November 2 2010

7:30 pm NRB Auditorium

This seminar is sponsored by Department of Ecology and Evolutionary Biology

Peter Narins
UCLA, Depts of Integrative Biology and Physiology and Ecology and Evolutionary Biology

Building on Darwin's Legacy: Environmental influences on the evolution of communication systems


Many species of animals, including man, face the formidable task of communicating in naturally noisy environments. From his travels in South America, Darwin was acutely aware of the musical quality of frog vocalizations, as well as their importance in communication in naturally noisy environments. In this talk, I shall review the evidence for the remarkable ability of amphibians to shift their call timing in response to both high-level interfering tones or to small intensity shifts in the background noise. We have explored communication behavior in a wide variety of taxa that appears to have evolved specifically to tailor and sculpt intraspecific communication systems. Finally, I shall present behavioral evidence that broadband environmental noise may act as a strong selective force in sculpting the acoustic communication systems of two species of two Old World arboreal frogs. The dramatic frequency shift into the ultrasonic range of the harmonic content of the advertisement calls likely represents an adaptation that prevents signals from being completely masked by the intense broadband background noise from local streams. Supported by NIH Grant no. DC-00222.

Neuroscience Research Building (NRB) Auditorium
Time: 7:30 pm

Reservations are NOT required, seating is on a first come, first served basis.

Pay parking is available in Lot 9

For more info: (310) 825-4373











































































































































































































































































































































































































































































































































































































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