Response variables
We counted the total number of adult Drosophila(di ) and the number of adult parasitoids
(pi ) that emerged from each vial. Proportion of
host survival (HS) was estimated using HS = di /T,
where T is the average abundance of flies that were reared in control
treatments. In cases where HS > 1 (cases where more
flies came out in the presence of parasitoids, compared to control
treatments without parasitoid), we set HS = 1. Parasitism rate (PR) was
estimated using PR = pi/ T. In cases where PR> 1 (cases where more parasitoids emerged than flies in
control treatment), we set PR = 1. Both estimates were used to help
account for differences in the number of Drosophila that a given
temperature and competition treatment supported.