Age at first breeding of the African penguin
Abstract
Numbers of breeding pairs of African Black Oystercatchers showed a highly significant increase at Cape Agulhas over a 24year study period. Mean numbers of fledglings per pair did not increase correspondingly but showed a cyclic tendency, peaking twice, with a slight overall decline. The increase in the frequency of repeat clutches was close to significant. Nest failures were ascribed largely to human disturbance. Indications of increasing public awareness about the sensitivity of breeding oystercatchers were noted as well as increasing adaptability to human presence among some birds, whereas other birds moved their nests further away from this disturbance. In view of the closure of the Overberg coast to recreational vehicles from 20 February 2002 and the relative importance of the area for the conservation of oystercatchers, this long-term study represents an important baseline against which to measure change.
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African penguins usually breed for the first time at 3 years of age or older.
“as African penguins usually breed for the first time at 3 years of age or older [25].”
From Hand-Rearing, Release and Survival of African Penguin Chicks Abandoned Before Independence by Moulting Parents (2014) · cites this paper as [25]
Survival rates measured in this study suggest that around 14% of hand-reared chicks would have survived to breeding age (4 years old).
“Survival rates measured in this study suggest that around 14% would have survived to breeding age (4 years old [25]).”
From Hand-Rearing, Release and Survival of African Penguin Chicks Abandoned Before Independence by Moulting Parents (2014) · cites this paper as [25]
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Crawford, R. J. M., Barham, P. J., Underhill, L. G., Shannon, L. J., Coetzee, J. C., Dyer, B. M., Leshoro, T. M., & Upfold, L. (2006) · Biological Conservation · doi:10.1016/j.biocon.2006.03.019 · Cited by 108 · see citing works
Self-citationSherley, R. B., Waller, L. J., Strauss, V., Geldenhuys, D., Underhill, L. G., & Parsons, N. J. (2014) · PLoS ONE · doi:10.1371/journal.pone.0110794 · Cited by 34 · see citing works
Ludynia, K., Waller, L., Sherley, R., Abadi, F., Galada, Y., Geldenhuys, D., Crawford, R., Shannon, L., & Jarre, A. (2014) · African Journal of Marine Science · doi:10.2989/1814232x.2014.929027 · Cited by 17 · see citing works
Self-citationKEMPER, J., ROUX, J.-P., & UNDERHILL, L. G. (2008) · The Auk · doi:10.1525/auk.2008.06262 · Cited by 12 · see citing works
Self-citationWolfaardt, A., Underhill, L., & Crawford, R. (2009) · African Journal of Marine Science · doi:10.2989/ajms.2009.31.1.2.773 · Cited by 11 · see citing works
Self-citation
- Authors
- Whittington, P., Klages, N., Crawford, R., Wolfaardt, A., & Kemper, J.
- Affiliations
- University of Cape Town (ZA)
- Nelson Mandela University (ZA)
- CapeNature (ZA)
- Ministy of Fisheries and Marine Resources (NA)
- Venue
- Ostrich
- Published
- 2005-03
- Volume
- 76
- Issue
- 1-2
- Pages
- 14-20
- ISSN
- 0030-6525 (ISSN-L)
- 1727-947X
- OpenAlex
- W2023560273
- Cited by
- 28
- References
- 0
- Citations by year
- 2025: 1 · 2024: 2 · 2022: 1 · 2020: 3 · 2019: 2 · 2018: 1 · 2017: 1 · 2015: 2 · 2014: 3 · 2013: 2
- FWCI
- 2.82
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Ostrich (publishedVersion)
- Nelson Mandela University Research Repository (submittedVersion)
- Topics
- Physical Sciences › Environmental Science › Ecology › Avian ecology and behavior
- Physical Sciences › Environmental Science › Ecology › Marine animal studies overview
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
- Keywords
- fledging success, nest failure, human disturbance, nest site selection, Cape Agulhas, long-term population monitoring, seabird conservation
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