CRH and Anxiety: As CRF clearly plays a role in trout social behavior (Carpenter et al., 2009a; Backström et al., 2011a,b; Backström and Winberg, 2013), and because previous results suggest that CRF is associated with anxiety and indecision (Carpenter et al., 2007, 2009a; Backström et al., 2011a), we hypothesized that this anxiogenic neuropeptide generates stereotypic behavior as it does in other vertebrates.