Dan Dennett and Andrew Brown have a quick chat

July 23, 2013 • 6:39 am

Here’s our favorite avuncular atheist, Dan Dennett, engaging in a five-minute debate at the Guardian site with our most despiséd faitheist, Andrew Brown. The topic is  “Do the New Atheists have any new ideas?

It’s short and sweet, and Dennett admirably keeps his cool. (Notice, though, the piercing gaze that lasers out of Dan’s Santa-like visage when Brown says something stupid.)

Among Brown’s amusing claims are that there’s nothing new in New Atheism (Dennett’s response is that “What we [the New Atheists] gave [the American public] was permission to declare their lack of interest in religion”); that New Atheism is a “quasi-religion” that engages in “heresy hunts” (Dennett really takes Brown down on this one); and the assertion that if moderate religionists provide cover for more extreme ones, as some New Atheists claim, so the”good atheists” provide cover for the “bad atheists” (e.g., Communists).

Oh, and the readers’ comments are heartening.

Don Prothero guts Stephen Meyer’s new creationist book

July 23, 2013 • 5:05 am

The Lord hath delivered Meyer into Prothero’s hands.

If you’re a regular here, you’ll know about paleontologist Don Prothero, who wrote one of my favorite “evidence-for-evolution-and-anticreationist” booksEvolution: What the Fossils Say And Why It Matters (read it!).  He’s a crack paleontologist and a superb science educator, as well as an inveterate debunker of creationism (he was one of my co-arguers on the “Conspiracy Road Trip: Creationism” show).

It’s in the last role that I want to highlight Prothero today, for two days ago he published on Amazon a scathingly informed review—an unmitigated pan—of creationist Stephen Meyer’s new book on the Cambrian Explosion, Darwin’s Doubt: The Explosive Origin of Animal Life and the Case for Intelligent Design. Called “Stephen Meyer’s Fumbling Bumbling Cambrian Amateur Follies, Prothero’s one-star assessment is a classic.

It’s long, but I’ll give a few excerpts. First, the overview:

Stephen Meyer’s first demonstration of these biases was his atrociously incompetent book Signature in the Cell (2009, HarperOne), which was universally lambasted by molecular biologists as an amateurish effort by someone with no firsthand training or research experience in molecular biology. (Meyer’s Ph.D. is in history of science, and his undergrad degree is in geophysics, which give him absolutely no background to talk about molecular evolution). Undaunted by this debacle, Meyer now blunders into another field in which he has no research experience or advanced training: my own profession, paleontology. I can now report that he’s just as incompetent in my field as he was in molecular biology. Almost every page of this book is riddled by errors of fact or interpretation that could only result from someone writing in a subject way over his head, abetted by the creationist tendency to pluck facts out of context and get their meaning completely backwards. But as one of the few people in the entire creationist movement who has actually taken a few geology classes (but apparently no paleontology classes), he is their “expert” in this area, and is happy to mislead the creationist audience that knows no science at all with his slick but completely false understanding of the subject.

Meyer’s sins include these:

1. Ignoring the length of and precursors to the Cambrian “explosion”. (All indentations are Prothero’s quotes.)

His figures (e.g., Figs. 2.5, 2.6, 3.8) portray the “explosion” as if it happened all at once, showing that he has paid no attention to the past 70 years of discoveries. He dismisses the Ediacara fauna as not clearly related to living phyla (a point that is still debated among paleontologists), but its very existence is fatal to the creationist falsehood that multicellular animals appeared all at once in the fossil record with no predecessors. Even more damning, Meyer completely ignores the existence of the first two stages of the Cambrian (nowhere are they even mentioned in the book, or the index) and talks about the Atdabanian stage as if it were the entire Cambrian all by itself. His misleading figures (e.g., Fig. 2.5, 2.6, 3.8) imply that there were no modern phyla in existence until the trilobites diversified in the Atdabanian. Sorry, but that’s a flat out lie. Even a casual glance at any modern diagram of life’s diversification (Figure 1) demonstrates that probable arthropods, cnidarians, and echinoderms are present in the Ediacara fauna, mollusks and sponges are well documented from the Nemakit-Daldynian Stage, and brachiopods and archaeocyathids appear in the Tommotian Stage–all millions of years before Meyer’s incorrectly defined “Cambrian explosion” in the Atdabanian.

2. Falsely implying that animal evolution during the Cambrian was too fast to be explained by natural processes. (Meyer is of course an exponent of Intelligent Design, and uses the “too-fast” argument to buttress the intervention of the Intelligent Designer, aka God.)

Meyer claims the 5-6 million years of the Atdabanian are too fast for evolution to produce all the phyla of animals. Wrong again! Lieberman (2003) showed that rates of evolution during the “Cambrian explosion” are typical of any adaptive radiation in life’s history, whether you look at the Paleocene diversification of the mammals after the non-avian dinosaurs vanished, or even the diversification of humans from their common ancestor with apes 6 m.y. ago. . . The Cambrian Period contains plenty of time to accomplish what the Proterozoic didn’t without invoking processes unknown to population geneticists–20 million years is a long time for organisms that produce a new generation every year or two. (Knoll, 2003, p. 193).

Yes, Don gives references.

3. Larding the text with errors and deliberate misrepresentations about phylogenetic trees, punctuated equilibrium, and modern discoveries bearing on evolution.

[Meyer] blunders through the fields of epigenetics and evo-devo and genetic drift as if they completely falsified Neo-Darwinism, rather than as scientists view them, as supplements to our understanding of it. (Even if they did somehow shoot down some aspects of Neo-Darwinism, they are providing additional possible mechanisms for evolution, something he supposedly does believe in!). In short, he runs the full gamut of topics in modern evolutionary biology, managing to distort or confuse every one of them, and only demonstrating that he is completely incapable of understanding these topics.

4. Relying on the intellectually disasterous “God of the gaps” gambit.

Even though ID creationists say that this supernatural designer could be any deity or even extraterrestrials, it is well documented that they are thinking of the Judeo-Christian god when they point to the complexity and “design” of life. They argue that if scientists haven’t completely explained every possible event of the Early Cambrian, science has failed and we must consider supernatural causes.
Of course, this is a lie. For one thing, Meyer’s description of the “Cambrian explosion” is distorted and false, since he deliberately ignores the events of the first two stages of the Cambrian. Secondly, this “god of the gaps” approach is guaranteed to fail, because scientists have explained most of the events of the Early Cambrian and find nothing out of the ordinary that defies scientific explanation. Only a few details remain to be worked out. As our fossil record of that time interval improves and we understand it even better, there will be nothing left for the creationists to point to that might require supernatural intervention. This is a losing strategy for them in every possible way.

Indeed, but it’s all the IDers have, for there is no positive evidence in favor of their position. They are perforce constrained to find their “evidence” for a designer in the things science has not yet explained. And when science does—when those missing fossils are found, or our understanding of early life improves—their faces should be red, but they’ll just move on to another gap. We’ll never understand everything, so there will always be room for Jesus.

And Prothero’s damning peroration:

In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. . . Some people with creationist leanings or little understanding of paleontology might find this long-winded, confusingly written book convincing, but anyone with a decent background in paleontology can easily see through his distortions and deliberate misunderstandings and misinterpretations. Even though Amazon.com persists in listing this book in their “Paleontology” subsection, I’ve seen a number of bookstores already which have it properly placed in their “Religion” section–or even more appropriately, in “Fiction.”

Now the Discovery Institute isn’t going to take this lying down: within a day they’ll assign their resident Jewish creationist David Klinghoffer to find reasons why Prothero doesn’t know his onions, is biased against Meyer, or is simply part of the great Darwinist-atheist-Hitlerian conspiracy against intelligent design. But each time the DI fails to listen to those who really know about the science, they further erode their credibility—at least among the fence-sitters.

IDers are crying in the wilderness and they know it, but that just makes them lie all the harder. After all, God is at stake.

h/t: Michael

The case of the dancing midges

July 22, 2013 • 12:37 pm

by Matthew Cobb

The UK has been basking in an unusually gorgeous summer for the last 10 days or so. Tomorrow the weather breaks with some welcome thunder storms predicted. So in case I don’t get another chance this year, I have just had my tea in our small garden – fromage de chèvre and salad, with a decent Bordeaux Supérieur from our local French épicérie, chez Ludo on Beech Road in south Manchester.

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I was getting gently sizzled in the evening sun, revelling in the wine and the warmth and the smell of the sweet peas:

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Then I noticed 5-7 dancing midges above my (empty) plate. The tiny flies were moving up and down, occasionally zooming into contact with each other, then resuming the dance. Every now and again the wind would blow them away and they’d take a few seconds to reconstitute their dance, in the same place.

This intrigued me. These dances are thought to be composed of male midges that are forming a ‘lek’ – a kind of dance floor where the guys strut their stuff. Female midges who are up for it will dive through the melée and find a male that suits their needs. The midges zooming in on each other will have been males who were checking out the sex/availability of another midge (probably through their cuticular hydrocarbons – sticky compounds on the outside of many arthropods, which both Jerry and I have studied).

So who do the ladies choose? In a 2003 paper entitled ‘Mating in a viscous universe: the race is to the agile, not to the swift’, Crompton and coworkers concluded that bigger is not better in the midge world: ‘the hypothesis that small males gain their mating advantage through acrobatic superiority is consistent with the observations reported here’.

But I was intrigued by where the males were dancing. They were always over my plate, about 30 cm above the surface. I tried to take a picture of this, but n’est pas Alex Wild qui le veut (not everyone can be Alex Wild), and you can’t see the midges at all. But you can see the plate.

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(The midges were slightly to the right of the chair, against the greenery. Honest)

And that turned out to be the key thing. If I moved the plate, the midges moved with it, dancing as they went. If I raised the plate, they moved too, keeping the same height. I called my daughter Lauren down, dragging her away from her computer (“Oh Dad, what is it?”), and she was equally amazed. It was very weird. It was like a magnet, she said. And it was. Wherever we moved the plate, the midges followed, completely unaware that they were being shifted around the garden.

I remember noticing this years ago, when I was in a garden and found a column of midges dancing over my head. I moved and the midges moved. I assumed this was something to do with heat/smell. Maybe this was to do with reflected light, or the smell of cheese or… what?

What are the males after? Is there any instrinsic advantage to occupying a space above a plate (maybe they think it’s a pool of water, so the females can lay their eggs in there?) or is it just some place where they can show off?

I’ve had a quick look online on Web of Science and on Google, and can’t find any answers. Do any readers have any ideas?

Ollie the cat (who scratched Jerry’s nose when he visited a while back) came to inspect what was going on, but he didn’t have any answers:

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Reference:

Crompton, B, Thomason, JC, McLachlan, A (2003), Mating in a viscous universe: the race is to the agile, not to the swift. Proc Roy Soc B 270:1991-1995.

Keep orcas in the wild, not in aquaria

July 22, 2013 • 5:55 am

Blackfish is a 2013 documentary movie about captive orcas (killer whales) at SeaWorld in Orlando, Florida. It centers on Tilikum, the infamous orca who killed three people (including two trainers) and is still at SeaWorld.  The documentary, directed by Gabriela Cowperthwaite, premiered at Sundance in Utah, and has received a lot of critical acclaim. It gets a 97% from the critics on the Rotten Tomatoes site, and Wikipedia says this:

Critical reception for the documentary has been mostly positive, with the Deseret News calling it “a gripping example of documentary filmmaking at its finest”. Twitch Film and The Hollywood Reporter both praised Blackfish, with both review sites arguing that the film gave “a persuasive case against keeping the species – and by extension any wild animal – in captivity for the purposes of human entertainment”. Film School Rejects gave the documentary a rating of B-, writing that it “never really offers anything new, but what it does feature is extremely important” and that it was “slanted in it view [sic]”.

The official site of the movie is here.  It has been picked up by CNN and will be shown there on October 24.

The movie’s thesis is that orcas suffer psychological damage, debilitation, and stress in captivity, some of which could have contributed to Tilikum’s rampages. I have to admit that I’m biased in favor of that idea, though my bias comes from more than simply biophilia: I’ve seen large captive sea mammals, such as those in the Shedd Aquarium in Chicago, showing signs of neurotic behavior, including repetitive swimming back and forth. Animals like seals, orcas, and beluga whales evolved to roam over hundreds of miles of open ocean, and I can’t help but feel that keeping them in captivity, even with medical care and lots of food, is an unfair imprisonment.  After all (and as I’ve said before), a Martian zoologist observing humans in prison would conclude that they’re healthy and well taken care of: a human zoo, so to speak. But none of those men would opt to stay in prison over gaining their freedom with all its uncertainties. Give an orca a path to the sea from its tank, and see if it comes back!

Some aquaria will argue that keeping such animals in captivity helps us better understand their biology, enabling us to conserve them better. But orcas, seals, and belugas are not endangered, and at any rate real refereed scientific publications from large aquaria or sea-mammal emporia are thin on the ground.  Let’s admit it: places like SeaWorld are in business for one reason: to make money, no matter how much they claim to be educational organizations. And yes, I’ll admit that some of the keepers and employees do love and care about their charges, but it doesn’t matter. Those charges should be swimming free in the sea.

But, as the New York Times reports, SeaWorld is fighting back, and might take legal action:

In an unusual pre-emptive strike on the documentary “Blackfish,” set for release on Friday in New York and Los Angeles by Magnolia Pictures, SeaWorld Entertainment startled the film world last weekend by sending a detailed critique of the movie to about 50 critics who were presumably about to review it. It was among the first steps in an aggressive public pushback against the film, which makes the case, sometimes with disturbing film, that orca whales in captivity suffer physical and mental distress because of confinement.

Magnolia and the film’s director, Gabriela Cowperthwaite, shot back with a point-by-point rebuttal in defense of the movie.

The exchange is now promising to test just how far a business can, or should, go in trying to disrupt the powerful negative imagery that comes with the rollout of documentary exposés. That kind of dilemma has surfaced with previous documentaries like “The Queen of Versailles,” which last year portrayed the lavish lifestyle of the real estate moguls Jackie and David Siegel, and even with narrative films like “The Social Network,” which took an unflattering look at Facebook’s Mark Zuckerberg in 2010.

Businesses accused of wrongdoing in films often choose to lie low, hoping the issues will remain out of the public mainstream and eventually fade away without much fuss. That’s especially true of documentaries, which generally have small audiences.

SeaWorld, advised by the communications firm 42West, which is better known for promoting films than punching back at them, is taking the opposite approach. By midweek, the company was providing top executives and animal caretakers for interviews about the movie and its purported flaws.

It was also deliberating possible further moves, which might conceivably include informational advertising, a Web-based countercampaign or perhaps a request for some sort of access to CNN, which picked up television rights to “Blackfish” through its CNN Films unit and plans to broadcast the movie on Oct. 24.

Among other things, SeaWorld claims that “Blackfish,” which focuses on the orca Tilikum’s fatal 2010 attack on a trainer, Dawn Brancheau, exceeded the bounds of fair use by incorporating training film and other video shot by the company. The company also contends that Ms. Cowperthwaite positioned some scenes to create what SeaWorld executives see as a false implication of trouble or wrongdoing.

There’s nothing a corporation won’t do to protect its profits. They also make the usual lame excuses for keeping these animals in captivity:

Since 1965, SeaWorld has kept and displayed dozens of orcas in parks here, in Orlando, Fla., and elsewhere. According to Mr. Taylor [SeaWorld’s general counsel] and other executives, at least 10 million people a year view some of the 29 whales now held. SeaWorld executives say that without access to the whales — which are now bred at the parks, rather than captured wild — humans would be denied a connection to large, intelligent animals with which many feel a bond.

“We’re deeply transformed by them, the killer whale is an animal that does that,” said Dr. Christopher Dold, SeaWorld’s vice president of veterinary services, who spoke at the company’s San Diego park on Wednesday.

Dr. Dold, Mr. Taylor and others point out that only one trainer has died in a whale encounter at SeaWorld parks, though Tilikum has been associated with three deaths. One of those was at another park, and one involved a man who somehow wound up in his tank at night.

Yes, we sequester dozens of large, intelligent mammals in captivity so we can be “transformed” by them! (And the coffers of SeaWorld are also transformed in a positive direction.) Is that reason enough to imprison these creatures? Can’t we be “tranformed” by Attenborough-like documentaries that actually show these animals in their natural habitats? Isn’t that actually better than watching these mammals do tricks in large bathtubs?

As I get older and more experienced as a biologist, the less justification I see for zoos and aquaria.  There are some valid reasons to have them: to breed endangered species to reintroduce into the wild, to keep the last few remaining individuals alive in species doomed to extinction (possibly to clone them one day), and the educational benefits of showing living animals to people, though I’m not sure how much this really helps conservation efforts. And, at any rate, those animals must be ones that are not traumatized by captivity, and those species are turning out to be fewer than we thought.

There is no justification for keeping orcas, beluga whales, and other sea mammals in captivity.  They belong in the wild, where they would be if they had a choice, but are simply exploited as cash cows for institutions and corporations.  I urge the readers to stay away from places like SeaWorld, where the animals are even asked to do tricks before a paying audience. It’s ineffably sad, and demeaning to these magnificent creatures.  We are the only species that enslaves other speccies to advance our social position.

I’ll end with an excerpt from the New York Times’s positive review of the film:

Seemingly supported by chilling video and the oral testimonies of two witnesses to Tilikum’s first attack in 1991, the trainers accuse SeaWorld of cover-ups and misinformation. Much of the footage is painful to watch: bleeding whales, flanks raked by the teeth of their fellow captives; a trainer crushed between two gigantic beasts with only his wet suit holding him together; another trainer dragged repeatedly to the bottom of a pool until he manages to escape. Providing context for this alarming behavior, researchers describe highly socialized, caring creatures used to living in thousands of miles of ocean and ill suited to theme parks where they may be subjected to repeated overnight confinements in dark concrete pens.

“If you were in a bathtub for 25 years, don’t you think you’d get a little psychotic?” Jane Velez-Mitchell, a CNN anchor, wonders in a clip that’s used in the film. Other signs of mental distress, like severe tooth and stomach problems caused by the whales gnawing on their enclosures, are described. But the film’s most harrowing moment occurs not while addressing Tilikum’s 2010 mutilation and killing of a senior trainer, Dawn Brancheau, at the park in Orlando, Fla., but in a face-to-face with a former whale hunter, the diver John Crowe. Tearfully recalling his traumatic capture of whale calves four decades ago in Puget Sound while their mothers howled pitifully (“We were only after the little ones”), Mr. Crowe seems haunted to this day by the unearthly sound of the animals’ apparent grieving.

Calmly and methodically countering SeaWorld’s contention that whales benefit from captivity — the Web site “Orcas in Captivity” places the current total at 45 — Ms. Cowperthwaite questions the advisability of exploiting mammals whose brains, the neuroscientist Lori Marino suggests, may be more complex than our own.

Show me the way to the next merocenose – the anal pedicel of a phoretic uropodine

July 22, 2013 • 5:50 am

by Matthew Cobb

What are these?

Beetle is roughly 3 cm long

Masters student Daniel Llavaneras spotted these odd structures on the back of a 3cm-long beetle he had captured in the Andes and preserved in alcohol. His initial assumption – like mine when I saw the picture – is that they were some kind of fungus, a bit like Robert Hooke’s famous 17th century illustration from Micrographia:

But when he looked closer, he could see that on the underside of the round structre there were eight pairs of folded up legs (those are the squiggly looking things):

Definitely not a mold!

As Daniel describes on his neat blog, he did the sensible thing (are you reading this, Jerry?) and took to Twitter asking what they might be. The answer came back that they were deutonymphs of a Uropodina mite. (A deutonymph, as any fule kno, is a non-feeding stage of some kinds of mite, which will then go through a final molt and turn directly into the adult.) (To bring the story full circle, Hooke also drew a picture of a mite, but not a uropodine deutonymph).

So if these deutonymphs aren’t eating, what were they doing on the back of the beetle, and what’s the stalky thing?

Many small animals hitchhike on larger animals as a way of moving about from one food source to another. This process, which is called phoresis, may be relatively benign (using a butterfly to take you from one plant to another), or it may be more sinister (hitching a ride on the butterfly so you can then parasitise her eggs when she lays them). This is particularly common in mites, apparently, and especially in those species that live in temporary, unstable microniches or ‘merocenoses’ (such as decaying wood, dung patches or animal nests). The niche won’t last forever, so those animals that exploit such a niche need to find a way to get to the next patch. It’s too far to walk, so it’s easiest to hitch a ride.

The stalky thing is technically known as a pedicel and is effectively made of a kind of glue, which the mite secretes from near its anus; the glue sticks to the host, and the mite then walks forward, gradually lengthening the gluey link. When host and hitchhiker arrives at their destination (the next merocenose), the mite simply walks off, breaking the pedicel. This has recently been described by Jason Dunlop in Baltic amber that is about 45 million years old, so this is a very old and apparently successful adaptation for the mite (the article has been submitted to Naturwissenschaften).

Daria Bajerlein and co-workers  from Adam Mickiewicz University in Poznan, Poland (which seems to be a centre of studies  of the anatomy and ecology of these mites) have recently published a nice comparative study of the pedicel in four different species, and found that the pedicel differs in shape and size. Sometimes it’s a stalk, sometimes it’s a spiral. Bigger mites produce bigger pedicels (presumably because they are heavier). Barjerlein et al (2013) write:

The pedicel is a temporary structure that connects the phoretic deutonymph with its carrier. One terminus of the pedicel is attached to the deutonymph and the other to the body surface of the carrier. The pedicel is comprised of a substance produced by a gland that occurs in the rear part of the deutonymph body, close to the postcolon–anal atrium border (Bajerlein and Witaliński, 2012). Material for the pedicel is secreted outside of the anus as a fluid, but it hardens in contact with air.

Here’s some cool pictures from their paper showing the mite Uroobovella nova under a light microscope (A – the asterisk shows the cuticle of the hapless beetle host) and under a scanning electron microscope (one of the most amazing inventions in the history of science). (B) shows a mite with the squiggly pedicel and the attachment to the carrier’s cuticle. (C) shows some old pedicels, still attached to the cuticle of the carrier, and (D) shows a close-up of the connection to the carrier, in which you can see that the patterns in the cuticle have been repeated in the glue-like material of the pedicel.

Full-size image (159 K)

Barjerlein et al speculate that the pedicel may have evolved as part of competition with other, more rapidly moving mites that hitch a ride on smoother parts of the beetle’s body:

Macrochelids and parasitids, which are relatively large and move very quickly in contrast to uropodines, attach themselves to setae using chelicerae or claws. After finding a carrier they climb onto it quickly and occupy preferred body parts of the carrier which become unavailable for slow-moving Uropodina. Possibly, competition for attachment site combined with the unpredictable roughness of the surface of the carrier were the main factors determining the evolution of the pedicel. Deutonymphs of uropodines were forced to infest setae-uncoated body parts of the carriers that were not yet occupied by other mites. For example, as elytra of most aphodiid, histerid and hydrophilid beetles are not covered by setae or other protrusions, formation of the pedicel has become an evolutionary necessity enabling phoretic dispersal. Pedicel production is probably costly, but permits deutonymphs to use other animals for transportation which may be vital for slowly moving mites living in unstable and patchily distributed microhabitats.

This hypothesis may also help explain another feature of Uropodina phoresy: phoretic deutonymphs preferably use beetles for dispersal and are not found on flies that also breed in habitats such as dung or carrion. Flies move faster in comparison to beetles making them difficult for uropodines to infest and are moreover heavily covered with bristles, impeding attachment of the pedicel.

Finally, Daniel notes in his blog that many mites show highly specific host preferences (perhaps a consequence of their host inhabiting a very particular merocenose). Another paper by Bloszyk et al (2006) – from the same univerisity in Poznan – reports:

 A survey of soil fauna in Poland revealed 30 cases of centipedes carrying mites of the sub-order Uropodina. The 155 phoretic deutonymphs collected belonged to two species of Uropodina – Oodinychus ovalis (C.L. Koch, 1839) and Uroobovellapulchella (Berlese, 1904). These mites displayed a high degree of selectivity in their choice of carrier. The only species of centipede transporting mites was Lithobius forficatus (Linnaeus, 1758), despite the presence of 30 other species in the same habitats. It is possible that the large size and relatively fast speed of movement of this centipede make it a very good mite carrier. The majority of the mites were located on the sides of the centipedes, on segments near the anterior end. The high selectivity in the choice of carrier as well as the point of attachment suggests adaptation by the mites for phoresy by Lforficatus.

Here’s a picture from Bloszyk et al (2006) showing Oodinychus ovalis deutonymphs transported by the centipede Lithobius forficatus:

centipede

 

 

 

 

 

 

Bajerlein et al suggest that pedicels in different species have different internal structures and made be made out of slightly different stuff. It would be interesting to know whether there has been any divergence in the material used to make these structures over the 40 million years or so.

h/t @dllavaneras @CMBuddle

References:

Bajerlein D, Witaliński W, Adamski Z (2013) Morphological diversity of pedicels in phoretic deutonymphs of Uropodina mites (Acari: Mesostigmata). Arthropod Structure and Development 42:185-196

Bloszyk, J., Klimczak, J and Lseniewska , M. (2006) Phoretic relationships between Uropodina (Acari: Mesostigmata) and centipedes (Chilopoda) as an example of evolutionary adaptation of mites to temporary microhabitats. Eur. J. Entomol 103:699–707 (OPEN ACCESS)

Napierała, A. and  Błoszyk, J. (2013) Unstable microhabitats (merocenoses) as specific habitats of Uropodina mites (Acari: Mesostigmata). Experimental and Applied Acarology 60:163-180. (OPEN ACCESS)

Full moon rising over Wellington

July 22, 2013 • 4:49 am

You haven’t appreciated the Moon until you’ve seen this short but absolutely stunning video sent to me by reader Stan. It’s by Mark Gee on Vimeo, and is a single unmanipulated take. Gee gives the details below. And be sure to watch it on the biggest screen you can.

Full Moon Silhouettes is a real time video of the moon rising over the Mount Victoria Lookout in Wellington, New Zealand. People had gathered up there this night to get the best view possible of the moon rising. I captured the video from 2.1 km away on the other side of the city. It’s something that I’ve been wanting to photograph for a long time now, and a lot of planning and failed attempts had taken place. Finally, during moon rise on the 28th January 2013, everything fell into place and I got my footage.

The video is as it came off the memory card and there has been no manipulation whatsoever. Technically it was quite a challenge to get the final result. I shot it on a Canon ID MkIV in video mode with a Canon EF 500mm f/4L and a Canon 2x extender II, giving me the equivalent focal length of 1300mm.

Music – Tenderness by Dan Phillipson premiumbeat.com/royalty_free_music/songs/tenderness
markg.com.au
facebook.com/markgphoto


For photography/video buffs, Gee gives all the technical details at this site.

Stan added these remarks:

I honestly can’t say enough good things about this video – from the magnitude of the visuals, to the intimate stories playing out with the people, to the sheer humbling nature of seeing the awe-inspiring reality of this giant rock in the sky that we so often don’t stop to appreciate.

One thing I encourage you to do is watch this on the biggest screen you have.

The little ripples on the edge of the moon are due to density bubbles in the atmosphere, and we’re looking through a lot of it at this low elevation angle. You’ll notice that the silhouettes of the people are pretty sharp, since there is a lot less atmosphere from the camera to them than it is from the camera out to the moon.

If you’re a Kiwi, get yourself to the Mount Victoria Lookout; and if you’ve been there to watch this spectacle, weigh in below (and I’m jealous).