Gymnotiform fish
WebRepresentations of the three-dimensional dipole-like electric-organ discharge (EOD)-associated electric field in gymnotiform electric fish. (a) Field of Eigenmannia virescens showing the difference in geometry of the current lines ( ) and the lines of isopotential ( ) at (b) peak ( ) of the positive phase head-to-tail recorded EOD waveform. WebFIGURE 41.12. Neural representations of sinusoidal stimulus modulations caused by interference from a neighboring fish’s EOD in the wave-type gymnotiform Eigenmannia.The top row shows Lissajous plots that illustrate the temporal relationship between amplitude modulation and phase modulation, with the sense of rotation …
Gymnotiform fish
Did you know?
Webgymnotiform to be ellipsoidal with a maximum range of approximately 1 m. Because the magnitude of the electric field decreases with the inverse cube of distance, one predicts that electric fish should be distance-limited by the cost of signal production. For a fish to double its active space will require an eightfoldincrease in the amplitude WebI am still publishing on Neotropical Gymnotiform electric fish, following a position as a Postdoctoral Researcher in Montevideo, Uruguay. My focus in there is to improve my computational ...
Fish swim by exerting force against the surrounding water. There are exceptions, but this is normally achieved by the fish contracting muscles on either side of its body in order to generate waves of flexion that travel the length of the body from nose to tail, generally getting larger as they go along. The vector forces exerted on the water by such motion cancel out laterally, but generate … WebThe EODs of most gymnotiform fish resemble either continuous sine waves or discrete sinusoidal pulses separated by silent intervals. Whereas a continuous sine or cosine wave ( figure 3a ) has all its energy concentrated at a single frequency, the single-period sine pulse ( figure 3b ) and the single-period cosine pulse ( figure 3c ) have broad ...
WebThe best frequencies for gymnotiform and catfish ampullary receptors are about 30 Hz and 8 Hz (refs 16, 18) respectively, whereas the spectral peaks of gymnotiform EODs are generally much higher ... The Gymnotiformes /dʒɪmˈnɒtɪfɔːrmiːz/ are an order of teleost bony fishes commonly known as Neotropical knifefish or South American knifefish. They have long bodies and swim using undulations of their elongated anal fin. Found almost exclusively in fresh water (the only exceptions are species … See more Anatomy and locomotion Aside from the electric eel (Electrophorus electricus), Gymnotiformes are slender fish with narrow bodies and tapering tails, hence the common name of "knifefishes". They have neither See more There are currently about 250 valid gymnotiform species in 34 genera and five families, with many additional species yet to be formally described See more Gymnotiform fishes inhabit freshwater rivers and streams throughout the humid Neotropics, ranging from southern Mexico to northern See more • Electric fish • Gymnarchus, the African knife-fish (Mormyroidea) See more Most gymnotiforms are weakly electric, capable of active electrolocation but not of delivering shocks. The electric eels, genus Electrophorus, are strongly electric, and are not closely related to the Anguilliformes, the true eels. Their relationships were analysed by … See more Gymnotiformes are among the more derived members of Ostariophysi, a lineage of primary freshwater fishes. The only known See more • Photos of various gymnotiforms See more
WebOct 1, 2024 · Gymnotiformes are a renowned group of Neotropical freshwater fish due to their ability to produce and detect electric organ discharges used for …
WebPhysiologically identified primary electroreceptive afferents in the gymnotiform fish, Eigenmannia, were labelled by intracellular injection of horseradish peroxidase (HRP) in order to determine their termination sites in the posterior lateral line lobe (PLLL). SummaryPhysiologically identified primary electroreceptive afferents in the gymnotiform … difference between atenolol \u0026 metoprololWebThe dorsal, anal, pectoral, and pelvic fins of most fishes are only used to assist in propulsion and adjust posture; on the other hand, the MPF mode fish, which accounts for about 15% of the... forgery is the illegal altering of a documentWebGymnotiform fishes of South America produce rhythmic electric organ discharges (EODs) and can detect these fields with a specialized cutaneous electrosensory system ( Zupanc and Bullock, 2005 ). forgery in south africaWebGymnotiform fish lack dorsal and pelvic fins entirely, ... Because of this, they only hunt smaller fish that they are able to swallow whole. 5. They are able to explore their surroundings without seeing them. By generating … forgery financial instrument texasWebEtimologia. Chiloconger prové del mot grec cheilos (llavi) i de la paraula llatina conger (congre).. Descripció. Cos moderadament allargat i amb l'extrem de la cua rom i endurit. Aleta caudal reduïda. L'aleta dorsal comença sobre la part posterior de les pectorals. Els radis de les aletes dorsal i anal no presenten segments. Musell curt i rom. Ulls grans (el … forgery lawphilWebMay 15, 1999 · For example, some gymnotiform fish appear to be impedance-matched to the resistivity of the water; others modulate the amplitude of their discharge seasonally and diurnally. The fact that electric signals do not propagate, but exist as electrostatic fields, means that, unlike sound signals, electric organ discharges produce no echoes or ... forgery in the second degree orsWebIn the present investigation, we employed monoclonal antibodies against ryanodine-binding proteins of avian muscle cells to the brain of weakly electric gymnotiform fish. Immunoprecipitation and Western blot analysis revealed two isoforms in the fish brain, with molecular weights comparable to those of avian and fish muscle ryanodine-binding ... forgery in the second degree