Tyto Alba
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Dieta reprodutiva de Tyto alba (Aves, Tytonidae) no RS, com avaliação da caça oportunista ou seletiva em função da biomassa dos mamíferos
Publicado em: 2007
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14. 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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15. Small mammal vunerability to vertebrate predators in the Ecological Station of Itirapina, SP / "Vulnerabilidade de pequenos mamíferos de áreas abertas a vertebrados predadores na Estação Ecológica de Itirapina, SP."
Estudos sobre seleção de presas podem apresentar resultados bastante diferentes dependendo do predador analisado. Predadores com diferentes técnicas de caça, como as aves de rapina e os mamíferos carnívoros, podem selecionar diferentes tipos de presas. Estudos sistemáticos sobre esse tema ainda são escassos no Brasil. Por esse motivo, o objetivo dest
Publicado em: 2003
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16. 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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17. 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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18. Early visual deprivation results in a degraded motor map in the optic tectum of barn owls.
The optic tectum contains a precise map of orienting movements: the size and direction of movements of the eyes, head, and/or body vary systematically with the locus of neural activation within the tectum. In adult animals, this motor map aligns closely with the tectal map of visual space. This study addressed the question of whether the motor map develops e
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19. 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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20. 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.
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21. 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.