Results 131 to 140 of about 709 (151)

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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Spermatic cell characteristics in Gymnotiformes (Teleostei: Ostariophysi) and their phylogenetic meaning

Journal of Fish Biology, 2009
Spermatic characteristics were studied in representatives of the families Rhamphichthyidae, Sternopygidae and Apteronotidae, and compared with pre‐existent data from Gymnotidae and Hypopomidae. The spermatic characteristics found in Gymnotiformes were also compared with data from other Ostariophysi spermatic cells.
Franca, G. F., Oliveira, C., Quagio-Grassiotto, I.   +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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Neurogenesis, cell death and regeneration in the adult gymnotiform brain

Journal of Experimental Biology, 1999
ABSTRACT Gymnotiform fish, like all teleosts examined thus far, are distinguished by their enormous potential for the production of new neurons in the adult brain. In Apteronotus leptorhynchus, on average 105 cells, corresponding to approximately 0.2 % of the total population of cells in the adult brain, are in S-phase within any period ...
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Catecholaminergic systems in the brain of a gymnotiform teleost fish: An immunohistochemical study

Journal of Comparative Neurology, 1990
AbstractThe localization of catecholamines (CA) in the brain of Apteronotus leptorhynchus was studied with immunohistochemical techniques using antibodies to the enzymes tyrosine hydroxylase (TH), dopamine B‐hydroxylase (DBH), phenylethanolamine‐N‐methyltransferase (PNMT), and the neurotransmitter dopamine (DA).
E, Sas, L, Maler, B, Tinner
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Neural circuitry for communication and jamming avoidance in gymnotiform electric fish

Journal of Experimental Biology, 1999
ABSTRACT Over the past decade, research on the neural basis of communication and jamming avoidance in gymnotiform electric fish has concentrated on comparative studies of the premotor control of these behaviors, on the sensory processing of communication signals and on their control through the endocrine system, and tackled the question ...
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Gymnotiform fish: an important component of Amazonian fioodplain fish communities

Journal of Fish Biology, 1996
Estimates of the density, biomass and species diversity of fish from floating meadow and flooded forest habitats suggest that gymnotiform fish constitute an important component of Amazonian flood plain fish faunas. Electric eels, Electrophorus electricus are unexpectedly abundant within Varzea forest.
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Checklist of Gymnotiformes (Osteichthyes: Ostariophysi) and catalogue of primary types

Neotropical Ichthyology, 2017
Carl J Ferraris, CARLOS David De Santana, Richard P Vari   +2 more
exaly  

The Active Electric Sense of Pulse Gymnotiformes

2020
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Model-based total evidence phylogeny of Neotropical electric knifefishes (Teleostei, Gymnotiformes)

Molecular Phylogenetics and Evolution, 2016
VÍCTOR A Tagliacollo, Maxwell J Bernt, Jack M Craig   +2 more
exaly