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Fig. 1. Effects of temperature and ambient oxygen partial pressure
PO2 on development of eggs of Manduca
sexta. Eggs were exposed to experimental conditions from within 6 h of
oviposition until hatching. Ten eggs were exposed to each combination of
factors (240 eggs total), and all treatments were started simultaneously. (A)
Fraction hatching in each combination of temperature and oxygen. (B) Total
development time from oviposition to hatching, including only those that
actually hatched. In all cases, standard errors were so small that they are
hidden by their respective symbol.