One coding makes use of a ‘lumping’ criterion, and the other uses a ‘splitting’ criterion.

Each of these criteria will be evaluated using cladistic analysis, recording how each coding criterion affects results.

Research suggests that humans evolved from a vegetarian lifestyle to the one including meat in their diets around 2.5 million years ago (at the dawn of the genus ) [8,9], though just how much of the prehistoric diet included animals is difficult to tell from archeological evidence [10].

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As a conclusion, and given our results, the use of more than one coding criterion is suggested when classifying rock art.

This work was supported by Universidad de Buenos Aires (UBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Agencia Nacional de Promoción Científica y Tecnológica (ANPCYT) grants.

In spite of its importance for rock art studies, rock art motifs coding and classification process is not always made explicit.

In this discussion of the process of rock art classification, we consider an exploratory research employing two different criteria for the coding of a northwestern Patagonian rock art motifs database.

The variety of interactions (both past and present) that human cultures maintain with animals is the subject matter of Ethnozoology, a science that has its roots as deep within the past as the first relationships between humans and other animals.

According to Sax [13], human attitudes towards animals probably evolved long before our first attempts to portray them artistically or examine them scientifically.

In this sense, it has been speculated that the origin of ethnozoology coincides with the appearance of humans as a species or, perhaps more correctly, with the first contacts between our species and other animals [14].

This view of ethnozoology assumes that these interactions are an integral part of human culture and society.

Other evidence of ancient human-animal relationships can be seen in rock paintings that depict wild animals such as bison, horses and deer with human figures hunting them.