Assertion: sea otter's effect | /r/HasProperty | carswell et al.
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text: The effects of sea otters on commercial, recreational, and subsistence shellfish fisheries (Estes and VanBlaricom, 1985; Wendell et al., 1986b; Wendell, 1994; Watson and Smith, 1996; Larson et al., 2013; Hoyt, 2015) due to competition for prey have been among the most highly visible and politically charged of sea otters’ interactions with human activities (Carswell et al., 2015).