RESUMENPara determinar la dieta de la lechuza de campanario (Tyto alba Scopoli, 1769) fueron colectadas 592 egagrópilas desde Enero hasta Diciembre de 2010, en la Estación Experimental del Instituto Nacional de Investigaciones Agrícolas, Calabozo, estado Guárico, Venezuela. Adicionalmente, en el sitio se registró la precipitación mensual durante la época seca y de lluvia. En el laboratorio, cada una de las egagrópilas fue medida para determinar tamaño y peso. Posteriormente fueron procesadas en seco para estimar la cantidad total de presas consumidas, especies en algunos grupos, número promedio de presas/egagrópila y las relaciones entre: número de presas consumidas y peso de las egagrópilas; y número de presas y la precipitación. Los promedios de peso, longitud y ancho de las egagrópilas fueron: 3,6 g ± 1,5, 2,7 cm ± 0,6 y 1,8 cm ± 0,4, respectivamente. La dieta de T. alba incluyó 847 presas, las cuales estuvieron conformadas por roedores (Zygodontomys brevicauda, Sigmodon alstoni, Holochilus sciureus y Oligoryomys sp.) (99,30%), aves (Cuculidae y Passeriformes) (0,23%) y murciélagos (Mollosus sp.) (0,47%). El promedio de individuos por egagrópila fue 1,5 ± 0,4. El peso de las egagrópilas fue proporcional a la cantidad de presas (r = 0,4377; P = 0,000). El número de presas consumidas y la precipitación estuvieron relacionados de manera inversa (r = -0,7304; P = 0,007), la composición de la dieta de la lechuza no varió en ambos periodos. T. alba mostró ser un cazador potencial de roedores, útil en control biológico de roedores en el cultivo de arroz en Venezuela. ABSTRACTIn order to determine the diet of the Barn Owl (Tyto alba Scopoli, 1769), 592 pellets were collected from January to December 2010 at one month interval, at the National Institute of Agricultural research's experimental center, in Calabozo, Guárico State, Venezuela. In addition, precipitation records during the dry and rainy seasons were obtained at the field research site. In the laboratory, each pellet was measured to determine size and weight. Then, each pellet was dry-processed to estimate total amount of consumed prey, species in some groups, the average number of prays per pellet and the relationship between the number of consumed preys and pellet´s weight and between number of preys and rainfall. Mean weight, length and width of pellets were: 3.6 g ± 1.5, 2.7 cm ± 0.6 and 1.8 cm ± 0.4, respectively. The owl´s diet included 847 preys, comprised by rodents (Zygodontomys brevicauda, Sigmodon alstoni, Holochilus sciureus and Oligoryomys sp.) (99.30 %), birds (Cuculidae and Passeriformes) (0.23 %) and bats (Mollosus sp.) (0.47 %). The average number of individuals per pellet was 1.5 ± 0.4. Pellets weight was directly related to number of prey (r = 0.4377; P = 0.000). Number of consumed prey and rainfall were inversely related (r = -0.7304; P = 0.007), however, diet composition was not affected by either rainy or dry season. T. alba showed to be a potential hunter of rodent and it can be useful as a biological agent against invasive rodent spe...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.