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Massie, Philip P; McIntyre, Trevor; Ryan, Peter G; Bester, Marthán Nieuwoudt; Bornemann, Horst; Ansorge, Isabelle J (2015): Water temperature data from southern elephant seal from Marion Island with links to datasets. PANGAEA, https://doi.org/10.1594/PANGAEA.150014, Supplement to: Massie, PP et al. (2015): The role of eddies in the diving behaviour of female southern elephant seals. Polar Biology, 11 pp, https://doi.org/10.1007/s00300-015-1782-0

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Abstract:
As the Antarctic Circumpolar Current crosses the South-West Indian Ocean Ridge, it creates an extensive eddy field characterised by high sea level anomaly variability. We investigated the diving behaviour of female southern elephant seals from Marion Island during their post-moult migrations in relation to this eddy field in order to determine its role in the animals' at-sea dispersal. Most seals dived within the region significantly more often than predicted by chance, and these dives were generally shallower and shorter than dives outside the eddy field. Mixed effects models estimated reductions of 44.33 ± 3.00 m (maximum depth) and 6.37 ± 0.10 min (dive duration) as a result of diving within the region, along with low between-seal variability (maximum depth: 5.5 % and dive duration: 8.4 %). U-shaped dives increased in frequency inside the eddy field, whereas W-shaped dives with multiple vertical movements decreased. Results suggest that Marion Island's adult female elephant seals' dives are characterised by lowered cost-of-transport when they encounter the eddy field during the start and end of their post-moult migrations. This might result from changes in buoyancy associated with varying body condition upon leaving and returning to the island. Our results do not suggest that the eddy field is a vital foraging ground for Marion Island's southern elephant seals. However, because seals preferentially travel through this area and likely forage opportunistically while minimising transport costs, we hypothesise that climate-mediated changes in the nature or position of this region may alter the seals' at-sea dispersal patterns.
Related to:
McIntyre, Trevor; Ansorge, Isabelle J; Bornemann, Horst; Plötz, Joachim; Tosh, Cheryl Ann; Bester, Marthán Nieuwoudt (2011): Ocean temperature measured by elephant seal-CTDs in the Southern Ocean with links to datasets. University of Pretoria, Department of Zoology & Entomology, PANGAEA, https://doi.org/10.1594/PANGAEA.793267
Project(s):
Coverage:
Median Latitude: -47.038061 * Median Longitude: 34.232822 * South-bound Latitude: -61.344000 * West-bound Longitude: 0.428000 * North-bound Latitude: -32.471000 * East-bound Longitude: 39.735000
Date/Time Start: 2007-01-30T08:40:00 * Date/Time End: 2011-01-08T23:00:00
Event(s):
MAR2007_sel_a_f_02 * Latitude Start: -46.870000 * Longitude Start: 37.860000 * Latitude End: -46.904000 * Longitude End: 37.846000 * Date/Time Start: 2007-02-01T12:10:00 * Date/Time End: 2007-12-30T12:00:00 * Location: Southern Ocean - Indian sector * Campaign: MAR2007 * Basis: Marion Island Research Station * Method/Device: Marine endotherm (MET) * Comment: Mirounga leonina, adult female
MAR2007_sel_a_f_06 * Latitude Start: -46.890000 * Longitude Start: 37.870000 * Latitude End: -46.900000 * Longitude End: 37.894000 * Date/Time Start: 2007-01-30T08:40:00 * Date/Time End: 2007-10-08T11:00:00 * Location: Southern Ocean - Indian sector * Campaign: MAR2007 * Basis: Marion Island Research Station * Method/Device: Marine endotherm (MET) * Comment: Mirounga leonina, adult female
MAR2007_sel_a_f_18 * Latitude Start: -46.841000 * Longitude Start: 37.828000 * Latitude End: -46.849000 * Longitude End: 37.817000 * Date/Time Start: 2007-10-31T08:30:00 * Date/Time End: 2008-01-16T12:00:00 * Location: Southern Ocean - Indian sector * Campaign: MAR2007 * Basis: Marion Island Research Station * Method/Device: Marine endotherm (MET) * Comment: Mirounga leonina, adult female
Comment:
See "Related to:" for further dataset used by this publications.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Campaign of eventCampaignBornemann, Horst
2Event labelEventBornemann, Horst
3Date/Time of eventDate/TimeBornemann, Horst
4Latitude of eventLatitudeBornemann, Horst
5Longitude of eventLongitudeBornemann, Horst
6Date/Time of event 2Date/Time 2Bornemann, Horst
7Latitude of event 2Latitude 2Bornemann, Horst
8Longitude of event 2Longitude 2Bornemann, Horst
9Author(s)Author(s)Bornemann, Horst
10Year of publicationYearBornemann, Horst
11TitleTitleBornemann, Horst
12Reference/sourceReferenceBornemann, Horst
13Persistent IdentifierPersistent IdentifierBornemann, Horst
Size:
110 data points

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