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Contact: Morgan Kelly
Princeton University


Caption: A simulation of 16 prey was projected (A, green arrow) onto a screen opposite the area from which a bluegill was released. Once the simulation began the individual prey would swim and form groups spontaneously based on three encoded traits -- a tendency to be attracted to, swim in the same direction as, or ignore nearby individuals. The bluegills preceded each attack with a characteristic "hovering" behavior that allowed the researchers to approximate the time the fish took to make a targeting decision before striking (B, inset).

Credit: Courtesy of Science/AAAS

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