Abstract of Thesis Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Master of Science BUTTERFLY ABUNDANCES, LARVAL PREDATION, AND EGG PARASITISM AS DETERMINED BY PROXIMITY TO BUTTERFLY FARMS IN FLORIDA AND COSTA RICA By John Courtland Whelan August 2008 Chair: Thomas C. Emmel Cochair: Jaret C. Daniels Maj or: Entomology and Nematology Butterfly farming is an emerging and rapidly growing industry, both in developed and developing nations around the world. As an industry focused on breeding butterflies for sale, while providing a number of incentives to local communities such as jobs, revenue, education, and conservation, these farms are becoming popular enterprises and ecotourism destinations. However, little is known about the impacts of these farms from a biological and ecological viewpoint. This study aimed to collect data on 1) wild butterfly abundance, as indicated by oviposition rates, 2) larval predation, and 3) egg parasitism rates to determine any effect that proximity to the farm epicenter might have on each factor. Additionally, the experiment was duplicated in north central Florida, U.S.A and Guanacaste, Costa Rica, to test for any similarities or differences in the aforementioned factors and variables that may be attributable to location. It was found that butterflies tended to oviposit in greater numbers closer to the farm epicenter in north central Florida, suggesting that the farm could serve as an attractive force for gravid female butterflies. Although untested, components of the farm, such as enhanced host and nectar plant biomasses and high levels of conspecific density, could contribute to the higher butterfly abundance closer to the farm. The effect these components have on butterfly abundances and the