Detecting surface-feeding behavior by rorqual whales in accelerometer data

Owen, Kylie, Dunlop, Rebecca A., Monty, Jason P., Chung, Daniel, Noad, Michael J., Donnelly, David, Goldizen, Anne W. and Mackenzie, Thomas (2016) Detecting surface-feeding behavior by rorqual whales in accelerometer data. Marine Mammal Science, 32 1: 327-348. doi:10.1111/mms.12271


Author Owen, Kylie
Dunlop, Rebecca A.
Monty, Jason P.
Chung, Daniel
Noad, Michael J.
Donnelly, David
Goldizen, Anne W.
Mackenzie, Thomas
Title Detecting surface-feeding behavior by rorqual whales in accelerometer data
Journal name Marine Mammal Science   Check publisher's open access policy
ISSN 1748-7692
0824-0469
Publication date 2016
Year available 2015
Sub-type Article (original research)
DOI 10.1111/mms.12271
Open Access Status Not Open Access
Volume 32
Issue 1
Start page 327
End page 348
Total pages 22
Place of publication Hoboken NJ, United States
Publisher Wiley-Blackwell Publishing
Collection year 2016
Language eng
Abstract The movement of marine animals feeding at the sea surface is restricted by wave drag and a reduction in propulsive efficiency. Many rorqual whale species lunge feed at the surface, yet existing methodologies for detecting lunges in accelerometer data have not been applied to surface-feeding behavior. Our study aimed to develop a method to detect surface-feeding behavior in accelerometer data and in doing so, determine whether wave drag influences the detection of surface-feeding behavior. A new acceleration parameter is described that considers the forward acceleration of the animal relative to its pitch. The new parameter, along with information on the deceleration and pitch angle, was then used in an automatic lunge detecting algorithm followed by a visual classification method that detected approximately 70% of the lunges observed during focal follow sampling. The forward acceleration of lunges decreased significantly with increasing proximity to the surface. This lower acceleration at the surface may influence the ability to detect lunge feeding behavior close to the surface. Future research should attempt to determine the cause of this relationship, which may be the influence of changes in the forces acting on the whale or behavioral flexibility by the whale.
Keyword Drag
DTAG
Excess x-acceleration
Foraging effort
Humpback whale
Lunge
Minimum specific acceleration
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
School of Veterinary Science Publications
 
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