Vol. 25 Núm. 1 (2009)
Artículos

MAMMALIAN PREY OF BARN OWL (TYTO ALBA) IN SOUTHEASTERN OAXACA, MÉXICO

Antonio SANTOS-MORENO
1Laboratorio de Ecología Animal, Centro Interdisciplinario de investigación para el Desarrollo Integral Regional, Unidad Oaxaca, Instituto Politécnico Nacional. Hornos 1003, Santa Cruz Xoxocotlán, Oaxaca. C. P. 71230, MÉXICO. E-mail asantosm90@hotmail.com
Ana María ALFARO ESPINOSA
Universidad Autónoma Benito Juárez de Oaxaca, Escuela de Ciencias. Avenida Universidad S/N, Ex-Hacienda de Cinco Señores, Oaxaca, Oaxaca, MÉXICO. C. P. 68120. E-mail xelaku@hotmail.com

Publicado 2009-04-15

Palabras clave

  • Diet,
  • Owl pellets,
  • predation,
  • small mammals,
  • Tylomys nudicaudus.

Cómo citar

SANTOS-MORENO, A., & ALFARO ESPINOSA, A. M. (2009). MAMMALIAN PREY OF BARN OWL (TYTO ALBA) IN SOUTHEASTERN OAXACA, MÉXICO. ACTA ZOOLÓGICA MEXICANA (N.S.), 25(1). https://doi.org/10.21829/azm.2009.251606

Resumen

The analysis of pellet contents of Barn Owls from southeastern Oaxaca, Mexico, shows that mammals represent the main prey of this bird. We identified a minimum of 184 individuals from 2 orders, 3 families and 8 species of mammals. The greatest number of prey was from hispid cotton rat (Sigmodon hispidus), which represented 83.69% of the total individuals and 84.68% of the biomass of the sample. From the other 7 species included in the pellets, 3 were very uncommon species: the cozumelan golden bat (Mimon cozumelae), the false vampire bat (Vampyrum spectrum), and the Peter’s climbing rat (Tylomys nudicaudus). Bats represented 2.17% of prey number and 0.799% of the total biomass estimated in the sample. Comparisons of these results with the estimated abundances by standard trapping methods show differences. These results corroborate a general pattern of barn owl opportunistic predation over the locally most abundant species and bats as rare prey.