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An electric eel shocks its prey like a Taser

It can make its prey twitch so it can eat it.

Vanderbilt University / YouTube

ELECTRIC EELS, THE Amazonian fish that can deliver shocks powerful enough to knock down a horse, has a shock system similar to a taser.

That is the finding of a nine-month study into just how the fish are able to shock.

The research was conducted by Professor of Biological Sciences Kenneth Catania at Vanderbilt University in Tennessee and is described in the article “The shocking predatory strike of the electric eel” published in the 5 December issue of the journal Science.

People have known about electric fish for a long time. The ancient Egyptians used an electric marine ray to treat epilepsy. Michael Faraday used eels to investigate the nature of electricity and eel anatomy helped inspire Volta to create the first battery. Biologists have determined that a six-foot electric eel can generate about 600 volts of electricity – five times that of a US electrical outlet.

shutterstock_185284526 Shutterstock / Cuson Shutterstock / Cuson / Cuson

Until now, however, no one had figured out how the eel’s electroshock system actually worked.

In order to do so, Catania equipped a large aquarium with a system that can detect the eel’s electric signals and obtained several eels, ranging up to four feet in length.

As he began observing the eels’ behavior, the biologist discovered that their movements are incredibly fast.

They can strike and swallow a worm or small fish in about a tenth of a second. So Catania rigged up a high-speed video system that ran at a thousand frames per second so he could study the eel’s actions in slow motion.

“It’s amazing. The eel can totally inactivate its prey in just three milliseconds. The fish are completely paralysed,” said Catania.

“I have some friends in law enforcement, so I was familiar with how a Taser works,” said Catania. “And I was struck by the similarity between the eel’s volley and a Taser discharge. A Taser delivers 19 high-voltage pulses per second while the electric eel produces 400 pulses per second.

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    Mute Glen
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    Mar 4th 2015, 6:21 AM

    He needs to be replaced with a judge who will refuse to use the words “suspended sentence” and learn the words “life imprisonment”.
    Same goes for his liberal colleagues.

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    Mute Hermes
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    Mar 4th 2015, 9:52 AM

    H.S.B.C. 350 ?

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    Mute Ben Redline
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    Mar 4th 2015, 12:37 PM

    I agree the Wayne O’Donoghue case was a particularly lenient sentence for a child killer – especially considering his actions after he killed young Robert. However Wayne seems to be enjoying his new life now in the UK so that’s a happy ending (not).

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    Mute Paul Roche
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    Sep 24th 2015, 10:24 PM

    “Carney’s decision in 2006 to hand Wayne O’Donoghue a four-year sentence for killing his 11-year-old neighbour Robert Holohan was upheld by the Court of Criminal Appeal following an appeal for ‘undue leniency’ from the DPP.
    In its 33-page judgement, the three-judge court said Carney’s ruling had been the correct one.
    Prior to imposing that sentence, following a verdict of manslaughter, the judge had warned the victim’s mother to prepare herself – saying the sentence he would be imposing would be upsetting for her, before explaining the reasoning behind his decision.”

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    Mute Francid Dooley
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    Mar 4th 2015, 7:13 AM

    Judges need to be re educated. And get with the real word. From their privileged position and privileged past.they seem to live in a different world then the rest of us .

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    Mute Paul Roche
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    Mar 4th 2015, 9:04 AM

    Judges also need to be replaced from time to time. There’s still no sign that an apolitical appointments process has been put in place.

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    Mute Paul Roche
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    Sep 24th 2015, 9:59 PM

    “Ken Murphy, Director General of the Law Society of Ireland, said he was “one of Ireland’s’ greatest ever criminal judges”.
    “He did society’s dirty work,” Murphy added.”

    For 24 Years!
    Despite my original comment above, I wholeheartedly agree with Ken Murphy.

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    Mute Stephen Duggan
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    Mar 4th 2015, 6:50 AM

    IMO, he was as inept as a one legged man in an ass kicking contest. The entire judicial system in this country needs to be overhauled and brought into the 21st century. I know some of this may need referendums, well if that’s the case do it, stop putting the criminal first and the victim second.

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    Mute Steve McMahon
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    Mar 4th 2015, 7:25 AM

    A judge that would jail the person for not paying their bills but suspended sentence for the real criminals

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    Mute John R
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    Mar 4th 2015, 8:05 AM

    The article focussed on the issues of controversy in the long career of a man who dealt with some of the worst crimes in the history of the State and with a cohort of vicious criminals. It did not focus on the many routine decisions made by the Judge. Any Judge dealing with the complex criminal cases this man dealt will inevitably attract criticism. Strangely the article focuses on appeals where his sentences were increased and not on the cases where his sentences were actually reduced on appeal; a source of public complaint by this Judge and a reason, ironically, why some of his sentences were subsequently perceived as lenient by the Appeals Court. This is how our judicial system works in common law countries with Appeal Courts often establishing the guidelines for sentencing. There is too much ignorant populist commentary on the Journal about Judges from people who clearly haven’t a clue how any judicial system works and don’t actually have any facts beyond newspaper headlines at their disposal. This man dealt with cases and sat though evidence which would most of us in prolonged psychotherapy. He deserves praise and not the ignorant criticism he is attracting from “the usual suspects”.

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    Mute mammysdinners
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    Mar 4th 2015, 8:43 AM

    Agreed, to dedicate his working life to considering the details of the most savage acts to be committed in the state is indeed to do the state a great service. He could have simply lined his pockets and become a developer. Hope he enjoys his retirement.

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    Mute Mike Brennan
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    Mar 4th 2015, 11:18 AM

    Very well said.

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    Mute leslie skinner
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    Mar 4th 2015, 7:04 AM

    He should take the judge, that sent the woman by taxi, from Donegal to Mountjoy, for not having a TV licence, with him.

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    Mute Harold
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    Mar 4th 2015, 7:21 AM

    The judge had nothing to do with the taxi

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    Mute Hermes
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    Mar 4th 2015, 9:54 AM

    The judge should be informed enough to know that it would happen – that is the point !
    Wasting tax-payers money while feeding from the same pot and all that !
    Judges will become figures of ridicule when certain insider information is revealed within the coming weeks !

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    Mute Peter Nolan
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    Mar 4th 2015, 9:33 AM

    I was actually a juror on a murder trial Justice Carney presided over. He seemed fair and professional. I did, though, love his summing up where, as the defendant scowled in the dock, he reminded us that just because the defendant was an unpleasant, even despicable, person, it was not a basis for conviction of murder.

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    Mute mary carey
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    Sep 24th 2015, 8:08 PM

    Was he found guilty?

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    Mute Alan O'connor
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    Mar 4th 2015, 7:47 AM

    Never knew there were so many legal experts on the Journal. The usual Journal commenters. Opinions on everything and answers to nothing.

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    Mute little jim
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    Mar 4th 2015, 9:49 AM

    I see no answers here either, just your opinion.
    We’re all guilty.

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    Mute Hermes
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    Mar 4th 2015, 9:55 AM

    The ultimate legislators in the State are the citizens – through the ballot – you should understand this Alan !

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    Mute TheDoctor
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    Mar 4th 2015, 10:09 AM

    I’ve an answer. Stop giving out suspended sentences. You don’t need to be a legal expert to read the papers.

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    Mute FlopFlipU
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    Mar 4th 2015, 7:06 AM

    Judging by some of his judgement’s which is difficult to do because there may be thing’s he know’s and we don’t at the time ,he was pretty well off the wall with some of his decisions

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    Mute trickytrixster
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    Mar 4th 2015, 7:06 AM

    Judge fudge

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    Mute John O'Neill
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    Mar 4th 2015, 11:07 AM

    He was complete out of touch with the wishes of the people he was supposed to serve and protect. Good riddance.

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    Mute Chris O Neill Cabra
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    Sep 24th 2015, 8:23 PM

    Off course he made mistakes but thats part of the human condition. Let the man rest in peace.

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    Mute kevin
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    Sep 24th 2015, 8:34 PM

    -When anyone decides upon a career in the legal profession they must accept that in exchange for their 200k + salary and pension , prestige, security , short working hours and long holidays that there are some disadvantages.
    -One such disadvantage is that they may have to listen and make judgement on some horrific cases.
    -Another disadvantage is that they have a huge responsibility to dispense justice.
    -another disadvantage is that they are in the public eye. If they consistently made bad judgements then the public will be outraged.
    -Anther disadvantage is that if their peers and friends try to paint a picture of a great legacy of professionalism then just maybe some of the public will be outraged again.
    -I don’t wish to dance on the man’s grave. If there is a maker up there then i expect he/she is judging him now not just for some good work but also for those outrageous decisions where he allowed rapists to walk free. A purgatorial sentence would be a fair judgement imo with no suspended sentence and no 100 euro bail.

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    Mute Meow
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    Sep 25th 2015, 12:32 AM

    Mistakes that had a huge impact on people (victims and their familys lives.) !

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    Mute Kane Abel
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    Sep 24th 2015, 11:04 PM

    If Wayne O’Donoghue went through a proper justice system with a competent Judge he’d be in a small grey cell somewhere now in my opinion. Carney was born and died an utter idiot, I never read of court proceedings he had a bizarre hand in without feeling shock and dismay – this passing is no loss to Irish Society…..

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    Mute Suzie Sunsine
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    Sep 24th 2015, 11:18 PM

    a three judge court ruled that it was a correct one .

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    Mute Peter Nolan
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    Mar 4th 2015, 9:54 AM

    For those eager to pile on to Carney on the basis of the couple of worst decisions he’s made, this article from a couple of years ago probably gives a better, rounder picture of his achievements and faults over a quarter century on the bench.

    http://www.irishexaminer.com/viewpoints/analysis/grumpy-justice-is-not-blind-to-victims-plight-220770.html

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    Mute john kinsella
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    Mar 4th 2015, 11:45 AM

    A judge is supposed dish out justice every time presides. His bad decisions have ruined lives.

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    Mute Catherine Mill
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    Mar 4th 2015, 9:17 PM

    A judge is simply a banker for the court corporation.

    17
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    Mute Middle Class Cork
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    Sep 24th 2015, 8:54 PM

    He wasn’t exactly a ‘hanging judge’. Let’s hope his replacement has a pair! I note there was no mention of him criticising Joe Duffy when callers to the live line criticised his sentencing of O’Donoghue!

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    Mute Steve McMahon
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    Sep 24th 2015, 11:48 PM

    Good riddance

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    Mute Catherine Mill
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    Mar 4th 2015, 9:21 PM

    http://ancailinrua.com/2013/08/12/a-womans-worth-reporting-and-sentencing-of-violent-crimes-against-women/

    A Woman’s Worth …. reporting and sentencing of violent crimes against women.

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    Mute Kathleen Henderson
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    Sep 29th 2015, 10:12 PM

    Judge Paul Carney RIP was also the Patron of VSAC…..victim support at court. This is an organisation run in the main by volunteers….and these volunteers give support to victims of crime during their time in court. Wonderful organisation much needed and appreciated by Victims of crime.Judge Paul Carney called these volunteers an empathetic benevolent group of people.We were at his funeral Mass today.RIP Judge you’ll be very missed.

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