Insemination of virgin females mated with An. arabiensis males irradiated in pupal or adult stage for the different treatments. Triangles represent pupal individual values, circles adult individual values. Detransformed means (± SE if n>2) are indicated by a horizontal line. Linear regression lines (± 95% CI) are given; solid line is pupae, dotted line adults. For clarity purposes, data points for pupae have been shifted slightly to the left.