The efficacy of hand-rearing penguin chicks: evidence from African Penguins (Spheniscus demersus) orphaned in the Treasure oil spill in 2000

Some 2,000 orphaned chicks of African Penguins Spheniscus demersus were hand-reared and released back into the wild on Robben and Dassen Islands following the Treasure oil spill in June 2000. Of these chicks, 1,787 were flipper banded. This paper reports on the subsequent survival rate and breeding...

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Bibliographic Details
Published in:Bird conservation international 2008-06, Vol.18 (2), p.144-152
Main Authors: Barham, Peter J., Underhill, Les G., Crawford, Robert J. M., Altwegg, Res, Mario Leshoro, T., Bolton, Duncan A., Dyer, Bruce M., Upfold, Leshia
Format: Article
Language:English
Subjects:
Breeding success
Chickens
Marine
Oil spills
Spheniscus demersus
Survival
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Summary:Some 2,000 orphaned chicks of African Penguins Spheniscus demersus were hand-reared and released back into the wild on Robben and Dassen Islands following the Treasure oil spill in June 2000. Of these chicks, 1,787 were flipper banded. This paper reports on the subsequent survival rate and breeding success of those individuals seen on Robben Island from 2001–2006. Survival to breeding age and their subsequent breeding success of hand-reared chicks was no different from that of naturally-reared chicks. Over a four-year period, pairs where at least one partner was a hand-reared chick produced an average of more than 1.6 chicks per year. Combining the data on survival with that on breeding success indicates that 1,000 hand-reared chicks will produce around 1,220 chicks themselves over their lifetimes, making this a worthwhile conservation intervention.
ISSN:0959-2709
1474-0001
1471-0001
DOI:10.1017/S0959270908000142