Review of the Negative Influences of Non-native Salmonids on Native Fish Species

Non-native salmonids are often introduced into areas containing species of concern, yet a comprehensive overview of the shortand long-term consequences of these introductions is lacking in the Great Plains. Several authors have suggested that non-native salmonids negatively influence species of concern. The objective of this paper is to review known interactions between non-native salmonids and native fishes, with a focus on native species of concern. After an extensive search of the literature, it appears that in many cases non-native salmonids do negatively infl uence species of concern (e.g., reduce abundance and alter behavior) via different mechanisms (e.g., predation and competition). However, there are some instances in which introduced salmonids have had no perceived negative infl uence on native fi shes. Unfortunately, the majority of the literature is circumstantial, and there is a need to experimentally manipulate these interactions.