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The eradication of feral cats from Ascension Island and its subsequent recolonization by seabirds

  • Norman Ratcliffe (a1), Mike Bell (a2), Tara Pelembe (a3), Dave Boyle (a2), Raymond Benjamin (a3), Richard White (a1), Brendan Godley (a4), Jim Stevenson (a1) and Sarah Sanders (a1)...
Abstract
Abstract

The introduction of mammal predators to islands often results in rapid declines in the number and range of seabirds. On Ascension Island the introduction of cats in 1815 resulted in extirpation of large seabird colonies from the main island, with relict populations of most species persisting only in cat-inaccessible locations. We describe the eradication of feral cats from this large and populated island. The campaign had to minimize risk to humans and maintain domestic animals in a state that prevented them re-establishing a feral population. Feral cat numbers declined rapidly in response to the strategic deployment of poisoning and live trapping, and cats were eradicated from the island within 2 years. During the project 38% of domestic cats were killed accidentally, which caused public consternation; we make recommendations for reducing such problems in future eradications. Since the completion of the eradication campaign cat predation of adult seabirds has ceased and five seabird species have recolonized the mainland in small but increasing numbers. Breeding success of seabirds at Ascension was low compared to that of conspecifics elsewhere, and the roles of food availability, inexperience of parent birds and black rat predation in causing this warrant further investigation. It is likely that the low breeding success will result in the rate of increase in seabird populations being slow.

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Corresponding author
RSPB, The Lodge, Sandy, Bedfordshire, UK. E-mail notc@bas.ac.uk
References
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Aguirre-Muñoz A., Croll D.A., Donlan C.J., Henry R.W., Hermosillo M.A., Howald G.R. et al. (2008) High-impact conservation action: invasive mammal eradication from the islands of western Mexico. Ambio, 27, 101107.
Allan R.G. (1962) The Madeiran storm petrel Oceanodroma castro. Ibis, 103b, 274295.
Amerson A.B. Jr & Shelton P.C. (1976) The natural history of Johnston Atoll, central Pacific Ocean. Atoll Research Bulletin, 192, 1479.
Ashmole N.P., Ashmole M.J. & Simmons K.E.L. (1994) Seabird conservation on Ascension Island. In Seabirds on Islands: Threats, Case Studies and Action Plans (eds Nettleship D.N., Burger J. & Gochfeld M.), pp. 94121. BirdLife International, Cambridge, UK.
Bester M.N., Bloomer J.P., Bartlett P.A., Muller D.D., van Rooyen M. & Buchner H. (2000) Final eradication of feral cats from sub-Antarctic Marion Island, southern Indian Ocean. South African Journal of Wildlife Research, 30, 5357.
BirdLife International (2000) Threatened Birds of the World. Lynx Edicions, Barcelona, Spain.
Blair M. (1989) The RAFOS expedition to Ascension Island, 1987. Journal of the Royal Air Force Ornithological Society, 19, 134.
Brown W.Y. (1973) The breeding biology of sooty terns and brown noddies on Manana or Rabbit Island, Oahu, Hawaii. PhD thesis, University of Hawaii, Honolulu, Hawaii.
Caut S., Angulo E. & Courchamp F. (2008) Dietary shift of an invasive predator: rats, seabirds and sea turtles. Journal of Applied Ecology, 45, 428437.
Cooper J., Marais A.V.N., Bloomer J.P. & Bester M.N. (1995) A success story, breeding of burrowing petrels (Procellariidae) before and after the eradication of feral cats Felis catus at subantarctic Marion Island. Marine Ornithology, 23, 3337.
Courchamp F., Langlais M. & Sugihara G. (1999) Cats protecting birds: modelling the mesopredator release effect. Journal of Animal Ecology, 68, 282292.
Diamond A.W. (1975) The biology of tropicbirds at Aldabra Atoll, Indian Ocean. Auk, 92, 1639.
Dickey R.C., Hughes B.J., Etheridge C., Wearn C. & Walmsley J.G. (1997) Exercise Booby V, Ascension Island 28 Oct.–9 Nov. 1996. Adjutant, 26, 49.
Donlan C.J. & Keitt B.S. (1999) Using research and education to prevent extinction. California Coast and Ocean, 15, 2023.
Donlan C.J. & Wilcox C. (2008) Integrating invasive mammal eradications and biodiversity offsets for fisheries bycatch: conservation opportunities and challenges for seabirds and sea turtle. Biological Invasions, 10, 10531060.
Dorward D.F. (1962) Comparative biology of the white booby and the brown booby Sula spp. at Ascension. Ibis, 103b, 174220.
Dorward D.F. & Ashmole N.P. (1962) Notes on the biology of the brown noddy Anous stolidus on Ascension Island. Ibis, 103b, 447457.
Dunlop J.N. (2005) The demography of a new common noddy (Anous stolidus) colony during the establishment period. Emu, 105, 99104.
Eason C.T. & Frampton C.M. (1991) Acute toxicity of sodium monofluoroacetate (1080) baits to feral cats. Wildlife Research, 18, 445449.
Fuller E. (2000) Extinct Birds. Oxford University Press, Oxford, UK.
Genovesi P. (2007) Limits and potentialities of eradication as a tool for addressing biological invasions. In Biological Invasions (ed. Nentwig W.), pp. 385400. Ecological Studies Vol. 93. Springer, New York, USA.
Hänel C. & Chown S. (1998) An Introductory Guide to the Marion and Prince Edward Island Special Nature Reserves. Unpublished Report. Department of Environmental Affairs and Tourism, Pretoria, South Africa.
Hughes B.J., Martin G.R. & Reynolds S.J. (2008) Cats and seabirds: effects of feral domestic cat Felis silvestris catus eradication on the population of sooty terns Onychoprion fuscata on Ascension Island, South Atlantic. Ibis, 150(Suppl. 1), 122131.
Keitt B.S. & Tershy B.R. (2003) Cat eradication significantly reduces shearwater mortality. Animal Conservation, 6, 307308.
Kepler C.B. (1969) Breeding biology of the blue-faced booby Sula dactylatra personata on Green Island, Kure Atoll. Publications of the Nuttall Ornithological Club, 8, 197.
Kildaw S.D., Irons D.B., Nysewander D.R. & Buck C.L. (2005) Formation and growth of new seabird colonies, the significance of habitat quality. Marine Ornithology, 33, 4958.
King B.R., Hicks J.T. & Cornelius J. (1992) Population-changes, breeding cycles and breeding success over six years in a seabird colony at Michaelmas Cay, Queensland. Emu, 92, 110.
Lee D.S. & Walsh-McGhee M. (1998) White-tailed tropicbird Phaethon lepturus. In The Birds of North America (eds Poole A. & Gill F.), No. 353, pp. 125. The Birds of North America Inc., Philadelphia, USA.
Megyesi J.L. & Griffin C.R. (1996) Breeding biology of the brown noddy on Tern Island, Hawaii. Wilson Bulletin, 108, 317334.
Moors P.J. & Atkinson I.A.E. (1984) Predation on seabirds by introduced animals, and factors affecting its severity. In Status and Conservation of the World's Seabirds (eds Croxall J.P., Evans P.G.H. & Schreiber R.W.), pp. 667690. ICBP Technical Publication No. 2, Cambridge, UK.
Morris R.D. (1984) Breeding chronology and reproductive success of seabirds on little Tobago, Trinidad, 1975–1976. Colonial Waterbirds, 7, 19.
Morris R.D. & Chardine J.W. (1992) The breeding biology and aspects of the feeding ecology of brown noddies Anous stolidus nesting near Culebra, Puerto-Rico, 1985–1989. Journal of Zoology, 226, 6579.
Nelson J.B. (1978) The Sulidae, Gannets and Boobies. Oxford University Press, Oxford, UK.
Nogales M., Martin A., Tershy B.R., Donlan C.J., Veitch C.R., Pureta N. et al. (2004) A review of feral cat eradications on islands. Conservation Biology, 18, 310319.
Olson S.L. (1977) Additional notes on sub fossil bird remains from Ascension Island. Ibis, 119, 3743.
Pain D.J., White R., Stevenson J., Bell M., Williams K.K., Fisher P. & Wright G. (2007) Toxicity and persistence of sodium fluoroacetate (1080) in the land crab (Gecarcinus lagostoma) on Ascension Island. Wildlife Research, 35, 8692.
Pascal M., Brithmer R., Lorvelec O. & Venumiere N. (2004) Consequences of the ship rat's (Rattus rattus) recent invasion on the breeding avifauna of Sainte-Anne Islets Natural Reserve (Martinique, French West Indies), established after an eradication attempt. Revue d’ Ecologie-la Terre et la Vie, 59, 12.
Peck D.R., Faulquier L., Pinet P., Jaquemet S. & Le Corre M. (2008) Feral cat diet and impact on sooty terns at Juan de Nova Island, Mozambique Channel. Animal Conservation, 11, 6574.
Phillips N.J. (1987) The breeding biology of white-tailed tropicbirds at Cousin Island, Seychelles. Ibis, 129, 1024.
Phillips R.B., Cooke B.D., Campbell K., Carrion V., Marquez C. & Snell H.L. (2005) Eradicating feral cats to protect Galapagos land iguanas: methods and strategies. Pacific Conservation Biology, 11, 5766.
Priddel D., Hutton I., Olson S. & Wheeler R. (2005) Breeding biology of masked boobies (Sula dactylatra tasmani) on Lord Howe Island, Australia. Emu, 105, 105113.
Prys-Jones R.P. & Peet C. (1980) Breeding periodicity, nesting success and nest site selection among red-tailed and white-tailed tropicbirds on Aldabra Atoll. Ibis, 122, 7681.
Pyle P., Spear L.B., Sydeman W.J. & Ainley D.G. (1991) The effects of experience and age on the breeding performance of Western Gulls. Auk, 108, 2533.
Ramos J.A., Bowler J., Betts D.M., Pacheco C., Agombar J., Bullock I. & Monticelli D. (2005) Productivity of white-tailed tropicbird on Aride Island, Seychelles. Waterbirds, 28, 405410.
Ramos J.A., Maul A.M., Bowler J., Wood L., Threadgold R., Johnson S. et al. (2006) Annual variation in laying date and breeding success of brown noddies on Aride Island, Seychelles. Emu, 106, 8186.
Ratcliffe N. (2001) Ascension Island Seabird Monitoring Manual. RSPB report, Sandy, UK.
Ratcliffe N., Furness R.W. & Klomp N.I. (1998) Influences of breeding experience on the reproductive performance of great skuas. Journal of Avian Biology, 29, 293298.
Ratcliffe N., White R. & Pelembe T. (2008) Resolving the status of Ascension frigatebird using a “virtual ecologist” model. Ibis, 150, 300306.
Rodriguez C., Torres R. & Drummond H. (2006) Eradicating introduced mammals from a forested tropical island. Biological Conservation, 130, 98105.
Rosenzweig M.L. (1995) Species Diversity in Space and Time. Cambridge University Press, Cambridge, UK.
Rotella J.J., Dinsmore S.J. & Shaffer T.L. (2004) Modeling nest-survival data: a comparison of recently developed methods that can be implemented in MARK and SAS. Animal Biodiversity & Conservation, 27, 187204.
Schaffner F.C. (1991) Nest-site selection and nesting success of white-tailed tropicbirds (Phaethon lepturus) at Cayo Luis Pena, Puerto-Rico. Auk, 108, 911922.
Schreiber E.A., Doherty P.F. & Shenk G.A. (2004) Dispersal and survival rates of adult and juvenile red-tailed tropicbirds (Phaethon rubricauda) exposed to potential contaminants. Animal Biodiversity & Conservation, 27, 531540.
Schreiber E.A. & Norton R.L. (2002) Brown booby Sula leucogaster. In The Birds of North America (eds Poole A. & Gill F.), No. 649, pp. 127. The Birds of North America Inc., Philadelphia, USA.
Simmons K.E.L. & Prytherch R. (1997) Ascension Island 1996. Ibis, 139, 433434.
Steeves T.E., Anderson D.J. & Fresien V.L. (2005) A role for non-physical barriers to gene flow in the diversification of a highly vagile seabird, the masked booby (Sula dactylatra). Molecular Ecology, 14, 38773887.
Stonehouse B. (1962) The tropic birds (Genus Phaethon) of Ascension Island. Ibis, 103b, 124161.
Vázquez-Domínguez E., Ceballos G. & Cruzado J. (2004) Extirpation of an insular subspecies by a single introduced cat, the case of the endemic deer mouse Peromyscus guardia on Estanque Island, Mexico. Oryx, 38, 347350.
Veitch C.R. (1985) Methods of eradicating feral cats from offshore islands in New Zealand. In Conservation of Island Birds (ed. Moors R.J.), pp. 125141. ICBP Technical Publication 3, Cambridge, UK.
Veitch C.R. (2001) The eradication of feral cats (Felis catus) from Little Barrier Island, New Zealand. New Zealand Journal of Zoology, 28, 112.
Weimerskirch H. (2002) Seabird demography and its relationship with the marine environment. In Biology of Marine Birds (eds Schreiber E.A. & Burger J.), pp. 115135. CRC Press, Boca Raton, USA.
Wolf S.G. (2002) Relative status and conservation of island breeding seabirds in California and north-western Mexico. MSc thesis, University of California, Santa Cruz, USA.
Woodward P.W. (1972) The natural history of Kure Atoll, north-western Hawaiian Islands. Atoll Research Bulletin, 164, 1318.
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