The South-American rattlesnake Crotalus durissus: feeding ecology in the central region of Brazil

  • Hoyos M
  • Almeida-Santos S
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Abstract

Abstract We investigated food patterns in the diet composition of 452 specimens of Crotalus durissus from Central Brazil. Thirty-three items were recorded corresponding to four categories: rodents (75.76%), marsupials (6.06%), unidentified mammals (9.09%) and reptiles (9.09%). Adults of both sexes and some juveniles feed mostly on mammals, specifically rodents, it is the most active and abundant prey throughout the year mainly in areas from Cerrado. In addition, we observed that in C. durissus there is a trend in the diet of females could be more diverse, maybe this can be associated to sexual differences involving different strategies of the feeding biology of this rattlesnake.Resumen Patrones de alimentación fueron investigados en la composición de la dieta de 452 ejemplares de Crotalus durissus de Brasil central. Treinta y tres ítems fueron registrados, correspondientes a cuatro categorías: roedores (75.76%), marsupiales (6.6%), mamíferos no identificados (9.09%) y reptiles (9.09%). Los adultos de ambos sexos e individuos jóvenes se alimentaron básicamente de mamíferos, en específico de roedores, esta es la presa más activa y abundante durante todo el año, principalmente en las áreas de Cerrado. Además fue observado que en C. durissus existe una tendencia a que la dieta de las hembras sea más diversa, factor que podría estar relacionado a las diferencias sexuales que implican diferentes estrategias de alimentación en la biología de esta serpiente cascabel.

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Hoyos, M. A., & Almeida-Santos, S. M. (2016). The South-American rattlesnake Crotalus durissus: feeding ecology in the central region of Brazil. Biota Neotropica, 16(3). https://doi.org/10.1590/1676-0611-bn-2014-0027

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