Electroreception in the Turkistan catfish

Brown, H. R.; Andrianov, G.N.; Mamadaliev, A. M.

doi:10.1007/bf01951892

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…An induced electrical field (iE) is the more likely potential stimulus for fish in the vicinity of an HK project with well-shielded electrical components, but an iE may be not be detected in the same way as electrical currents passing directly through the water between electrodes. Nonetheless, Brown et al (1984) demonstrated stimulation of electroreceptors in Turkistan catfish (Glyptosternum reticulatum) from both DC currents and movement of a permanent bar magnet (creating an iE field) over the fish. The channel catfish in our experiments may have sensed the iE produced by their swimming through the static magnetic field and simply not have reacted to the stimulus by changing their activity level or distribution relative to the magnet.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Laboratory Studies of the Effects of Static and Variable Magnetic Fields on Freshwater Fish

Cada¹,

Bevelhimer²,

Fortner³

et al. 2012

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Laboratory Studies of the Effects of Static and Variable Magnetic Fields on Freshwater Fish

Cada¹,

Bevelhimer²,

Fortner³

et al. 2012

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Behavioral Responses of Representative Freshwater Fish Species to Electromagnetic Fields

et al. 2013

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Hydrokinetic energy is proposed as an environmentally preferred means of generating electricity from river and tidal currents. To resolve environmental concerns, it is important to investigate potential effects on aquatic organisms from the electromagnetic fields (EMFs) that are created by underwater generators and transmission cables. We evaluated the behavioral responses of some representative freshwater fishes to static and variable EMFs in a series of laboratory experiments. Fish were exposed for 46 h to a static (DC) EMF with a permanent bar magnet or to a variable (AC) EMF with an electromagnet. Fish locations were recorded with a digital imaging system, and changes in activity level and distribution relative to the magnet position were quantified at 5‐min intervals. Experiments with Fathead Minnow Pimephales promelas, Redear Sunfish Lepomis microlophus, Striped Bass Morone saxatilis, Lake Sturgeon Acipenser fulvescens, and Channel Catfish Ictalurus punctatus produced mixed results. Except for Fathead Minnow, there was no effect on fish activity level. Only Redear Sunfish and Channel Catfish exhibited a change in distribution relative to the position of the magnet, with both species showing an apparent attraction to the EMF source. In a separate experiment, rapid behavioral responses of Paddlefish Polyodon spathula and Lake Sturgeon to the onset of an AC field were recorded with high‐speed video. Paddlefish did not react to a variable, 60‐Hz magnetic field (i.e., like that emitted by an AC generator or cable), but Lake Sturgeon consistently responded with a variety of altered swimming behaviors. These results will be useful for positioning cables or generators to minimize interactions with EMF‐sensitive species.

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On the electrodetection threshold of aquatic vertebrates with ampullary or mucous gland electroreceptor organs

2007

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Reinterpretation of research on the electric sense in aquatic organisms with ampullary organs results in the following conclusions. The detection limit of limnic vertebrates with ampullary organs is 1 microV cm(-1), and of marine fish is 20 nV cm(-1). Angular movements are essential for stimulation of the ampullary system in uniform d.c. fields. Angular movements in the geomagnetic field also generate induction voltages, which exceed the 20 nV cm(-1) limit in marine fish. As a result, marine electrosensitive fish are sensitive to motion in the geomagnetic field, whereas limnic fish are not. Angular swimming movements generate a.c. stimuli, which act like the noise in a stochastic resonance system, and result in a detection threshold in marine organisms as low as 1 nV cm(-1). Fish in the benthic space are exposed to stronger electric stimuli than fish in the pelagic space. Benthic fish scan the orientation plane for the maximum potential difference with their raster of electroreceptor organs, in order to locate bioelectric prey. This behaviour explains why the detection threshold does not depend on fish size. Pelagic marine fish are mainly exposed to electric fields caused by movements in the geomagnetic field. The straight orientation courses found in certain shark species might indicate that the electric sense functions as a simple bisensor system. Symmetrical stimulation of the sensory raster would provide an easy way to keep a straight course with respect to a far-field stimulus. The same neural mechanism would be effective in the location of a bioelectric prey generating a near-field stimulus. The response criteria in conditioning experiments and in experiments with spontaneous reactions are discussed.

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Electroreception in the Turkistan catfish

Cited by 3 publications

References 4 publications

Laboratory Studies of the Effects of Static and Variable Magnetic Fields on Freshwater Fish

Laboratory Studies of the Effects of Static and Variable Magnetic Fields on Freshwater Fish

Behavioral Responses of Representative Freshwater Fish Species to Electromagnetic Fields

On the electrodetection threshold of aquatic vertebrates with ampullary or mucous gland electroreceptor organs

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