Tuesday, 28 October 2003

This presentation is part of : Display Presentations, Section Cb. Apiculture and Social Insects

Desiccation resistance in a widespread invasive insect

Pablo E. Schilman1, John R. Lighton2, and David A. Holway1. (1) University of California at San Diego, Ecology, Behavior and Evolution, 9500 Gilman Drive, San Diego, CA, (2) University of Nevada at Las Vegas, Biological Sciences, 8445 Westwind Rd, Las Vegas, NV

It has been shown that rate of invasion and local abundance of the worldwide, abundant, and ecologically damaging ant species, Linepithema humile (Argentine ant) is strongly affected by soil moisture. We used a novel non-invasive technique modulating the spiracular conductance by gas composition, which allowed us to measure and discern between respiratory and cuticular water loss. The results show the Argentine ant as a highly prone species to desiccation compared to other ant species.

Species 1: Hymenoptera Formicidae Linepithema humile (Argentine ant)
Species 2: Hymenoptera Formicidae Forelius mccooki
Species 3: Hymenoptera Formicidae Dorymyrmex insanus
Keywords: water loss, novel technique

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