Figure 1. Response to selection.

Experimental evolution trajectories of populations evolving with a Pseudomonas entomophila oral (a) or systemic (b) infection and their respective control populations. Shown is the survival of flies from each selection regime when infected with P. entomophila either by (a) ingestion (orally) or, (b) pricking (systemic). Closed symbols: populations evolving in presence of the pathogen; open symbols: control lines. Vertical bars correspond to standard error across means of replicate lines; the straight dotted line corresponds to the original mortality rate imposed on the populations (66%).