Results 21 to 30 of about 2,047,095 (269)

The diversity and evolution of electric organs in Neotropical knifefishes

open access: yesEvoDevo, 2022
The Gymnotiformes, also known as the South American or Neotropical knifefishes, include the strongly electric Electrophorus electricus and many other weakly electric species.
Isabelle E. Bray   +2 more
doaj   +1 more source

First record of Gymnotus henni (Albert, Crampton and Maldonado, 2003) in Panama: phylogenetic position and electric signal characterization [PDF]

open access: yesCheck List, 2013
We present the first record of the weakly electric fish Gymnotus henni in Panama, which also represents the first record of Gymnotus in the Pacific slope of the country. One specimen was collected in a tributary of the Chucunaque River in the Tuira basin.
Fernando Alda   +6 more
doaj   +3 more sources

Electric organ discharge patterns during group hunting by a mormyrid fish [PDF]

open access: yesProceedings of the Royal Society B: Biological Sciences, 2005
Bruce Carlson, Matthew E Arnegard
exaly   +2 more sources

Flight-associated discharge pattern in a weakly electric fish, Gnathonemus petersii (Mormyridae, Teleostei) [PDF]

open access: yes, 1976
A Gnathonemus petersii which is put into the tank of a Mortnyrtts rume, or of an electrically silenced G. petersii, displays a discharge rate which is only one fourth (8 Hz) the rate exhibited by an attacking, territory-defending animal.
Kramer, Bernd
core   +1 more source

The energetics of electric organ discharge generation in gymnotiform weakly electric fish [PDF]

open access: yesJournal of Experimental Biology, 2013
SummaryGymnotiform weakly electric fish produce an electric signal to sense their environment and communicate with conspecifics. Although the generation of such relatively large electric signals over an entire lifetime is expected to be energetically costly, supporting evidence to date is equivocal.
Vielka L, Salazar   +2 more
openaire   +2 more sources

Intra- versus inter-sexual selection in the dimorphic electric organ discharges of the snoutfish Marcusenius altisambesi (Mormyriformes, Teleostei) [PDF]

open access: yes, 2010
Marcusenius pongolensis (South Africa) and M. altisambesi (Upper Zambezi/Okavango) differ in the sex difference of their electric organ discharges (EODs). It is permanent and graded in the former and seasonally dimorphic in the latter.
Kramer, Bernd   +2 more
core   +1 more source

Partial Discharge Behaviour within Two Spherical Cavities in a Dielectric Material [PDF]

open access: yes, 2011
In high voltage insulation systems, a typical defect that exists is a void cavity. It is known that voids are a common source of partial discharge (PD) activity within an insulation system.
Illias, H A, Lewin, P L, Chen, G
core   +2 more sources

Waveform Discrimination in the Electric Fish Eigenmannia: Sensitivity for the Phase Differences Between the Spectral Components of a Stimulus Wave [PDF]

open access: yes, 1991
Eigenmannia lineata is a tropical South American gymnotiform fish that is both electrogenic and electroreceptive. Its electric organ generates a constant-frequency wave discharge (EOD) that is sexually dimorphic in waveform and harmonic content ...
Kramer, Bernd   +3 more
core   +1 more source

Development of an integrated low-power RF partial discharge detector [PDF]

open access: yes, 2009
This paper presents the results from integrating a low-power partial discharge detector with a wireless sensor node designed for operating as part of an IEEE 802.15.4 sensor network, and applying an on-line classifier capable of classifying partial ...
Stephen, B.   +7 more
core   +4 more sources

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