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Mitogenomics of Central American weakly-electric fishes
Gene, 2019Electric fishes are a diverse group of freshwater organisms with the ability to generate electric organ discharges (EODs) that are used for communication and electrolocation. This group (ca. 200 species) has originated in South America, and six species colonized the Central American Isthmus.
Celestino Aguilar +4 more
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Oxygen consumption in weakly electric Neotropical fishes
Oecologia, 2003Weakly electric gymnotiform fishes with wave-type electric organ discharge (EOD) are less hypoxia-tolerant and are less likely to be found in hypoxic habitats than weakly electric gymnotiforms with pulse-type EOD, suggesting that differences in metabolism resulting from EOD type affects habitat choice.
David, Julian +3 more
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Peripheral electrosensory imaging by weakly electric fish
Journal of Comparative Physiology A, 2006Different species have developed different solutions to the problem of constructing a representation of the environment from sensory images projected onto sensory surfaces. Comprehension of how these images are formed is an essential first step in understanding the representation of external reality by a given sensory system. Modeling of the electrical
A A, Caputi, R, Budelli
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The bioinspiring potential of weakly electric fish
Bioinspiration & Biomimetics, 2017Electric fish are privileged animals for bio-inspiring man-built autonomous systems since they have a multimodal sense that allows underwater navigation, object classification and intraspecific communication. Although there are taxon dependent variations adapted to different environments, this multimodal system can be schematically described as having ...
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Cyclic AMP modulates electrical signaling in a weakly electric fish
Journal of Comparative Physiology A, 2003Many species of electric fish show diurnal or socially elicited variation in electric organ discharge amplitude. In Sternopygus macrurus, activation of protein kinase A by 8-bromo-cAMP increases electrocyte sodium current magnitude. To determine whether the behavioral plasticity in electric organ discharge amplitude is controlled by electrocyte ...
L, McAnelly, A, Silva, H H, Zakon
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The electric field of a weakly electric fish
1994Freshwater fish of the genus Apteronotus (family Gymnotidae) generate a weak, high frequency electric field (< 100 mV/cm, 0.5-10 kHz) which permeates their local environment. These nocturnal fish are acutely sensitive to perturbations in their electric field caused by other electric fish, and nearby objects whose impedance is different from the ...
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Active electrolocation of objects in weakly electric fish
Journal of Experimental Biology, 1999ABSTRACT Weakly electric fish produce electric signals (electric organ discharges, EODs) with a specialised electric organ creating an electric field around their body. Objects within this field alter the EOD-induced current at epidermal electroreceptor organs, which are distributed over almost the entire body surface.
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Cutaneous electrical oscillation in a weakly electric fish, Gymnarchus niloticus
Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 2001An African electric fish, Gymnarchus niloticus. ceases its electric organ discharge for a prolonged time in response to external electrical signals. During the cessation of electric organ discharges from the electric organ, a weak sinusoidal signal (approximately 0.1 mV cm(-1)) near the fish's previous discharge frequency was recorded near the body ...
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A Finite Element Method of Electric Image in Weakly Electric Fish
2012Weakly electric fish can generate an electric field with their electric organ (EO). Through 14,000 electroreceptors distributed on their skin, they can sense the electric field perturbation induced by a nearby prey or object. Many researchers have studied to reveal the mechanism of electrolocalization.
Sejoon Ahn, DaeEun Kim
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Neural maps in the electrosensory system of weakly electric fish
Current Opinion in Neurobiology, 2014The active electrosense of weakly electric fish is evolutionarily and developmentally related to passive electrosensation and the lateral line system. It shows the most highly differentiated topographic maps of the receptor array of all these senses.
Rüdiger, Krahe, Leonard, Maler
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