High skull asimmetries in Araucan horse from Colombia
Muñoz, F. A.
Alejandro-Crosby, R. A.
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Fluctuating asymmetry (FA) is defined as the deviation of an individual from their perfect bilateral symmetry, and is considered a negative indicator in the ability to resist small anomalies in the development. These abnormalities are usually the result of genetic or environmental stress. In the present
study, we studied by means of 2-D geometric morphometric techniques a sample of 20 skulls of adult horses belonging to Araucan breed (Colombia), a saddle horse which lives under a natural environment and managed under extensive conditions. It was obtained a digital photograph of dorsal aspect of each specimen, on which 7 paired and homologous landmarks were subsequently located. There appeared a significant presence of significative FA, which could be explained as a response to stress, probably due to extreme environmental pressures and/or management.