[MARMAM] New Publication: Acoustic analysis of crabeater seal (Lobodon carcinophaga) vocalizations in Southern Kerguelen Plateau region of East Antarctica

Harsha Nagaraj nharsha1996 at gmail.com
Sun Nov 28 16:09:18 PST 2021


Dear MARMAMers,

We are delighted to share our publication titled 'Acoustic analysis of
crabeater seal (Lobodon carcinophaga) vocalizations in Southern Kerguelen
Plateau region of East Antarctica.'

Nagaraj, H., Owen, K., Lea, M-A., Miller, B.S. (2021). " Acoustic analysis
of crabeater seal (Lobodon carcinophaga) vocalizations in Southern
Kerguelen Plateau region of East Antarctica". Journal of Acoustical Society
of America 150 (5), 3353-3361.

DOI: https://doi.org/10.1121/10.0006789

Abstract: Crabeater seals are circumpolar, ice-dependent seals that produce
distinct vocalizations during the breeding season. This study provides the
first description of the acoustic repertoire of the crabeater seal in East
Antarctica, using data from a stationary hydrophone at 1.8 km depth in the
Southern Kerguelen Plateau region in 2014–2015. Two call types were
identified in the data set: the low and the high moan calls. Of the 8821
calls detected, 92.5% were classified as low moan calls and 7.5% were high
moan calls. The mean duration of the two call types was similar (2.3 and
2.8 s,  respectively), however, the high moan calls had a higher frequency
range (1020–4525 Hz, n =11) than the low moan calls (360–2753 Hz, n =120).
The calls were primarily detected in the austral spring. Diel analysis
showed that the low moan calls were mostly made at nighttime or proximal to
dusk and dawn. The results of this study could aid in the development of
automated detectors for crabeater seal vocalizations. This would facilitate
comparisons of the distribution and abundance of the species using extant
acoustic data and could increase knowledge on the breeding behavior of
crabeater seals.

Please don't hesitate to send an email to *nharsha1996 at gmail.com
<nharsha1996 at gmail.com> *requesting a copy and for more information.
--
Best Regards
*Harsha Nagaraj*
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