Author: Jonathan Losos Page 97 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.

Lizard Races At The National Corn Festival

 “You haven’t lived ’til you’ve seen little girls in tiaras & sashes racing their anole lizards & screeeaming.” A tweet like that demands attention, so Anole Annals looked into it. Turns out that as part of the Louisiana Corn Festival, held every year in Bunkie, Louisiana, there is a lizard race featuring anoles. Anole Annals learned of this yearly event in early June and sure enough, a quick look at thetowntalk.com confirmed that the event was on again this year: “Be sure to be on hand for the lizard races at 2:30 (bring your own lizard); and stick around for live music and street dancing.”

So, Anole Annals settled back and waited for the news reports and Youtube postings. The appointed day came and went. And…nothing. No googleable photos. No newspaper accounts. Not a single video. Surely there must be a record of this wonderful event somewhere. We’ll keep looking.

Backpacking Lizards For Science: Radio-Tracking Puerto Rican Anoles

Brad Lister and Andres Garcia report from Guanica, Puerto Rico:

Most likely, every researcher working in the field with anoles has had the same questions that we’ve wondered about for many years.  How much time do resident species spend in the canopy where they are hidden from our view? What is the home range of males and females? On average, how far do individuals move per day? On days when most of the lizards in a given habitat seem to disappear, where do they go? We tried to answer these and related questions by conducting hundreds of hours of observation on Anolis nebulosus in the Chamela dry forest in Jalisco, Mexico. Anolis nebulosus is very rare in this area and we spent more time finding lizards (2-3 hrs/individual) than actually making observations. Often, after hours of searching, the focal individual would disappear from view within minutes.

Obviously the ability to easily find and track small anoles using radio telemetry would be a major asset in our efforts to understand their behavior and ecology.  Previously, transmitter size limited radio tracking to relatively larger lizards such as Sceloporus, Phrynosoma, and Ameiva. Recently, however, Advanced Telemetry Systems has developed 0.2 and 0.5 gram transmitters that make tracking even 3-4 gram female anoles feasible. We are currently in Puerto Rico continuing with our research on climate change and Anolis ecology, and decided to use the ATS transmitters to track A. gundlachi, A. cooki, and A. cristatellus.

The photo to the left illustrates the ATS equipment we are using in the Luquiilo rainforest and the Guanica tropical dry forest.

Anoles Adopting Funny Postures

John Rahn regaled us with tales of the Big Kahuna, his big backyard sagrei (a must read, if you don’t recall it). Here’s some more. First, he’s seen BK stand like this for quite a while. I have also seen anoles do the same. I wonder what’s up. Maybe they’re into yoga? A new pose–Sideways Lizard?

And here’s another photo. John writes: “I’ve noticed that when they catch/eat something, they rub their faces(?), or their catch on the concrete, like he’s doing here. What’s that all about?” Indeed, what is that all about? I’ve seen it, too. Are they using the ground as their own personal napkin? But then why do it to prey items, too? Thoughts?

Editor’s note: check out this video, referred to in the comment below by reader Beachton

[vimeo https://vimeo.com/1986146]

Anole Talks At The Ecological Society of America Meeting This Week

What can a kitty cam tell us about the secret lives of anoles? Photo from http://blogs.inlandsocal.com/pets/4501cat.jpg

The 97th annual meeting of the Ecological Society of America begins Sunday in Portland. These meetings are truly enormous, and given the great amount of ecological research, past and present, on anoles, it’s surprising that there are not more anole talks scheduled. Nonetheless, there are three, and they look to be good ones. On Tuesday, Sean Giery will talk about studies on the ecosystem role of anoles in Miami. Basically, by examining stomach contents and measuring stable isotopes, he determined the extent to which terrestrial resources enter arboreal ecosystems. For A. equestris and A. distichus, the route is terrestrial insects walking up trees and being eaten, whereas for A. sagrei, it results from foraging on the ground. Also on Tuesday, Jason Kolbe talks on an experimental study of founder events in the Bahamas. We’ve already reported on this study, but Jason will be providing at least a few snippets of new data from this year’s field season. Finally, on Thursday, Kerrie Anne Lloyd will talk about a study looking at predation rates by domestic cats in Georgia, as determined by placing Kitty Cams on housecats. Turns out that a favorite prey item is, alas, green anoles.

Check out the abstracts for these talks below the fold, and if any AA readers attend the talks, please file a report.

Best Anole Documentary Ever

httpv://www.youtube.com/watch?v=2xXPcYUnKRM

At least according to some. AA emailed the production team asking for the back story, but we still await a response.

And while we’re on the topic of anole flicks, here’s a video of an emaciated but alert and active female green anole slowing changing color.

Movie Review: Anoles, Spiders, And Superheroes

Spoiler Alert: I’m about to discuss the central plot of Spiderman. I assume most readers are by now familiar with the movie’s central conceit, namely that a noble scientist valiantly strives to create a race of super-lizards with extraordinary powers to benefit all of humanity, but tragically is stymied by the movie’s villian, a pajama-clad arachnophile with psychological baggage that produces an unreasonable antipathy to all things reptilian.

I won’t go into the particulars, but suffice to say that until its tragic denouement, the work is a herpetological marvel, as well as an inspiration to what may be accomplished by the miracles of genomics. Particularly impressive was the scene in which the oversized saurian regenerates its tail–quite graphically and accurately–in real time. Admittedly, the CGI lizards (of which I can’t find any photos online) were not quite up to par, but not a bad effort. Moreover, the best character in the movie is the chief scientist, Curt Connors, who immediately upon entrance introduces himself as the world’s foremost authority on herpetology and, as if to prove it, has an office replete with herpetological items (ok, two that I noticed: a stuffed turtle and a sea turtle skull).

Dr. Curt Connors, the world’s foremost herpetologist.

But, you may be thinking, a movie featuring lizards is great in all, but what’s the connection to anoles? Admittedly, there was no lizard or superhero in the movie who could be identified as anoline (incidentally, Time magazine has a nice discussion of what actual lizards may have been the basis for these creatures). However, and you may consider this a stretch, there was one link to the anole world: Connors, the scientist, was a dead ringer* for Jonathan Roughgarden (vintage 20 years ago), a resemblance enhanced by Collins’ obvious theoretical brilliance. Now, of course, it was disappointing when Connors transformed himself into a Komodo-sized saurian that bore no resemblance to Anolis gingivinus or any other Lesser Antillean anole, or even any anole at all, but perhaps we can save that for the sequel (Spiderman II: The Anole Strikes Back), when Connor triumphantly re-emerges to vanquish the spider-people and save humanity.

*by “dead ringer” I mean “bore a slight resemblance, at least in my mind’s eye”

Scary? Try adding a dewlap and toepads!

Anolis Carolinensis Lab Model Of The Month


ResearchBlogging.orgThe good folks at Lab Animalput out by the Nature Publishing Group, have named the green anole Miss June, er, I mean Model Animal of the Month in their June issue. If you’re not familiar with this periodical, it’s a “peer-reviewed journal publishing timely and informative editorial material emphasizing proper management and care. Lab Animal reaches over 10,000 professionals in both the academic world and applied research industries.” Obviously, quite a perceptive bunch, and the article, “The Ever Adaptable Anole,” is quite accurate and informative.

Anon. (2012). The ever-adaptable anole Lab Animal, 41 (6), 149-149 DOI: 10.1038/laban0612-149

More On Anoles And Day Geckos In Hawaii

Photo by Tony Gamble.

We at Anole Annals are a little obsessed with what’s going on between anoles and those anole-wannabees, the day geckos, in Hawaii. Really, someone’s gotta’ study this. Here’s a photo kindly provided by Tony Gamble demonstrating beyond a shadow of a doubt that the two species coexist. Here’s Tony’s take on whether the species interact:

Photo by Tony Gamble

“I didn’t see too many interactions between geckos and anoles. I would see large male anoles walk around and display in places loaded with day geckos. The geckos would certainly get out of the way of the brutish anoles but I did not observe anoles actually chasing or attacking geckos. Both species seem to be far more concerned with intraspecific interactions (attached photo on left shows a male Anolis eyeing the female on the other side of the fence). In some places they co-occurred at incredibly high densities (see photo below the fold) and given the abundance of roaches and spiders food does not seem like its a limiting factor. In Kona, which is fairly dry, anoles tend to be found only in areas that are irrigated (e.g. gardens, hotels, strip malls). Day geckos are more abundant in those places but can be found almost everywhere – even away from developed areas. It is possible interspecific interactions are different on more mesic parts of the big island and on other islands where more area is open to anoles. This is certainly an experiment in progress – we just need to find some time to observe it.”

Leal, Fleishman Labs In The Field

Follow their exploits as they rampage through the eastern Caribbean, measuring dewlap spectra and general wreaking havoc. Most recently, they’ve been to St. Croix to examine the enigmatic Anolis acutus, a refugee of the cristatellus clade that somehow made its way from Puerto Rico and now flourishes as the only anole on this island. Most amazingly, the density of this species is outrageously high, with many males peacefully coexisting on a single tree, like a bunch of hippies. Why do they do this? If anyone can figure this out, Manuel Leal, Leo Fleishman and company are just the ones. Stay tuned to Chipojo Lab for further updates.

Are Green Anole Populations Declining Due To Drought?

From http://www.thedrillpress.com/tex/2008-11-01/tex-2008-11-01-splinter-bgreenwood-04.shtml

AA reader Jim Jackson writes:

“I would like to suggest a topic for a post on Anole Annals:  Has anyone besides me observed a collapse in “their” local A. carolinensis population?  I live near Tallahassee, Florida, and have always had a large population of Green Anoles on my property; during September, 2011, there were at least 30 individuals around my house and on shrubs and small trees in the yard.  Even in May, 2012, there were a dozen.  Yesterday around noon I found an emaciated hatchling under a cover object.  Very odd.  I searched the property for active anoles and found none.

There has been a moderate drought here since 2010, and the larger-bodied flying insects (bees/butterflies) on flowers seem less abundant than in 2009.  Reduced food resources could explain a population decline, but the drastic change on my one acre seems hard to attribute solely to starvation.  There are no sagrei on my property.”

Anyone got any thoughts?

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