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The River Otter In Idaho: Reproductive And Population Parameters And Liver Concentrations Of Environmental Contaminants, Gina Diggs
Boise State University Theses and Dissertations
To obtain current data on the North American river otter (Lontra canadensis) population in Idaho, licensed trappers were mandated to surrender river otter carcasses through provisions of the Idaho Department of Fish and Game’s mandatory harvest report. Throughout the 2002-2003 and 2003-2004 trapping seasons, 237 river otter carcasses were collected. Necropsies were performed to assess age and sex, general body condition, reproductive rates, and concentrations of environmental contaminants in the livers. Reproductive rates were determined by counting corpora lutea and blastocysts in female river otters. Livers were dissected and concentrations of environmental contaminants were determined for the following …