eCite Digital Repository

Acoustic analysis of crabeater seal (Lobodon carcinophaga) vocalizations in the Southern Kerguelen Plateau region of East Antarctica

Citation

Nagaraj, H and Owen, K and Lea, MA and Miller, BS, Acoustic analysis of crabeater seal (Lobodon carcinophaga) vocalizations in the Southern Kerguelen Plateau region of East Antarctica, Journal of the Acoustical Society of America, 150, (5) pp. 3353-3361. ISSN 0001-4966 (2021) [Refereed Article]

DOI: doi: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.

Item Details

Item Type:Refereed Article
Keywords:crabeater seal, vocalizations, East Antarctica
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural ecology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Nagaraj, H (Mr Harsha Nagaraj)
UTAS Author:Lea, MA (Professor Mary-Anne Lea)
ID Code:152018
Year Published:2021
Web of Science® Times Cited:1
Deposited By:Ecology and Biodiversity
Deposited On:2022-08-10
Last Modified:2022-08-10
Downloads:0

Repository Staff Only: item control page