Data from: Accelerometers can measure total and activity-specific energy expenditure in free-ranging marine mammals only if linked to time-activity budgets ...

• Main Authors: Jeanniard-Du-Dot, Tiphaine, Guinet, Christophe, Arnould, John P. Y., Speakman, John R., Trites, Andrew W., Arnould, John P.Y.
• Format: Dataset
• Language: English
• Published: Dryad 2017
• Subjects: ODBA; Antarctic fur seal; Callorhinus ursinus; Time-activity budget; northern fur seal; Foraging; 2011-2012; Arctocephalus gazella; Acceleration; VeDBA; Antarctic; Bering Sea; Kerguelen; Kerguelen Island; Pointe Suzanne; Southern Ocean; Antarc*; Antarctic Fur Seal; Antarctic Fur Seals; Alaska; Northern fur seal
• Online Access: https://dx.doi.org/10.5061/dryad.n8s3c; https://datadryad.org/stash/dataset/doi:10.5061/dryad.n8s3c

Energy expenditure is an important component of foraging ecology, but is extremely difficult to estimate in free-ranging animals and depends on how animals partition their time between different activities during foraging. Acceleration data have emerged as a new way to determine energy expenditure at a fine scale but this needs to be tested and validated in wild animals. This study investigated whether vectorial dynamic body acceleration (VeDBA) could accurately predict the energy expended by marine predators during a full foraging trip. We also aimed to determine whether the accuracy of predictions of energy expenditure derived from acceleration increased when partitioned by different types of at-sea activities (i.e. diving, transiting, resting and surface activities). To do so, we equipped 20 lactating northern (Callorhinus ursinus) and 20 lactating Antarctic fur seals (Arctocephalus gazella) with GPS, time-depth recorders and tri-axial accelerometers and obtained estimates of field metabolic rates using ... : Northern fur seals dataData was collected on northern fur seal females during the breeding season on St Paul island, Bering Sea, Alaska from a daily Diary tag from Wildlife Computers. Column headings include "Date", "Time","Depth", "External Temperature", "int mX", "int mY", "int mZ", "int aX", "int aY", "int aZ", "Light Level", "Velocity", "Wet/Dry", "Wet/Dry", "Hour", "Battery Voltage", "Protocol". int mX, Y, Z refer to magnetic field recorded on the 3 body axes, and int aX, Y, Z to the acceleration recorded on the same axes.Northern_fur_seals_data.zipAntarctic fur seal dataData was collected on Antarctic fur seal females during the breeding season on Kerguelen Island, Southern Ocean on The Pointe Suzanne colony from a Daily Diary tag from Wildlife Computers. Column headings include "Date", "Time", "Depth", "Temperature", "aX", "aY", "aZ", "Light", "Velocity", "WetDry", "WetDrytxt". aX, Y, Z refer to the acceleration recorded on the 3 body axes.Antarctic_fur_seal_data.zip ...