Diet Composition of the Austral Pygmy Owl in a Peri-Urban Protected Area in South-Central Chile
Abstract
The diet of the Austral Pygmy Owl, Glaucidium nana, a small raptor, was studied by pellet analysis. During fall of 2020, 52 pellets were collected in a peri-urban protected area. Amongst 122 prey items, Muridae, represented exclusively by the alien species Rattus rattus and Rattus norvegicus, made up 35.24 % by number and 67.1 % of the biomass, followed by native Cricetidae, at a 37.69 % by number and 17.9 % by biomass. In the last place in relative frequency were birds and arthropods. The biomass contribution was unequal among the different prey, being the alien prey the group with the highest profit. The role of the landscape in the composition of prey in the observed trophic spectrum is discussed.
References
Chehébar, C., Martin, S. 1989. Guía para el reconocimiento microscópico de pelos de mamíferos. Doñana Acta Vertebrata, 16, 247-291.
Day, M. G. 1966. Identification of hair and feather remains in the gut and feces of stoats and weasels. Journal of Zoology, 18, 315-326.
Di Castri, E., E. Hajek. Bioclimatología de Chile. Ediciones Universidad Católica de Chile. 1-170.
Echeverría, C., Coomes, D., Hall, M., A. Newton. 2008. Spatially explicit models to analyze forest loss and fragmentation between 1976 and 2020 in southern Chile. Biological Conservation, 212, 439-449.
https://doi.org/10.1016/j.ecolmodel.2007.10.045
Egli, G. 2006. Voces de aves chilenas (Compact disc). Unión de Ornitólogos de Chile, Santiago de Chile.
Fernández, I., Simonetti, J. 2013. Small mammal assemblages in fragmented shrublands of urban areas of Central Chile. Urban Ecosystems, 16, 377-387.
https://doi.org/10.1007/s11252-012-0272-1
Figueroa, R., Corales, S. 2015. Registros ocasionales de presas consumidas por aves rapaces en áreas boscosas del sur de Chile. Boletín Chileno de Ornitología, 21, 150-154.
Fontúrbel, F.,Silva-Rodríguez, E. A., Cárdenas, N. H., Jiménez, J. E. 2010. Spatial ecology of monito del monte (Dromiciops gliroides) in a fragmented landscape of southern Chile. Mammalian Biology, 75, 1-9.
https://doi.org/10.1016/j.mambio.2009.08.004
Glanz, W. E. 1984. Ecological relationships of two species of Akodon in central Chile. Journal of Mammalogy, 65, 433-441.
https://doi.org/10.2307/1381090
González, L., Murúa, R. 1983. Características del periodo reproductivo de tres roedores cricétidos del bosque higrófilo templado. Anales del Museo de Historia Natural, 16, 87-99.
Greene, H., Jaksic, F. M. 1983. Food-niche relationships among sympatric predators: effects of level of prey identification. Oikos, 40, 151-154.
https://doi.org/10.2307/3544212
Hamilton, K. L., Neil, R. L. 1981. Food habits and bioenergetics of a pair of barn owls and owlets. American Midland Naturalist, 106, 1-9.
https://doi.org/10.2307/2425130
Hauenstein, E., Ramírez, C., Latsague, M. 1988. Evaluación florística y sinecológica del Monumento Natural Cerro Ñielol (IX Región, Chile). Boletín del Museo Regional de la Araucanía, 3, 7-32.
Ibarra, J. T., Gálvez, N., Gimona, A., Altamirano, T. A., Rojas, I., Hester, A., Laker, C., Bonacic, C. 2012. Rufous-legged owl (Strix rufipes) and Austral pygmy owl (Glaucidium nanum) stand use in a gradient of disrupted and old growth Andean temperate forests, Chile. Neotropical Studies on Fauna and Environment, 47, 33-40.
https://doi.org/10.1080/01650521.2012.665632
Ibarra, J. T., Altamirano, T.,Vergara, G., Vermehren, A., Vargas, F. H., Martin, M. 2015. Historia natural y autoecología del chuncho (Glaucidium nana) en el bosque templado de la Araucanía, sur de Chile. Boletín Chileno de Ornitología, 21, 29-40.
Jaksic, F. 1989. Opportunist, selective, and other often-confused terms in the predation literature. Revista Chilena de Historia Natural, 62, 7-8.
Jaksic, F. 1997. Ecología de los vertebrados de Chile. Ediciones Universidad Católica de Chile. 1-262.
Jaksic, F., Braker, E. 1983. Food-niche relationships and guild structure of birds of prey: competition vs. opportunism. Canadian Journal of Zoology, 61, 2230-2241.
https://doi.org/10.1139/z83-295
Jaksic, F., Medel, R. 1987. El acuchillamiento de datos como método de obtención de intervalos de confianza y de prueba de hipótesis para índices ecológicos. Medio Ambiente, 8, 95-103.
Jaksic, F. M., Feisinger, P., Jiménez, J. E. 1993. A long-term study on the dynamics of guild structure among predatory vertebrates at a semi-arid Neotropical site. Oikos, 67, 87-96.
https://doi.org/10.2307/3545099
Jaksic, F. M., Iriarte, A., Jiménez, J. E., Martínez, D. R. 2002. Invaders without frontiers: cross-border invasions of exotic mammals. Biological Invasions, 4, 157-173.
https://doi.org/10.1023/A:1020576709964
Jiménez, J. E., Jaksic, F. M. 1989. Biology of the Austral Pygmy Owl. The Willson Bulletin. 101, 377-389.
Jiménez, J. E., Jaksic, F. M. 1993. Variación estacional de la dieta del caburé grande (Glaucidium nanum) en Chile y su relación con la abundancia de presas. Hornero, 13, 265-312.
Jaksic, F. M., Iriarte, A., Jiménez, J. E., Martínez, D. R. 2002. Invaders without frontiers: cross-border invasions of exotic mammals. Biological Invasions, 4, 157-173.
https://doi.org/10.1023/A:1020576709964
King, C. M., Innes, J. G., Flux, M., Kimberley, M. O., Leathwick, J. R., Williams, D. S. 1996. Distribution and abundance of small mammals in relation to habitat in Pureora National Forest Park. New Zealand Journal of Ecology, 20, 215-240.
Kruuk, H., De Kock, L. 1980. Food and habitat of badgers (Meles meles L.) on Monte Baldo, northern Italy. Zeitschrift für Saugertierkunde, 46, 295-301.
Levins, R. 1968. Evolution in a changing environment. Princeton University Press. 1-120.
https://doi.org/10.1515/9780691209418
McPherson, S. C., Sumasgutner, P., Downs, C. T. 2021. South African raptors in urban landscapes: a review. Ostrich, 92, 41-57.
https://doi.org/10.2989/00306525.2021.1900942
Muñoz-Pedreros, A., Rau, J. 2004. Estudios de egagrópilas en aves rapaces. In: Muñoz-Pedreros, A., Yáñez, J. eds. Aves rapaces de Chile. CEA Ediciones, Valdivia, Chile, 265-279.
Muñoz-Pedreros, A., Gil, C. 2009. Orden Rodentia. In: Muñoz-Pedreros, A., Yáñez, J. (eds.). Mamíferos de Chile. Centro de Estudios Agrarios y Ambientales, Valdivia, 93-157.
Muñoz-Pedreros, A., Rau, J., Yáñez, J. 2019. Aves rapaces de Chile. CEA Ediciones Valdivia, Chile. 1-561.
https://doi.org/10.3897/zoologia.37.e55615
Murúa, R. 1982. Características de las huellas en cinco especies de roedores cricétidos. Boletín de la Sociedad de Biología de Concepción, 53, 76-86.
Murúa, R. 1996. Comunidades de mamíferos del bosque templado de Chile. In: Armesto, J., Villagrán, C., Arroyo, M. K., eds. Ecología de los bosques nativos de Chile. Editorial Universitaria, Santiago, Chile, 113-133.
Murúa, R, González, L. A., Meserve, P. 1986. Population ecology of Oryzomys longicaudatus philipii (Rodentia: Cricetidae) in Southern Chile. Journal of Animal Ecology, 55, 281-293.
Norambuena, H., Riquelme, D. 2014. Profesor Dr. Francisco Behn Kuhn (1910-1976) biografía y catálogo de su colección de aves chilenas. [Professor Dr. Francisco Behn Kuhn (1910-1976) biography and catalog of his collection of Chilean birds]. CEA Ediciones, Valdivia. 1-152.
Oberdorfer, F. 1960. Pflanzensoziologische Studien in Chile - Ein Vergleich mit Europa. Flora et Vegetatio Mundi, 2, 1-208.
Parera, A. F. 2018. Los mamíferos de Argentina y la región austral de Sudamérica. AP Ediciones Naturales, Argentina. 1-464.
Pavez, E. 2004. Descripción de las aves rapaces chilenas. In: Muñoz-Pedreros, A., Yáñez, J., eds. Aves rapaces de Chile. CEA Ediciones, Valdivia, 29-103.
Pearson, O. 1995. Annotated keys for identifying small mammals living in or near Nahuel Huapi National Park or Lanin National Park, southern Argentina. Mastozoología Neotropical, 2, 99-148.
Peña, L. 1992. Introducción al estudio de los insectos de Chile. Editorial Universitaria, Santiago, Chile. 1-253.
Rau, J. 2000. Métodos de análisis de ecología trófica. In: Muñoz Pedreros, A., Yáñez, J., eds. Mamíferos de Chile. [Mammals of Chile] CEA Ediciones, Valdivia, 397-406.
Rau, J. R., Martínez, D. R., Yáñez, J. 1985. Dieta de la lechuza blanca, Tyto alba (Strigiformes, Strigidae) en el sur de Chile. Boletín del Museo Regional de la Araucanía, 2, 134-135.
Rozzi, R., Martínez, D., Willson, M. F., Sabag, C. 1996. Avifauna de los bosques templados de Sudamérica. In: Armesto, J., Villagrán, C., Arroyo, M. K., eds. Bosques templados de Sudamérica. Editorial Universitaria, Santiago, 132-152.
Schoener, T. W. 1968. Sizes of feeding territories among birds. Ecology, 49, 123-141.
https://doi.org/10.2307/1933567
Solaro, C. 2018. Costs and benefits of urban living in raptors. In: Sarasola, J. H., Grande, J. M., Negro, J. J., eds. Birds of prey - Biology and consevation in the XXI century. Springer Verlag, Switzerland, 177-196.
https://doi.org/10.1007/978-3-319-73745-4_8
Speziale, K. L., Lambertucci, S. A. 2013. The effect of introduced species on raptors. Journal of Raptor Research, 47, 133-144.
https://doi.org/10.3356/JRR-12-00003.1
Zúñiga, A. H., Fuenzalida, V., Sandoval, R. 2018. Hábitos alimentarios de la lechuza blanca Tyto alba en un agroecosistema del centro-sur de Chile. Ecología en Bolivia, 53, 7-15.
Zúñiga, A. H., Muñoz-Pedreros, A., Quintana, V. 2021 a. Seasonal variation in a small-mammal assemblage in a priority site for conservation in South-central Chile. Zoodiversity, 55 (5), 395-404.
https://doi.org/10.15407/zoo2021.05.395
Zúñiga, A. H., Sandoval, R., Fuenzalida, V. 2021 b. Seasonal dynamics of bird assemblages in commercial plantations of Pinus radiata in southern-central Chile. Ornis Hungarica, 29 (2), 46-58.
