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2011

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Interpopulation Variation In Kairomone Use By Cyrba Algerina, An Araneophagic Jumping Spider From Portugal, Ana M. Cerveira, Robert R. Jackson Jan 2011

Interpopulation Variation In Kairomone Use By Cyrba Algerina, An Araneophagic Jumping Spider From Portugal, Ana M. Cerveira, Robert R. Jackson

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Geographic variation in a predator's reliance on kairomones from prey was investigated. The predator studied, Cyrbaalgerina, is an araneophagic (spider-eating) jumping spider (Salticidae) and the prey were oecobiid spiders (Oecobiidae). There were two study sites (Sintra and Tavira), both in Portugal. Oecobiusmachadoi was a common oecobiid in Sintra, but no oecobiids were found in Tavira. Staged encounters showed that oecobiid-specific prey-capture behaviour was adopted by the C. algerina in Sintra but not in Tavira. In experiments using a Y-shaped olfactometer, significantly more Sintra C. algerina individuals chose the side with oecobiid odour instead of the blank side when the odour …