Analysis of peak areas (as a per cent of the total) for 35 representative constituents of wolf urine samples A, B and C.

The median area is shown for six MS experiments. *Positively identified by GC-quadropole MS and by matching the retention times against identified chemicals in wolf urine. The chemicals without symbols were tentatively rather than positively identified by GC-quadropole MS. †Signifies a significantly higher peak area, whereas #signifies a significantly lower peak area, in sample C compared with either sample A or B, as assessed by the Kruskal-Wallis test and the Steel-Dwass post-hoc test.