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The incidence and effects of ingested plastic in seabirds
This thesis comprises two major sections: an assessment of the incidence of plastic particles at sea and in seabirds {Chapters 1-3), and an investigation of the postulated effects of plastic ingestion on seabirds (Chapters 4-7). The incidence of plastic at sea was recorded from neuston trawls perfor...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2016
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| _version_ | 1867613226211999745 |
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| access_status_str | Open Access |
| author | Ryan, Peter G |
| author2 | Siegfried, Roy |
| author_browse | Ryan, Peter G Siegfried, Roy |
| author_facet | Siegfried, Roy Ryan, Peter G |
| author_sort | Ryan, Peter G |
| collection | Thesis |
| description | This thesis comprises two major sections: an assessment of the incidence of plastic particles at sea and in seabirds {Chapters 1-3), and an investigation of the postulated effects of plastic ingestion on seabirds (Chapters 4-7). The incidence of plastic at sea was recorded from neuston trawls performed monthly at 120 sampling stations off the southwestern Cape, South Africa, during 1977-78. The types of plastic particles collected are described, and the temporal and spatial distribution patterns of plastic pollution are discussed. Ingested plastic was recorded from 36 of 60 seabird species sampled. The effect of different sampling techniques on the incidence of plastic is discussed. The frequencies of occurrence of plastic colour-types in birds are compared with those of particles collected at sea in neuston trawls. Pale particles were under-represented in all species, but the disparity was less for small than for large species, which may account for the higher incidence of ingested plastic in small than in large species. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/19522 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:46.693Z |
| 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 | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/19522 The incidence and effects of ingested plastic in seabirds Ryan, Peter G Siegfried, Roy Zoology This thesis comprises two major sections: an assessment of the incidence of plastic particles at sea and in seabirds {Chapters 1-3), and an investigation of the postulated effects of plastic ingestion on seabirds (Chapters 4-7). The incidence of plastic at sea was recorded from neuston trawls performed monthly at 120 sampling stations off the southwestern Cape, South Africa, during 1977-78. The types of plastic particles collected are described, and the temporal and spatial distribution patterns of plastic pollution are discussed. Ingested plastic was recorded from 36 of 60 seabird species sampled. The effect of different sampling techniques on the incidence of plastic is discussed. The frequencies of occurrence of plastic colour-types in birds are compared with those of particles collected at sea in neuston trawls. Pale particles were under-represented in all species, but the disparity was less for small than for large species, which may account for the higher incidence of ingested plastic in small than in large species. 2016-05-09T09:02:45Z 2016-05-09T09:02:45Z 1986 Master Thesis Masters MSc http://hdl.handle.net/11427/19522 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Zoology Ryan, Peter G The incidence and effects of ingested plastic in seabirds |
| thesis_degree_str | Master's |
| title | The incidence and effects of ingested plastic in seabirds |
| title_full | The incidence and effects of ingested plastic in seabirds |
| title_fullStr | The incidence and effects of ingested plastic in seabirds |
| title_full_unstemmed | The incidence and effects of ingested plastic in seabirds |
| title_short | The incidence and effects of ingested plastic in seabirds |
| title_sort | incidence and effects of ingested plastic in seabirds |
| topic | Zoology |
| url | http://hdl.handle.net/11427/19522 |
| work_keys_str_mv | AT ryanpeterg theincidenceandeffectsofingestedplasticinseabirds AT ryanpeterg incidenceandeffectsofingestedplasticinseabirds |