Behaviour 2019
A Trade-off Between a Survival-Related Trait and Reproduction in Narnia femorata (Hemiptera: Coreidae)
Steven M. Smit1, Lauren A. Cirino2, James C. Boothroyd1, Sam Zlotnik1, Christine W. Miller1. 1University of Florida, Gainesville, FL, United States; 2University of Wisconsin-Milwaukee, Milwaukee, WI, United States

When growing a body, organisms must allocate resources across many traits. In females, there is an assumed trade-off between expensive traits related to survival and those to reproduction, though empirical results have shown conflicting evidence. In mobile animals, limbs can be a crucial trait for survival, helping them move towards food and escape predation. We prevented investment in the enlarged, metabolically expensive hind limbs of Narnia femorata (Hemiptera: Coreidae) by inducing hind limb loss in a subset of juvenile females. We predicted that females that were prevented from growing these large hind limbs would invest more heavily in producing offspring due to an anticipated investment trade-off between these characteristics. We did not find differences in mean egg production and hatch number over six weeks, nor survival, body size, or development rate. However, females that dropped both hind limbs laid significantly more eggs during in their second week after mating. This pattern suggests a trade-off in investment between the metabolically expensive hind limbs in N. femorata and early female reproduction.