Barn Owl
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Estudo anatômico dos tratos e aptérios torácicos e abdominais em Suindara (Tyto alba, Scopoli 1769). / Anatomical study of thoracic and abdominal tracts and apteria in barn owl (Tyto alba, Scopoli 1769).
Com o objetivo de estudar descritiva e topograficamente os tratos e aptérios, torácicos e abdominais, em Suindara (Tyto alba, Scopoli 1769), foram utilizadas 15 aves adultas (06 machos e 09 fêmeas), pesando em média 430 g, doadas por óbito pela Superintendência do Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais IBAMA em Pernambuco. As ave
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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2. Small mammals in the diet of barn owls, Tyto alba (Aves: Strigiformes) along the mid-Araguaia river in central Brazil
We collected and analyzed 286 Barn owl, Tyto alba (Scopoli, 1769), pellets from two nests in different environments along the mid-Araguaia River in central Brazil. Our analyses revealed that these owls feed mainly on small mammals, especially rodents. Owls from the riverbanks at Fazenda Santa Fé had a more diverse diet, preying mainly on rodents that typica
Zoologia (Curitiba). Publicado em: 2011-12
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3. Caracterização histoquímica e imunoistoquímica de áreas telencefálicas da coruja-da-igreja (Tyto alba) / Histochemical and immunohistochemical characterization of forebrain areas in the barn owl (Tyto alba)
Owls possess exceptional visual and auditory capacities. There is only limited information about the neuroanatomy of their forebrain. Thus, we characterized by histo/immunohistochemical techniques the forebrain of the barn owl. The basal ganglia were delineated by their intense immunostaining for DARPP-32 and tyrosine hydroxylase. Primary thalamorecipient se
Publicado em: 2010
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4. Dieta de Tyto Alba (aves; strigiformes) em Ãreas urbana e rural de Pernambuco / Dieta de Tyto Alba (aves; strigiformes) em Ãreas urbana e rural de Pernambuco
We studied the variation in the diet of Tyto alba (Scopoli, 1769) (Strigiformes, Tytonidae) through the analysis 647 pellets contents collected from July 2006 to August 2008 in an urban and rural area in Pernambuco, Brazil. We identified 833 prey items of 16 species. Small mammals were the main prey of barn owls (93,3%) followed by invertebrates (3,2%), rept
Publicado em: 2009
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5. Predation of small mammals by the barn owl (Tyto alba) and its role in the control of hantavirus natural reservoirs in a periurban area in the municipality of Uberlândia, Minas Gerais, Brazil / Predação de pequenos mamíferos por suindara (Tyto alba) e seu papel no controle de reservatórios naturais de hantavírus em uma área periurbana do município de Uberlândia, Minas Gerais, Brasil
Small mammals, especially rodents, are the main prey of the barn owl and its diet is considered an accurated reflex of the local fauna composition and populational flutuations. The principal objectives of this study were to inventory the species of small mammals in the outskirts of the Municipality of Uberlândia, MG, based on the analysis of regurgitated pe
Publicado em: 2006
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6. Early blindness results in a degraded auditory map of space in the optic tectum of the barn owl.
The optic tectum of the barn owl (Tyto alba) contains a neural map of auditory space consisting of neurons that are sharply tuned for sound source location and organized precisely according to their spatial tuning. The importance of vision for the development of this auditory map was investigated by comparing space maps measured in normal owls with those mea
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7. Rodents in open space adjust their behavioral response to the different risk levels during barn-owl attack
BioMed Central.
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8. Axonal delay lines for time measurement in the owl's brainstem.
Interaural time difference is an important cue for sound localization. In the barn owl (Tyto alba) neuronal sensitivity to this disparity originates in the brainstem nucleus laminaris. Afferents from the ipsilateral and contralateral magnocellular cochlear nuclei enter the nucleus laminaris through its dorsal and ventral surfaces, respectively, and interdigi
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9. Auditory Responses in the Barn Owl's Nucleus Laminaris to Clicks: Impulse Response and Signal Analysis of Neurophonic Potential
We used acoustic clicks to study the impulse response of the neurophonic potential in the barn owl's nucleus laminaris. Clicks evoked a complex oscillatory neural response with a component that reflected the best frequency measured with tonal stimuli. The envelope of this component was obtained from the analytic signal created using the Hilbert transform. Th
American Physiological Society.
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10. How the owl resolves auditory coding ambiguity
The barn owl (Tyto alba) uses interaural time difference (ITD) cues to localize sounds in the horizontal plane. Low-order binaural auditory neurons with sharp frequency tuning act as narrow-band coincidence detectors; such neurons respond equally well to sounds with a particular ITD and its phase equivalents and are said to be phase ambiguous. Higher-order n
The National Academy of Sciences.
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11. Neural map of interaural phase difference in the owl's brainstem.
Neurons of the barn owl's (Tyto alba) nucleus laminaris, the first site of binaural convergence, respond in a phase-locked fashion to a tone delivered to either ear. It may take longer to elicit phase-locked spikes from one ear than from the other. This disparity in delay differs from neuron to neuron and is independent of tonal frequency. In binaural stimul
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12. How do owls localize interaurally phase-ambiguous signals?
Owls and other animals, including humans, use the difference in arrival time of sounds between the ears to determine the direction of a sound source in the horizontal plane. When an interaural time difference (ITD) is conveyed by a narrowband signal such as a tone, human beings may fail to derive the direction represented by that ITD. This is because they ca
The National Academy of Sciences.