Behaviour 2019
Reproductive trade-offs in the Soapberry Bug Jadera haematoloma (Insecta: Hemiptera: Rhopalidae)
Amberlika Guruvadoo1, Michael Forthman2, Sam Zlotnik1, Christine W. Miller1. 1University of Florida, Gainesville, FL, United States; 2California Department of Food & Agriculture, Sacramento, CA, United States

Many animals use weapons to compete for mates, yet investment in sexually selected weapons can limit resources available for other reproductive tissues, such as testes. True bugs (Hemiptera) in the superfamily Coreoidea have been extensively studied to understand the trade-offs between their weaponized, sexually dimorphic hind legs and their testes. However, not all species of coreoids use their hind legs as weapons. Thus, it is unclear if the documented trade-off is due to the role of these traits in reproduction or simply because they contain costly tissues. We investigated these hypotheses by testing the tradeoff between hind legs and testes in a coreoid species with sexually monomorphic hind legs, Jadera haematoloma (Rhopalidae). We induced leg loss in juvenile J. haematoloma and weighed the testes of each reproductive adult to determine if bugs with one hind leg grew larger testes than those with two hind legs. Furthermore, we examined whether there were differences in testes growth associated with the long- and short-wing morphs of J. haematoloma. These results will contribute to our understanding of resource allocation, sexual selection, and the evolution of mating systems.