Fig. 3.

The mean (±SEM) total licks (a, b), water intake (c, d) and total magazine entries (e, f) in FT-60s across 20 sessions of SIP pre-treatment and six sessions of SIP post-treatment for both Wistar and Lister Hooded rats. Rats are grouped in the SIP pre-treatment as high-drinker Wistar rats (WHD), low-drinker Wistar rats (WLD) and Lister Hooded rats (LH). Wistar rats are grouped in the SIP post-treatment as TRP non-depleted high drinkers (WHD T+), TRP-depleted high drinkers (WHD T−), TRP non-depleted low drinkers (WLD T+) and TRP-depleted low drinkers (WLD T−). Lister Hooded rats are grouped in the SIP post-treatment as TRP non-depleted (LH T+) and TRP-depleted rats (LH T−). Asterisks: statistical analyses indicate significant differences between HD T+ and HD T−. Number sign: statistical analyses indicate significant differences between WHD and WLD from that session onward