Navigation Links
Elephantnose fish 'see' with their chin
Date:8/21/2007

Originating in Central Africa, Peters' elephantnose fish (Gnathonemus petersii), finds its bearings by means of weak electrical fields. Scientists from the University of Bonn have now been able to show how well this works. In complete darkness the animals can even distinguish the material of objects at a distance or dead organisms from living ones. The results have now been published in the Journal of Experimental Biology.

The fish, which is as long as a cigar, hovers with its head inclined, close to the gravel-covered bed. While it swims forward slowly, its trunk-like elongated chin sweeps steadily from right to left, always at a distance of a few millimetres from the bottom. This way the fish behaves like treasure hunters searching for buried gold coins on the beach with their metal detector. Basically, this is precisely what the fish is doing. Hidden in the sediment there are large numbers of dead nematocera larvae waiting for it, its favourite food.

Zoologists from the University of Bonn have hidden the larvae there. 'We wanted to see whether it can find them and if the answer is yes, then down to what depth,' Professor Gerhard von der Emde explains. 'It', that is the African Peters' elephantnose fish. Yet its characteristically shaped chin does not work like a particularly sensitive nose. Instead, it contains more than 500 electric sensors with which it senses its surroundings. With this sense the animal has conquered the night. During the day it hides, only under cover of darkness does it goes searching for food.

The chin of Peters' elephantnose fish is basically its eye. In its tail is the corresponding torch. Via mutated muscle cells it produces regular electrical pulses of a few volts with it. 80 times per second the fish switches this little battery on and off for the blink of an eye. 'At the same time it measures the electrical field which builds up around it via sensors in the skin,' explains Professor von der Emde. Nearby
'/>"/>

Contact: Professor Gerhard von der Emde
onderemde@uni-bonn.de
49-022-873-5555
University of Bonn
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Scientists seek answers on what activates deadly anthrax spores
2. Antibiotic Resistant Bacterium Uses Sonar-like Strategy to “See?Enemies or Prey
3. UCLA scientists transform HIV into cancer-seeking missile
4. New insight into people who see colors in letters and numbers
5. Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin
6. Artifical cornea lets woman blind 20 years see
7. What the eye doesnt see
8. Researchers seek to discover what really happens when a virus enters the body
9. Newly recognized gene mutation may reduce seeds, resurrect plants
10. Higher risk for cervical cancer seen among women infected with multiple HPV types
11. Hide and seek: Researchers discover a new way for infectious bacteria to enter cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... from Ume University, Sweden, have explored two different ... reaction sequence leading to the formation of oxygen ... published in the scientific journal Nature Communications ... present day synthetic catalysts for water oxidation, which ... for the direct storage of solar energy in ...
(Date:7/11/2014)... that under the normal circumstances, astrocytes participate ... neuronal environment, and exhibit therapeutic and repairing ... Previous studies have found that nerve cells ... induction have reduced viability, which produces influences ... Yuan, Kailuan General Hospital, Hebei United University, ...
(Date:7/10/2014)... other major cities in New Mexico, nearly every public ... rather than precious potable water supplies. Across the U.S. ... golf courses receive treated effluent. Reusing the effluent increases ... courses and homeowners alike fertilize their lawns during the ... A New Mexico State University turfgrass expert has a ...
Breaking Biology News(10 mins):Molecular snapshots of oxygen formation in photosynthesis 2'Tailored' water -- the latest in lawn care 2
... have designed a nanoscale system to observe and ... By combining microfabricated cantilevers and magnetic ... study showed that cells respond to outside forces ... and their environment. The study also revealed that ...
... by the Health Department shed new light on the health ... responded to the World Trade Center disaster on September 11, ... Registry, show that 3.6% of the 25,000 rescue and recovery ... at the site. That rate is 12 times what would ...
... and their collaborators will make it much easier to ... papers are published in Nature Biotechnology on 8th and ... biological information and the use of public data repositories ... is vital to allow full integration, exchange and comparison ...
Cached Biology News:Bioengineers at University of Pennsylvania devise nanoscale system to measure cellular forces 2Survey finds elevated rates of new asthma among WTC rescue and recovery workers 2Survey finds elevated rates of new asthma among WTC rescue and recovery workers 3Minimum information standards -- all for 1 and 1 for all 2Minimum information standards -- all for 1 and 1 for all 3
(Date:7/10/2014)... Unraveling life’s mysteries can intrigue, amaze, ... Family purchased a DNA test to unravel ... with a lifetime of memories, sharing, and closeness. In ... DNA genuinely brought the family closer together. , ... genetic history and prior to taking the genetic ...
(Date:7/10/2014)... Senior supply chain management executives from over 50 ... of “Reducing Cost, Lead Time, & Defects in the ... the partnership of the Bio Supply Management Alliance ( ... SCMI) of the University of San Diego in ... Institute of Peace and Justice in San Diego, Devendra ...
(Date:7/10/2014)... , July 10, 2014 /PRNewswire-iReach/ -- ... and interpretation, today announced an agreement with ... analytics for Lineagen,s NextStep Dx PLUS.  ... neurodevelopmental and neurological disorders, currently offers FirstStep ... (CMA) testing service used by healthcare providers ...
(Date:7/10/2014)... Adelaide research may help in the fight against terrorism ... tiny quantities of explosives with the use of light ... Sensors and Actuators B: Chemical , the researchers ... explosives in concentrations as low as 6.3 ppm (parts ... a few minutes. , "Traditionally explosives detection has involved ...
Breaking Biology Technology:Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4Detecting trace amounts of explosives with light 2
... among the oldest known life-forms, but they are not ... these single-celled microorganisms were designated as a domain of ... Robert Gunsalus, a UCLA professor of ... Archaea because of their ability to thrive ...
... By applying a coating to individual silicon nanowires, researchers ... efficiency and sensitivity. The findings, published in the ... suggest that the coated wires hold promise for photodetectors ... to a large surface-to-volume ratio, nanowires typically suffer from ...
... Netherlands, July 6, 2011 , ... biotechnology company,focusing on development and marketing of gene ... that it,has signed a Research Agreement with Johnson ... N.V. (Janssen).  Under the agreement Skyline,using its proprietary ...
Cached Biology Technology:Old life capable of revealing new tricks after all 2Old life capable of revealing new tricks after all 3With a simple coating, nanowires show a dramatic increase in efficiency and sensitivity 2Skyline Diagnostics Establishes Research Collaboration With Janssen 2
MOUSE ANTI SIMIAN VIRUS 5 Immunogen: Simian virus 5...
... Dog Serum-Mixed Breed • Dog serum is collected ... one year of age Available Anticoagulants: ... (Na) N-06: K2EDTA N-08: ... N-03: Alsevers N-05: ACD ...
Ready-to-use; 40mg/ml X-Gal and 32mg/ml IPTG...
Whole blood is collected from canines (any breed, either sex), refrigerated within 6 hours, processed within 24 hours and frozen at -20C....
Biology Products: