The implications of lung-regulated buoyancy control for dive depth and duration Hays, Graeme C., Metcalfe, Julian D. and Walne, Anthony W. 2004, The implications of lung-regulated buoyancy control for dive depth and duration, Ecology, vol. 85, no. 4, pp. 1137-1145, doi: 10.1890/03-0251. Attached Files Name Description MIMEType Size Downloads hays-implicationsof-2004.pdf Published version application/pdf 358.06KB 348 Title The implications of lung-regulated buoyancy control for dive depth and duration Author(s) Hays, Graeme C. orcid.org/0000-0002-3314-8189 Metcalfe, Julian D. Walne, Anthony W. Journal name Ecology Volume number 85 Issue number 4 Start page 1137 End page 1145 Total pages 9 Publisher Ecological Society of America Place of publication Ithaca, N.Y. Publication date 2004-04 ISSN 0012-9658 1939-9170 Keyword(s) Ascension Island bird buoyancy control Chelonia mydas depth selection diving green turtle mammal penguin pinniped seal Summary Among air-breathing divers, control of buoyancy through lung volume regulation may be most highly developed in marine turtles. In short, the turtle lung may serve a dual role as both an oxygen store and in buoyancy control. A simple model is developed to show that, for turtles diving up to the maximum depth at which they can still use their lungs to attain neutral buoyancy, the total oxygen store will increase greatly with dive depth, and hence a corresponding increase in dive duration is predicted. Time–depth recorders attached to free-living green turtles (Chelonia mydas) at Ascension Island confirmed a marked increase in dive duration with depth, with the gradient of this relationship being >10 times that seen in diving birds and mammals. Consistent with the prediction that the lungs serve a dual role, we found that, when lead weights were added to some turtles to increase their specific gravity, the mean depth of dives decreased, but for dives to the same depth, weighted animals dived for longer. The depth distribution of green turtles seems to be generally constrained by the maximum depth at which they can still attain close to neutral buoyancy. Language eng DOI 10.1890/03-0251 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 ©2004, Ecological Society of America Free to Read? Yes Persistent URL http://hdl.handle.net/10536/DRO/DU:30058219 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Life and Environmental Sciences Open Access Collection Centre for Integrative Ecology Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au. Versions Version Filter Type Mon, 25 Nov 2013, 13:30:33 EST Tue, 26 Nov 2013, 08:28:07 EST Wed, 05 Feb 2014, 15:03:57 EST Fri, 09 May 2014, 15:03:16 EST Fri, 13 Jun 2014, 18:57:39 EST Tue, 05 Dec 2017, 12:44:23 EST Fri, 07 Sep 2018, 16:46:07 EST Filtered Full Citation counts:   Cited 72 times in TR Web of Science Cited 73 times in Scopus Search Google Scholar Access Statistics: 577 Abstract Views, 348 File Downloads  -  Detailed Statistics Created: Mon, 25 Nov 2013, 13:30:33 EST