Wetland use by river otters in Massachusetts

The use of northeastern US wetlands by river otters (Lutra canadensis) was studied to determine the effects of wetland dynamics on river otter populations. Wetland types and seasonal variation in wetland use was characterized, using river otter latrine revisitation rates as an index of total habitat use. Results showed that river otter wetland habitats are those created by beavers and humans by impoundment, as well as lotic or unimpounded wetlands. Techniques for identifying river otter habitats are presented.