J R Soc Interface. 2005 Sep 22;2(4):389-91.

Water-escape velocities in jumping blacktip sharks.

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Zoological Institute, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland. juerg@gluecklich.net

Abstract

This paper describes the first determination of water-escape velocities in free-ranging sharks. Two approximations are used to estimate the final swimming speed at the moment of penetrating the water surface. Blacktip sharks were videotaped from below the surface and parameters were estimated by analysing the sequences frame by frame. Water-escape velocities averaged 6.3 ms(-1). These velocities for blacktip sharks seem accurate and are similar to estimates obtained for other shark species of similar size.

PMID:: 16849197; [PubMed - indexed for MEDLINE]
PMCID:: PMC1578268

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