Con el fin de comprender y analizar los factores culturales que inciden en la tenencia de monos aulladores ( Alouatta seniculus ) como mascotas y los impactos de esta practica sobre los individuos en cautiverio, se analizaron diez casos de monos aulladores que fueron decomisados y remitidos entre septiembre de 2007 y junio de 2008, al programa de rehabilitacion y reintroduccion para la especie. Para esto se aplico una encuesta a los duenos de los monos aulladores para determinar los factores que motivaron la compra de los animales y el trato que se le daba a estos dentro de la familia. De igual forma, durante el primer mes pos-decomiso, se determinaron los comportamientos mas comunes y el patron de actividad, en estos monos aulladores que fueron mascotas, como indicador del efecto de la convivencia con humanos sobre los animales. Se encontro que el 40% de las personas compro el animal para tenerlo como mascota, mientras que el 60% lo hizo empujado por un sentimiento de proteccion o lastima hacia el animal. El 80% de los animales eran tratados como humanos, proporcionandoles alimentos preparados y golosinas. Los monos adultos presentaron mayor dificultad que los infantes para adaptarse a las nuevas condiciones de vida pos-decomiso. El patron de comportamiento tanto de adultos como de infantes mostro que los animales decomisados, a diferencia de los silvestres, invierten la mayor parte de su tiempo en interacciones sociales e invierten poco en descanso, ademas que los adultos invierten tiempo en movimientos estereotipados y estando aislados del grupo. Abstract In order to understand and analyze cultural factors that affect the tenure of howler monkeys ( Alouatta seniculus ) as pets and the impacts of this practice on individual in captivity, was analyzed ten cases of howler monkeys that were confiscated and sent to the rehabilitation and reintroduction program for this specie between September 2007 and June 2008. For this was done a survey to the owners of howler monkeys to determine the factors that motivated the purchase of animals and the treatment was given to them within the family. Similarly, during the first month of post-confiscate, were identified the most common behaviors and activity patterns in these howler monkeys that were pets, as an indicator of the effect of coexistence with humans over animals. It found that 40% of people bought the horse for him as a pet, while 60% did so driven by a sense of protection or pity for the animal. 80% of the animals were treated as humans, providing foods and sweets. The adult monkeys had more difficulty than infants to adapt to new conditions of life post-confiscate. The pattern of behavior of both adults and infants showed that the confiscated animals, unlike the wild spend most of their time in social interactions and invest little in sleep, as well as adults spend time in isolation and being stereotyped movements the group.