Natural and human-induced predation on Cape Cormorants at Dyer Island

Bird Conservation International

Volumn 22, Issue 1, 2012, Pages 82-93

  Voorbergen, Anne ^a   De Boer, Willem F ^a   Underhill, Les G ^b  

^a WAGENINGEN UNIVERSITY   (Netherlands)

^b UNIVERSITY OF CAPE TOWN   (South Africa)

Author keywords

[No Author keywords available]

Indexed keywords

ANTHROPOGENIC EFFECT; BREEDING POPULATION; CONSERVATION MANAGEMENT; DISTURBANCE; ENDANGERED SPECIES; HUMAN ACTIVITY; MORTALITY; PREDATION; PREDATOR-PREY INTERACTION; REPRODUCTIVE SUCCESS; SEABIRD; VULNERABILITY;

DYER ISLAND; SOUTH AFRICA; WESTERN CAPE;

ARCTOCEPHALUS PUSILLUS PUSILLUS; AVES; LARUS DOMINICANUS; PHALACROCORACIDAE; PHALACROCORAX CAPENSIS;

EID: 84858816860     PISSN: 09592709     EISSN: 14740001     Source Type: Journal    
DOI: 10.1017/S0959270912000032     Document Type: Article

References (39)

1. Ahlund, M. and Gotmark, F. (1989) Gull predation on eider ducklings Somateria mollissima, effects of human disturbance. Biol. Conserv. 48: 115-127.
2. Albores-Barajas, Y. V., Soldatini, C. and Furness, R. W. (2009) Are burrow nesting seabird chicks affected by human disturbance? Waterbirds 32: 572-578.
3. Barnes, K. N. (2000) The Eskom Red Data Book of birds of South Africa, Lesotho and Swaziland. Johannesburg: BirdLife South Africa.
4. Bellefleur, D., Lee, P. and Ronconi, R. A. (2009) The impact of recreational boat traffic on Marbled Murrelets (Brachyramphus mamoratus). J. Environ. Manage. 90: 531-538.
5. Bergman, G. (1982) Population dynamics, colony formation and competition in Larus argentatus, fuscus and marinus in the archipelago of Finland. Ann. Zool. Fenn. 19: 143-164.
6. Berry, H. H. (1976) Physiological and behavioural ecology of the Cape Cormorant Phalacrocorax capensis. Madoqua 9: 5-55.
7. Burger, J. and Gochfeld, M. (1991) The Common Tern: Its breeding biology and social behavior. New York: Columbia University Press.
8. Clode, D. (1993) Colonially breeding seabirds -predators or prey. Trends Ecol. Evol. 8: 336-338.
9. Crawford, R. J. M. (2005) The Cape cormorant. Roberts' birds of southern Africa. 7th edition. Cape Town: John Voelcker Bird Book Fund.
10. Darling, F. F. (1938) Bird flocks and the breeding cycle. Cambridge, UK: Cambridge University Press.
11. David, J. H. M., Cury, P., Crawford, R. J. M., Randall, R. M., Underhill, L. G. and Meyer, M. A. (2003) Assessing conservation priorities in the Benguela ecosystem, South Africa: Analysing predation by seals on threatened seabirds. Biol. Conserv. 114: 289-292.
12. du Toit, M., Bartlett, P. A., Bester, M. N. and Roux, J.-P. (2004) Seabird predation by individual seals at Ichaboe Island, Namibia. S. Afr. J. Wildl. Res. 34: 45-54.
13. Duffy, D. C. (1983) The foraging ecology of Peruvian seabirds. Auk 100: 800-810.
14. Galeotti, P., Tavecchia, G. and Bonetti, G. (2000) Parental defence in Long-eared Owls Asio otus: Effects of breeding stage, parent sex and human persecution. J. Avian Biol. 31: 431-440.
15. Gaston, A. J. (2004) Seabirds. A natural history. London: T & A D Poyser.
16. Hockey, P. A. R. (1980) Kleptoparasitism by Kelp Gulls Larus dominicanus of African Black Oystercatchers Haematopus mochini. Cormorant 8: 97-98.
17. IUCN (2009) IUCN Red List of threatened species. Version 2009.1.
18. Johnson, R. L., Venter, A., Bester, M. N. and Oosthuizen, W. H. (2006) Seabird predation by white shark, Carcharodon carcharifas, and Cape fur seal, Arctocephalus pusillus pusillus, at Dyer Island. S. Afr. J. Wildl. Res. 36: 23-32.
19. Kihlman, J. and Larsson, L. (1974) On the importance of refuse dumps as a food source for wintering Herring Gulls Larus argentatus Pont. Ornis Scand. 5: 63-70.
20. Kilpi, M. and Ost, M. (1998) Reduced availability of refuse and breeding output in a herring gull (Larus argentatus) colony. Annal. Zool. Fenn. 35: 37-42.
21. Kirkman, S. P., ed. (2007) Final report of BLCME (Benguela Current Large Marine Ecosystem) Project on top predators as biological indicators of ecosystem change in the BCLME. Cape Town: Avian Demography Unit.
22. Makhado, A. B. (2009) Investigation of the impact of fur seals on the conservation status of seabirds at islands off South Africa and at the Prince Edward Islands. PhD Thesis. University of Cape Town, Department of Zoology.
23. Makhado, A. B., Crawford, R. J. M. and Underhill, L. G. (2006) Impact of predation by Cape fur seals Arctocephalus pusillus pusillus on Cape gannets Morus capensis at Malgas Island, Western Cape, South Africa. Afr. J. Mar. Sci. 28: 681-687.
24. Marks, M. A., Brooke, R. K. and Gildenhuys, A. M. (1997) Cape fur seal (Arctocephalus pusillus pusillus) predation on Cape cormorants (Phalacrocorax capensis) and other birds at Dyer Island, South Africa. Mar. Ornithol. 25: 9-12.
25. Navarro, R. A. (2000) Cape fur seal predation on Cape Gannet fledglings. Bird Numbers 9: 15-16.
26. Oro, D. (1996) Colonial seabird nesting in dense and small sub-colonies: An advantage against aerial predation. Condor 98: 848-850.
27. R Development Core Team (2011) R: A language and environment for statistical computing. Version 2.9.2 Vienna, Austria: R Foundation for Statistical Computing.
28. Pons, J. M. (1992) Effects of changes in the availability of human refuse on breeding parameters in a herring gull (Larus argentatus) population in Brittany, France. Ardea 80: 143-150.
29. Quintana, F. and Yorio, P. (1999) Kleptoparasitism by Kelp Gulls on Royal and Cayenne Terns at Punta Leon, Argentina. J. Field Ornithol. 70: 337-342.
30. Schreiber, E. A. and Burger, J. (2002) Biology of marine birds. Florida: CRC Press LLC.
31. Shaughnessy, P. D. (1980) Influence of Cape fur seals on Jackass Penguin numbers at Sinclair Island. S. Afr. J. Wildl. Res. 10: 18-21.
32. Steele, W. K. (1992) Diet of Hartlaub's gull Larus hartlaubii and the Kelp gull Larus dominicanus in the southwestern Cape province, South Africa. Ostrich 63: 68-82.
33. Underhill, L. G. (2006) Seabird sites in southern Africa. Dyer Island. Cape Town: Animal Demography Unit.
34. van der Lingen, C. D., Coetzee, J. C., Demarcq, H., Drapeau, L., Fairweather, T. P. and Hutchings, L. (2005) An eastward shift in the distribution of southern Benguela sardine. GLOBEC International Newsletter 11: 17-22.
35. Waller, L. J. and Underhill, L. G. (2007) Management of avian cholera Pasteurella multocida outbreaks on Dyer Island, South Africa, 2002-2005. Afr. J. Mar. Sci. 29: 105-111.
36. Ward, P. and Zahavi, A. (1973) The importance of certain assemblages of birds as "Information Centers" for food finding. Ibis 115: 517-534.
37. Williams, A. J. and Ward, V. L. (2006) Sacred Ibis and Gray Heron predation of CapeCormorant eggs and chicks; and a review of ciconiiform birds as seabird predators. Waterbirds 29: 321-327.
38. Williams, A. J., Dyer, B. M., Randall, R. M., and Komen, J. (1990) Killer whales Orcinus orca and seabirds: 'play', predation and association. Mar. Ornith. 18: 37-41.
39. Weston, M. A. and Elgar, M. A. (2005) Parental care in Hooded Plovers (Thinornis rubricollis). Emu 105: 283-292.