Monday, December 11, 2006 - 10:35 AM
0326

Odorous house ant, Tapinoma sessile (Say), colony movement and budding in response to disturbance and food location

T. Aurora Toennisson, tcanaday@utk.edu and Karen M. Vail, kvail@utk.edu. University of Tennessee, Entomology and Plant Pathology, 205 Plant Science Building, 2431 Joe Johnson Dr, Knoxville, TN

Odorous house ants, Tapinoma sessile (Say), are common structure-invading ants in Tennessee and other parts of the United States. T. sessile colonies are usually polygynous and dwell in shallow nest sites such as in leaf litter and under stepping stones. Their colonies have been observed to move often and colonize new areas via budding. Such movement may help the ants to quickly dominate areas with high levels of anthropogenic disturbance and aid the ants in sequestering novel food resources available in and around human structures. To determine if disturbance would induce budding, high disturbance levels were simulated in the lab and colony movement and budding measured. Preliminary analysis of results indicates that disturbed ants often return to previously occupied nest sites. Additionally, we tested whether colonies would move or bud closer to food sources when offered nest sites with or without food at one-meter or six-meter distances. Partial colony movement to near-food nest sites was observed for all colonies tested, and no colony movement was observed to nest sites with no food offered.


Species 1: Hymenoptera Formicidae Tapinoma sessile (odorous house ant)

[ Recorded presentation ] Recorded presentation