Flipper beat frequency and amplitude changes in diving green turtles, Chelonia mydas

Hays, Graeme C., Marshall, Greg J. and Seminoff, Jeff A. 2007, Flipper beat frequency and amplitude changes in diving green turtles, Chelonia mydas, Marine biology, vol. 150, no. 5, pp. 1003-1009, doi: 10.1007/s00227-006-0412-3.

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Title Flipper beat frequency and amplitude changes in diving green turtles, Chelonia mydas
Author(s) Hays, Graeme C.ORCID iD for Hays, Graeme C. orcid.org/0000-0002-3314-8189
Marshall, Greg J.
Seminoff, Jeff A.
Journal name Marine biology
Volume number 150
Issue number 5
Start page 1003
End page 1009
Total pages 7
Publisher Springer
Place of publication Berlin, Germany
Publication date 2007-02
ISSN 0025-3162
Summary Using a turtle-borne camera system, changing flipper beat frequency and amplitude were measured in five diving green turtles (Chelonia mydas Linnaeus 1758) in the Bahía de los Angeles, Mexico (28°58′N, 113°33′W). These observations were made between June and August 2002. Turtles worked hardest (i.e., had the highest flipper beat frequency and amplitude) at the start of descents when positive buoyancy is predicted to oppose their forward motion. During the later part of descents, turtles worked less hard in line with opposing buoyancy forces being reduced. For example, flipper beat frequency declined from about 60–80 beats min−1 at the start of descent to around 25–40 beats min−1 after 30 s of the descent. At the start of ascents the flipper beat frequency was around 30 beats min−1, lower than on descent, and declined as the ascent progressed with often passive gliding for the final few meters to the surface. This pattern of effort during diving appears to apply across a range of marine reptiles, birds and mammals suggesting that graded effort during descent and ascent is an optimum solution to minimising the cost of transport during diving.
Language eng
DOI 10.1007/s00227-006-0412-3
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30058357

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