Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Breeding Jackass Penguins as pelagic predators
Bibliography: pages 187-191.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Percy FitzPatrick Institute of African Ornithology
2016
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613246737874944 |
|---|---|
| access_status_str | Open Access |
| author | Wilson, Rory Paul |
| author2 | Siegfried, Roy |
| author_browse | Siegfried, Roy Wilson, Rory Paul |
| author_facet | Siegfried, Roy Wilson, Rory Paul |
| author_sort | Wilson, Rory Paul |
| collection | Thesis |
| description | Bibliography: pages 187-191. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17653 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:05.164Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Percy FitzPatrick Institute of African Ornithology |
| publisherStr | Percy FitzPatrick Institute of African Ornithology |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/17653 Breeding Jackass Penguins as pelagic predators Wilson, Rory Paul Siegfried, Roy Ornithology Zoology Predatory animals Jackass penguin Bibliography: pages 187-191. The foraging of breeding Jackass Penguins Spheniscus demersus was studied in and around southwestern Cape Province, Saldanha Bay (33⁰ S, 18⁰ E), South Africa. Penguins are difficult to observe at sea. Hence, I devised a number of new techniques for studying the foraging behaviour of Jackass Penguins at sea. I built electronic and autoradiographic remote-sensing devices to measure swimming speed, distance travelled and time spent at each depth by foraging Jackass Penguins. Penguin swimming speed was reduced in proportion to the cross-sectional area of the devices, and results derived from birds wearing the devices had to be interpreted accordingly. Penguins do not regurgitate their stomach contents when handled, so I constructed a wet-offloading stomach pump which extracted 100% of the stomach contents. Using this pump, I determined that the rate of digestion of fish and squid by Jackass Penguins differed. Care is needed in diet interpretations where both fish and squid are major food items. 2016-03-11T14:25:46Z 2016-03-11T14:25:46Z 1986 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/17653 eng application/pdf Percy FitzPatrick Institute of African Ornithology Faculty of Science University of Cape Town |
| spellingShingle | Ornithology Zoology Predatory animals Jackass penguin Wilson, Rory Paul Breeding Jackass Penguins as pelagic predators |
| thesis_degree_str | Doctoral |
| title | Breeding Jackass Penguins as pelagic predators |
| title_full | Breeding Jackass Penguins as pelagic predators |
| title_fullStr | Breeding Jackass Penguins as pelagic predators |
| title_full_unstemmed | Breeding Jackass Penguins as pelagic predators |
| title_short | Breeding Jackass Penguins as pelagic predators |
| title_sort | breeding jackass penguins as pelagic predators |
| topic | Ornithology Zoology Predatory animals Jackass penguin |
| url | http://hdl.handle.net/11427/17653 |
| work_keys_str_mv | AT wilsonrorypaul breedingjackasspenguinsaspelagicpredators |