Caffeine effects on the predatory behavior of the orb-weaving spider, Argiope argentata

Caffeine effects on the predatory behavior of the orb-weaving spider, Argiope argentata

Alvin Sherman Library 4009

Argiope argentata are orb-weaving spiders--meaning that their webs are a sticky spiral wound around radii extending from a central hub. A. argentata have poor vision and depend on vibrations in their web for detection of prey. A. argentata are large spiders; the female is 25mm and the male is 10 mm. They build webs that are approximately 80cm across. Research thus far on spiders and drugs have focused on web-building behavior after depressants or hallucinatory substances have been administered. Research on stimulants and predatory behavior has not been addressed. The proposed research is an exploratory study investigating the effects of stimulants on predatory behavior in A.argentata. This study will be a between-subjects experiment with two groups. A control group will be used for baseline measures of predatory behavior. An experimental group will be administered caffeine prior to the measurements of predatory behavior. A prey item is simulated by use of a 100 Hz tuning fork. The fork is struck and the tine is placed in the web to create a vibration. Responses are scored from no response to full response. A full response score is given if the spider approaches the fork as they would a prey item. It is unknown what effect the caffeine will have on predatory behavior.