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Se analizó la relación entre la abundancia de artrópodos y frutos maduros, con el comportamiento alimentario y dieta de un grupo de Cebus apella en la Amazonía colombiana durante 1999. La oferta de frutos se midió por transectos fenológicos y la abundancia de artrópodos por capturas manuales. La oferta de ambos recursos varió a lo largo del año, lo que permitió establecer tres períodos de disponibilidad combinada: abundancia, oferta intermedia y escasez. Se completaron 708 horas de seguimiento al grupo y con el método de barrido lento se determinó una dieta omnívora, siendo principalmente insectívora - frugívora (48.8% - 42.9%). Los maiceros consumieron 96 especies de plantas y la diversidad mensual de frutos en la dieta, no se correlacionó con la oferta de los mismos. En los meses de abundancia de recursos, tanto frutos como artrópodos fueron consumidos en altas cantidades, y los frutos presentaron una distribución agrupada. Durante los períodos de escasez de recursos, la dieta incluyó pocas especies de frutos, considerados clave, de difícil manipulación, como Cariniana micrantha (Lecythidaceae), y fue complementada con partes vegetales. A diferencia de otros estudios, durante la escasez de frutos, no se presentó el mayor consumo de artrópodos, puesto que éstos igualmente escaseaban. Los maiceros mostraron una dieta generalista - oportunista y utilizaron los recursos en la proporción en la que estuvieron disponibles. Así por ejemplo, los valores de selectividad para frutos fueron muy bajos, y las tasas de éxito de captura de artrópodos se correlacionaron con la disponibilidad de los mismos. The relation between the abundance of fruits and arthropods, and the diet and feeding behavior of a group of Cebus apella was studied in the Colombian Amazon during 1999. Fruit availability was measured using phenological transects, and the abundance of arthropods by using manual captures. The abundance of both resources varied throughout the year, which allowed establishing three periods of availability: abundant, intermediate, and scarce availability. 708 hours of monkey observations were completed, and using slow scans, it was determined that they had an omnivorous diet, being principally insectivorous - frugivorous (48.8% - 42.9%). Capuchins consumed 96 plant species, and the monthly diversity of fruits in the diet was not correlated with the fruit availability. During months of resource abundance, both arthropods and fruits were eaten in high quantities, and fruits showed clumped distribution. During fruit and arthropod shortage periods, the diet included a few key fruit species of hard manipulation, such as Cariniana micrantha (Lecythidaceae), and was complemented by vegetable parts. Unlike other studies, during the fruit shortage, the capuchins did not present the higher consumption of arthropods, since these items were also scarce. Capuchins showed an opportunistic diet, and the resources were used in the same proportion in which they were available. For example, the values of fruit selectivity were very low, and the arthropods capture rates were correlated with their availability

acta amazonica

Dieta y comportamiento alimentario de un grupo de mico maicero Cebus apella de acuerdo a la variación en la oferta de frutos y artrópodos, en la Amazonía colombiana