Tag: color change

Seeking Support for New Research Investigating Color Change in Green Anoles

Victoria Pagano’s page from the crowd-funding platform Experiment

Green anoles (Anolis carolinensis) are talked about quite frequently here on Anole Annals, with 11 articles being published in 2018 and 2019 combined! As I am sure many of you are aware, green anoles change color from green to brown, and while it is known how, it is not yet known why. Although there have been multiple field studies into what causes green anoles to change color, the data have been inconclusive. This is why an experimental study is necessary to try to determine the cause of the color change.

In this experimental study, there will be two main hypotheses tested:

The first is the well known thermoregulation hypothesis. I will be testing this by establishing separate light and heat sources, and turning them on and off for different scenarios. If anoles change color for thermoregulation, then they would turn brown more frequently when the heat is off and the light is on.

The second hypothesis is the effect of increased stress. Stress will be induced by sliding a red disk towards the anoles multiple times at a high speed. Any color change that occurs within the red disk moving and the following 10 minutes will be documented as stress-induced.

I will not be able to test the advertisement signaling hypothesis due to feasibility. Because funding and space is limited, I do not have the capacity to house male anoles, as each one needs his own setup. Therefore, testing only females is the only feasible option, and by doing so, the advertisement signaling hypothesis will not be able to be tested, as this hypothesis pertains mainly to males.

To raise funding for this project, I am using an all or nothing crowdfunding platform called Experiment. As fellow anole lovers, I hope that you can help support my scientific endeavors by visiting my project page. All forms of support are greatly appreciated, from donations, to telling your friends about the project, or even by just reading my project page and commenting your thoughts! Whatever the contribution, I am very grateful, and am simply excited to be able to share what I am doing with all of you!

If you wish to learn more about this project, you can visit the project page, “What drives the color change in green anoles?”, where I have posted my methodology, protocols, and will be posting continuous updates on the progression of the project. If you become a contributor, you will have exclusive access to more updates, and will be able to learn more about the research.

My project page stops accepting donations on November 1st at 12:00 AM PT, so be sure to make your way over to the page by then to give your support!

Thank you for taking the time to read this article. I hope that you will explore the project page, and help support this cool and unique research!

Male-Male Interactions in Anolis maynardi

The winner

Bright green male who won the fightAn instantaneous color change for the loser.

Two adult male A. maynardi were sitting on a flat tile deck about 6 inches apart with dewlaps exposed and head crests up. There was much head bobbing and they showed their bright yellow dewlaps by turning their heads sideways. Then fast wrestling occurred – It looked like they were using their mouths to bite each other — with the participants separating briefly before repeating the wrestling, during which they turned each other over and over. We (humans) may have precipitated the end of this bout by opening a door to get a camera, but one male ran off the deck down the vertical wall and the other stayed to watch. At this point a small female ran between the two towards the male nearest the deck. After 10 minutes the male that moved off first is sitting on a hand rail and has changed to his dark color, while the other male remains on a step still bright green.

Also: a brief note on nocturnal feeding. We had our first decent rain of the season on the 24th April and on coming home at about 8.30 pm, a large cosmopolitan gecko and a male A. maynardi were sharing the same wall and feeding on insects attracted to the outdoor lights.

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