Presence of domestic pigs or cross-bred animals
The hunter’s questionnaire assessed the observation of contacts between
both populations in hunting areas and the presence of domestic pigs or
cross-bred individuals in hunting grounds during the last 10 years. For
the former, a list of criteria suggesting potential hybridization
features were provided including white spots in the fur, shape of the
body, short snout, falling ears, thick fat layer and large litters. The
questionnaire requested to qualitatively characterize the frequency of
observation as “Low” if only one observation reported, “Medium” if
less than 5 observations were reported and “High”, if more than 5
observations were reported.