In addition to a number of Anole posters yesterday, the Joint Meeting of Icthyologists and Herpetologists featured a talk by Rich Glor entitled “Phylogenetics and Diversification of Anolis Lizards.” In his 12 minutes Rich covered a lot of material. He described: the key components in diagnosing an adaptive radiation (speciation, adaptation and the more controversial extraordinary diversification), how the properties of adaptive radiations result in problems resolving their phylogenies (particularly when diversification rates are extraordinary), leveraging the anole genome project to generate and analyze new, informative loci for anole phylogenetics, the impact of incomplete data matrices on the ability to accurately infer phylogenies, and closed with a presentation of the latest, greatest genus-wide phylogeny of Anoles.
Author: Anthony J Geneva
I am an Assistant Professor at Rutgers University-Camden. I use a variety of evolutionary genetic approaches to ask questions about gene flow, adaptation and speciation.
Although it was filmed a few years ago, I just recently got around to watching the BBC documentary series Life in Cold Blood written and narrated by Sir David Attenborough. In the third episode of the series “Dragons of the Dry” there is a brief segment on anole display behavior. Attenborough aggravates a male A. sagrei with a mirror and is rewarded with “the full works”: erect dorsal and nuchal crests, tail wags, push-ups and dewlaping.
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.