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KMID : 0613820110210071009
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Journal of Life Science
2011 Volume.21 No. 7 p.1009 ~ p.1015
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Web-Building Strategy of a Wasp Spider, Argiope bruennichi, under Sensory Information Emitted by a Prey Species
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Jin Woo-Young
Shin Hyun-Chul
Kim Kil-Won
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Abstract
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Web structure of spiders is a foraging strategy as well as an investment to get prey. In order to increase the fitness consequence, spiders change their foraging strategy based on sensory information provided by prey species. We conducted an experiment to demonstrate whether an orb-web building spider, Argiope bruennichi modifies its web-building behavior after experiencing sensory information emitted by a UV recognizing flying insect, Bombus terrestris. To know how the web structure would be modified, we observed web characteristics after providing sensory information of a potential prey species, the bumblebee (experimental group) and compared them to the control group (no information provided). We hypothesized that the spiders of the experimental group would increase investments in their web construction and stabilimentum decoration. The results rejected our hypothesis. Web and stabilimentum constructions decreased in the course of the experiment in both the control group and the experimental group. The individuals did not increase their stabilimentum length and did not extend their web areas, in spite of sensory information given by the nectar collector.
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KEYWORD
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Web-building behavior, prey, sensory information, Argiope, bumblebee
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