Dieta de roedores sigmodontinos (Cricetidae) en los bosques montanos tropicales de Huánuco, Perú

Maggie C. Noblecilla, Víctor Pacheco

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

7 Citas (Scopus)

Resumen

We analyzed the stomach contents of five species of sigmodontine rodents: Akodon orophilus, Microryzomys altissimus, M. minutus, Thomasomys notatus, and T. kalinowskii, from mountain forests of Huánuco, Perú (2564 - 3850 m). We found that A. orophilus is an insectivorous species because the high volume of arthropods (adults and larvae) in the stomach contents (90.1%); T. notatus and T. kalinowskii are primarily herbivorous because they had a high volume of plant material of 89% and 67.75% respectively; whereas M. altissimus and M. minutus are omnivorous because they presented similar volume percentages for plants and arthropods. T. kalinowskii is considered a generalist species because it had the highest niche breadth (4.61), whereas A. orophilus is considered a specialist because it had the lowest value (1.70). Akodon orophilus registered a low coefficient of variation (CV= 20%) showing a preference for consuming adult arthropod, and also a significatively high consumption of arthropod larvae in the wet season, being the only species with a seasonal variation in the diet. On the other hand, the niche overlap was less than 0.75 in 80% of species pairs indicating low similarity in the diet, but greater than 0.75 between M. altissimus - T. notatus (0.822) and M. minutus - T. kalinowskii (0.816) suggesting a higher diet similarity. We conclude that these sigmodontine rodents, sympatric in the montane forests of Huánuco, exhibit dissimilar diets, probably as a strategy to prevent or lessen interspecific competition.

Título traducido de la contribuciónDiet of Sigmodontine rodents (Cricetidae) in tropical montane forests from Huánuco, Peru
Idioma originalEspañol
Páginas (desde-hasta)317-322
Número de páginas6
PublicaciónRevista Peruana de Biologia
Volumen19
N.º3
EstadoPublicada - dic 2012

Nota bibliográfica

Publisher Copyright:
© 2012 Facultad de Ciencias Biológicas UNMSM.

Palabras clave

  • Akodon
  • Huánuco
  • Microryzomys
  • Montane forest
  • Peru
  • Rodent diet
  • Sigmodontinae
  • Thomasomys

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