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Journal of Experimental Biology 113,143-150 (1984)
Published by Company of Biologists 1984

Water Flow Patterns During Prey Capture by Teleost Fishes

GEORGE V. LAUDER 1 and BRIAN D. CLARK 1

1 Department of Anatomy, University of Chicago, 1025 East 57 th St, Chicago, Illinois 60637, U.S.A.

Water flow into the mouth cavity during suction feeding in centrarchid sunfishes was studied by mapping the trajectories of small particles in the water during prey capture. In Lepomis, a circulation develops as the mouth opens, and water is drawn into the mouth from above, below and in front of the head. Water displaced by movement of the body as the prey is approached during the strike is entrained into the circulation towards the mouth. The parcel of water sucked into the mouth has a diameter approximately one-tenth that of the predator's length.

Key words: Water flow, feeding, fishes

Accepted on May 8, 1984




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© The Company of Biologists Ltd 1984