Field preferences of the Social Wasp Vespula germanica (Hymenoptera: Vespide) for Protein-rich Baits

Abstract

Las preferencias alimentarias mostrados por forrajeo insectos son importantes desde una perspectiva fundamental y en el control de plagas. Se estudió la preferencia de un invasiva avispa, V. germanica, de alimentos ricos en proteínas en condiciones de campo. Se evaluaron Preferencias mediante la colocación de cebos en un diseño pareado en diferentes hábitats y el análisis de las visitas de avispa, utilizando un enfoque bayesiano para el modelo de Thurstone.

Food preferences displayed by foraging insects are important from a fundamental perspective and in pest control. We studied the preference of an invasive wasp, V. germanica, for protein foods in field conditions. Preferences were evaluated by placing baits in a paired design in different habitats and analyzing wasp visits, using a Bayesian approach to the Thurstone model. V. germanica workers display a clear rating of preferences, but were affected by the presence of competitors at the bait. These results contribute knowledge aimed at toxic baiting protocols for this wasp and suggest that food choice is a complex process subject to the influence of diverse factors. We emphasize the importance of on-site paired comparisons in preference studies to fully understand the drivers of food choice by insects.