I had a bit of free time to take photos along the Recodo Road this afternoon and managed to get a few nice shots of Anolis marcanoi and its spectacular dewlap. Anolis marcanoi was among the first anoles to be described with the aid of genetic data, with early electrophoretic work being used to confirm that it was genetically distinct from sympatrically distributed populations of A. cybotes that have white or pale yellow dewlaps (Webster 1975, Williams 1975 [they’re a bit of a pain to access, but both articles are available via the Biodiversity Heritage Library]). Although they were initially regarded as ‘sibling species,’ subsequent phylogenetic work suggests that A. marcanoi is in fact the outgroup to all remaining species of cybotoid anoles (A. cybotes, A. longitibialis, A. strahmi, A. breslini, A. whitemani, A. shrevei, and A. armouri). Interactions between A. marcanoi and A. cybotes were also the subject of Losos’s (1985) famous ‘lipstick’ study in which “True Red” lipstick was used to experimentally render the dewlaps of A. cybotes a similar hue to those of A. cybotes (A. marcanoi males, in turn, had their dewlaps painted white with “Superior Clown White Make Up” to make them look like A. cybotes). This study remains one of the only investigations to date to address the role of the dewlap in species-recognition. We have our last day of work in the field tomorrow before heading back to snowy Rochester!
Category: Notes from the Field Page 21 of 22
If you love anoles and have visited the Dominican Republic, chances are that you’ve spent some time on the Recodo Road. Initially made famous by Ernest Williams and his students, this road running north of Bani into the foothills of the Cordillera Central remains one of the most interesting anole hunting localities in the DR. My lab is particularly interested in the interactions between three types of trunk anoles in this region: Anolis brevirostris, A. distichus ignigularis, and A. distichus ravitergum (we’ve recently suggested that the latter two may deserve elevation to full species status and Luke covered this topic in a previous blog post). We’re currently using molecular genetic and ecological methods to investigate the possibility of ecological speciation among these forms.
I thought it would be fun to share some recent developments along this classic anole hunting locality. One feature of the Recodo Road that is both a blessing and a curse is the need to cross the Rio Baní. Because there are no bridges, crossing the river requires driving through the river itself. This generally isn’t a problem with a good 4×4, but getting stuck in the middle of the river is somewhat of a right of passage (the route can also be completely impassable after heavy rains). Shabby bridges made of sticks are often constructed for pedestrians and motorcycles, but these tend to be somewhat shaky and wash out each time the river floods. This winter, we found that some local entrepreneurs have constructed a somewhat more substantial stick bridge and have been charging a modest toll to motorcyclists interested in using it. The photo on the left of the image above depicts the toll collector and his modest gate. We were told that motorcycles were asked to donate what they could, rather than being charged a fixed rate. The photo on the right of the above image shows where we cross in our 4×4.
I’ve posted twice previously with images of the Hispaniolan trunk anole (Anolis distichus) feeding on tiny insects, crickets, and beetles (1, 2). I took another such shot yesterday along the Recodo Road in the Dominican Republic, this time of A. distichus eating a bee. He spent the later part of this feeding episode scraping the wings off against the bark of the trunk.
Last summer the Glor lab began collecting light data to supplement ongoing research into the speciation of distichoid Anolis lizards. Following methods developed by Leo Fleishman and Manuel Leal, our aim was to measure light levels at the exact location where a lizard had displayed. Doing so involves holding a small sensor to the spot of the display and measuring the average light intensity for 15 seconds. That’s easy enough when the animal was 7 or 8 feet high, but most of our observations were substantially out of arms reach.
Necessity being the mother of invention (Plato, 360 B.C.), we rigged together our very own collapsible light meter pole using a broken panfish rod, utility cord and athletic tape. This rig, pictured at right, has served us well, including our current trip to the Dominican Republic (for updates on the the trip see the Glor Lab Page). It is our hope that by accurately measuring light at the site of displays we get a better handle on where males choose to display in their environment and how those sites differ between populations.
In the mid-1980’s, Guyer and Savage proposed dividing Anolis into five genera. This proposal has mostly been rejected by the anole community, for reasons detailed in Poe (2004), Lizards in an Evolutionary Tree and the Wikipedia Norops page. The main reason is that although Guyer and Savage’s proposed genus Norops is monophyletic, all of the other proposed genera are not. Moreover, given the uncertainty that still exists about relationships at the base of the anole tree, sundering anoles into well-supported monophyletic subclades is still not possible. Finally, in Guyer and Savage’s initial paper, Anolis sensu lato was found to be monophyletic—so why bother? Even though we now know that Chamaeleolis, Chamaelinorops, and Phenacosaurus arose from within Anolis, it is much simpler to sink these genera into Anolis rather than to try to break anoles into umpteen different genera—many poorly supported.
Despite these points, and the general support for retention of an unsullied Anolis, support for Norops has one last redoubt, in Central America, and with particular strength in Costa Rica. There, the use of Norops is nearly ubiquitous, as evident in the Reptiles of Costa Rica flashcard pictured above (and for sale throughout the country).
I’ve completed the brief survey of the distribution of A. cristatellus in Costa Rica (see previous post for explanation). The work was hampered by rainy and cool weather. Nonetheless, several new localities were identified. In particular, we found cristatellus in Bribri, very close to the Panamanian border. We actually went to the border town of Sixaolo, and even walked across the bridge, setting foot in Panama for a full 90 seconds (border officials apparently routinely allow tourists across the border to take a photo). However, by that time, the weather was very overcast and cool, and no lizards were out. Were I a betting man, I’d wager that cristatellus is already in the land of the canal.
I’ve just arrived in Limon, a port town on the Caribbean coast of Costa Rica, to track the spread of the introduced species A. cristatellus. Several realizations occurred to me as we wended our way down the mostly beautiful road from San Jose. First, I realized that not only have I seen cristatellus in its native range of Puerto Rico and the Virgin Islands, but I’ve also seen introduced populations in Miami and the Dominican Republic, as well as here. This species gets around!
In the good old days, back when grad students weren’t afraid to push the boundaries and TSA didn’t exist, we used to transport lizards in the passenger cabin of airplanes. We’d simply put them, one to a plastic bag, in a backpack or duffle bag and bring them onboard as carry-on luggage. Rarely was this a problem.
Lizard guys weren’t the only ones to do this. I remember a frog biologist telling me of the time he brought a bunch of coquis back to his lab from Puerto Rico. They were snuggled into their individual little containers, dark and moist, and apparently quite content, because midflight they started calling as only a coqui can. Of course, this attracted the attention of other passengers. As they looked around, up and down and sideways, speculating about what was causing the ruckus, my colleague simply buried his nose in his book and kept quiet.
I only twice had trouble carrying anoles onboard. The first time was in Gainesville, Florida, in 1987. I was just starting out on my anole research and had flown to Miami to collect a sample of the superbly diverse, if non-native, anole fauna of that fine city. I collected five species, including A. carolinensis (the only native species of the lot), A. sagrei, A. distichus, A. cristatellus, and several magnificent knight anoles, A. equestris, the largest anole species. I then flew to Gainesville to meet with anole expert Alan Pounds, anoles in tow. No problem. However, on the way back, things did not go smoothly. The Gainesville Airport, at that time, was a small, rinky-dink affair. When I got to security, I put my duffle bag full of lizards onto the conveyor belt and through the x-ray machine it went (as an aside, as far as I could tell, no lizard suffered any harm from being x-rayed). The inspector, a small, round, white-haired and cranky woman, took one look at her monitor and barked, “You’ve got an alligator in there.” I pulled out a small A. carolinensis and tried to convince her otherwise, but to no avail. It was the only time I had to check my bag o’ anoles.
The second problem trip was a year later in Jamaica. In our travels, we would put the lizards in gallon-sized plastic bags, inflated with air (this was pre-Ziploc days—such bags are hard to find now). Every two days, we would change the bags, and this worked fine. Except on this particular trip, I failed to bring enough Baggies® with me, so we had to scour local shops for Jamaican made bags, which we eventually found. However, unbeknownst to us, these bags were not well made. On the day we were to fly out of Montego Bay en route back to California, we checked in and passed through security without incident. I thought the coast was clear. But then, as they called the flight, I realized that the security staff—all female, all dressed in elaborate red uniforms, including ornate hats—were hand-searching each piece of carry-on luggage. My heart sank. When I got to the front of the line, the woman unzipped my duffel bag, reached in, and started rummaging around with her hands, but without looking down. Saved! Or so I thought. Unfortunately, several plastic bags had split open at the seams, freeing their captives, and a beautiful male Anolis grahami jumped out of the duffel and onto the table. This the inspector did see. She immediately let out a scream and—I kid not—stood on a chair. I thought all was lost, but from her lofty perch, she yelled at me to catch the lizard and get on the plane, which I quickly did, returning to the lab without further trouble.
So, in talking to fellow from Transport Executive’s man and a van Plymouth , reminisced on how we used to do it in the old days. No packaging lizards in coolers for transport in air cargo or checked luggage, no elaborate containers, no fuss, no muss. It was a simpler, easier time, and usually it worked quite well. I always suggest to travelers these days that they consider taking a duffel bag and try hand carrying their lizards, but then again, we can only guess how TSA would react (and the x-rays are probably now a lot stronger).
Note added June 2, 2013: Since this post was published in December 2010, a number of commenters have asked about the consequences of transporting lizards on airplanes. There are two issues for doing so. First, capturing a lizard and taking it somewhere else almost always requires a collecting and/or export permit from the state or country of origin. Failing to do so is breaking the law. Moreover, the United States’ Lacey Act makes it a felony to import into the United States any animal illegally (i.e., without permission) collected in or exported from another country. Let me reiterate: this is a felony. If you get caught doing this, you are in big trouble. If you are transporting animals legally into t
Second, can one bring lizards onto airplanes. As far as I am aware–though I may be wrong, so you should check yourself–there are no laws against doing so. However, airlines have regulations about what you can bring onto their airplanes and how you can do so, so you’ll need to check with the airline. In addition, there is the question about how to get the animals through security if you are transporting them with you. As always, the internet is a good place to start in trying to figure out what is allowed and how to proceed. Here’s one article I found in a quick Google.
In addition to performing dewlap extensions, head bobs, and pushups, many anoles raise a dorsal crest during territorial disputes. Here, two Anolis sagrei males square off. The static dorsal crest serves to modify the appearance of active pushups and dewlap extensions, perhaps making the male appear larger and more imposing. It is unclear how the crest is controlled. Jenssen notes the lag period before the crest is raised and the persistence of the crest after a territorial bout is concluded; thus, the crest may be a response to adrenaline and under the control of the sympathetic nervous system. Note the tongue extension by the top lizard.
I took the photo above while out on nocturnal hunt for twig anoles in the Sierra de Bahoruco (a mountain range in the southwest Dominican Republic). Searching for twig anoles generally involves lots of hours spent scanning vines and twigs for narrow lizard profiles. Can you find the twig anole in this image (click on the image for a larger version)?