The frequency of courtship behaviors between SB-treated flies and untreated flies.

The frequency of courtship behaviors and successful copulations was
measured in pairs where either the male (SB–M) or female
(SB–F) was fed 3.0 mM of the antagonist and paired with an
untreated partner. The frequency of all early courtship behaviors
(orient and wing vibrations) was reduced only slightly, but later
behaviors (licking, curling and copulation attempts) was
significantly decreased in these pairs when compared to untreated
control flies. In both experimental sets, successful copulation was
never observed. (n = 10 observed pairs for each
behavior, *p<0.001 by Fischer's Exact test).