The importance of preening behaviour in the at-sea time budget of Australasian gannets

Fauchet, Louarn; Cansse, Thomas; Arnould, John P. Y.

doi:10.1080/01584197.2021.1961590

Cited by 1 publication

(2 citation statements)

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“…As the energy expenditure of resting on land varies between day and night in gannets ( Green et al, 2013 ), similar patterns may be present in resting at sea behaviour. Indeed, Fauchet et al (2021) demonstrated that time spent preening was significantly higher during the day. Furthermore, this high-cost behaviour often occurred after dives, probably in response to plumage disturbance.…”

Section: Discussionmentioning

confidence: 99%

“…Interestingly, energy expenditure values for at-sea resting were higher than those for on-land resting. This may be due to high-cost preening behaviours occurring within this period ( Fauchet et al, 2021 ). Although it was not possible to quantify preening behaviour in the current study, it has been shown to incur high costs and comprise large proportions of at-sea periods in Australasian gannets ( Fauchet et al, 2021 ) and other seabird species ( Croll and McLaren, 1993 ; McInnes et al, 2017 ; Thiebault et al, 2014a ).…”

Section: Discussionmentioning

confidence: 99%

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Determining energy expenditure in a large seabird using accelerometry

Sutton,

Angel,

Speakman

et al. 2023

Journal of Experimental Biology

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The trade off between energy gained and expended is the foundation of understanding how, why and when animals perform any activity. Based on the concept that animal movements have an energetic cost, accelerometry is increasingly being used to estimate energy expenditure. However, validation of accelerometry as an accurate proxy for field metabolic rate in free-ranging species is limited. In the present study, Australasian gannets (Morus serrator) from the Pope's Eye colony (38°16'42”S 144°41'48”E), south-eastern Australia, were equipped with GPS and tri-axial accelerometers and dosed with doubly-labelled water (DLW) to measure energy expenditure during normal behaviour for 3-5 days. The correlation between daily energy expenditure from the DLW and Vectorial Dynamic Body Acceleration (VeDBA) was high for both a simple correlation and activity-specific approaches (R2=0.75 and 0.80, respectively). Varying degrees of success were observed for estimating at-sea metabolic rate from accelerometry when removing time on land using published energy expenditure constants (R2=0.02) or activity-specific approaches (R2=0.42). The predictive capacity of energy expenditure models for total and at-sea periods were improved by the addition of total distance travelled and proportion of the sampling period spent at sea during the night, respectively (R2= 0.61-0.82). These results indicate that accelerometry can be used to estimate daily energy expenditure in free-ranging gannets and its accuracy may depend on the inclusion of movement parameters not detected by accelerometry.

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Section: Discussionmentioning

confidence: 99%