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Mammalian Biology

, Volume 73, Issue 5, pp 337–341 | Cite as

Diet of some species of Neotropical small mammals

  • Sônia A. TalamoniEmail author
  • Denise Couto
  • Dirceu A. CordeiroJúnior
  • Fernanda M. Diniz
Original Investigation

Abstract

Dietary analysis was performed to determine the variations in diet of some small neotropical species of mammals collected in seasonal areas of the cerrado (a savannah-like grassland) and semi-deciduous forest. Food items were determined based on the analysis of stomach contents of 126 animals (one didelphid and five sigmodontine rodent species). Most species presented herbivorous-omnivorous habits, with a preference for the vegetative parts of plants. Akodon montensis Thomas (1913) was the most abundant species in the forest area and demonstrated a uniform consumption of animal and vegetal items through the year, and contained 65.7% plant material in its diet. Necromys lasiurus (Lund, 1841) was the most abundant in the cerrado with 72.6% of vegetation in its diet, but showed a high consumption of animal items during the rainy season. Oligoryzomys nigripes (Olfers, 1818) contained 95.1% of plant material, while Oxymycterus delator (Thomas, 1903) consumed 61.6% invertebrates, mainly insects. The didelphid Philander frenatus (Olfers, 1818) consumed invertebrates (47.7%), small vertebrates (7.3%) and plant material (44.9%).

key words

Akodon Necromys herbivorous diet stomach contents 

Nahrungsanalysen einiger kleiner neotropischer Säugetiere

Zusammenfassung

Zum Studium der Variation der Ernährung wurden neotropische Kleinsäuger untersucht, die im Cerrado (Savannen-ähnliche Landschaft) und halb-immergrünen Waldzonen leben. Der Mageninhalt von 126 Tieren (eine Beutelratte und fünf Nagetierarten der Unterfamilie Sigmodontinae) wurde untersucht und identifiziert. Die Arten waren teilweise als Herbivore, teils als Omnivore zu bezeichnen, doch zogen sie vegetative Pflanzenteile als Nahrung vor. Im Wald war Akodon montensis Thomas (1913) die häufigste Art. Sie konsumierte im Laufes des Jahres tierisches und pflanzliches Futter recht gleichmässig, doch machten Pflanzenteile etwa 65,7% der Nahrung aus. Necromys lasiurus (Lund, 1841) war die häufigste Art im Cerrado, mit 72,6% pflanzlichen Bestandteilen der Nahrung. Während der Regenzeit nahm sie aber einen grossen Anteil tierischer Nahrung auf. Die Nahrung von Oligoryzomys nigripes (Olfers, 1818) umfasste 95,1% pflanzliches Material, während die Nahrung von Oxymycterus delator (Thomas, 1903) 61,6% wirbellose Tiere beinhaltete, wobei Insekten überwogen. Die Beutelratte Philander frenatus (Olfers, 1818) konsumierte Wirbellose (47,7%), kleine Wirbeltiere (7,3%) und Pflanzen (44,9%).

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Copyright information

© Deutsche Gesellschaft für Säugetierkunde 2007

Authors and Affiliations

  • Sônia A. Talamoni
    • 1
    Email author
  • Denise Couto
    • 1
  • Dirceu A. CordeiroJúnior
    • 1
  • Fernanda M. Diniz
    • 1
  1. 1.Conservation, Ecology and Behaviour Group, Post-graduate Programme in Vertebrate ZoologyPontifical Catholic University of Minas GeraisBelo HorizonteBrazil

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