Sawfishes stealth revealed using computational fluid dynamics

Title: Sawfishes stealth revealed using computational fluid dynamics
Creator: Bradney, D. R.; Davidson, A.; Evans, S. P.; Wueringer, B. E.; Morgan, D. L.; Clausen, P. D.
Relation: Journal of Fish Biology Vol. 90, Issue 4, p. 1584-1596
Publisher Link: http://dx.doi.org/10.1111/jfb.13255
Publisher: Wiley-Blackwell Publishing
Resource Type: journal article
Date: 2017
Description: Detailed computational fluid dynamics simulations for the rostrum of three species of sawfish (Pristidae) revealed that negligible turbulent flow is generated from all rostra during lateral swipe prey manipulation and swimming. These results suggest that sawfishes are effective stealth hunters that may not be detected by their teleost prey's lateral line sensory system during pursuits. Moreover, during lateral swipes, the rostra were found to induce little velocity into the surrounding fluid. Consistent with previous data of sawfish feeding behaviour, these data indicate that the rostrum is therefore unlikely to be used to stir up the bottom to uncover benthic prey. Whilst swimming with the rostrum inclined at a small angle to the horizontal, the coefficient of drag of the rostrum is relatively low and the coefficient of lift is zero.
Subject: CT scan; elasmobranch; lateral swipe; sawfish rostrum; turbulent flow
Identifier: http://hdl.handle.net/1959.13/1349156
Identifier: uon:30353
Identifier: ISSN:0022-1112
Language: eng
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