Eur. J. Entomol. 104 (1): 145-148, 2007 | DOI: 10.14411/eje.2007.020

The courtship song of Drosophila santomea and a comparison to its sister species D. yakuba (Diptera: Drosophilidae)

Eric T. WATSON1, Emma RODEWALD2, Jerry A. COYNE2
1 Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
2 Department of Ecology and Evolution, The University of Chicago, 1101 E. 57 Street, Chicago, IL 60637, USA; e-mail: j-coyne@uchicago.edu

We describe the male courtship song of the newly-discovered species Drosophila santomea, endemic to the island of Saõ Tomé and the sister species of the widely distributed D. yakuba, which also inhabits the island. The song of D. santomea resembles that of D. yakuba in lacking a "sine" song, but the interpulse interval (IPI) in the "pulse" song is about 67 ms for the former species and 110 ms for the latter. This is the largest difference in IPI observed between any two sister species in the D. melanogaster subgroup, and may play a role in the strong sexual isolation between these two species.

Keywords: Drosophilidae, behavior, courtship song, interpulse interval, Drosophila, sexual isolation

Received: August 8, 2006; Revised: August 30, 2006; Accepted: August 30, 2006; Published: January 3, 2007  Show citation

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WATSON, E.T., RODEWALD, E., & COYNE, J.A. (2007). The courtship song of Drosophila santomea and a comparison to its sister species D. yakuba (Diptera: Drosophilidae). EJE, 104(1), 145-148. doi: 10.14411/eje.2007.020
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