“…Transfer of aquatic organisms in anglers' bait buckets is the prevailing source for fish introductions throughout the Great Plains (Hall, 1956;Hoagstrom & Brooks, 2005;Miller, 1953;Moyer et al, 2005;Patrikeev, Bonner & Trujillo, 2005;Robison, 1974a). However, other factors include colonization upstream of reservoirs (Gido & Franssen, 2007;Quist, Hubert & Rahel, 2004), intentional introduction for biological control (Louda, Arnett, Rand & Russell, 2003;Schleier, Sing & Peterson, 2008) and natural migration during high-flow events between proximally close tributaries (Hall, 1956;Miller, 1953). These introductions have the potential to spread foreign parasites and disease (Marcogliese, 2001) and can result in predation of native fishes by exotic piscivores (Gido & Franssen, 2007;Quist et al, 2004), hybridization (Cook, Bestgen, Propst & Yates, 1992;Miller et al, 1989) and competition within the PBS guild (Cross, Gorman & Haslouer, 1983;Felley & Cothran, 1981;Hoagstrom, Zymonas, et al, 2010;Miller, 1953;Moyer et al, 2005) and among reproductive guilds (Schleier et al, 2008).…”