Studies related to local ecological knowledge are subjective and complex, because they are based on beliefs and symbols of a community [49]. The qualitative approach, in which reports of local members are obtained, showed to be appropriate for these studies related to cultural perception, because it does not quantify, but allows the approach between subject and object. This enables the researcher to better understand the historical, social and cultural context. A qualitative research is concerned with meaning and not with generalized hypothesis statements. The occurrence of the data is useful to understand the subjective process of a culture, thus frequencies are rarely important in this line of research [50]. In qualitative studies, if the sample is too large, obtaining new data does not introduce new information related to the objectives of the research, which can become repetitive [51].