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First published online October 21, 2004
Journal of Experimental Biology 207, 4105-4110 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.01261

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The effect of substrate on the efficacy of seismic courtship signal transmission in the jumping spider Habronattus dossenus (Araneae: Salticidae)

Damian O. Elias^1,*, Andrew C. Mason² and Ronald R. Hoy¹

¹ Department of Neurobiology and Behavior, Cornell University, Seeley G. Mudd Hall, Ithaca, NY 14853 USA
² Integrative Behaviour and Neuroscience, Department of Life Sciences, University of Toronto at Scarborough, 1265 Military Trail, Toronto, ONT M16 1A4, Canada

View larger version (20K): [in a new window]   Fig. 1. Seismic transfer functions of natural substrates measured at 5 mm from source: rocks (A); desert sand (B); leaf litter (C). Mean (thick lines) and individual (thin lines) transfer functions are plotted. Boxes show the bandwidth of buzz (black), and thump and scrape (white) seismic signals produced by courting males. Red trace (A) shows transfer function of the rock used in behavioural trials. Inset (B) shows transfer function of desert sand at a different scale to show its band pass property. All dB are gain relative to the input signal.

View larger version (15K): [in a new window]   Fig. 2. Attenuation on natural substrates. Mean transfer functions at different distances for rocks (A), desert sand (B) and leaf litter (C). Overall attenuation at different frequencies (D).

View larger version (12K): [in a new window]   Fig. 3. Female H. dossenus courtship responses on natural substrates. Male copulation success was used as a measure of female choice on rocks, desert sand and leaf litter.

View larger version (16K): [in a new window]   Fig. 4. Male H. dossenus courtship on natural substrates. Time spent courting females was used as a measure of male behaviour on rocks, desert sand and leaf litter. Visual only (phase 1) and multimodal (visual + seismic; phase 2) courtship was observed.