Fig 8. Lower and Upper bounds on the amount of water Δw that a WF wasp is expected to transfer to an accepting CS wasp (8A) and on the number of successes S needed for a WF wasp to completely rid its load (8B) when the common stomach water level is w.

These bounds follow from the bounds on the assumed resistance function: Resistance with σ = 0 (black solid line) defines an upper bound on Δw and hence a lower bound on S. Resistance with σ = ∞ (grey dashed line) defines a lower bound on Δw and hence an upper bound (for w < 0.5) on S.