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Seasonal changes in food habits of river otters in southwestern Arkansas beaver swamps

— The seasonal food habits of river otter (Lutra canadensis) in beaver swamps in southwest Arkansas were investigated through analysis of 240 scats. Crayfish occurred more frequently in otter scats during winter and spring, and fish occurred more frequently during summer and fall. Silvicultural practices required drainage of beaver swamps during spring, which resulted in rapid changes in water level and loss of otter foraging habitat. An abrupt shift in resource availability is believed to have caused the observed shift in otter food habits.