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RESEARCH ARTICLE
Contents Vol 110(2)

Breeding success of Northern Rockhopper Penguins (Eudyptes moseleyi) at Gough Island, South Atlantic Ocean

J. W. Wilson A B C E , M.-H. Burle A B , R. Cuthbert A , R. L. Stirnemann D and P. G. Ryan B
+ Author Affiliations
- Author Affiliations

A Royal Society for the Protection of Birds, The Lodge, Sandy, Bedfordshire, SG19 2DL, UK.

B DST/NRF Centre of Excellence at the Percy FitzPatrick Institute, University of Cape Town, Rondebosch 7701, South Africa.

C Present address: Biology Department, Campus Box 7617, North Carolina State University, Raleigh, NC 27695-7617, USA.

D Botany Department, Trinity College, Dublin 2, Ireland.

E Corresponding author. Email: johnnybirder@gmail.com

Emu 110(2) 137-141 https://doi.org/10.1071/MU09095
Submitted: 8 October 2009  Accepted: 8 December 2009   Published: 19 May 2010

Abstract

Populations of Northern Rockhopper Penguins (Eudyptes moseleyi) are declining, and their breeding success is low compared with that of other species of Eudyptes. We tracked loss of broods and investigated how the response to threats by breeding birds and the density of nests in a colony influence breeding success of Northern Rockhopper Penguins on Gough Island. Brood loss was greatest (33–61%) during incubation and the early chick stage. Most (71%) hatchlings survived to form crèches, and 73% of chicks present during early crèche formation moulted into juvenile plumage. Breeding success was significantly positively correlated with the response to threats by breeding birds and the number of other breeding birds within a 1.5-m radius, a relationship that may be increasingly important in a declining penguin population.


Acknowledgements

Logistical support at Gough Island was provided by the then South African Department of Environmental Affairs and Tourism through the South African National Antarctic Program. Financial support was obtained from the Royal Society for the Protection of Birds and the University of Cape Town. The Administrator of Tristan da Cunha granted us permission to undertake research at Gough Island. Mike Scantlebury and two anonymous reviewers provided useful comments on earlier versions of the manuscript.


References

Banks, J. , van Buren, A. , Cherel, Y. , and Whitfield, J. B. (2006). Genetic evidence for three species of rockhopper penguins, Eudyptes chrysocome. Polar Biology 30, 61–67.
| Crossref | GoogleScholarGoogle Scholar | BirdLife International (2004). ‘State of the World’s Birds: Indicators of Our Changing World.’ (BirdLife International: Cambridge, UK.)

BirdLife International (2008). ‘Treatened Birds of the World.’ (CD-ROM) (BirdLife International: Cambridge, UK.)

Boersma, P. D. , Rebstock, G. A. , and Stokes, D. L. (2004). Why penguin eggshells are thick. Auk 121, 148–155.
| Crossref | GoogleScholarGoogle Scholar | Cuthbert R. J. , and Sommer E. (2004 b). Gough Island bird monitoring manual. RSPB Research Report No. 2. Royal Society for the Protection of Birds, Sandy, Bedfordshire, UK.

Cuthbert, R. , Cooper, J. , Burle, M.-H. , Glass, C. J. , Glass, J. P. , Glass, T. , Hilton, G. M. , Sommer, E. S. , Wanless, R. M. , and Ryan, P. G. (2009). Population trends and conservation status of the Northern Rockhopper Penguin Eudyptes moseleyi at Tristan da Cunha and Gough Island. Bird Conservation International 19, 109–120.
| Crossref | GoogleScholarGoogle Scholar | Ellis S. , Croxall J. P. , and Cooper J. (1998). Penguin conservation assessment and management plan. Report. International Union for Conservation of Nature/Species Survival Commission, Conservation Breeding Specialist Group, Apple Valley, MN, USA.

Hull, C. L. , and Wilson, J. (1996). The effect of investigators on the breeding success of royal, Eudyptes schlegeli, and rockhopper E. chrysocome, penguins at Macquarie Island. Polar Biology 16, 335–337.
| Crossref | GoogleScholarGoogle Scholar | McCullagh P. , and Nelder J. (1989). ‘Generalized Linear Models.’ (Chapman & Hall/CRC: London.)

Miyazaki, M. , and Waas, J. R. (2003). Correlations between body size, defensive behaviour and reproductive success in male Little Blue Penguins Eudyptula minor: implications for female choice. Ibis 145, 98–105.
| Crossref | GoogleScholarGoogle Scholar | R Development Core Team (2008). ‘R: A Language and Environment for Statistical Computing.’ (R Foundation for Statistical Computing: Vienna, Austria.) Available at http://www.R-project.org [Verified 13 April 2010].

Renison, D. , Boersma, D. , and Martella, M. B. (2001). Winning and losing: causes for variability in outcome of fights in male Magellanic penguins (Spheniscus magellanicus). Behavioral Ecology 13, 462–466.
| Crossref | GoogleScholarGoogle Scholar | Rowlands B. W. (2001). St Helena and the Dependencies of Ascension Island and Tristan da Cunha, including Gough Island. In ‘Important Bird Areas of Africa and its Islands. Priority Sites for Conservation’. (Eds L. D. C. Fishpool and M. I. Evans.) pp. 711–725. (Pisces Publications: Newbury, UK; and Birdlife International: Cambridge, UK.)

St Clair, C. C. , and St Clair, R. C. (1996). Causes and consequences of egg loss in Rockhopper Penguins Eudyptes chrysocome. Oikos 77, 459–466.
| Crossref | GoogleScholarGoogle Scholar | Woehler E. J. , Cooper J. , Croxall J. P. , Fraser W. R. , Kooyman G. L. , Miller G. D. , Nel D. C. , Patterson D. L. , et al (2001). A statistical assessment of the status and trends of Antarctic and Subantarctic seabirds. Scientific Committee on Antarctic Research, Cambridge, UK.