Behavioral Ecology Advance Access originally published online on July 21, 2004
Behavioral Ecology 2005 16(1):75-82; doi:10.1093/beheco/arh133
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Attention-altering signal interactions in the multimodal courtship display of the wolf spider Schizocosa uetzi
Department of Environmental Science, Policy and Management, Division of Insect Biology, 201 Wellman Hall, University of California, Berkeley, CA 94720, USA
Address correspondence to E. A. Hebets. E-mail: ehebets{at}nature.berkeley.edu.
Complex signals are common throughout the animal kingdom, consisting of one or more signals in one or more sensory modalities presented within a single display. I tested an efficacy-based backup hypothesis of complex signal function using the bimodal courtship signaling wolf spider Schizocosa uetzi. This hypothesis predicts that the visual and vibratory courtship displays function as backups to each other in the presence of environmental variability. I compared mating frequencies across four environmental treatments in which the visual and vibratory environments were manipulated independently in a 2 x 2 design with visual treatments of light/dark (i.e., visual signal present/absent) and vibratory treatments of filter paper substratum/granite substratum (i.e., vibratory signal present/absent). Results did not match the predictions of an efficacy-based backup hypothesis. The vibratory environment affected mating frequency, with more mating occurring in the vibration-present treatments compared to the vibration-absent treatments, but the visual environment had no effect on mating frequency. A second experiment was then conducted to test for an inter-signal interaction. Using the video-playback technique, I presented females with manipulated video sequences simultaneous with a controlled vibratory signal to test the hypothesis that the presence of a vibratory signal alters a female's response to the visual signal. In the presence of a vibratory courtship signal, females were more receptive to more visually ornamented males. This increased receptivity to increased visual ornamentation was not seen in a previous study conducted on S. uetzi in the absence of a vibratory signal, suggesting a potential inter-signal interaction. In a third experiment, I tested whether a female's visual attention was altered by the vibratory signal by examining female response to a visual "predator" while exposed to all possible combinations of male courtship signals. Females were more likely to get caught, and thus less likely to notice a predatory visual stimulus when exposed to a courtship vibration, supporting the hypothesis that the vibratory signal alters a female's visual attention.
Key words: attention-altering, complex signals, inter-signal interaction, limited attention, multimodal signals, spiders, video playback.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  E. A. Hebets Seismic signal dominance in the multimodal courtship display of the wolf spider Schizocosa stridulans Stratton 1991 Behav. Ecol., July 24, 2008; (2008) arn080v1. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 N. D. VanderSal and E. A. Hebets Cross-modal effects on learning: a seismic stimulus improves color discrimination learning in a jumping spider J. Exp. Biol., October 15, 2007; 210(20): 3689 - 3695. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. A. Moretz, E. P. Martins, and B. D. Robison Behavioral syndromes and the evolution of correlated behavior in zebrafish Behav. Ecol., May 1, 2007; 18(3): 556 - 562. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. O. Elias, E. A. Hebets, and R. R. Hoy Female preference for complex/novel signals in a spider Behav. Ecol., September 1, 2006; 17(5): 765 - 771. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Dadda and A. Bisazza Lateralized female topminnows can forage and attend to a harassing male simultaneously Behav. Ecol., May 1, 2006; 17(3): 358 - 363. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. O. Elias, N. Lee, E. A. Hebets, and A. C. Mason Seismic signal production in a wolf spider: parallel versus serial multi-component signals J. Exp. Biol., March 15, 2006; 209(6): 1074 - 1084. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. A. Hebets and W. P. Maddison Xenophilic mating preferences among populations of the jumping spider Habronattus pugillis Griswold Behav. Ecol., November 1, 2005; 16(6): 981 - 988. [Abstract] [Full Text] [PDF]
|
|