Innovative Use of Depth Data to Estimate Energy Intake and Expenditure in Adélie Penguins
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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Yn: Journal of Experimental Biology, 12.10.2024.
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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T1 - Innovative Use of Depth Data to Estimate Energy Intake and Expenditure in Adélie Penguins
AU - Dupuis, Benjamin
AU - Kato, Akiko
AU - Hicks, Olivia
AU - Wisniewska, Danuta M.
AU - Marciau, Coline
AU - Angelier, Frederic
AU - Ropert-Coudert, Yan
AU - Chimienti, Marianna
PY - 2024/10/12
Y1 - 2024/10/12
N2 - Energy governs species’ life histories and pace of living, requiring individuals to make trade-offs. However, measuring energetic parameters in the wild is challenging, often resulting in data collected from heterogeneous sources. This complicates comprehensive analysis and hampers transferability within and across case studies. We present a novel framework, combining information obtained from eco-physiology and biologging techniques, to estimate both energy expended and acquired on 48 Adélie penguins (Pygoscelis adeliae) during the chick-rearing stage. We employ the machine learning algorithm random forest (RF) to predict accelerometry-derived metrics for feeding behaviour using depth data (our proxy for energy acquisition). We also build a time-activity model calibrated with doubly labelled water data to estimate energy expenditure. Using depth-derived time spent diving and amount of vertical movement in the subsurface phase, we accurately predict energy expenditure (R² = 0.68, RMSE = 344.67). Movement metrics derived from the RF algorithm deployed on depth data were able to accurately (accuracy = 0.82) detect the same feeding behaviour predicted from accelerometry. The RF predicted accelerometry-estimated time spent feeding more accurately (R² = 0.81) compared to historical proxies like number of undulations (R² = 0.51) or dive bottom duration (R² = 0.31). The proposed framework is accurate, reliable, and simple to implement on data from biologging technology widely-used on marine species. It enables coupling energy intake and expenditure, which is crucial to further assess individual trade-offs. Our work allows us to revisit historical data, to study how long-term environmental changes affect animals’ energetics.
AB - Energy governs species’ life histories and pace of living, requiring individuals to make trade-offs. However, measuring energetic parameters in the wild is challenging, often resulting in data collected from heterogeneous sources. This complicates comprehensive analysis and hampers transferability within and across case studies. We present a novel framework, combining information obtained from eco-physiology and biologging techniques, to estimate both energy expended and acquired on 48 Adélie penguins (Pygoscelis adeliae) during the chick-rearing stage. We employ the machine learning algorithm random forest (RF) to predict accelerometry-derived metrics for feeding behaviour using depth data (our proxy for energy acquisition). We also build a time-activity model calibrated with doubly labelled water data to estimate energy expenditure. Using depth-derived time spent diving and amount of vertical movement in the subsurface phase, we accurately predict energy expenditure (R² = 0.68, RMSE = 344.67). Movement metrics derived from the RF algorithm deployed on depth data were able to accurately (accuracy = 0.82) detect the same feeding behaviour predicted from accelerometry. The RF predicted accelerometry-estimated time spent feeding more accurately (R² = 0.81) compared to historical proxies like number of undulations (R² = 0.51) or dive bottom duration (R² = 0.31). The proposed framework is accurate, reliable, and simple to implement on data from biologging technology widely-used on marine species. It enables coupling energy intake and expenditure, which is crucial to further assess individual trade-offs. Our work allows us to revisit historical data, to study how long-term environmental changes affect animals’ energetics.
M3 - Article
JO - Journal of Experimental Biology
JF - Journal of Experimental Biology
SN - 0022-0949
ER -