“…These differences have been observed in nonconsanguine rats (i.e., Lancaster et al, 1996), as well as in rats genetically selected for their high or low ethanol consumption levels (i.e., Le et al, 2001;Chester et al, 2006). Furthermore, these differences between males and females have been observed using various methods, not only 24 h access to ethanol (Cacace et al, 2011(Cacace et al, , 2012Doremus et al, 2005;Yoneyama et al, 2008), but also limited access to ethanol with access to two bottles (Le et al, 2001;Vetter-O'Hagen et al, 2009), and with operant self-administration models (Blanchard et al, 1993;Blanchard and Glick, 1995). Vetter-O'Hagen et al (2009), using a 2 h limited-access to ethanol model, found that the ethanol consumed varied as a function of sex and age, although the sex differences that emerged at each age were opposites: adolescent males consumed more ethanol than both the adolescent and adult females, while in adulthood, echoing the data in the previous paragraph, the females consumed more ethanol than the males.…”