Results 221 to 230 of about 3,600 (245)

Gymnotiformes Berg 1940

2019
Gymnotiformes Gymnotidae Gymnotus carapo Linnaeus Pomphorhynchus ...
Hernández-Orts, Jesús S., Kuchta, Roman, Semenas, Liliana, Crespo, Enrique A., González, Raúl A., Aznar, Francisco J.   +5 more
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Hydrodynamic optimality of balistiform and gymnotiform locomotion

European Journal of Computational Mechanics, 2017
Some groups of fish have evolved to generate propulsion using undulatory elongated fins while maintaining a relatively rigid body.
Brennan Sprinkle, Rahul Bale, Amneet Pal Singh Bhalla, Malcolm A. MacIver, Neelesh A. Patankar   +4 more
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Biogeography and Breeding in Gymnotiformes from Uruguay

Environmental Biology of Fishes, 2003
This study was carried out in Uruguay (30–35°S), South America, with two complementary approaches. First, an extensive exploration of Uruguayan freshwaters allowed us to assess the distribution of the two major species of Gymnotiformes (out of 4) across sites.
Ana Silva, Laura Quintana, Matías Galeano, Pablo Errandonea   +3 more
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Electric organ discharges of the gymnotiform fishes: III. Brachyhypopomus

Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 1999
We measured and mapped the electric fields produced by three species of neotropical electric fish of the genus Brachyhypopomus (Gymnotiformes, Rham phichthyoidea, Hypopomidae), formerly Hypopomus. These species produce biphasic pulsed discharges from myogenic electric organs. Spatio-temporal false-color maps of the electric organ discharges measured on
P K, Stoddard, B, Rasnow, C, Assad
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Ontogeny and evolution of electric organs in gymnotiform fish

Journal of Physiology-Paris, 2008
In order to further our understanding of the evolution of electric organs in the Neotropical gymnotiform fish, we studied the ontogeny of the electric organs in eight species. In Eigenmannia virescens, Sternopygus macrurus, and Apteronotus leptorhynchus the earliest electrocytes are located between muscle fibres of the hypaxial muscle (Type A ...
F, Kirschbaum, H O, Schwassmann
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Modular Design of Gymnotiform Undulating Fin

2019
In the field of underwater robot, gymnotiform undulating fin inspired a number of research group over the world. A variety of design has been consequently created and developed with the design of multi-actuators. However, this type of design has the remarkable downsides.
Van Dong Nguyen, Canh An Tien Pham, Van Hien Nguyen, Thien Phuc Tran, Tan Tien Nguyen   +4 more
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Spinal Abnormalities in a Specimen of the Panamanian Knifefish Apteronotus rostratus (Apteronotidae: Gymnotiformes) with Comments on Gymnotiform Locomotion

Copeia, 2018
Skeletal deformities among fishes are well documented in the aquaculture industry and husbandry studies. However, these deformities are noticeably less prevalent among wild caught animals, likely due to their deleterious effects on the fitness of affected individuals particularly at earlier life-history stages. Here we use micro-CT imaging to describe,
Kory M. Evans, Andrew M. Savage, James S. Albert   +2 more
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Robotic device shows lack of momentum enhancement for gymnotiform swimmers

Bioinspiration & Biomimetics, 2019
Many fish generate thrust by undulating one or multiple elongated fins while keeping their body straight. This propulsion mechanism has stimulated interest in both biology and bio-inspired marine propulsion because its maneuverability and efficiency at low speed.
Ian English, Hanlin Liu, Oscar M Curet
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Bioecology of Electric Fish (Actinopterygii: Gymnotiformes)

Middle East Research Journal of Biological Sciences
The poraquê has an elongated and cylindrical body, with just one anal fin, which extends across almost the entire abdomen it resembles the shape of an eel. Its head is flat and its mouth is equipped with a row of sharp, conical teeth. The color of this animal is always very dark, but the ventral part of the body is yellowish and they have poor vision ...
Carlos Henrique Marchiori, Marco Vinícios de Oliveira Santana, Klebert de Paula Malheiros   +2 more
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The electric organ discharges of the gymnotiform fishes: II. Eigenmannia

Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 1998
We present detailed measurements of the electric organ discharge of the weakly electric fish, Eigenmannia sp. These maps illuminate, with high resolution in both space and time, the electric organ discharge potential and electric field patterns in the water about the fish and on the skin surface itself.
C, Assad, B, Rasnow, P K, Stoddard, J M, Bower   +3 more
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