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Polar Biology

, Volume 42, Issue 2, pp 385–394 | Cite as

Diet of the Brown Skua (Stercorarius antarcticus lonnbergi) at Hope Bay, Antarctic Peninsula: differences between breeders and non-breeders

  • Paloma Borghello
  • Diego Sebastián Torres
  • Diego Montalti
  • Andrés Esteban IbañezEmail author
Original Paper

Abstract

Top predators exhibit a critical role in ecosystem functioning and in the stability of the food web, so research on diet is relevant to understand their foraging behavior. Seasonal variation in diet and prey selection may be the result of fluctuations in the physiological demands during the different annual life cycles, and ecological factors such as resource availability, which may influence the foraging behavior. Moreover, the competition for the feeding territories between conspecifics in a population or with other predators may also lead to diversification of the diet. In this work, we determined the diet of breeding and non-breeding Brown Skuas (Stercorarius antarcticus lonnbergi) at Hope Bay, Antarctic Peninsula, to understand prey selection and the feeding habits of groups with different physiological and energy demands. To assess the breeders’ diet, 204 pellets were collected near the nests, while for non-breeders, 330 pellets were obtained from different areas where they usually group, and prey items were determined. Pellet dimensions were larger in non-breeding skuas. Breeding skuas’ pellets showed a higher content of energy-rich items such as penguin eggs, fishes and molluscs, while in non-breeding skuas, pellets consisted mainly of penguin feathers and bones. The differences in diet between the groups may be a consequence of the supplementation of the food obtained on land by traveling to the ocean by breeding skuas, in order to compensate the energetic demands during reproduction. Our results highlight differences in the feeding habits and prey selection, as well as a variation in the flexibility of the foraging strategy of both groups.

Keywords

Brown Skua (Stercorarius antarcticus lonnbergiBreeding Non-breeding Diet Pellets Antarctica 

Notes

Acknowledgements

This work was made possible thanks to the Instituto Antártico Argentino (IAA), which provided logistical support and permission to carry out the fieldwork at Bahía Esperanza/Hope Bay, Antarctic Peninsula. This work was supported by Proyecto de Investigación Plurianual (PIP- CONICET no 0158) and Agencia Nacional de Promoción Científica y Tecnológica and Instituto Antártico Argentino (PICTA-2010-0080) (To DM), and  partially supported by (PICT-2014-3323) (to AEI). Special thanks to Facundo Xavier Palacio for help with statistical analysis, as well as to the Editor and reviewers for their interesting and helpful criticisms for improvement of the manuscript.

Compliance with ethical standards

Conflicts of interest

No conflict of interests exists between the authors of this work.

Ethical approval

The protocol of ethical conditions under which this research was carried out was approved by the Program of Environmental Management and Tourism (Argentine Antarctic Institute, Argentine Ministry of Foreign, International Commerce and Worship).

References

  1. Barrett RT, Camphuysen CJ, Anker-Nilssen T, Chardine JW, Furness RW, Garthe S, Huppop O, Leopold MF, Montevecchi WA, Veit RR (2007) Diet studies of seabirds: a review and recommendations. ICES J Mar Sci 64:1675–1691CrossRefGoogle Scholar
  2. Bolnick DI, Svanback R, Fordyce JA, Yang LH, Davis JM, Hulsey CD, Forister ML (2003) The ecology of individuals: incidence and implications of individual specialization. Am Nat 161:1–28CrossRefGoogle Scholar
  3. Braak Ter CJ (1986) Canonical correspondence analysis: a new eigen vector technique for multivariate direct gradient analysis. Ecology 67:1167–1179CrossRefGoogle Scholar
  4. Burton RW (1968) Breeding biology of the brown Skua Catharacta skua lonnbergi (Mathews), at Signy Island, Soth Orkney Islands. Br Antarct Surv Bull 15:9–28Google Scholar
  5. Carneiro APB, Manica A, Phillips RA (2014) Foraging behaviour and habitat use by brown skuas Stercorarius lonnbergi breeding at South Georgia. Mar Biol 161:1755–1764CrossRefGoogle Scholar
  6. Carneiro APB, Manica A, Trivelpiece WZ, Phillips RA (2015) Flexibility in foraging strategies of Brown Skuas in response to local and seasonal dietary constraints. J Ornithol 156:625–633CrossRefGoogle Scholar
  7. Colwell RK, Futuyma DJ (1971) On the measurements of Niche breadth and overlap. Ecology 52:567–576CrossRefGoogle Scholar
  8. Coria NR, Montalti D (1993) Flying birds at Esperanza Bay, Antarctica. Polish Polar Res 14:433–439Google Scholar
  9. De Villa-Meza A, Martínez Meyer E, López González C (2002) Ocelot (Leopardus pardales) food habits in a tropical deciduous forest of Jalisco, México. Am Midl Nat 148:146–154CrossRefGoogle Scholar
  10. Devillers P (1978) Distribution and relationships of South American Skuas. Gerfaut 68:374–417Google Scholar
  11. Furness RW (1987) The skuas. Poyser, CaltonGoogle Scholar
  12. Furness RW, Camphuysen CJ (1997) Seabirds as monitors of the marine environment. ICES J Mar Sci 54:726–737CrossRefGoogle Scholar
  13. González-Solís J, Croxall JP, Afanasyev V (2007) Offshore spatial segregation in giant petrels Macronectes spp.: Differences between species, sexes and seasons. Aquat Conserv 17:22–36CrossRefGoogle Scholar
  14. Graña Grilli M (2015) Uso del espacio, dieta y estado corporal del skua pardo (Stercorarius antarcticus lonnbergi) durante su período reproductivo en Antártida. Dissertation, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La PlataGoogle Scholar
  15. Graña Grilli M, Marti LJ, Montalti D (2014) Uniformity of diet composition of Brown Skuas at different ages and between siblings. Rev Bras Ornitol 22:265–269Google Scholar
  16. Graña Grilli M, Montalti D (2012) Trophic interactions between Brown and South Polar Skuas at Deception Island, Antarctica. Polar Biol 35:299–304CrossRefGoogle Scholar
  17. Graña Grilli M, Montalti D (2015) Variation in diet composition during the breeding cycle of an Antarctic seabird in relation to its breeding chronology and that of its main food resource. Polar Biol 38:643–649CrossRefGoogle Scholar
  18. Gustafsson L, Nordling D, Andersson MS, Sheldon BC, Quarnstrøm A (1994) Infectious disease, reproductive effort and the cost of reproduction in birds. Philos Trans R Soc Lond B 346:323–331CrossRefGoogle Scholar
  19. Hahn S, Peter HU (2003) Feeding territoriality and the reproductive consequences in brown skuas Catharacta antarctica lonnbergi. Polar Biol 26:552–559CrossRefGoogle Scholar
  20. Hahn S, Reinhardt K, Ritz MS, Janicke T, Montalti D, Peter H-U (2007) Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas. Mar Ecol Prog Ser 334:287–297CrossRefGoogle Scholar
  21. Hanssen SA, Hasselquist D, Folstad I, Erikstad KE (2005) Cost of reproduction in a long-lived bird: incubation effort reduces immune function and future reproduction. Proc R Soc Lond B 272:1039–1046CrossRefGoogle Scholar
  22. Hetch T (1987) A guide to the otoliths of Southern Ocean fishes. S Afr J Antarct Res 17:1–87Google Scholar
  23. Hipfner JM, McFarlane-Tranquilla L, Addison B, Hobson KA (2013) Trophic responses to the hatching of offspring in a central- place foraging seabird. J Ornithol 154:965–970CrossRefGoogle Scholar
  24. Jakubas D, Iliszko LM, Strøm H, Helgason HH, Stempniewicz L (2018) Flexibility of foraging strategies of the great skua Stercorarius skua breeding in the largest colony in the Barents Sea region. Front Zool 15:9CrossRefGoogle Scholar
  25. Krebs CJ (1989) Ecological methodology. HarperCollins, New YorkGoogle Scholar
  26. Krietsch J, Hahn S, Kopp M, Phillips RA, Peter HU, Lisovski S (2017) Consistent variation in individual migration strategies of Brown Skuas. Mar Ecol Prog Ser 578:213–225CrossRefGoogle Scholar
  27. Mackley EK, Phillips RA, Silk JRD, Wakefield ED, Afanasyev V, Furness RW (2011) At-sea activity patterns of breeding and nonbreeding white-chinned petrels Procellaria aequinoctialis from South Georgia. Mar Biol 158:429–438CrossRefGoogle Scholar
  28. Malzof SL, Quintana RD (2008) Diet of the south polar skua Catharacta maccormicki and the brown skua C. antarctica lonnbergi at Cierva Point Antarctic Peninsula. Polar Biol 31:827–835CrossRefGoogle Scholar
  29. McLeay LJ, Page B, Goldsworthy SD, Paton DC, Teixeira C, Burch P, Ward T (2010) Foraging behaviour and habitat use of a short-ranging seabird, the crested tern. Mar Ecol-Prog Ser 411:271–283CrossRefGoogle Scholar
  30. Moncorps S, Chapuis JL, Haubreux Bretagnolle V (1998) Diet of the Brown Skua Catharcta skua lönnbergi on the Kerguelen Archipelago: comparisons between techniques and between islands. Polar Biol 19:9–16CrossRefGoogle Scholar
  31. Montalti D (2005) Morfología y biología reproductiva de las especies del género Catharacta (Aves, Stercorariidae) de la Antártida. PhD Dissertation, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La PlataGoogle Scholar
  32. Mougeot F, Genevois F, Bretagnolle V (1998) Predation on burrowing petrels by the brown skua (Catharacta skua lonnbergi) at Mayes Island, Kerguelen. J Zool 244:429–438Google Scholar
  33. Navarro J, Louzao M, Igual JM, Oro D, Delgado A, Arcos JM, Genovart M, Hobson KA, Forero MG (2009) Seasonal changes in the diet of a critically endangered seabird and the importance of trawling discards. Mar Biol 156:2571–2578CrossRefGoogle Scholar
  34. Norman FI, Ward SJ (1990) Foods of the south polar skua at Hop Island, Rauer Group, East Antarctica. Polar Biol 10:489–493CrossRefGoogle Scholar
  35. Oksanen J, Blanchet FG, Kindt R, Legendre P, Minchin PR (2015) O’hara RB, Simpson GL, Solymos P, Stevens MHH, Wagner H (2015) vegan: community ecology package. R package version 2:1–2Google Scholar
  36. Phillips R, Catry P, Silk J, Bearhop S, McGill R, Afanasyev V, Strange I (2007) Movements, winter distribution and activity patterns of Falkland and Brown Skuas: insights from loggers and isotopes. Mar Ecol Prog Ser 345:281–291CrossRefGoogle Scholar
  37. Phillips RA, Lewis S, González-Solís J, Daunt F (2017) Causes and consequences of individual variability and specialization in foraging and migration strategies of seabirds. Mar Ecol Progr Ser 578:117–150CrossRefGoogle Scholar
  38. Phillips RA, Phalan B, Forster I (2004a) Diet and long-term changes in population size and productivity of brown skuas Catharacta antarctica lonnbergi at Bird Island, South Georgia. Polar Biol 27:555–561CrossRefGoogle Scholar
  39. Phillips RA, Silk JRD, Phalan B, Catry P, Croxall JP (2004b) Seasonal sexual segregation in two Thalassarche albatross species: competitive exclusion, reproductive role specialization or trophic niche divergence? Proc R Soc Lond B 271:1283–1291CrossRefGoogle Scholar
  40. Pietz PJ (1987) Feeding and nesting ecology of sympatric South Polar and Brown Skuas. Auk 104:617–627Google Scholar
  41. Quintana RD, Cirelli V, Orgeira JL (2000) Abundance and spatial distribution of bird populations at Cierva Point, Antarctic Peninsula. Mar Ornithol 28:21–27Google Scholar
  42. R Core Team 2015 R: a language and environment for statistical computing R foundation for statistical computing Viena https://www.R-project.org/
  43. Reid K (1996) A guide to the use of otoliths in the study of predators at South Georgia. British Antarctic Survery, CambridgeGoogle Scholar
  44. Reinhardt K, Hahn S, Peter HU, Wemhoff H (2000) A review of the diets of Southern Hemisphere skuas. Mar Ornithol 28:7–19Google Scholar
  45. Ritz M, Millar C, Miller G, Phillips R, Ryan P, Sternkopf V, Liebers-Helbig D, Hans-Ulrich P (2008) Phylogeography of the southern Skua complex- rapid colonization of the southern hemisphere during a glacial period and reticulate evolution. Mol Phylogenet Evol 49:292–303CrossRefGoogle Scholar
  46. Ryan PG, Moloney CL (1991) Prey selection and temporal variation in the diet of Subantarctic Skuas at Inaccessible Island, Tristan da Cunha. Ostrich 62:52–58CrossRefGoogle Scholar
  47. Ryan PG, Whittington PA, Crawford RJM (2009) A tale of two islands: contrasting fortunes for subantarctic skuas at the Prince Edward Islands. Afr J Mar Sci 31:431–437CrossRefGoogle Scholar
  48. Santos MM, Hinke JT, Coria NR, Fusaro B, Silvestro A, Juáres MA (2018) Abundance estimation of Adélie penguins at the Esperanza/Hope Bay mega colony. Polar Biol 41:2337–2342CrossRefGoogle Scholar
  49. Shaffer SA, Costa DP, Weimerskirch H (2003) Foraging effort in relation to the constraints of reproduction in free-ranging albatrosses. Funct Ecol 17:66–74CrossRefGoogle Scholar
  50. Trillmich F (1978) Feeding territories and breeding success of South polar skuas. Auk 95:23–33CrossRefGoogle Scholar
  51. Trivelpiece W, Butler RG, Volkman NJ (1980) Feeding territories of brown skuas (Catharacta lonnbergi). Auk 97:669–676Google Scholar
  52. Trivelpiece W, Volkman NJ (1982) Feeding strategies of sympatric south polar Catharacta maccormicki and brown skuas C. lonnbergi. Ibis 124:50–54CrossRefGoogle Scholar
  53. Votier SC, Bearhop S, MacCormick A, Ratcliffe N, Furness RW (2003) Assessing the diet of great skuas, Catharacta skua, using five different techniques. Polar Biol 26:20–26Google Scholar
  54. Votier SC, Bearhop S, Ratcliffe N, Furness RW (2002) Pellets as indicators of diet in Great Skuas Catharacta skua. Bird Study 48:373–376CrossRefGoogle Scholar
  55. Weimerskirch H, Prince PA, Zimmermann L (2000) Chick provisioning by the Yellow-nosed Albatross Diomedea chlororhynchos: response of foraging effort to experimentally increased costs and demands. Ibis 142:103–110CrossRefGoogle Scholar
  56. Williams TD (2018) Nutrition and reproduction, birds. Encyclopedia of reproduction, vol 6, 2nd edn. Elsevier, pp 749–756Google Scholar
  57. Young EC (1963) Feeding habits of the south polar skua Catharacta maccormicki. Ibis 105:301–318CrossRefGoogle Scholar
  58. Young E (1994) Skua and penguin: predator and prey. Cambridge University Press, CambridgeCrossRefGoogle Scholar
  59. Young EC, Jenkins PE, Douglas ME, Lovegrove TG (1988) Nocturnal foraging by Chatham Island skuas. NZ J Ecol 11:113–117Google Scholar
  60. Young EC, Millar CD (1999) Skua (Catharacta sp.) foraging behaviour at the Cape Crozier Adélie Penguin (Pygoscelis adeliae) colony, Ross Island, Antarctica, and implications for breeding. Notornis 46:287–297Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Paloma Borghello
    • 1
  • Diego Sebastián Torres
    • 1
  • Diego Montalti
    • 1
    • 2
  • Andrés Esteban Ibañez
    • 1
    Email author
  1. 1.Sección Ornitología, Div. Zool. Vert., Museo de La Plata (FCNyM-UNLP, CONICET)Buenos AiresArgentina
  2. 2.Instituto Antártico Argentino (IAA)Buenos AiresArgentina

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