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Summer Feeding Habits of River Otter (Lutra canadensis) on the Mendocino National Forest, California

Tom Manning
Northwestern Naturalist
Vol. 71, No. 2 (Autumn, 1990), pp. 38-42
DOI: 10.2307/3536587
Stable URL: http://www.jstor.org/stable/3536587
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Summer Feeding Habits of River Otter (Lutra canadensis) on the Mendocino National Forest, California
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Abstract

The diet of otters was studied over one season on the Mendocino National Forest in northern California. Undigested prey remains were analyzed from 94 otter scats collected between 18 April and 29 August 1982. Fish were found to be the predominant food, occurring in 89.4% of the scats with a mean volume estimate of 63%. Fishes consumed were primarily catostomids and salmonids. Crayfish and snakes were common prey items as well. Insects were often found in otter scats, but represented little volume. Bird, turtle, frog, and snail remains occasionally were found in the scats.

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