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Topic: Electroreception


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In the News (Fri 24 May 19)

  
  The Future of Research on Electroreception and Electrocommunication   (Site not responding. Last check: 2007-10-14)
Among the candidates for future discovery of electroreception, wading birds that probe in the mud are obvious possibilities.
Very telling is the dramatic story of the discovery of electroreception in one subfamily of notopterid teleosts, though absent in its sister subfamily and in other families of the order, Osteoglossiformes (Bullock and Northcutt, 1982).
Once upon a time we dismissed all the smaller invertebrates as unlikely to be electroreceptive because the theory of how fish must do it depended on their size and their high skin resistance.
cogprints.org /106/00/jeb-ms.htm   (2892 words)

  
 Electroreception - Wikipedia, the free encyclopedia
Electroreception, sometimes written as electroception, is the biological ability to receive and make use of electrical impulses.
In the "passive" electroreception, the animal does not generate any electric fields and it senses the electric fields generated in the environment.
A recent study has suggested that the same genes that contribute to a shark's sense of electroreception may also be responsible at least in part to the development of facial structures in humans.
en.wikipedia.org /wiki/Electroreception   (430 words)

  
 Electroreception
While underwater sight and sound -- however muted and distorted they may be -- are within our realm of experience, sharks possess a sense that is so alien to us that we can neither relate to it nor fathom what it might feel like.
That sense is electroreception: an acute sensitivity to electrical fields.
Studies by Adrianus Kalmijn, a pioneer in elasmobranch electroreception, have demonstrated that some sharks -- such as Smooth Dogfish (Mustelus canis) -- are able to detect low frequency (from about 0.5 up to 8 Hertz) electric fields as tiny as 5 nanovolts (billionths of a volt) per square centimetre.
www.elasmo-research.org /education/white_shark/electroreception.htm   (1289 words)

  
 Amazon.com: "active electroreception": Key Phrase page   (Site not responding. Last check: 2007-10-14)
Active electroreception is the subject of chapters by Hopkins (Chapter 10) and Nelson (...
The chapters on how infor- mation is processed in active electroreception (von der Emde and Bell) and mechanoreceptors (Bleckmann and colleagues) demonstrate the remarkable progress that has taken place in this...
With active electroreception, fish emit a weak electrostatic field then sense the distortion of that field caused by nearby objects that differ in...
www.amazon.com /phrase/active-electroreception   (518 words)

  
 Electroreception Research
All living marine organisms generate an electric field around their body and all elasmobranchs possess a sensory system, the Ampullae of Lorenzini (AoL), which enables them to detect these weak electric fields and use them to orient to cryptic prey.
The electroreception research at HIMB focuses on detection of these prey-simulating electric fields in a semi-natural habitat.
A 1m x 1m clear acrylic plate is placed on the bottom of the shark pond and one of four electric dipoles is activated with a weak electric current.
www.hawaii.edu /HIMB/sharklab/research/kajiura.html   (304 words)

  
 Amazon.com: "passive electroreception": Key Phrase page   (Site not responding. Last check: 2007-10-14)
Passive Electroreception in Non-teleost Bony Fishes The majority of the bony fishes are teleosts that have lost electroreception and reinvented it several...
22 Paddlefish and Platypus: Parallel Evolution of Passive Electroreception in a Rostral Bill Organ John D. Pettigrew and Lon Wilkens Abstract A comparison is made between a mammalian,...
In passive electroreception, fish use ampullary electroreceptors in their skin to sense...
www.amazon.com /phrase/passive-electroreception   (556 words)

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