Figure 4. Representative ion m in Odorants Differentiate Australian Rattus with Increased Complexity in Sympatry

Figure 4. Representative ion m/z 60 trace with post-run selected ion chromatograms for thiazolines and carboxylic acids from preputial gland extracts of (A) Rattus fuscipes assimilis (QMJM 19152); (B) R. fuscipes coracius QMJM 19100; (C) R. leucopus cooktownensis QMJM 19131; and (D) R. leucopus leucopus QMJM 19060. Numbers above peaks identify specific compounds: (1) 2-methylthiazoline, 10.56 min; (2) 2-ethylthiazoline, 16.04 min; (3) 2-isopropylthiazoline, 19.59 min; (4) 2-propylthiazoline, 22.49 min; (5) 2-sec-butylthiazoline (SBT), 25.89 min; (6) 2-isobutylthiazoline, 26.10 min; (7) 2-butylthiazoline, 29.85 min; (8) dodecanoic acid, 56.28 min; (9) tetradecanoic acid, 67.25 min; (10) pentadecanoic acid, 72.34 min; and (11) hexadecanoic acid, 77.50 min.