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Three-dimensional dive profiles of free-ranging Weddell seals

Citation

Harcourt, RG and Hindell, MA and Bell, DG and Wass, JR, Three-dimensional dive profiles of free-ranging Weddell seals, Polar Biology, 23, (7) pp. 479-487. ISSN 0722-4060 (2000) [Refereed Article]

DOI: doi:10.1007/s003000000109

Abstract

We used an acoustic tracking system to record under-ice movements of two free-ranging adult male Weddell seals. The two males were unconstrained and interacting with other Weddell seals at a breeding colony in McMurdo Sound, Antarctica. We reconstructed three-dimensional paths of 279 dives by these seals. All dives were less than 20-min duration and none were deeper than 220 m. These three-dimensional dive profiles were compared with conventional time-depth dive profiles recorded using microprocessor loggers. We assigned each of the 279 dives to 1 of 6 classes using an existing classification scheme on the basis of the time-depth trace. Within these, two-dimensionally derived, classes the actual three-dimensional dive profiles at times varied profoundly. Additional parameters obtained with the acoustic system, such as bearing and distance travelled between diving and surfacing points, demonstrate that significant, additional, biologically important information can be derived from the three-dimensional data.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Environmental Science and Management
Research Field:Wildlife and Habitat Management
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments
Author:Hindell, MA (Professor Mark Hindell)
ID Code:20083
Year Published:2000
Web of Science® Times Cited:44
Deposited By:Zoology
Deposited On:2000-08-01
Last Modified:2011-08-04
Downloads:0

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