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1.
Acta biol. colomb ; 22(1): 105-109, ene.-abr. 2017. ilus, tab
Article in English | LILACS | ID: biblio-886048

ABSTRACT

ABSTRACT The Striped Owl (Pseudoscops clamator) has a wide geographic distribution despite that there is scarce information on its reproductive biology. In this study, we present the first published nesting records of P. clamator for Colombia. We provide data on its nesting habits and reproductive biology from observations between April and May 2013 of a nest found in a plantation of Eucalyptus globulus in Cajicá, Cundinamarca, Colombia. The ground nest is similar to those described from Argentina, Brazil, and Suriname; with a clutch of two where only one chick survived and left the nest after 25-30 days. We found in the owl diet, Brazilian guinea pig (Cavia aperea) and Eared Dove (Zenaida auriculata). Little is known about other species predated by the Striped Owl or whether this species has more than one reproductive cycle in the Bogotá highland plateau. Future studies should further examine these aspects to assess the possibilities for expansion of P. clamator in the Bogotá highland plateau.


RESUMEN El búho rayado (Pseudoscops clamator) tiene amplia distribución geográfica, y a pesar de ello la información sobre su biología reproductiva es dispersa. En este estudio presentamos el primer registro de nido de P. clamator para Colombia. Brindamos datos sobre su anidación y reproducción, basados en observaciones de un nido encontrado en una plantación de Eucalyptus globulus entre abril y mayo de 2013 en Cajicá, Cundinamarca, Colombia. El nido encontrado sobre el suelo es similar a otros previamente descritos en Argentina, Brasil y Surinam, con una nidada de dos individuos, donde sólo sobrevivió un polluelo que dejó el nido luego de 25 a 30 días de nacido. Encontramos en la dieta del búho, curíes (Cavia aperea) y paloma sabanera (Zenaida auriculaya). Poco se conoce sobre otras especies que son depredadas por el búho rayado o si esta especie presenta más de un ciclo reproductivo al año en la Sabana de Bogotá. Estos aspectos deben ser examinados en futuros estudios para evaluar las posibilidades de expansión de P. clamator en la Sabana de Bogotá.

2.
Int. j. morphol ; 28(2): 627-636, June 2010. ilus
Article in English | LILACS | ID: lil-577164

ABSTRACT

The barn-owl (Tyto Alba) and striped-owl (Rhinoptynx clamator) belong respectively to the families Tytonidae and Strigidae. Avian paramyxoviruses have been isolated from a variety of species of wild and domestic birds wordlwide causing diverse clinical symptoms and signs. Paramyxoviruses belong to the family Paramyxoviridae and Avulovirus genus, including nine serotypes (APMV 1 to 9). The lymphoid leukosis is a retrovirus-induced neoplasia. The avian retroviruses belong to the Retroviridae family and to the Alpharetrovirus genus. Coronaviruses can cause respiratory and enteric disease in several species of birds. They belong to the Coronaviridae family and to the groups 3a e 3c. In this study, we describe the presence of viruses in four owls, two barn owls (Tyto alba) and two striped owls (Rhinoptynx clamator), rescued from tree-lined streets of Sao Paulo, Brazil and sent to the Recovery Center of Wild Animals of the Tietê Ecological Park, where the animals died. Fragments of lung, liver and small intestine of these birds were processed for transmission electron microscopy utilizing negative staining (rapid preparation), immunoelectron microscopy and immunocitochemistry techniques. Under the transmission electron microscopy paramyxovirus particles, pleomorphic, roughly spherical or filamentous, measuring 100 to 500 nm of diameter containing an envelope covered by spikes, an herring-bone helical nucleocapsid-like structure, measuring 15 to 20 nm in diameter, were visualized in the samples of lung, liver and small intestine of all owls. In small intestine samples of the two striped-owl (owls 3 and 4) it was detected pleomorphic coronavirus particles with a diameter of 75-160 nm containing a solar corona-shaped envelope, with projections of approximately 20 nm of diameter. In liver fragments of one striped-owl (owl 4) pleomorphic particles of retrovirus with a diameter of 80-145 nm containing an envelope with short projections and diameter of 9 nm were....


La lechuza (Tyto Alba) y el búho de orejas (Rhinoptynx clamator) pertenecen respectivamente a las familias Strigidae y Tytonidae. El paramixovirus aviario se ha aislado de especies de vida silveste como las aves domésticas por todo el mundo, causando diversos síntomas clínicos. El paramixovirus pertenece a la familia Paramyxoviridae y al Avulovirus genus que incluye nueve serotipos (APMV 1 a 9). La leucosis linfoide es una neoplasia inducida por retrovirus. Los retrovirus aviarios pertenecen a la familia Retroviridae y el género Alpharetrovirus. Los coronavirus pueden causar enfermedades respiratorias y entéricas en varias especies de aves. Ellos pertenecen a la familia Coronaviridae y a los grupos 3a y 3c. En este estudio, se describe la presencia del virus en cuatro búhos, dos lechuzas (Tyto alba) y dos búhos de orejas (Rhinoptynx clamator), rescatados de las calles arboladas de São Paulo, Brasil y enviados al Centro de Recuperación de Animales Silvestres del Parque Ecológico de Tietê, donde hubo murieron los animales. Fragmentos de pulmón, delhígado y del intestino delgado de estas aves fueron procesados para microscopía electrónica de transmisión utilizando tinción negativa (preparación rápida), inmunomicroscopía y técnicas de inmunocitoquímica. Bajo microscopía electrónica de transmisión, partículas de paramixovirus, pleomórficas, aproximadamente esféricas o filamentosas, de 100 a 500 nm de diámetro con un sobre cubierto por espigas, y nucleocápside helicoidal con características de espiga, midiendo 15 a 20 nm de diámetro, fueron visualizadas en las muestras de pulmón, hígado e intestino delgado de todos los búhos. En muestras de intestino delgado de dos búho de orejas (búhos 3 y 4) se detectaron partículas pleomórficas con coronavirus de un diámetro de 75-160 nm con un sobre con forma de corona solar, con proyecciones de aproximadamente 20 nm de diámetro. En el hígado de un búho de orejas (búho 4) se observaron partículas pleomórficas de retrovirus con ...


Subject(s)
Animals , Strigiformes/anatomy & histology , Strigiformes/virology , RNA Viruses/immunology , RNA Viruses/ultrastructure , Brazil , Coronavirus/immunology , Coronavirus/ultrastructure , Immunohistochemistry , Microscopy, Electron, Transmission , Paramyxoviridae/immunology , Paramyxoviridae/ultrastructure , Retroviridae/immunology , Retroviridae/ultrastructure
3.
Article in English | LILACS | ID: lil-468022

ABSTRACT

I observed, and documented in detail, Ferruginous Pygmy Owl (Glaucidium brasilianum) predation on a mobbing Fork-tailed Flycatcher (Tyrannus savanna) in south-east Brazil. Events described in this account are supported with original photos. In addition to the predation event, I list 12 mobbing bird species that were alarmed by the presence of this raptor in the study area, including Trochilidae (Eupetomena macroura), Formicariidae (Formicivora rufa), Tyrannidae (Camptostoma obsoletum, Elaenia cristata, E. flavogaster, E. chiriquensis, T. savana, Myiarchus tyrannulus), Turdidae (Turdus leucomelas, T. amaurochalinus, T. rufiventris) and Emberizidae (Coryphospingus cucullatus). The Fork-tailed Flycatcher may represent 35-76.8 percent of the pygmy-owl body mass (41-80 g), which supports early reports about the predation on relatively large prey by this owl species. Although most authors have suggested that mobbing birds are subject to a low predation risk, this report and others confirmed that these events are not negligible and can be deadly dangerous to the mobbers, and conversely profitable to the raptor.


Um evento de predação da tesoura Tyrannus savana (Aves: Tyrannidae) que apresentava comportamento de tumulto frente ao Caburé Glaucidium brasilianum (Aves: Strigidae) no sudeste brasileiro é descrito em detalhe. São incluídas fotografias do evento e uma lista de 12 espécies de aves que exibiram este comportamento frente ao caburé, abrangendo Trochilidae (Eupetomena macroura), Formicariidae (Formicivora rufa), Tyrannidae (Camptostoma obsoletum, Elaenia cristata, E. flavogaster, E. chiriquensis, T. savana, Myiarchus tyrannulus), Turdidae (Turdus leucomelas, T. amaurochalinus, T. rufiventris) and Emberizidae (Coryphospingus cucullatus). A ave predada pode representar uma grande parte (35-76,8 por cento) da massa corporal desse caburé (41-80 g), confirmando outros relatos na literatura sobre o consumo de presas de tamanho considerável relativamente a essa espécie de Strigiformes. Embora a maioria dos autores em geral subestime o risco de predação das aves participantes de tumultos, este e outros relatos espalhados pela literatura demonstram que tais eventos não são tão insignificantes e podem ser fatais para as aves, além de proveitosos para o predador.


Subject(s)
Birds/anatomy & histology , Birds/classification , Birds/growth & development , Behavior, Animal , Hunting/analysis , Hunting/classification , Behavior/classification
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