Energy expenditure of freely swimming adult green turtles (Chelonia mydas) and its link with body acceleration

Author:

Enstipp Manfred R.12,Ciccione Stéphane3,Gineste Benoit12,Milbergue Myriam12,Ballorain Katia12,Ropert-Coudert Yan12,Kato Akiko12,Plot Virginie12,Georges Jean-Yves12

Affiliation:

1. Université de Strasbourg, IPHC, 23 rue Becquerel, 67087 Strasbourg, France

2. CNRS, UMR7178, 67037 Strasbourg, France

3. Kélonia, l'observatoire des tortues marines, BP 40, 97436 Saint Leu, La Réunion, France

Abstract

SUMMARYMarine turtles are globally threatened. Crucial for the conservation of these large ectotherms is a detailed knowledge of their energy relationships, especially their at-sea metabolic rates, which will ultimately define population structure and size. Measuring metabolic rates in free-ranging aquatic animals, however, remains a challenge. Hence, it is not surprising that for most marine turtle species we know little about the energetic requirements of adults at sea. Recently, accelerometry has emerged as a promising tool for estimating activity-specific metabolic rates of animals in the field. Accelerometry allows quantification of the movement of animals (ODBA/PDBA, overall/partial dynamic body acceleration), which, after calibration, might serve as a proxy for metabolic rate. We measured oxygen consumption rates () of adult green turtles (Chelonia mydas; 142.1±26.9 kg) at rest and when swimming within a 13 m-long swim channel, using flow-through respirometry. We investigated the effect of water temperature (Tw) on turtle and tested the hypothesis that turtle body acceleration can be used as a proxy for . Mean mass-specific () of six turtles when resting at a Tw of 25.8±1.0°C was 0.50±0.09 ml min–1 kg–0.83. increased significantly with Tw and activity level. Changes in were paralleled by changes in respiratory frequency (fR). Deploying bi-axial accelerometers in conjunction with respirometry, we found a significant positive relationship between and PDBA that was modified by Tw. The resulting predictive equation was highly significant (r2=0.83, P<0.0001) and associated error estimates were small (mean algebraic error 3.3%), indicating that body acceleration is a good predictor of in green turtles. Our results suggest that accelerometry is a suitable method to investigate marine turtle energetics at sea.

Publisher

The Company of Biologists

Subject

Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics

Reference49 articles.

1. Ballorain K. (2010). Trophic ecology of green turtles Chelonia mydas in algae patches and seagrass meadows of the south-western Indian Ocean. PhD thesis, University of La Réunion, Reunion Island, France.

2. Habitat use of a multispecific seagrass meadow by green turtles Chelonia mydas at Mayotte Island;Ballorain;Mar. Biol.,2010

3. Exercise warms adult leatherback turtles;Bostrom;Comp. Biochem. Physiol.,2007

4. Behaviour and physiology: the thermal strategy of leatherback turtles;Bostrom;PLoS ONE,2011

5. Mayotte Island: another important green turtle nesting site in the southwest Indian Ocean;Bourjea;Endang. Species. Res.,2007

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