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. 2014 Apr 23;2(1):8. doi: 10.1186/2051-3933-2-8

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© Louzao et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Energy-budget model validation plots. (a) Total TNEG converted to mass units (predicted body mass change) should approximate to body mass change between the arrival and departure (observed). 5 complete foraging trips were only available out of 18. Red and black dots represent predicted body mass change based on fine-scale (FS; 10 activities) and wide-scale (WS; only flying and resting) activities, respectively. (b) Histogram of the observed distribution of body mass change for incubation and brooding. Predicted values are represented by red dots. (c) Individual predictions of energy expenditure (mean and interval confidences) based on heart rate (HR) values corresponding to 18 albatrosses contrasted against an empirical distribution of energy expenditure based on the Doubly Labelled Water (DLW) method (grey histogram) from [44–46]. Individual predictions differed by considering wide-scale (WB in black, only flying and resting) and fine-scale (FB in red,10 activities from A to J, Figure 1) activities.