Show simple item record

dc.creatorGonzález-Rojas,José I.
dc.creatorPadilla-Rangel,Hernaldo
dc.creatorRuvalcaba-Ortega,Irene
dc.creatorCruz-Nieto,Miguel A.
dc.creatorCanales-del-Castillo,Ricardo
dc.creatorGuzmán-Velasco,Antonio
dc.date2017-01-01
dc.date.accessioned2019-04-25T12:54:27Z
dc.date.available2019-04-25T12:54:27Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0716-078X2017000100401
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/63217
dc.descriptionAbstract Background The long-eared owl (Asio otus) has a Holarctic distribution, including much of North America. This nocturnal species is considered to be extremely secretive, and poorly known in the Great Plains of the United States and Canada, as well as to México, where no previous studies on its diet have been conducted. Findings We analyzed 120 pellets collected during January 2007 in roosts in a 2-3 m height mesquite scrub within a grassland area of Reserva Ecológica El Uno, located in the Natural Protected Area Janos. We registered and identified three orders, four families, eight genera and ten species of mammals and two orders and one family of insects. Winter diet is dominated by mammals, especially rodents in both frequency and biomass. Cricetidae and Perognathus flavus were the most frequent family and species, respectively. On the other hand, when analyzing biomass, Sigmodon species were dominant, achieving almost 70% of the consumed biomass. Levin's standardized niche breath based on frequency was calculated as 0.40, while based on biomass was 0.38. Also, two previously unrecorded rodent species were identified as long-eared owl prey. Conclusion Although 18 different types of items were identified, the long-eared owl tends to be selective, with a single genera (Sigmodon) comprising almost 70% of its consumed biomass during winter. Perognathus flavus was also important in frequency (21%); however, it barely constitutes 2% of the consumed biomass.
dc.formattext/html
dc.languageen
dc.publisherSociedad de Biología de Chile
dc.relation10.1186/S40693-017-0064-3
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceRevista chilena de historia natural v.90 2017
dc.subjectWinter diet
dc.subjectLong-eared owl
dc.subjectGrasslands
dc.subjectJanos
dc.subjectMéxico
dc.titleWinter diet of the long-eared owl Asio otus (Strigiformes: Strigidae) in the grasslands of Janos, Chihuahua, Mexico


This item appears in the following Collection(s)

Show simple item record