Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill
| dc.contributor.author | Wolfaardt, A C | |
| dc.contributor.author | Underhill, L G | |
| dc.contributor.author | Altwegg, R | |
| dc.contributor.author | Visagie, J | |
| dc.date.accessioned | 2018-02-12T10:59:33Z | |
| dc.date.available | 2018-02-12T10:59:33Z | |
| dc.date.issued | 2008 | |
| dc.date.updated | 2016-01-22T07:24:11Z | |
| dc.description.abstract | The bulk ore carrier Apollo Sea sank south-west of Dassen Island off western South Africa in June 1994, oiling approximately 10 000 African penguins Spheniscus demersus, most of which were collected from Dassen Island. A total of 4 076 de-oiled penguins was released with flipper bands. From 1994 to 2005, follow-up research using re-sighting and capture-mark-recapture methods indicated that about 73% of the de-oiled penguins observed back at Dassen Island attempted to breed, and were thus successfully restored into the breeding population. For de-oiled breeders, the median interval between their first recorded sighting and first recorded breeding attempt was 11 months, indicating a short-term delay in restoration. At least 45% of the de-oiled breeders were still being re-sighted five years after their release, and a minimum of 4% survived into their ninth year. These results represent the most successful restoration estimates anywhere in the world. The proportion of de-oiled juvenile penguins re-sighted back at Dassen Island and recorded breeding was lower than that of birds in adult plumage. De-oiled non-breeders spent significantly more time along the shore and less time within breeding colonies than de-oiled breeders. The mean proportion of de-oiled breeders that abstained from breeding each year during the study period was greater than expected. There was a negative relationship between breeding and subsequent survival and breeding, suggesting a cost of reproduction for de-oiled birds. | |
| dc.identifier | http://dx.doi.org/10.2989/AJMS.2008.30.2.14.564 | |
| dc.identifier.apacitation | Wolfaardt, A. C., Underhill, L. G., Altwegg, R., & Visagie, J. (2008). Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill. <i>African Journal of Marine Science</i>, http://hdl.handle.net/11427/27542 | en_ZA |
| dc.identifier.chicagocitation | Wolfaardt, A C, L G Underhill, R Altwegg, and J Visagie "Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill." <i>African Journal of Marine Science</i> (2008) http://hdl.handle.net/11427/27542 | en_ZA |
| dc.identifier.citation | Wolfaardt, A. C., Underhill, L. G., Altwegg, R., & Visagie, J. (2008). Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill. African Journal of Marine Science, 30(2), 421-436. | |
| dc.identifier.ris | TY - Journal Article AU - Wolfaardt, A C AU - Underhill, L G AU - Altwegg, R AU - Visagie, J AB - The bulk ore carrier Apollo Sea sank south-west of Dassen Island off western South Africa in June 1994, oiling approximately 10 000 African penguins Spheniscus demersus, most of which were collected from Dassen Island. A total of 4 076 de-oiled penguins was released with flipper bands. From 1994 to 2005, follow-up research using re-sighting and capture-mark-recapture methods indicated that about 73% of the de-oiled penguins observed back at Dassen Island attempted to breed, and were thus successfully restored into the breeding population. For de-oiled breeders, the median interval between their first recorded sighting and first recorded breeding attempt was 11 months, indicating a short-term delay in restoration. At least 45% of the de-oiled breeders were still being re-sighted five years after their release, and a minimum of 4% survived into their ninth year. These results represent the most successful restoration estimates anywhere in the world. The proportion of de-oiled juvenile penguins re-sighted back at Dassen Island and recorded breeding was lower than that of birds in adult plumage. De-oiled non-breeders spent significantly more time along the shore and less time within breeding colonies than de-oiled breeders. The mean proportion of de-oiled breeders that abstained from breeding each year during the study period was greater than expected. There was a negative relationship between breeding and subsequent survival and breeding, suggesting a cost of reproduction for de-oiled birds. DA - 2008 DB - OpenUCT DP - University of Cape Town J1 - African Journal of Marine Science LK - https://open.uct.ac.za PB - University of Cape Town PY - 2008 T1 - Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill TI - Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill UR - http://hdl.handle.net/11427/27542 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/27542 | |
| dc.identifier.vancouvercitation | Wolfaardt AC, Underhill LG, Altwegg R, Visagie J. Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill. African Journal of Marine Science. 2008; http://hdl.handle.net/11427/27542. | en_ZA |
| dc.language.iso | eng | |
| dc.publisher.department | Department of Biological Sciences | en_ZA |
| dc.publisher.faculty | Faculty of Science | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.source | African Journal of Marine Science | |
| dc.source.uri | http://www.tandfonline.com/loi/tams20 | |
| dc.subject.other | African penguin | |
| dc.subject.other | Apollo Sea | |
| dc.subject.other | breeding | |
| dc.subject.other | capture-mark-recapture | |
| dc.subject.other | Dassen Island | |
| dc.subject.other | de-oiling | |
| dc.subject.other | oiling | |
| dc.subject.other | rehabilitation | |
| dc.subject.other | restoration | |
| dc.subject.other | South Africa | |
| dc.subject.other | Spheniscus demersus | |
| dc.title | Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill | |
| dc.type | Journal Article | |
| uct.type.filetype | Text | |
| uct.type.filetype | Image |