Fig. 6. Behavioural response of a receiver to offensive behaviour without urine
release (filled columns; O, N=174 bouts) and to offensive behaviour
accompanied by urine release (`offensive urine release'; open columns; O+U,
N=86 bouts). Responses are measured as changes in the relative
frequency of certain agonistic levels (levels -2, -1, defensive behaviour;
levels 0, A, neutral behaviour; levels 1-5, offensive behaviour; see Materials
and methods) from the preceding to the current time interval. Asterisks denote
significant differences between the responses to offensive urine release and
responses to offensive behaviour (**P<0.01;
multivariate ANOVA). Values are means +1 S.E.M.
