 20, 2009 3:49 AM | Reply | Permalink
Well thank OT, don't bite okay. We want to keep you around and healthy:)
September 19, 2009 9:58 PM | Reply | Permalink
Thanks, Synch! ;)
September 20, 2009 3:38 AM | Reply | Permalink
But from the sounds of it, with a limited gene pool to work with, the Tasmanian Devils might be up against it. This just might be the, proverbial, 'forces of nature' doing its thing and there might be nothing we can do to stop it.
September 20, 2009 2:23 AM | Reply | Permalink
It's interesting that they already had population crashes in 1909 and 1950. No one seems to know exactly what from.
Why *is* the gene pool so limited on Tasmania, too? It's the size of West Virginia; I don't know about such things but I would think as layman that would be enough t have some diversity. They *do have a small amount, with the distinction in part of that Northwestern population.
It should be possible this time to let everyone of them die in the worst case, and then reintroduce after a a waiting period a captive population. Problem is, still no gene pool and they'll still be vulnerable.
September 20, 2009 3:13 AM | Reply | Permalink
Thanks OT, for posting. I had not heard of this. Sad.
September 20, 2009 3:25 AM | Reply | Permalink
By the way, I had heard either. Just saw this nature show about two weeks ago and I was amazed. But they were all happy about Cedric, who has offered false or incomplete hope as it turned out. Thanks for visiting, Saladin.
September 20, 2009 3:32 AM | Reply | Permalink
This, BTW, is very similar to the situation with cheetahs - they went through a population bottleneck about 10k years ago, and are now essentially all inbred clones. They are so similar that the immune system of one will apparently not attack the cells of another, much like the Devil's cancer.
September 20, 2009 1:34 PM | Reply | Permalink
Yes, sounds exactly parallel. You know, like I had missed this point, but I noted above that the Devils had population crashes in 1909 and 1950. Nobody seems to know why, but let's say it was some kind of plague both times. Only ones with certain characteristics will have made it through those.
Those individuals who survived may have done so because of particularized and possibly similar genetics, and thus those crashes may be responsible for the near-identical genetics now.
This is what you are saying I take it; this had not occured to me.
Thanks.
September 20, 2009 2:16 PM | Reply | Permalink
I heard about this on PBS about 2 years ago, but thanks for the update with the information about mitigation efforts. I wouldn't have expected to see it here on TPM, more likely on a science or nature blog, but power to you for getting people interested.
September 20, 2009 3:08 PM | Reply | Permalink
Hello, SPQR, if you receive this. Appreciate your note; I just saw it by happenstance. I had *not* known anything about this subject, and was quite astonished, and some of the good people who signed in were very much in the dark as well.
Some of us have tried to broaden the scope of the dialogue (LisB is a leader in that I would say), and I understand Josh supports that: We are not just political people but a community in the one interpretation.
You will appreciate that given my avatar I could hardly not comment. But not too long ago I did something about the history of housecats, so indeed some of us have reached out. Unlike yesterday, when I urged a punch in the mouth for delusional egoist-propagandist Chris Wallace, a bit closer to home.
Again, thanks for commenting.
September 22, 2009 3:26 PM | Reply | Permalink