Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"optomotor"”.
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Sublethal Effects of Pesticides on Visually-Guided Bee Behaviours
… flow stimulates an innate response known as the optomotor response, which enables the bees to orient and maintain a straight course during flight. The persistent use of pesticides in seed treatments and bees’ exposure negatively impact honeybee’s ability to engage in these ecologically relevant …
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Spectral and ocellar inputs to honeybee motion-sensitive descending neurons
Optomotor reflexes have been observed in many insects and in some cases the neural pathways that mediate these reflexes have been identified physiologically and anatomically. In honeybees Kaiser (1975) established that the spectral sensitivity of optomotor responses in bees almost exactly matched …
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Spectral and ocellar inputs to honeybee motion-sensitive descending neurons
Optomotor reflexes have been observed in many insects and in some cases the neural pathways that mediate these reflexes have been identified physiologically and anatomically. In honeybees Kaiser (1975) established that the spectral sensitivity of optomotor responses in bees almost exactly matched …
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The Effects of Forebrain Ablations on Some Behaviors in <i>Xenopus Laevis</i>
… to an acoustic-vibratory stimulus</p> <p>2. The optomotor response</p> <p>3. Escape from shallow water</p> <p>4. Feeding behavior</p> <p>In the habituation experiment no changes were found in the number of responses oer session, the strength of the .responses or in the strength of the initial …
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Genetic Intervention in Sensory Systems of a Fly
… Daraus folgt auch, daß in der Strukturmutante optomotor blind das Fehlen der VS Zellen nicht ursächlich für die stark eingeschränkten Reaktionen auf vertikale Bewegung ist. Ein anderer Defekt in optomotor blind muß dafür verantwortlich sein. Die Arbeit zeigt das große Potential der …
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Spatial, temporal and spectral properties of photoreceptor cells in the fiddler crab Uca pugilator (Bosc, 1802)
… on the vertical axes and posses excellent optomotor stabilization mechanism. Such understanding of their retinal design has helped us realize that the eyes of fiddler crabs are adapted for specific visual tasks in their geometrically structured habitat. However, the physiological …
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Behavioral Measures and Ecological Correlates of Vision in Poeciliid Fishes
… has historically been overlooked. I used an optomotor assay to measure the behavioral responses of eight individual P. reticulata (N = 4 males; 4 females) to rotating achromatic stimuli. Unsurprisingly, I found that P. reticulata are better able to perceive stimuli as they increase in …
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OMB and ORG-1
… mainly focused on two Drosophila T-box genes, optomotor-blind (omb) and optomotor-blind related 1 (org-1), and included (i) a genetic analysis of org-1 and (ii) the identification of molecular determinants within OMB and ORG-1 that confer functional specificity. (i) Genetic analysis of org-1 …
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Host-seeking behaviour in the malaria vector Anopheles Gambiae
… may represent an alternative strategy to optomotor-guided anemotaxis in very low-light levels. When presented with black and clear targets in a flow of host odour-laden air, mosquitoes closely approached both targets more frequently than in a flow of clean air. Black targets were …
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Descending premotor target tracking systems in flying insects
… architecture in which target tracking and optomotor stabilization pathways operate in parallel during pursuit.
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Using new tools to study the neural mechanisms of sensation: Auditory processing in locusts and translational motion vision in flies
… motion but is not involved in the rotational optomotor response. Using calcium imaging, I found that LPC1 was selectively excited by back-to-front motion on the eye ipsilateral to the neuron population and inhibited by front-to-back motion on the contralateral eye, demonstrating a simple …
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The role of Decapentaplegic (Dpp) in Drosophila wing development
… mediated by the Dpp target gene, T-box protein Optomotor-blind (Omb), is required in A cells, but not in P cells, to maintain the normal position of the A/P boundary. During patterning formation, it is essential for cells to receive precise positional information to pattern the tissue. It has …
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"Bruchpilot" -molecular and functional characterization of a novel active zone protein at the Drosophila synapse
… downregulation also shows severely impaired optomotor behaviour. Finally, at an ultrastructural level BRP downregulation seems to impair the formation of the characteristic T-shaped synaptic ribbons at the active zones without significantly altering the overall synaptic architecture (in …