Agonistic Interactions Between River Otters And Beavers: An Observation And Review
2008
Daniel Gallant | Andrew Sheldon
We describe a rare observation of reciprocal aggression between two river otters (Lontra canadensis) and a beaver (Castor canadensis). Our observations and other literature accounts suggest that the relationship between these species may not be the commensal onesuggested by some researchers. Because information on otter-beaver interactions in the literature is scarce and contradictory, we appeal for more information about behavioral interactions between the two species. Future research should aim to determine the frequency of these agonistic events and their overall cost to beaver survival and reproductive success, to determine if this relationship is really a commensal one or some integration of strong positive and negative effects.
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