Traditional use and perception of snakes by the Nahuas from Cuetzalan del Progreso, Puebla, Mexico.

BACKGROUND: Indigenous cultures are the result of their adaptation to the natural surroundings, in such a way that, amongst their main features is a set of knowledge, technologies and strategies for the appropriation of nature. In Cuetzalan del Progreso, Puebla, Mexico snakes represent 71.1% of the total local herpetofauna; and in addition to this, different groups of Nahuas have shown to have information of their use of various snake species in many ways. This study was conducted to investigate the traditional uses of snakes in this cultural group. METHODS: Formal and informal interviews were conducted with the inhabitants of the communities. During these interviews, 30 images of the different species of snakes present in the area were presented to the subjects, so that they would recognize them and reveal information about the knowledge they possess on them. A usage analysis was applied to each species considering the following categories: food purposes, medicinal, artisanal and magical-religious. Likewise, the frequency, the diversity and the value of use was estimated for these snakes. RESULTS: A total of 51 interviews were carried out. The individuals recognized 18 out of 30 images of snakes that were presented. The total of usage categories was five; we found that the magic-religious use was the most mentioned by 32 personas. Boa imperator and Antropoides nummifer were the species with the highest value of use. More than half of the interviewees mentioned killing snakes because they're poisonous and aggressive. In the magic-religious aspect the "Danza de los Negritos" is highlighted; this is a local festival, brought by Africans, and alludes to snakes. CONCLUSIONS: This study revealed that snakes are still very important for the culture in Cuetzalan del Progreso, finding that the magical-religious and the medicinal use stand out. On the other hand, the fear and misperception on the toxicity of snakes might represent a potential threat for their conservation. Therefore, it is necessary to carry out a long-term monitoring of the ethno-zoological activities, and develop a sustainable management plan compatible with the cultural characteristics of the natives of the region.

Uso medicinal de serpientes comercializadas en dos mercados de la ciudad de México / Medicinal use of snakes sold in two markets in Mexico City

En México, desde tiempos prehispánicos, a las serpientes se le ha atribuido una poderosa capacidad curativa, debido a su importancia simbólica y mítica. Por consiguiente, han sido de los vertebrados más utilizados en la medicina tradicional para curar diversas afecciones. No obstante su considerable comercio para este fin, se desconocen las especies de serpientes utilizadas y los factores implicados en dicha práctica. La presente investigación tiene como objetivo identificar a dichas especies, las partes empleadas, padecimientos que curan y costos de los productos. Mediante entrevistas realizadas en 2009a comerciantes de los mercados de Sonora y Xochimilco, Distrito Federal, así como la identificación de las pieles y cabezas adquiridas, se registraron seis especies: Crotalus atrox, C. simus, C. scutulatus, C. molossus, C. ravus y Boa constrictor, siendo las dos primeras las que se expenden con mayor frecuencia (40% y 30% respectivamente). La carne se usa para curar el cáncer y diabetes, mientras que la piel, colmillos y cabezas se adquieren como amuletos protectores. Se discute sobre la persistencia del atributo mágico de las serpientes, presente en su poder curativo, y la actualización de las enfermedades y sus tratamientos.