Changing the Look on Seals from Pole to Pole with Satellite Technology

  • Arnoldus Schytte BlixEmail author
  • Lars P. Folkow
  • Erling S. Nordøy
Part of the From Pole to Pole book series (POLE)


All seals are dependent on land or ice to breed upon, and many species of seals spend their entire life in close proximity to the coast or the edge of ice, where they can be observed and collected throughout the year. However, several species of phocid seals are pelagic outside the short breeding and moulting periods, and it was not until the invention of satellite linked dive recorders (SLDRs) some 20 years ago that we could start to learn about the whereabouts and behaviour of several ecologically and economically important species of seals outside the breeding season. Also, knowledge of the seasonal distribution and diet composition of many species of seals had until then been based on incidental sightings and occasional shipboard surveys and analysis of a limited number of stomach contents from animals shot in the pack ice. Thus, while these studies have provided knowledge of the diet of seals where they are most accessible for collection, erroneous conclusions may be drawn by extrapolating from such studies if large proportions of the stocks spend a considerable amount of time in open water, where they may pursue different prey species.


Elephant Seal Harp Seal Southern Elephant Seal Hooded Seal Leopard Seal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. Bester MN, Ferguson JWH, Jonker FC (2002) Population densities of pack ice seals in the Lazarev Sea, Antarctica. Antarct Sci 14:123–127CrossRefGoogle Scholar
  2. Blix AS, Nordoy ES (1998) Ross seal diving behaviour and distribution: a reassessment? NZ Nat Sci 23(Suppl):14Google Scholar
  3. Blix AS, Nordoy ES (2007) Ross seal (Ommatophoca rossii) annual distribution, diving behaviour, breeding and moulting, off Queen Maud Land, Antarctica. Polar Biol 30:1449–1458CrossRefGoogle Scholar
  4. Blix AS, Walloe L, Messelt EB, Folkow LP (2010) Selective brain cooling and its vascular basis in diving seals. J Exp Biol 213:2610–2616Google Scholar
  5. Bowen WD, Oftedal OT, Boness DJ (1985) Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata. Can J Zool 63:2841–2846CrossRefGoogle Scholar
  6. Burns JM, Lestyk K, Folkow LP, Hammill MO, Blix AS (2007) Size and distribution of oxygen stores in harp and hooded seals from birth to maturity. J Comp Physiol B 177:687–700CrossRefGoogle Scholar
  7. Condy PR (1977) Results of the fourth seal survey in the King Haakon VII Sea, Antarctica. S Afr J Antarct Res 7:10–13Google Scholar
  8. Folkow LP, Blix AS (1995) Distribution and diving behaviour of hooded seals. In: Blix AS, Walloe L, Ulltang Ø (eds) Whales, seals, fish and man. Elsevier Science BV, Amsterdam, pp 193–202Google Scholar
  9. Folkow LP, Blix AS (1999) Diving behaviour of hooded seals (Cystophora cristata) in the Greenland and Norwegian Seas. Polar Biol 22:61–74CrossRefGoogle Scholar
  10. Folkow LP, Blix AS (2010) Air breathers under water: diving mammals and birds. In: Nilsson GE (ed) Respiratory physiology of vertebrates. Cambridge University Press, Cambridge, pp 221–264Google Scholar
  11. Folkow LP, Mårtensson P-E, Blix AS (1996) Annual distribution of hooded seals (Cystophora cristata) in the Greenland and Norwegian Seas. Polar Biol 16:179–189CrossRefGoogle Scholar
  12. Folkow LP, Nordoy ES, Blix AS (2004) Distribution and diving behaviour of harp seals (Pagophilus groenlandicus) from the Greenland Sea stock. Polar Biol 27:281–298CrossRefGoogle Scholar
  13. Folkow LP, Nordoy ES, Blix AS (2010) Remarkable development of diving performance and migrations of hooded seals (Cystophora cristata) during their first year of life. Polar Biol 33:433–441CrossRefGoogle Scholar
  14. Hindell MA, Slip DJ, Burton HR (1991) The diving behaviour of adult male and female southern elephant seals, Mirounga leonina, (Pinnipedia, Phocidae) Austr. J Zool 39:595–619Google Scholar
  15. Hoffman R, Erickson A, Siniff D (1973) The ross seal (Ommatophoca rossii) In: Seals. IUCN publ new series, suppl paper No 39. IUCN, Morges. pp 129–139Google Scholar
  16. King JE (1983) Seals of the World. Oxford University Press, OxfordGoogle Scholar
  17. Kooyman GL, Wahrenbrock EA, Castellini MA, Davis RA, Sinett EE (1980) Aerobic and anaerobic metabolism during voluntary diving in Weddell seals: evidence of preferred pathways from blood chemistry and behaviour. J Comp Physiol 138:335–346Google Scholar
  18. Kvadsheim PH, Folkow LP, Blix AS (2005) Inhibition of shivering in hypothermic seals during diving. Am J Physiol 289:R326–R331Google Scholar
  19. Laws RM (1973) The current status of seals in the southern hemisphere. In: Seals. IUCN Suppl. Paper No. 39. pp 144–161Google Scholar
  20. Laws RM (1984) Seals. In: Laws RM (ed) Antarctic ecology. Academic Press, London, pp 621–715Google Scholar
  21. McIntyre T, de Bruyn PJN, Ansorge IJ, Bester MN, Bornemann H, Plötz J, Tosh CA (2010) A lifetime at depth: vertical distribution of southern elephant seals in the water column. Polar Biol 33:1037–1048CrossRefGoogle Scholar
  22. Nansen F (1890) Paa ski over Grønland (The First Crossing of Greenland). Aschehoug, KristianiaGoogle Scholar
  23. Nordoy ES, Blix AS (1998) Seasonal distribution, dive behaviour and temperatures at depth of crabeater seals. NZ Nat Sci 23(Suppl):137Google Scholar
  24. Nordoy ES, Blix AS (2009) Movements and dive behaviour of two leopard seals (Hydrurga leptonyx) off Queen Maud Land, Antarctica. Polar Biol 32:263–270CrossRefGoogle Scholar
  25. Nordøy ES, Folkow L, Blix AS (1995) Distribution and diving behavior of crabeater seals (Lobodon carcinophagus) off Queen Maud Land. Polar Biol 15:261–268CrossRefGoogle Scholar
  26. Nordoy ES, Folkow LP, Potelov V, Prischemikhin V, Blix AS (2008) Seasonal distribution and dive behaviour of harp seals (Pagophilus groenlandicus) of the White Sea-Barents Sea stock. Polar Biol 31:1119–1135CrossRefGoogle Scholar
  27. Ramirez J-M, Folkow LP, Blix AS (2007) Hypoxia tolerance in mammals and birds: from the wilderness to the clinic. Annu Rev Physiol 69:113–143CrossRefGoogle Scholar
  28. Southwell C, Bengtson J, Bester, M, Blix AS, Bornemann H, Boveng P, Cameron M, Forcada J, Laake J, Nordoy E, Plöz J, Rogers T, Southwell D, Steinhage D, Stewart BS, Trathan P (2012) A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the southern ocean. CCAMLR Science (in press)Google Scholar
  29. Southwell CJ, Paxton CGM, Borchers DL, Boveng PL, Nordoy ES, Blix AS, De la Mare WK (2008) Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica. Antarctic Sci 20:123–133CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Arnoldus Schytte Blix
    • 1
    Email author
  • Lars P. Folkow
    • 1
  • Erling S. Nordøy
    • 1
  1. 1.Department of Arctic BiologyUniversity of TromsøTromsøNorway

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