Fig. 6. Characteristics of vitellogenin profiles in response to timing of gonadotropin treatments (early or late initiation of juvenile hormone analog; JHAi). (A) Female lubber grasshoppers subjected to late JHAi had vitellogenin profiles consistent with favoring current reproduction at the expense of future reproduction, relative to females on early JHAi (P=0.001) (B). Values (mean ± s.e.m.) on the graphs show, from left to right, time from JHAi to vitellogenin onset, time from JHAi to vitellogenin maximum, maximum level of vitellogenin, and time from vitellogenin maximum to oviposition.