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Flipper strokes can predict energy expenditure and locomotion costs in free-ranging northern and Antarctic fur seals

Jeanniard-du-Dot, Tiphaine, Trites, Andrew W, Arnould, John PY, Speakman, John R and Guinet, Christophe 2016, Flipper strokes can predict energy expenditure and locomotion costs in free-ranging northern and Antarctic fur seals, Scientific reports, vol. 6, pp. 1-12, doi: 10.1038/srep33912.

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Title Flipper strokes can predict energy expenditure and locomotion costs in free-ranging northern and Antarctic fur seals
Author(s) Jeanniard-du-Dot, Tiphaine
Trites, Andrew W
Arnould, John PYORCID iD for Arnould, John PY orcid.org/0000-0003-1124-9330
Speakman, John R
Guinet, Christophe
Journal name Scientific reports
Volume number 6
Start page 1
End page 12
Total pages 12
Publisher Nature Publishing Group
Place of publication London, Eng.
Publication date 2016-09
ISSN 2045-2322
2045-2322
Keyword(s) Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
DOUBLY LABELED WATER
LIONS EUMETOPIAS-JUBATUS
FIELD METABOLIC-RATES
HEART-RATE
ELEPHANT SEALS
DIVING BEHAVIOR
CHELONIA-MYDAS
OXYGEN-CONSUMPTION
MARINE MAMMALS
PHOCA-VITULINA
Summary Flipper strokes have been proposed as proxies to estimate the energy expended by marine vertebrates while foraging at sea, but this has never been validated on free-ranging otariids (fur seals and sea lions). Our goal was to investigate how well flipper strokes correlate with energy expenditure in 33 foraging northern and Antarctic fur seals equipped with accelerometers, GPS, and time-depth recorders. We concomitantly measured field metabolic rates with the doubly-labelled water method and derived activity-specific energy expenditures using fine-scale time-activity budgets for each seal. Flipper strokes were detected while diving or surface transiting using dynamic acceleration. Despite some inter-species differences in flipper stroke dynamics or frequencies, both species of fur seals spent 3.79 ± 0.39 J/kg per stroke and had a cost of transport of ~1.6-1.9 J/kg/m while diving. Also, flipper stroke counts were good predictors of energy spent while diving (R(2) = 0.76) and to a lesser extent while transiting (R(2) = 0.63). However, flipper stroke count was a poor predictor overall of total energy spent during a full foraging trip (R(2) = 0.50). Amplitude of flipper strokes (i.e., acceleration amplitude × number of strokes) predicted total energy expenditure (R(2) = 0.63) better than flipper stroke counts, but was not as accurate as other acceleration-based proxies, i.e. Overall Dynamic Body Acceleration.
Language eng
DOI 10.1038/srep33912
Field of Research 060201 Behavioural Ecology
060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086615

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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