Estes J, Tinker M, Williams T, Doak D (1998) Killer whale predation on sea otters linking oceanic and nearshore ecosystems. Science 282:473–476
Article
CAS
PubMed
Google Scholar
Williams T, Estes J, Doak D, Springer A (2004) Killer appetites: assessing the role of predators in ecological communities. Ecology 85:3373–3384
Article
Google Scholar
Estes JA, Terborgh J, Brashares JS, Power ME, Berger J, Bond WJ et al (2011) Trophic downgrading of planet earth. Science 333:301–306
Article
CAS
PubMed
Google Scholar
Laws R (1984) Seals. In: Laws RM (ed) Antarctic ecology, vol II. Academic Press, Cambridge, pp 621–716
Google Scholar
Boveng P, Hiruki L, Schwartz M, Bengtson J (1998) Population growth of Antarctic fur seals: limitation by a top predator, the leopard seal? Ecology 79:2863–2877
Article
Google Scholar
Schwarz LK, Goebel ME, Costa DP, Kilpatrick AM (2013) Top-down and bottom-up influences on demographic rates of Antarctic fur seals Arctocephalus gazella. J Anim Ecol 82:903–911
Article
PubMed
Google Scholar
Kooyman GL, Croll D, Stone S, Smith S (1990) Emperor penguin colony at Cape Washington, Antarctica. Polar Record 26:103–108
Article
Google Scholar
Ainley DG, Ballard G, Karl BJ, Dugger KM (2005) Leopard seal predation rates at penguin colonies of different size. Antarct Sci 17:335–340
Article
Google Scholar
Ballard WB, Carbyn LN, Smith DW (2003) Wolf interactions with non-prey. In: Mech LD, Smith DW (eds) Wolves: behavior, ecology and conservation. The University of Chicago Press, Chicago, pp 259–271
Google Scholar
Creel S, Christianson D, Liley S, Winnie JA (2007) Predation risk affects reproductive physiology and demography of Elk. Science 315:960
Article
CAS
PubMed
Google Scholar
Creel S, Christianson D (2008) Relationships between direct predation and risk effects. Trends Ecol Evol 23:194–201
Article
PubMed
Google Scholar
Wirsing AJ, Heithaus MR, Frid A, Dill LM (2008) Seascapes of fear: evaluating sublethal predator effects experienced and generated by marine mammals. Mar Mamm Sci 24:1–15
Article
Google Scholar
Walker T, Boyd I, McCafferty D, Taylor R, Reid K (1998) Seasonal occurrence and diet of leopard seals (Hydrurga leptonyx) at Bird Island, South Georgia. Antarct Sci 10:75–81
Article
Google Scholar
Casaux R, Baroni A, Ramón A, Carlini A, Bertolin M, DiPrinzio C (2009) Diet of the leopard seal (Hydrurga leptonyx) at the Danco Coast, Antarctic Peninsula. Polar Biol 32:307–310
Article
Google Scholar
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 Verlag, Berlin, pp 555–560
Chapter
Google Scholar
Green K, Williams R (1986) Observations on food remains in faeces of elephant, leopard and crabeater seals. Polar Biol 6:43–45
Article
Google Scholar
Hiruki L, Schwartz M, Boveng P (1999) Hunting and social behaviour of leopard seals (Hydrurga leptonyx) at Seal Island, South Shetland Islands, Antarctica. J Zool 249:97–109
Article
Google Scholar
Vera C, Vargas R, Torres DN (2005) Estrategias depredatorias del la foca leopardo sobre cachorros de lobo fino Antarctico. Boletin Antarctico Chileno 24:12–17
Google Scholar
Penney RL, Lowry G (1967) Leopard seal predation of adelie penguins. Ecology 48:878–882
Article
Google Scholar
Kooyman GL (1965) Leopard seals of Cape Crozier. Animals 6:58–63
Google Scholar
Rogers T, Bryden MM (1995) Predation of Adélie penguins (Pygoscelis adeliae) by leopard seals (Hydrurga leptonyx) in Prydz Bay, Antarctica. Can J Zool 73:1001–1004
Article
Google Scholar
Muller-Schwarze D, Muller-Schwarze C (1975) Relations between leopard seals and Adélie penguins. Rapports et Proces-Verbaux des Reunions du Conseil Permanent International pour l’Exploration de la Mer 169:394–404
Google Scholar
Bertram BCR (1979) Serengeti predators and their social systems. In: Sinclair ARE, Norton-Griffiths M (eds) Serengeti: dynamics of an ecosystem. The University of Chicago Press, Chicago, pp 221–248
Google Scholar
Macdonald DW (1983) The ecology of carnivore social behaviour. Nature 301:379–384
Article
Google Scholar
Wilmers CC, Crabtree RL, Smith DW, Murphy KM, Getz WM (2003) Trophic facilitation by introduced top predators: grey wolf subsidies to scavengers in Yellowstone National Park. J Anim Ecol 72:909–916
Article
Google Scholar
Kruuk H (1975) Functional aspects of social hunting by carnivores. In: Baerends G, Beer C, Manning A (eds) Function and evolution in behaviour. Oxford University Press, Oxford, pp 119–141
Google Scholar
Gittleman JL (1989) Carnivore group living: comparative trends. In: Gittleman JL (ed) Carnivore behavior, ecology, and evolution. Cornell University Press, Ithaca, NY, pp 183–207
Creel S, Creel NM (1995) Communal hunting and pack size in African wild dogs, Lycaon pictus. Anim Behav 50:1325–1339
Article
Google Scholar
Mech LD, Peterson R (2003) Wolf–prey relations. In: Mech LD, Boitani L (eds) Wolves: behavior, ecology, and conservation: behavior, ecology, and conservation. University of Chicago Press, Chicago, pp 131–160
Chapter
Google Scholar
Palomares F, Caro TM (1999) Interspecific killing among mammalian carnivores. Am Nat 153:492–508
Article
Google Scholar
Murphy KM, Felzien GS, Hornocker MG, Ruth TK (1998) Encounter competition between bears and cougars: some ecological implications. Ursus 10:55–60
Google Scholar
Schoener TW (1983) Field experiments on interspecific competition. Am Nat 122:240–285
Article
Google Scholar
Townsend CR, Begon M, Harper JL (2008) Essentials of ecology. Wiley-Blackwell Publishing, Malden
Google Scholar
Wilson EA (1905) On the whales, seals and birds of Ross Sea and South Victoria Land. In: Scott R (ed) The voyage of the ‘discovery’, vol II. Charles Scribner’s Sons, New York, pp 469–494
Google Scholar
Southwell C, Paxton CGM, Borchers D, Boveng P, Rogers T, de la Mare WK (2008) Uncommon or cryptic? Challenges in estimating leopard seal abundance by conventional but state-of-the-art methods. Deep Sea Res Part I 55:519–531
Article
Google Scholar
Gilbert J, Erickson A (1977) Distribution and abundance of seals in the pack ice of the Pacific sector of the Southern Ocean. In: Llano A (ed) Adaptations within Antarctic ecosystems. Smithsonian Institution, Washington, DC, pp 703–740
Rogers TL, Bryden MM (1997) Density and haul-out behavior of leopard seals (Hydrurga leptonyx) in Prydz Bay, Antarctica. Mar Mamm Sci 13:293–302
Article
Google Scholar
Rogers TL, Hogg CJ, Irvine A (2005) Spatial movement of adult leopard seals (Hydrurga leptonyx) in Prydz Bay, Eastern Antarctica. Polar Biol 28:456–463
Article
Google Scholar
Bester MN, Ferguson JWH, Jonker FC (2002) Population densities of pack ice seals in the Lazarev Sea, Antarctica. Antarct Sci 14:123–127
Article
Google Scholar
Meredith MP, King JC (2005) Rapid climate change in the ocean west of the Antarctic Peninsula during the second half of the 20th century. Geophys Res Lett 32:L19604
Google Scholar
Vaughan D, Marshall G, Connolley W, Parkinson C, Mulvaney R, Hodgson D et al (2003) Recent rapid regional climate warming on the Antarctic Peninsula. Clim Change 60:243–274
Article
Google Scholar
Vaughan D (2006) Recent trends in melting conditions on the Antarctic peninsula and their implications for ice-sheet mass balance and sea level. Arct Antarct Alp Res 38:147–152
Article
Google Scholar
Forcada J, Trathan PN, Boveng PL, Boyd IL, Burns JM, Costa DP et al (2012) Responses of Antarctic pack-ice seals to environmental change and increasing krill fishing. Biol Conserv 149:40–50
Article
Google Scholar
Marshall G (1990) A video-collar to study aquatic fauna: a view from the animal’s back. In: Reed D (ed) Spirit of enterprise: the 1990 rolex awards. Rolex, Geneva, Switzerland, pp 57–59
Parrish FA, Marshall GJ, Littnan CL, Heithaus MR, Canja S, Becker B et al (2005) Foraging of juvenile monk seals at French Frigate Shoals, Hawaii. Mar Mamm Sci 21:93–107
Article
Google Scholar
Parrish FA, Craig MP, Ragen TJ, Marshall GJ, Buhleier BM (2000) Identifying diurnal foraging habitat of endangered Hawaiian monk seals using a seal-mounted video camera. Mar Mamm Sci 16:392–412
Article
Google Scholar
Parrish FA, Abernathy K, Marshall GJ, Buhleier BM (2002) Hawaiian monk seals (Monachus schauinslandi) foraging in deep-water coral beds. Mar Mamm Sci 18:244–258
Article
Google Scholar
Bowen W, Tully D, Boness D, Bulheier B, Marshall GJ (2002) Prey-dependent foraging tactics and prey profitability in a marine mammal. Mar Ecol Prog Ser 244:235–245
Article
Google Scholar
Heaslip SG, Bowen WD, Iverson SJ (2014) Testing predictions of optimal diving theory using animal-borne video from harbour seals (Phoca vitulina concolor). Can J Zool 92:309–318
Article
CAS
Google Scholar
Davis R, Fuiman L, Williams T, Collier S, Hagey W, Kanatous S et al (1999) Hunting behavior of a marine mammal beneath the Antarctic fast ice. Science 283:993
Article
CAS
PubMed
Google Scholar
Parrish FA, Marshall GJ, Buhleier B, Antonelis GA (2008) Foraging interaction between monk seals and large predatory fish in the Northwestern Hawaiian Islands. Endanger Species Res 4:299
Article
Google Scholar
Worton BJ (1989) Kernel methods for estimating the utilization distribution in home-range studies. Ecology 70:164–168
Article
Google Scholar
Austin D, Bowen WD, McMillan JI (2004) Intraspecific variation in movement patterns: modeling individual behaviour in a large marine predator. Oikos 105:15–30
Article
Google Scholar
McClintock BT, King R, Thomas L, Matthiopoulos J, McConnell BJ, Morales JM (2012) A general discrete-time modeling framework for animal movement using multistate random walks. Ecol Monogr 82:335–349
Article
Google Scholar
Freitas C, Kovacs K, Ims R, Fedak M, Lydersen C (2008) Ringed seal post-moulting movement tactics and habitat selection. Oecologia 155:193–204
Article
PubMed
Google Scholar
Lyons A, Turner W, Getz W (2013) Home range plus: a space–time characterization of movement over real landscapes. Mov Ecol 1:1–14
Article
Google Scholar
Rutz C, Hays GC (2009) New frontiers in biologging science. Biol Lett 5:289–292
Article
PubMed
PubMed Central
Google Scholar
Costa DP, Robinson PW, Arnould JPY, Harrison A-L, Simmons SE, Hassrick JL et al (2010) Accuracy of ARGOS locations of Pinnipeds at-sea estimated using Fastloc GPS. PLoS One 5:e8677
Article
PubMed
PubMed Central
CAS
Google Scholar
Dujon AM, Lindstrom RT, Hays GC (2014) The accuracy of Fastloc-GPS locations and implications for animal tracking. Methods Ecol Evol 5:1162–1169
Article
Google Scholar
Tomkiewicz SM, Fuller MR, Kie JG, Bates KK (2010) Global positioning system and associated technologies in animal behaviour and ecological research. Philos Trans R Soc B Biol Sci 365:2163–2176
Article
Google Scholar
Kie JG, Matthiopoulos J, Fieberg J, Powell RA, Cagnacci F, Mitchell MS et al (2010) The home-range concept: are traditional estimators still relevant with modern telemetry technology? Philos Trans R Soc B Biol Sci 365:2221–2231
Article
Google Scholar
Getz WM, Wilmers CC (2004) A local nearest-neighbor convex-hull construction of home ranges and utilization distributions. Ecography 27:489–505
Article
Google Scholar
Dayton PK, Mordida BJ, Bacon F (1994) Polar marine communities. Am Zool 34:90–99
Article
Google Scholar
Orsi AH, Whitworth T III, Nowlin WD Jr (1995) On the meridional extent and fronts of the Antarctic circumpolar current. Deep Sea Res Part I 42:641–673
Article
Google Scholar
Atkinson A, Siegel V, Pakhomov EA, Jessopp MJ, Loeb V (2009) A re-appraisal of the total biomass and annual production of Antarctic krill. Deep Sea Res Part I 56:727–740
Article
Google Scholar
Agnew DJ (1997) Review—the CCAMLR ecosystem monitoring programme. Antarct Sci 9:235–242
Article
Google Scholar
Goebel ME, Pussini N, Buchheit R, Pietrzak KW, Krause DJ, Van Cise AM et al (2011) AMLR 2010/11 field season report. Chapter 8: Pinniped Research at Cape Shirreff, Livingston Island, Antarctica. US Department of Commerce, NOAA Technical Memorandum NMFS-SWFSC-524, pp 50–57
Rogers TL, Ciaglia MB, Klinck H, Southwell C (2013) Density can be misleading for low-density species: benefits of passive acoustic monitoring. PLoS One 8:e52542
Article
CAS
PubMed
PubMed Central
Google Scholar
Erickson AW, Hofman RJ (1974) Antarctic seals. Antarctic Map Folio Series. Folio 18:4–13
Marshall G, Bakhtiari M, Shepard M (2007) An advanced solid-state animal-borne video and environmental data-logging device (“Crittercam”) for marine research. Mar Technol Soc J 41:31–38
Article
Google Scholar
Pussini N, Goebel ME (2015) A safter protocol for field immobilization of leopard seals (Hydrurga leptonyx). Mar Mamm Sci. doi:10.1111/mms.12232
Luque SP (2007) Diving behaviour analysis in R. R News 7:8–14
Google Scholar
Kruuk H (1972) The spotted hyena: a study of predation and social behavior. University of Chicago Press, Chicago
Google Scholar
Schaller GB (1972) The Serengeti lion: a study of predator–prey relations. University of Chicago Press, Chicago
Google Scholar
Taylor M (1989) Locomotor adaptations by carnivores. In: Gittleman J (ed) Carnivore behavior, ecology, and evolution. Cornell University Press, Ithaca, NY, pp 382–409
Van Orsdol KG (1984) Foraging behaviour and hunting success of lions in Queen Elizabeth National Park, Uganda. Afr J Ecol 22:79–99
Article
Google Scholar
Caro TM, Fitzgibbon CD (2009) Large carnivores and their prey: the quick and the dead. In: Crawley MJ (ed) Natural enemies: the population biology of predators, parasites and diseases. Blackwell Scientific Publications, Oxford, pp 115–142
Google Scholar
Hilborn A, Pettorelli N, Orme CDL, Durant SM (2012) Stalk and chase: how hunt stages affect hunting success in Serengeti cheetah. Anim Behav 84:701–706
Article
Google Scholar
Gon O, Heemstra PC (eds) (1990) Fishes of the southern ocean, 1st edn. JLB Smith Institute of Ichthyology, Grahamstown
Google Scholar
R-Core-Team (2014) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria
Freitas C (2012) argosfilter: Argos locations filter. R Foundation for Statistical Computing, Vienna, Austria
Lyons AJ, Getz WM (2014) T-LoCoH: time local convex hull homerange and time use analysis. R Foundation for Statistical Computing, Vienna, Austria
Lyons AJ (2014) T-LoCoH for R: tutorial and users guide, pp 2–53
Getz WM, Fortmann-Roe S, Cross PC, Lyons AJ, Ryan SJ, Wilmers CC (2007) LoCoH: nonparameteric kernel methods for constructing home ranges and utilization distributions. PLoS One 2:e207
Article
PubMed
PubMed Central
Google Scholar
Wickham H (2009) ggplot2: elegant graphics for data analysis. Springer, New York
Book
Google Scholar
Murray DL, Boutin S, O’Donoghue M, Nams VO (1995) Hunting behaviour of a sympatric felid and canid in relation to vegetative cover. Anim Behav 50:1203–1210
Article
Google Scholar
Stirling I (1974) Midsummer observations on the behavior of wild polar bears (Ursus maritimus). Can J Zool 52:1191–1198
Article
Google Scholar
Scantlebury DM, Mills MGL, Wilson RP, Wilson JW, Mills MEJ, Durant SM et al (2014) Flexible energetics of cheetah hunting strategies provide resistance against kleptoparasitism. Science 346:79–81
Article
CAS
PubMed
Google Scholar
Estes JA (1989) Adaptations for aquatic living by carnivores. In: Gittleman JL (ed) Carnivore behavior, ecology, and evolution. Cornell University Press, Ithaca, NY, pp 242–282
Mader TR (1998) Temporal variation in leopard seal presence and predation near an antarctic penguin rookery. Masters Thesis Montana State University, Biology
DeLaca T, Lipps J, Zumwalt G (1975) Encounters with Leopard seals (Hydrurga leptonyx) along the Antarctic Peninsula. Antarct J Unit States 10:85–91
Google Scholar
Rogers T (2009) The leopard seal, Hydrurga leptonyx. In: Perrin WF, Wursig B, Thewissen JGM (eds) Encyclopedia of marine mammals, 2nd edn. Academic Press, San Diego, pp 673–674
Kooyman GL (1981) Leopard seal (Hydrurga leptonyx Blainville, 1820). In: Ridgway S, Harrison R (eds) Handbook of marine mammals, vol 2. Academic Press, London, pp 261–272
Google Scholar
Ray C (1966) Snooping on seals for science. Anim Kingd 69:66–75
Google Scholar
Hocking D, Evans A, Fitzgerald EG (2013) Leopard seals (Hydrurga leptonyx) use suction and filter feeding when hunting small prey underwater. Polar Biol 36:211–222
Article
Google Scholar
Pitman RL, Durban JW (2012) Cooperative hunting behavior, prey selectivity and prey handling by pack ice killer whales (Orcinus orca), type B, in Antarctic Peninsula waters. Mar Mamm Sci 28:16–36
Article
Google Scholar
Pitman RL, Totterdell JA, Fearnbach H, Ballance LT, Durban JW, Kemps H (2015) Whale killers: prevalence and ecological implications of killer whale predation on humpback whale calves off Western Australia. Mar Mamm Sci 31(2):629–657
Article
Google Scholar
Estes JA, Riedman ML, Staedler MM, Tinker MT, Lyon BE (2003) Individual variation in prey selection by sea otters: patterns, causes and implications. J Anim Ecol 72:144–155
Article
Google Scholar
Staniland IJ, Reid K, Boyd IL (2004) Comparing individual and spatial influences on foraging behaviour in Antarctic fur seals Arctocephalus gazella. Mar Ecol Prog Ser 275:263–274
Article
Google Scholar
Weise MJ, Harvey JT, Costa DP (2010) The role of body size in individual-based foraging strategies of a top marine predator. Ecology 91:1004–1015
Article
PubMed
Google Scholar
Brockmann HJ, Barnard CJ (1979) Kleptoparasitism in birds. Anim Behav 27(Part 2):487–514
Creel S, Creel N (1996) Limitation of African wild dogs by competition with larger carnivores. Conserv Biol 10:526–538
Article
Google Scholar
Gorman ML, Mills MG, Raath JP, Speakman JR (1998) High hunting costs make African wild dogs vulnerable to kleptoparasitism by hyaenas. Nature 391:479–481
Article
CAS
Google Scholar
Krofel M, Kos I, Jerina K (2012) The noble cats and the big bad scavengers: effects of dominant scavengers on solitary predators. Behav Ecol Sociobiol 66:1297–1304
Article
Google Scholar
Iyengar EV (2008) Kleptoparasitic interactions throughout the animal kingdom and a re-evaluation, based on participant mobility, of the conditions promoting the evolution of kleptoparasitism. Biol J Linn Soc 93:745–762
Article
Google Scholar
Riedman ML, Estes JA (1988) A review of the history, distribution and foraging ecology of sea otters. In: VanBlaricom GR, Estes JA (eds) The community ecology of sea otters, vol 65. Springer, Berlin, pp 4–21
Chapter
Google Scholar
Creel S, Spong G, Creel N (2001) Interspecific competition and the population biology of extinction-prone carnivores. In: Gittleman JL, Funk SM, Macdonald DW, Wayne RK (eds) Carnivore conservation. Cambridge University Press, London, pp 35–60
Krofel M, Kos I (2010) Modeling potential effects of brown bear kleptoparasitism on the predation rate of Eurasian lynx. Acta Biologica Slovenica 53:47–54
Google Scholar
Kruuk H (1972) Surplus killing by carnivores. J Zool 166:233–244
Article
Google Scholar
Vander Wall SB (1990) Food hoarding in animals. University of Chicago Press, Chicago
Google Scholar
Andersson M, Krebs J (1978) On the evolution of hoarding behaviour. Anim Behav 26(Part 3):707–711
Smith CC, Reichman OJ (1984) The evolution of food caching by birds and mammals. Annu Rev Ecol Syst 15:329–351
Article
Google Scholar
Barrett-Lennard LG, Matkin CO, Durban JW, Saulitis EL, Ellifrit D (2011) Predation on gray whales and prolonged feeding on submerged carcasses by transient killer whales at Unimak Island, Alaska. Mar Ecol Prog Ser 421:229–241
Article
Google Scholar
Kim SL, Conlan K, Malone DP, Lewis CV (2005) Possible food caching and defence in the Weddell seal: observations from McMurdo Sound, Antarctica. Antarct Sci 17:71–72
Article
Google Scholar
Ponganis PJ, Stockard TK (2007) Short note: the Antarctic toothfish: how common a prey for Weddell seals? Antarct Sci 19:441–442
Article
Google Scholar
Wilson EE, Wolkovich EM (2011) Scavenging: how carnivores and carrion structure communities. Trends Ecol Evol 26:129–135
Article
PubMed
Google Scholar
Macdonald DW (1976) Food caching by red foxes and some other carnivores. Zeitschrift für Tierpsychologie 42:170–185
Article
CAS
PubMed
Google Scholar
Vander Wall SB, Jenkins SH (2003) Reciprocal pilferage and the evolution of food-hoarding behavior. Behav Ecol 14:656–667
Article
Google Scholar
Hamilton JE (1939) The leopard seal Hydrurga leptonyx (De Blainville). Discovery reports 18:239–264
DeVault TL, Rhodes JOE, Shivik JA (2003) Scavenging by vertebrates: behavioral, ecological, and evolutionary perspectives on an important energy transfer pathway in terrestrial ecosystems. Oikos 102:225–234
Article
Google Scholar
Borsa P (1990) Seasonal occurrence of the leopard seal, Hydrurga leptonyx, in the Kerguelen Islands. Can J Zool 68:405–408
Article
Google Scholar