Figure 1. Typical actograms for different Nasonia species.

Representative actograms (double plotted) of male and female Nasonia are shown for standard strains in each species. Wasps were first entrained in LD 16∶8 (light phase from 8:00 to 24:00) for at least 4 days and then exposed to constant darkness (indicated with a gray background) for 8 days followed by constant light (white background). Y- and x-axes indicate time in days and hours, respectively.