eCite Digital Repository

Variability in the diving activity of Antarctic fur seals, Arctocephalus gazella, at Iles Kerguelen

Citation

Lea, MA and Hindell, MA and Guinet, C and Goldsworthy, SD, Variability in the diving activity of Antarctic fur seals, Arctocephalus gazella, at Iles Kerguelen, Polar Biology, 25, (4) pp. 269-279. ISSN 0722-4060 (2002) [Refereed Article]

DOI: doi:10.1007/s00300-001-0339-6

Abstract

Intra-population variation in diving behaviour of lactating Antarctic fur seals (Arctocephalus gazella) was studied at the Kerguelen Archipelago (49°07′S, 70°45′E) during the austral summers of 1998-2000. Dive data were successfully recorded for 112 seals equipped with time-depth recorders during 117 foraging trips. All seals displayed bouts of diving activity and the nocturnal foraging behaviour typical of otariids preying on pelagic fish and squid. Mean dive depth (53 m) was considerably deeper than recorded for this species at other sites. Four diving behaviour groups were identified: (1) deep divers (n = 60); (2) shallow-active divers (n = 45); (3) shallow divers (n = 9); (4) daytime divers (n = 3). The distribution of trips assigned to the various behavioural dive groups varied significantly between years. Antarctic fur seals at Kerguelen exhibit flexible diving strategies both within and between populations in response to changes in environmental conditions and prey availability. Electronic supplementary material to this paper can be obtained by using the Springer Link server located at http://dx.doi.org/10.1007/s00300-001-0339-6.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Environmental management
Research Field:Wildlife and habitat management
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Assessment and management of coastal and estuarine ecosystems
UTAS Author:Lea, MA (Associate Professor Mary-Anne Lea)
UTAS Author:Hindell, MA (Professor Mark Hindell)
ID Code:25441
Year Published:2002
Web of Science® Times Cited:53
Deposited By:Zoology
Deposited On:2002-08-01
Last Modified:2011-08-02
Downloads:0

Repository Staff Only: item control page