Polar Biology

, Volume 36, Issue 2, pp 211–222 | Cite as

Leopard seals (Hydrurga leptonyx) use suction and filter feeding when hunting small prey underwater

  • David P. HockingEmail author
  • Alistair R. Evans
  • Erich M. G. Fitzgerald
Original Paper


Leopard seals (Hydrurga leptonyx) are unusual among apex predators in that they feed at both the top and near the bottom of marine food webs; they capture and consume marine amniotes (seals and penguins) as well as krill. This is thought to be achieved with their unusual dentition: rostral caniniform teeth function to grip large prey and tricuspate postcanines function to sieve krill. The use of canine teeth is known, yet until now, the function of the postcanines has never been documented. Here, we present the first direct observations of filter feeding in leopard seals. Suction was used to draw small prey into the mouth followed by expulsion of ingested seawater through the sieve formed by postcanine teeth. Individuals show abrasive wear on canines and incisors, but not postcanines. This suggests that postcanines are not systematically used for piercing prey during macrophagous feeding, confirming that the postcanines primarily serve a sieving function. Rather than being less efficient at feeding as a result of its polarized diet, the leopard seal is well adapted towards two disparate feeding modes.


Dentition Foraging behaviour Pinnipedia Suction feeding 



We thank John Bengtson and one anonymous reviewer for critically reading early versions of this manuscript; Taronga Zoo and their marine mammal keepers for allowing access to animals in their care and for assistance with this research; W. Longmore, R. O’Brien and K. Roberts for access to Museum Victoria collections; Ady D’Ettore for the photograph in Fig. 5a; and Colin McHenry for provision of materials. This study was supported by Monash University, Museum Victoria and Taronga Conservation Society Australia. ARE acknowledges the support of the Australian Research Council. EMGF acknowledges the support of the Harold Mitchell Foundation.

Supplementary material

Video of underwater feeding in leopard seals during both feeding box experimental trials and during scatter feeds were free-floating fish are thrown into the pool (MP4 13417 kb)


  1. Adam PJ, Berta A (2002) Evolution of prey capture strategies and diet in the Pinnipedimorpha (Mammalia, Carnivora). Oryctos 4:83–107Google Scholar
  2. Ainley DG, Ballard G, Karl BJ, Dugger KM (2005) Leopard seal predation rates at penguin colonies of different size. Antarctic Sci 17:335–340. doi: 10.1017/s0954102005002750 CrossRefGoogle Scholar
  3. Bloodworth B, Marshall CD (2005) Feeding kinematics of Kogia and Tursiops (Odontoceti: Cetacea): characterization of suction and ram feeding. J Exp Biol 208:3721–3730. doi: 10.1242/jeb.01807 PubMedCrossRefGoogle Scholar
  4. Carbone C, Mace GM, Roberts SC, Macdonald DW (1999) Energetic constraints on the diet of terrestrial carnivores. Nature 402:286–288. doi: 10.1038/46266 PubMedCrossRefGoogle Scholar
  5. Casaux R, Baroni A, Ramón A, Carlini A, Bertolin M, DiPrinzio CY (2009) Diet of the leopard seal Hydrurga leptonyx at the Danco Coast, Antarctic Peninsula. Polar Biol 32:307–310. doi: 10.1007/s00300-008-0567-0 CrossRefGoogle Scholar
  6. Costa GC (2009) Predator size, prey size, and dietary niche breadth relationships in marine predators. Ecology 90:2014–2019. doi: 10.1890/08-1150.1 PubMedCrossRefGoogle Scholar
  7. Davis RW, Fuiman LA, Williams TM, Collier SO, Hagey WP, Kanatous SB, Kohin S, Horning M (1999) Hunting behavior of a marine mammal beneath the Antarctic fast ice. Science 283:993–996. doi: 10.1126/science.283.5404.993 PubMedCrossRefGoogle Scholar
  8. Edwards EWJ, Forcada J, Crossin GT (2010) First documentation of leopard seal predation of South Georgia pintail duck. Polar Biol 33:403–405. doi: 10.1007/s00300-009-0709-z CrossRefGoogle Scholar
  9. Fitzgerald EMG (2006) A bizarre new toothed mysticete (Cetacea) from Australia and the early evolution of baleen whales. Proc R Soc B 273:2955–2963. doi: 10.1098/rspb.2006.3664 PubMedCrossRefGoogle Scholar
  10. Fossette S, Gleiss AC, Casey JP, Lewis AR, Hays GC (2011) Does prey size matter? Novel observations of feeding in the leatherback turtle (Dermochelys coriacea) allow a test of predator—prey size relationships. Biol Letters. doi: 10.1098/rsbl.2011.0965 Google Scholar
  11. Hall-Aspland SA, Rogers TL (2004) Summer diet of leopard seals (Hydrurga leptonyx) in Prydz Bay, Eastern Antarctica. Polar Biol 27:729–734. doi: 10.1007/s00300-004-0662-9 CrossRefGoogle Scholar
  12. Hamilton JE (1939) The leopard seal Hydrurga leptonyx (De Blainville). Discovery Reports 18:239–264Google Scholar
  13. Heithaus MR, Dill LM (2009) Feeding strategies and tactics. In: Perrin WF, Würsig B, Thewissen JGM (eds) Encyclopedia of marine mammals, 2nd edn. Academic Press, San Diego, pp 414–423CrossRefGoogle Scholar
  14. Kane EA, Marshall CD (2009) Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales. J Exp Biol 212:3939–3950. doi: 10.1242/jeb.034686 PubMedCrossRefGoogle Scholar
  15. Kastelein RA, Mosterd P (1989) The excavation technique for molluscs of Pacific walrusses (Odobenus rosmarus divergens) under controlled conditions. Aquat Mamm 15(1):3–5Google Scholar
  16. Kastelein RA, Gerrits NM, Dubbeldam JL (1991) The anatomy of the walrus head (Odobenus rosmarus): part 2. Description of the muscles and of their role in feeding and haul-out behavior. Aquat Mamm 17:156–180Google Scholar
  17. Klages NTW, Cockcroft VG (1990) Feeding behaviour of a captive crabeater seal. Polar Biol 10:403–404. doi: 10.1007/BF00237828 Google Scholar
  18. Lowry LF, Testa JW, Calvert W (1988) Notes on winter feeding of crabeater and leopard seals near the Antarctic Peninsula. Polar Biol 8:475–478. doi: 10.1007/BF00264724 CrossRefGoogle Scholar
  19. Marshall CD, Kovacs KM, Lydersen C (2008) Feeding kinematics, suction and hydraulic jetting capabilities in bearded seals (Erignathus barbatus). J Exp Biol 211:699–708. doi: 10.1242/jeb.009852 PubMedCrossRefGoogle Scholar
  20. Naito Y, Bornemann H, Takahashi A, McIntyre T, Plötz J (2010) Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer. Polar Sci 4:309–316CrossRefGoogle Scholar
  21. Øritsland T (1977) Food consumption of seals in the Antarctic pack ice. In: Llano GA (ed) Adaptations within antarctic ecosystems, Proceedings of the Third SCAT symposium on Antarctic Biology, Smithsonian Institution, Washington DC, pp 749–768Google Scholar
  22. Rogers TL (2009) Leopard seal Hydrurga leptonyx. In: Perrin WF, Würsig B, Thewissen JGM (eds) Encyclopedia of Marine Mammals, 2nd edn. Academic Press, San Diego, pp 673–674CrossRefGoogle Scholar
  23. Ross GJB, Ryan F, Saayman GS, Skinner J (1976) Observations on two captive crabeater seals Lobodon carcinophagus at the Port Elizabeth Oceanarium. Intl Zoo Yearbook 16:160–164CrossRefGoogle Scholar
  24. Sanderson SL, Wassersug R (1993) Convergent and alternative designs for vertebrate suspension feeding. In: Hanken J, Hall BK (eds) The Skull, vol 3. University of Chicago Press, ChicagoGoogle Scholar
  25. Siniff DB, Stone S (1985) The role of the leopard seal in the tropho-dynamics of the Antarctic marine ecosystem. In: Siegfried WR, Condy PR, Laws RM (eds) Antarctic nutrient cycles and food webs. Springer, Berlin, pp 555–560Google Scholar
  26. Skinner JP (2009) Head striking during fish capture attempts by Steller sea lions and the potential for using head surge acceleration to predict feeding behaviour. Endangered Species Research 10:61–69. doi: 10.3354/esr00236 CrossRefGoogle Scholar
  27. Stephens DW, Krebs JR (1986) Foraging theory. Princeton University Press, Princeton NJGoogle Scholar
  28. Stirling I (1969) Tooth wear as a mortality factor in the Weddell seal, Leptonychotes weddelli. J Mammal 50:559–565CrossRefGoogle Scholar
  29. Viviant M, Trites AW, Rosen DAS, Monestiez P, Guinet C (2010) Prey capture attempts can be detected in Steller sea lions and other marine predators using accelerometers. Polar Biol 33:713–719. doi: 10.1007/s00300-009-0750-y CrossRefGoogle Scholar
  30. Werth AJ (2000a) Feeding in marine mammals. In: Schwenk K (ed) Feeding: form function and evolution in tetrapod vertebrates. Academic Press, San Diego, pp 487–526Google Scholar
  31. Werth AJ (2000b) A kinematic study of suction feeding and associated behaviour in the long-finned pilot whale, Globicephala melas (Traill). Mar Mamm Sci 16:299–314. doi: 10.1111/j.1748-7692.2000.tb00926.x CrossRefGoogle Scholar
  32. Werth AJ (2006a) Mandibular and dental variation and the evolution of suction feeding in Odontoceti. J Mamm 87:579–588. doi: 10.1644/05-MAMM-A-279R1.1 CrossRefGoogle Scholar
  33. Werth A (2006b) Odontocete suction feeding: experimental analysis of water flow and head shape. J Morphol 267:1415–1428. doi: 10.1002/jmor PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • David P. Hocking
    • 1
    • 2
    Email author
  • Alistair R. Evans
    • 1
  • Erich M. G. Fitzgerald
    • 2
  1. 1.School of Biological SciencesMonash UniversityMelbourneAustralia
  2. 2.GeosciencesMuseum VictoriaMelbourneAustralia

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