Author: Jonathan Losos Page 126 of 133

Professor of Biology and Director of the Living Earth Collaborative at Washington University in Saint Louis. I've spent my entire professional career studying anoles and have discovered that the more I learn about anoles, the more I realize I don't know.

Cambridge’s Greenest Eatery

 

Outside the Cambridge Common on Mass. Ave. in Cambridge. Bonus points: name the famous evolutionary biologist (hint: he has an accent).

On Massachusetts Avenue, halfway between Harvard and Porter Squares in Cambridge, can be found  a restaurant, Cambridge Common, which serves a tasty burger and decent fries, and plenty of good beer. What makes this restaurant really stand out, however, is its downstairs auditorium for live music, the Lizard Lounge (described by the Boston Globe on the lounge’s website as “a bordello parlor-like space of red velvet, Persian rugs, and [a] fringe, and ethnically diverse and uniformly young and hip crowd”). And even more winsome, plastered across the front wall of the building, facing traffic (and doubtless the cause of many accidents resulting from the gawking of bewitched drivers), is a much larger than life, oddly colored photograph of Anolis carolinensis.

Questions abound. Why, for example, did the CC decide about a year ago to remove the charming painting of a day gecko and replace it with the colorized green anole photo? And whence the name “Lizard Lounge”? I’d send you to their website, but it’s uninformative on these important matters.

An Anole Earful

From http://www.dlisted.com/node/41572. Warning: most suggested captions not for family viewing.

Society for the Study of Evolution Announces Changes to the Name of its Journal

In a press release issued today, the Society for the Study of Evolution announced that effective immediately the name of its flagship journal will change to better reflect its contents and to position the journal at the cutting edge of evolutionary biology. Formerly known as Evolution: International Journal of Organic Evolution, the leading journal in the field will now be known as Evolution: International Journal of Anolis Lizard Evolution.

Spatial Variation in Anole Sex Ratio and Size

Anolis schwartzi from St. Eustatius. Photo courtesy Robert Powell.

As the last 40 years of research attests, anoles present a great study system to investigate questions in evolutionary ecology, especially at the macroevolutionary, cross-species level. Indeed, the rich literature on a large variety of topics including sexual dimorphism, ecomorphology, size evolution, biomechanics and many other topics—reviewed in Lizards in an Evolutionary Tree—has made anoles a veritable model system for evolutionary study.

One area that has received surprisingly little attention is behavioral ecology. Anole behavior is remarkably easy to study in the field, at least for many species. And interesting patterns of divergence in behavior (e.g., territory, mating systems, foraging mode) among closely related species, combined with convergence at a deeper phylogenetic level, make anoles an attractive group for such studies.

What Does “Anoline” Mean?

From the British Medical Journal, 1900

I was recently reading a paper in which the phrase “anoline lizards” was frequently used, and it got me thinking: Just what does “anoline” mean? Is it synonymous with “anole”? And is it correct usage? Needless to say, the word is not in standard dictionaries.

Part of the potential confusion comes from the way it was used in the past, at least by some. Back in the old days, pre-molecular data, the standard wisdom was that the genera Chamaeleolis, Chamaelinorops, and Phenacosaurus were early offshoots of the anole radiation that had evolved prior to Anolis. Hence, Ernest Williams used the term “anoline” to refer to them, as well as Anolis species. In this sense, “anoline” might be construed to apply more broadly than just to members of the genus Anolis (and, of course, should not be confused with “anoloid” which referred to an even broader phylogenetic grouping that included other, more distantly related lizards). In this sense, “anoline” had a technical meaning beyond just Anolis. But…some workers, even back then, referred to these three other genera as “anoles” as well. Moreover, we now are confident that the three genera arose within Anolis, which leads most modern workers to no longer recognize those genera, but rather subsume the species within Anolis (though it is still perfectly appropriate to recognize them as subclades of Anolis).

Statistics on the Commercial Trade of Anoles

Photo from http://www.petworldshop.com/

We’ve had a number of posts in recent months on the remarkable variety of anole species available in the pet trade (for example, here and here), particularly in the Europe. Another aspect of the pet trade, however, is the volume at which it occurs, and in this case, it is probably a few common species that make up the bulk of the trade. A recent paper in the Herpetological Journal explored reptile and amphibian commerce in Great Britain over a ten-year period from the mid-1990’s to mid-2000’s. The paper has some interesting points on various aspects of the dynamics of the trade, including how price has changed, the role of captive breeding, and other points. Anoles aren’t a central focus of this paper, but it does report that the price of anoles has increased over time, even after correcting for inflation: 26% in both A. carolinensis and A. sagrei, but only 4% in A. equestris.  This was about middle of the pack for lizard species surveyed. Some had become more expensive—more than 400% more in Parson’s chameleon—but about half the species had become cheaper, green iguanas dropping by 69% at the other extreme.

I summarized what I could learn about the anole trade in Lizards in an Evolutionary Tree. It isn’t much, but here’s what I had to say: From 1998–2002, more than 250,000 A. carolinensis and more than 100,000 A. sagrei were legally exported from the United States; in the same period, as many as 30,000 anoles of various species may have been imported into the U.S. Figures for imports into other countries are unavailable, but may be large because there are many reptile hobbyists in Europe. The United States is the only country likely to have much domestic trade in anoles, and these numbers, too, are great because many A. carolinensis and A. sagrei are captured and sold within the United States, not only for the pet trade, but also to laboratories, educational supply companies, and zoos. Data on the magnitude of this trade is scarce, but more than 250,000 anoles were collected in Florida in a four-year period in the early 1990s (this number may be a substantial underestimate because dealers were not required to report the number of the introduced A. sagrei and as a result, most did not do so.). in Louisiana, nearly a million A. carolinensis a year were collected in the mid-1990s, but that number has declined to around 350,000 per year in 2006, apparently as a result of declining demand, rather than shortage of anoles.

Newly Discovered Anole Hybrid

What’s All That Head-Bobbing About?

Anolis sagrei displaying. Photo by Valerie Simon.

Anoles are renowned for their displays in which they do pushups, bob their heads up and down, and unfurl their colorful dewlaps. Indeed, the internet is awash with videos of such behavior (here’s a good one of A. sagrei including some cool “slo-mo”; here’s a vicious fight with audience commentary; and for the pacifists out there, here’s a solitary brown anole displaying).

But what’s all the displaying about? And, more specifically, is there any significance to how much a particular male displays?

Anolis limifrons Down the Hatch

There’s a nice sequence of an eyelash viper swallowing an Anolis limifrons here (scroll down).

The Anole Genome Is Coming! The Anole Genome Is Coming!

More than six years in the making, costing untold millions, the fully sequenced genome of A. carolinensis is coming soon to a journal near you. After many promised delivery dates have come and gone, a blockbuster draft manuscript has finally arrived in the hands of its coauthors. Hopefully, things now will move expeditiously and the paper will be published before too much longer, at last bringing the genetic wonders of anoles to the world at large.

Page 126 of 133

Powered by WordPress & Theme by Anders Norén