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 12 of 12 for “"weakly electric fish"”.
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Multisensory integration in weakly electric fish
… were studied. The first category of stimulus is electrical signals with frequencies below 50 Hz that are encoded in the activity of ampullary receptors. The second category is amplitude modulations of the electric organ discharge, which are encoded by p-type tuberous receptors. Six multisensory …
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Electrosensory-based Search Strategies In Weakly Electric Fish
… context, personality traits and natural ecology. Weakly electric fish rely specifically on a short-range electric sense to search and locate objects in their environment in low-light conditions. However, little is known about the exploratory strategies used. We characterized the exploratory …
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Adaptive radiation and speciation in African weakly-electric fish
… drivers of evolutionary diversification. African weakly-electric fishes (Teleostei, Mormyridae) have undergone an outstanding adaptive radiation, putatively owing to their ability to communicate through species-specific Electric Organ Discharges (EODs) produced by a novel, muscle-derived electric …
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Adaptive radiation, speciation, and reproductive isolation in African weakly electric fish : (Genus Campylomormyrus, Mormyridae, Teleostei)
… is to better understand the relevance of weak electricity in the adaptive radiation of the African mormyrid fish. The chosen model taxon, the genus Campylomormyrus, exhibits a wide diversity of electric organ discharge (EOD) waveform types. Their EOD is age, sex, and species specific and is an …
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The Computational Neuroethology of Weakly Electric Fish: Body Modeling, Motion Analysis, and Sensory Signal Estimation
… I present research on sensory acquisition in weakly electric fish of the genus Apteronotus, where I overcame the first barrier by developing a markerless tracking system and have deployed a computational approach toward overcoming the second barrier. This approach allows estimation of the full …
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The role of electronsensory signals on the locomotor performance of the weakly electric fish apteronotus albifrons
… in a wide range of contexts. In schooling fish, coordinated movement is based on visual or mechanical cues and signals. In contrast, most gymnotiforms and mormyriforms are nocturnal or live in dark waters and use electric signals for social communication. However, the effect of conspecific …
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Maze Learning and Recall in Weakly Electric Fish, Mormyrus rume proboscirostris Boulenger 1898 (Teleostei, Mormyridae): Sensory Bases
… or dead reckoning is far from settled. Nocturnal weakly electric fish (family Mormyridae) leave their daytime hiding places at night to forage for food and return at dawn. Thus, these fish provide an excellent model to explore their navigational strategies.</p> <p>The present studies explore these …
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System identification and modeling of primary electrosensory afferent response dynamics in the weakly electric fish Apteronotus leptorhynchus
… processing in the electrosensory system of weakly electric fish involves the encoding of changes in transdermal potential into trains of action potentials in primary afferent nerve fibers. Using amplitude modulations (AMs) of the electric organ discharge (EOD), we systematically studied the …
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High-resolution source imaging with bio-inspired sensing systems
… predators, or navigate. For example, blind cave fish use their lateral lines to swim in dark water by sensing flows, weakly electric fish generate an electric field to detect electric distortions caused by nearby objects, and bats emit ultrasound and listen to echoes to capture insects. It is …
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Models and analysis of a stochastic neural source coder
… (from P-type electrosensory afferents of weakly electric fish). We also take a close look at the growth in variance of inter-spike intervals (ISIs) and the deviation of the stochastic source-coding neuron from an ideal DC-block system with infinite memory. The stochastic source-coding …
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Active Pre-Touch Sensing: From Biology to Neuromorphic Biomimetic Artifacts
… than vision. By measuring mutual capacitance, electric field pre-touch sensors can detect local objects if their dielectric properties differ from that of air. When the actively emitted electric field by such a device is measured at multiple positions, spatial modulation patterns can provide …
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Processing Submillisecond Timing Differences in a Model Electrosensory System
… processing in a time coding expert, mormyrid weakly electric fish, which can detect submillisecond differences in the duration of electric signals.</p><p>First, I measured responses of peripheral receptors to stimuli of different durations. I found that each unit responded preferentially to …