After a somewhat tortuous path, Dave's paper demonstrating signal modulation in response to predation pressure just came out in the Proceedings of the National Academy of Sciences. This study nicely illustrates the advantages of using a replicated design to conduct behavioral experiments under natural conditions. Such experiments are often characterized by unpredictability that can test the perseverance of any field biologist. In the case of this study, we had to endure tropical storms, the scorching sun, poisonwood, millions of sand-flies, and hundreds of horse-flies, in order to be prepared for the precise moment when a male Anolis sagrei would display. All of these nuisances were only exacerbated by a daily routine that included dealing with low tides that required walking in and out of islands carrying at least 20 pounds of video equipment. Kudos to Dave for collecting such a nice dataset.
|Dave feels fully hydrated after drinking two litters|
of his favorite "water"
|Dave walking to island (# 1) and wondering |
where is all the water
|Maximum amplitude of head-bob displays given by males Anolis sagrei in the control and experimental islands|
|Differences in the active space of the signal between control and experimental islands. The inner circle corresponds to the active space in the presence of curly-tailed|
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