dilution effect

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In antipredator behaviour, crowding together into a dense group in order to reduce the chance of any particular individual being attacked by a predator. For example, if a predator takes ten prey a day, an individual in a group of 100 stands a 10 per cent chance of being attacked, but if the group contains 1000 individuals the risk is only 1 per cent.

Subjects: Ecology and Conservation.

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