Variation of local zoological knowledge about Southern river otter and other semi-aquatic mammals in Nahuel Huapi National Park (Argentina).

Positive identification was not affected by any variable, with the exception of people with permanence between 20 and 40 years, who identified the huillín less than those with permanence of less than 20 years; however, this tendency is marginally significant (z-value: − 2.004; p = 0.2691, Table 2 ).

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In addition, it could increase public awareness towards its conservation, a positive trend that has been recorded in the study of other otter species [ 38 ].

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