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dc.contributor.authorGunner, Richard
dc.contributor.authorWilson, Rory P.
dc.contributor.authorHolton, Mark D.
dc.contributor.authorScott, Rebecca
dc.contributor.authorHopkins, Phil
dc.contributor.authorDuarte, Carlos M.
dc.identifier.citationGunner, R. M., Wilson, R. P., Holton, M. D., Scott, R., Hopkins, P., & Duarte, C. M. (2020). A new direction for differentiating animal activity based on measuring angular velocity about the yaw axis. Ecology and Evolution. doi:10.1002/ece3.6515
dc.description.abstractThe use of animal-attached data loggers to quantify animal movement has increased in popularity and application in recent years. High-resolution tri-axial acceleration and magnetometry measurements have been fundamental in elucidating fine-scale animal movements, providing information on posture, traveling speed, energy expenditure, and associated behavioral patterns. Heading is a key variable obtained from the tandem use of magnetometers and accelerometers, although few field investigations have explored fine-scale changes in heading to elucidate differences in animal activity (beyond the notable exceptions of dead-reckoning). This paper provides an overview of the value and use of animal heading and a prime derivative, angular velocity about the yaw axis, as an important element for assessing activity extent with potential to allude to behaviors, using “free-ranging” Loggerhead turtles (Caretta caretta) as a model species. We also demonstrate the value of yaw rotation for assessing activity extent, which varies over the time scales considered and show that various scales of body rotation, particularly rate of change of yaw, can help resolve differences between fine-scale behavior-specific movements. For example, oscillating yaw movements about a central point of the body's arc implies bouts of foraging, while unusual circling behavior, indicative of conspecific interactions, could be identified from complete revolutions of the longitudinal axis. We believe this approach should help identification of behaviors and “space-state” approaches to enhance our interpretation of behavior-based movements, particularly in scenarios where acceleration metrics have limited value, such as for slow-moving animals.
dc.description.sponsorshipWe are grateful to Phil Hopkins and engineers from the Technical and Logistical center (TLZ) at GEOMAR for help with the tag housings and to Mark Holton for conceiving and regularly updating the DDMT software.
dc.description.sponsorshipExzellenzcluster Ozean der Zukunft. Grant Number: CP1217, King Abdullah University of Science and Technology (KAUST)
dc.rightsArchived with thanks to Ecology and Evolution
dc.titleA new direction for differentiating animal activity based on measuring angular velocity about the yaw axis
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentMarine Science Program
dc.contributor.departmentRed Sea Research Center (RSRC)
dc.identifier.journalEcology and Evolution
dc.contributor.institutionSwansea Lab for Animal Movement, Biosciences, College of Science, Swansea University, Swansea, UK
dc.contributor.institutionFuture Ocean Cluster of Excellence, GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany
dc.contributor.institutionNatural Environmental Research Council, Polaris House, Swindon, UK
kaust.personDuarte, Carlos M.

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