Right whale mortality due to entanglements in fishing gear and collisions with ships is known throughout the Southern Hemisphere (IWC 2001). In Chile, two whale deaths from human activities are known. One was a calf harpooned by fishermen (Aguayo et al. 1992) and the other was a calf that stranded after being struck by a vessel (Canto et al.1991). Mortality caused by entanglements and vessel strikes is a very serious issue for western North Atlantic right whales. Similarly, any human-caused mortality in the subpopulation off Chile and Peru, especially of females, would have a serious impact on the subpopulation.