Effects of sex, seed size and amount of dietary fiber on retention time of captive black howler monkeys 19 de noviembre de 2019 Webmaster Raymundo T.M. dos Santos Neto, Roberto Guevara, Maria A. Lopes Artículo Palabras clave: Alouatta caraya, composição da dieta, diet composition, dispersão de sementes, efetividade de dispersor de sementes, gastrointestinal passage time, seed dispersal, seed disperser effectiveness, tempo de passage gastrointestinal