Quantity and relative intensity of skin peptides recovered from Pelophylax esculentus and P. lessonae in experimental treatments. (a) Peptide quantities recovered from frogs in each treatment at the end of the experiment indicating that frogs in peptide reduced treatments had recovered peptide stores by 64 days (compare to Figure 3). (b) Comparison of mean skin peptide intensities of samples collected from frogs at the end of each experimental treatment. Letters above bars indicate homogeneous subsets based on a Tukey post-hoc test within P. lessonae. Small sample size for P. esculentus precluded statistical analysis.