In the lab, the fish raised in water with traces of the drug distanced themselves from other perch, became less fearful, and acted more adventurously, willing to leave safe refuges, the scientists said.
Last week Ikea withdrew a batch of frozen meatballs from sale in the food section of stores in the UK, and other European countries, after tests in the Czech Republic found traces of horsemeat in those products.
They even exhumed the bodies of flu victims buried in the permanently frozen ground of the Norwegian island of Spitzbergen, in the hope that traces of virus genetic material might have been preserved.
In testimony Tuesday, FBI forensic chemist Kelly Mount told the jury that clothing found in the travel bag of defendant Mohamed Sadeek Odeh, accused in the bombing in Kenya, contained traces of explosive material.
For anyone seeking to understand the origins of Gore's political personality, routinely characterized as stiff and oddly formal, there are clues to be found in the direct line that traces back through the family to their political hero, Cordell Hull.
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Ikea has withdrawn a batch of frozen meatballs from sale in the food section of stores in the UK, and other European countries, after tests in the Czech Republic found traces of horsemeat.
On Monday, Swedish company Ikea withdrew meatballs from sale in 14 European countries after tests in the Czech Republic found traces of horsemeat in a batch made in Sweden.
But a recent study of pasteurised whole milk in shops by researchers at Marshfield Clinic Laboratories in Wisconsin found traces of the bug in 2.8% of the samples.
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Since the first horsemeat was discovered in frozen meals and burgers in the UK and Ireland in January, traces have been found in meat products across Europe.
General Barbero has worked hard with other federal agencies to curb the availability of ammonium-nitrate fertilizers made in Pakistan, since traces of the agricultural chemical have shown up repeatedly in the aftermath of Taliban bombings.
Fife Council leader Alex Rowley said there was "no risk" of school meals in the region containing traces of horsemeat, while Tayside Contracts, which caters for schools across Dundee, Angus and Perth and Kinross, said there was "no evidence" to suggest its meals contained horsemeat.
The shards are present only in traces, but indicate the eruption spewed ash much further than previously thought - about twice the distance recorded in other studies.
The 5th Royal Irish Lancers was formed in 1858 and first fought in a major conflict in the Boer War in 1899, as well as action in the First World War, although traces its origins to an Irish dragoons regiment dating back to 1689.
In The Prize, which won the Pulitzer Prize for nonfiction in 1992, Dan provides a comprehensive history of oil that traces the development of the industry from its beginnings in the 19th century when it began producing kerosene for lamps to the oil crisis of the 1970s, through to the Gulf War.
The faint traces of concrete foundations in the earth are a poignant reminder of the town that has been lost.
America's state governors launched a bipartisan effort to remove a provision in a congressional bill that would give the presidency more power in domestic crises over the National Guard , which traces its history back to the colonial militias.
The large shadow of Leibniz in this story traces to his convictions about the breadth with which his binary system could be applied.
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"If Bulgaria did not have enough arguments to announce yesterday that the traces in this attack lead to Hezbollah's military wing, we would not have done it, " Nikolay Mladenov told a TV station.
Though in recent decades the final traces of the grand old days of mahogany dining cars and dinner-jacketed waiters serving up turtle soup have vanished, the line still makes for an adventure worthy of any Grand Tour, particularly with your own diminutive passengers in tow.
Now, on to part two: 9to5 Mac seems to have unearthed traces in the iOS 4.3 beta of a new feature called "Photo Streams" that seems to be -- you guessed it -- a way to share continuous streams of photos with friends you approve, presumably through MobileMe (which would fit in nicely with the Find my Friends stuff).
In proving that the earth takes a regular beating from space rocks he opened the way for others, in 1980, to find traces of the meteorite that killed the dinosaurs.
Fellow former child actor Seth Green discussed the issue of privacy in a recent "WTF with Marc Maron" podcast and said he traces the interest to the rise in the tabloid culture over the past few years that has people enthralled with the lives of celebrities.
The Czech Republic's state veterinary administration said it found traces of horsemeat in the Ikea product as part of its testing programme.
The discovery of horsemeat traces in some beefburgers, which food standards authorities in the Irish Republic say they believe came from Poland.
When Danish cyclist Knud Enemark Jensen died at the 1960 Olympics in Rome, his autopsy revealed traces of amphetamine, and the following outcry led to drug testing being adopted by the world cycling and football federations -- as well as the International Olympic Committee in time for Mexico '68.
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Soon after being contacted by Mr Ontko, French police were able to confirm that DNA traces found in the dormitory of the hostel in Pleine Fougeres and from a sample taken from Montes in Miami matched.
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London School of Economics scholar Dick Hobbs, who grew in a hardscabble section of east London, traces yobism in large part to the decline of blue-collar opportunities throughout Britain.
Horsemeat was first found in meals and burgers in the UK and Ireland last month, and traces have since been found in meat products across Europe.
Humans are not adapted to these natural chemicals, in which the margin of safety is about tenfold compared with traces in synthetic pesticides (some 10, 000-fold higher).
Its last eruption was in 1994, and traces of the black lava can still be seen.
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