An acoustic technique for determining diurnal activities in leopard ( Hydrurga leptonyx ) and crabeater ( Lobodon carcinophagus ) seal

Hourly variations in the rate of underwater vocalizations produced by leopard (Hydrurga leptonyx) and crabeater seals (Lobodon carcinophagus) were compared with counts of these seals on ice floes. For both species maximum "haulout" corresponded with minimum underwater vocalizations. Conseq...

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Bibliographic Details
Published in:Canadian Journal of Zoology
Main Authors: Thomas, J. A., DeMaster, D. P.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1982
Subjects:
Animal Science and Zoology
Ecology, Evolution, Behavior and Systematics
Hydrurga
Crabeater Seals
Hydrurga leptonyx
Lobodon carcinophagus
Online Access:http://dx.doi.org/10.1139/z82-260
http://www.nrcresearchpress.com/doi/pdf/10.1139/z82-260
Description
Summary:Hourly variations in the rate of underwater vocalizations produced by leopard (Hydrurga leptonyx) and crabeater seals (Lobodon carcinophagus) were compared with counts of these seals on ice floes. For both species maximum "haulout" corresponded with minimum underwater vocalizations. Consequently, sampling the vocal behaviour of pinnipeds may be used to determine their diurnal haulout pattern. This underwater vocalization rate potentially may be used to calculate a series of hourly correction factors that compensate for submerged seals not seen during a census.

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