Figure 4
![Figure 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1741-7007-8-25/MediaObjects/12915_2009_Article_321_Fig4_HTML.jpg)
Urine release by female crayfish during different categories of behaviours. Values are mean urine release as a percentage of total time spent displaying each behaviour (± standard error of the mean (SEM)). Behaviours not labelled by the same letter denote significant differences (P < 0.05, post hoc Tukey test).