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Fig. 3. Water vapor exchange at different vapor activities in females of Culex
pipiens. For each point, the vapor exchange was determined as in
Fig. 1. ND25, mosquitoes reared
under a nondiapausing photoperiod (15 h:9 h, L:D) at 25°C; ND18,
mosquitoes reared under a nondiapausing photoperiod at 18°C; D18,
mosquitoes reared under a diapausing photoperiod (9 h:15 h, L:D) at
18°C.