WordNet
n. a measure undertaken by a corporation to discourage unwanted takeover attempts [syn: porcupine provision]
Wikipedia
A shark repellent is any method of driving sharks away from an area. Shark repellents are a category of animal repellents. Shark repellent technologies include magnetic shark repellent, electropositive shark repellents, electrical repellents, and semiochemicals.
Shark repellents can be used to protect people from sharks by driving the sharks away from areas where they are likely to kill human beings. In other applications, they can be used to keep sharks away from areas they may be a danger to themselves due to human activity. In this case, the shark repellent serves as a shark conservation method.
There is evidence that surfactants such as sodium lauryl sulfate can act as a shark repellent at concentrations on the order of 100 parts per million. However, this does not meet the desired "cloud" deterrence level of 0.1 parts per million.
Research indicates that sharks will avoid an area when they smell chemical released by dead and dying sharks. Six chemicals were synthesized from shark glands and tissues and used in experiments. Sharks immediately reacted once they detected these chemicals. To quote a 2004 Associated Press article, "Fisherman and scientists have long noted sharks stay away if they smell a dead shark."
The scientists behind these advances are Eric Stroud and Patrick Rice .
Usage examples of "shark repellent".
The shark repellent, and the shark tranquilizers, and the vulture repellent, and the space horse calving-stimulator, and all the rest of the things we’.
When he had tossed the shark repellent packets into the water, Jake felt better.
He stuck two sticks of shark repellent into his weighted belt, double-checked his wrist compass, working out the realignment of vectors now that Alix's small boat had drifted a bit.
I could start swimming nearer the surface and wait till the chopper sighted me and then I could put out a cloud with the shark repellent and dive and leave it for them as a decoy while I tried to get clear, or I could go straight down to a hundred feet where they couldn't see me and swim face-up with the sun as a bearing and try to hit the island before narcosis reduced me to a drifting piece of flotsam and the air in the tanks ran out.
People have been trying to find an effective shark repellent for over two thousand years.
He found some shark repellent and he sprinkled it right out into the water.
He then took out the shark repellent packet, prayed that all the studies he'd heard on its effectiveness were true, and broke it open.
Lobo made herself stop kicking, stop slapping the water, and grab for her shark repellent instead.