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Accelerometry predicts daily energy ependiture in a bird with high activity levels
H. Elliott K., Le Vaillant M., Kato A., R. Speakman J., Ropert-Coudert Y.
Biology Letters 9, 1 (2013) 20120919 - http://hal.archives-ouvertes.fr/hal-00760692
Sciences du Vivant/Biodiversité/Evolution
Sciences de l'environnement
Accelerometry predicts daily energy ependiture in a bird with high activity levels
Kyle H. Elliott1, Maryline Le Vaillant2, Akiko Kato2, John R. Speakman, Yan Ropert-Coudert2
1 :  Department of Biological Sciences [Winnipeg]
University of Manitoba
General Office 212B Bio-Sci Bldg., 50 Sifton Road Winnipeg, MB R3T 2N2
2 :  DEPE-IPHC - Département Ecologie, Physiologie et Ethologie
CNRS : UMR7178 – Université de Strasbourg
23, rue Becquerel 67087 Strasbourg Cedex 2
Animal ecology is shaped by energy costs, yet it is difficult to measure fine-scale energy expenditure in the wild. Because metabolism is often closely cor-related with mechanical work, accelerometers have the potential to provide detailed information on energy expenditure of wild animals over fine temporal scales. Nonetheless, accelerometry needs to be validated on wild animals, especially across different locomotory modes. We merged data collected on 20 thick-billed murres (Uria lomvia) from miniaturized accelerometers with measurements of daily energy expenditure over 24 h using doubly labelled water. Across three different locomotory modes (swimming, flying and move-ment on land), dynamic body acceleration was a good predictor of daily energy expenditure as measured independently by doubly labelled water (R 2 ¼0.73). The most parsimonious model suggested that different equations were needed to predict energy expenditure from accelerometry for flying than for surface swimming or activity on land (R 2 ¼0.81). Our results demonstrate that acceler-ometers can provide an accurate integrated measure of energy expenditure in wild animals using many different locomotory modes

Biology Letters
Publisher Royal Society, The
Articles dans des revues avec comité de lecture

accelerometer – dynamic body acceleration – field metabolic rate – muscle efficiency – seabird