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Page last updated at 07:59 GMT, Friday, 2 October 2009 08:59 UK

How do you train a fish?

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Researchers at the Marine Biological Laboratory (MBL) in Woods Hole, Massachusetts, have trained fish to respond to sound.

Just as 19th Century scientist Ivan Pavlov conditioned dogs to associate the sound of a bell with the prospect of food, these black sea bass associate a 280Hz tone emitted from an underwater speaker with food, and respond by gathering in a partitioned "feeding zone".

Scientific aquaculture programme director Scott Lindell, who is running these experiments, believes that "acoustic ranching" could benefit fish farming.

Read more: Pavlov's fish

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