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Original Article

Body size in predator–prey interactions: an investigation of Neotropical primates and their predators

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Pages 81-87 | Received 14 Aug 2012, Accepted 22 Mar 2013, Published online: 02 May 2013
 

Abstract

Small predators tend to eat small prey, whereas larger predators attack predominantly larger prey. Neotropical primates form a substantial proportion of the total food resource available to predators, but their interactions are poorly addressed. We investigated through a review of the literature whether the body mass of predators predicts primate body mass. The mean size of predator species explained 53% of the variation in the size of the primates. Large felids, especially the jaguar, concentrate their efforts on large primates. Body size is a fundamental underlying factor in the evolution of trophic relations between Neotropical primates and their predators.

Predadores de pequeno porte tendem a consumir presas pequenas, enquanto predadores maiores atacam predominantemente presas maiores. Os primatas neotropicais formam uma proporção relevante do volume total de recurso alimentar disponível para os predadores, mas as interações entre eles são pouco estudadas. Nós investigamos, através de revisão da literatura, se a massa corporal dos predadores determina a massa corporal dos primatas. O peso médio das espécies de predadores explicou 53% da variação no tamanho dos primatas. Felinos de grande porte, especialmente a onça, concentram seus esforços em primatas de maior porte. O tamanho do corpo é um fator fundamental e determinante na evolução das relações tróficas entre os primatas neotropicais e seus predadores.

Acknowledgments

We thank Ricardo Sawaya for kindly providing body mass values of Bothrops jararaca and Lígia Pizzatto for sharing literature.

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