The impact of longline fishing on the seabirds breeding on Marion Island

dc.contributor.advisorRyan, Peter Gen_ZA
dc.contributor.authorNel, Deon Charlen_ZA
dc.date.accessioned2014-10-26T19:32:51Z
dc.date.available2014-10-26T19:32:51Z
dc.date.issued2002en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThis study describes the impact of longline fishing on the seabirds breeding on the sub-Antarctic Prince Edward Islands. The development of a demersal longline fishery for Patagonian toothfish Dissostichus eleginoides close to the islands with almost complete observer coverage during the study allowed a detailed examination of the impacts of this fishery. The vast majority of seabird mortalities were adult males that were breeding at the time they were killed. White-chinned petrels Procellaria aequinoctialis were killed most frequently, but albatrosses and giant petrels were also killed when lines were set in the daytime. Birds were killed almost exclusively during their breeding season, and albatrosses were caught closer to the islands than whitechinned petrels. It is estimated that between 8 500 and 18500 birds could have been killed between 1996-2000, mostly due to high levels of Illegal Unregulated and Unreported (IUU) fishing. This is likely to have a significant impact on the breeding populations of several species of seabirds breeding on the Prince Edward Islands. A large increase in the amount of fishing gear found next to seabird nests as well as fishery-derived items in the diets of wandering albatrosses was recorded concurrent to the development of the toothfish fishery around the Prince Edward Islands. There was also an increase in the number of observed seabird entanglements in fishing gear and mortalities due to the ingestion of fishing gear.en_ZA
dc.identifier.apacitationNel, D. C. (2002). <i>The impact of longline fishing on the seabirds breeding on Marion Island</i>. (Thesis). University of Cape Town ,Faculty of Science ,Percy FitzPatrick Institute of African Ornithology. Retrieved from http://hdl.handle.net/11427/8784en_ZA
dc.identifier.chicagocitationNel, Deon Charl. <i>"The impact of longline fishing on the seabirds breeding on Marion Island."</i> Thesis., University of Cape Town ,Faculty of Science ,Percy FitzPatrick Institute of African Ornithology, 2002. http://hdl.handle.net/11427/8784en_ZA
dc.identifier.citationNel, D. 2002. The impact of longline fishing on the seabirds breeding on Marion Island. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Nel, Deon Charl AB - This study describes the impact of longline fishing on the seabirds breeding on the sub-Antarctic Prince Edward Islands. The development of a demersal longline fishery for Patagonian toothfish Dissostichus eleginoides close to the islands with almost complete observer coverage during the study allowed a detailed examination of the impacts of this fishery. The vast majority of seabird mortalities were adult males that were breeding at the time they were killed. White-chinned petrels Procellaria aequinoctialis were killed most frequently, but albatrosses and giant petrels were also killed when lines were set in the daytime. Birds were killed almost exclusively during their breeding season, and albatrosses were caught closer to the islands than whitechinned petrels. It is estimated that between 8 500 and 18500 birds could have been killed between 1996-2000, mostly due to high levels of Illegal Unregulated and Unreported (IUU) fishing. This is likely to have a significant impact on the breeding populations of several species of seabirds breeding on the Prince Edward Islands. A large increase in the amount of fishing gear found next to seabird nests as well as fishery-derived items in the diets of wandering albatrosses was recorded concurrent to the development of the toothfish fishery around the Prince Edward Islands. There was also an increase in the number of observed seabird entanglements in fishing gear and mortalities due to the ingestion of fishing gear. DA - 2002 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2002 T1 - The impact of longline fishing on the seabirds breeding on Marion Island TI - The impact of longline fishing on the seabirds breeding on Marion Island UR - http://hdl.handle.net/11427/8784 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/8784
dc.identifier.vancouvercitationNel DC. The impact of longline fishing on the seabirds breeding on Marion Island. [Thesis]. University of Cape Town ,Faculty of Science ,Percy FitzPatrick Institute of African Ornithology, 2002 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/8784en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentPercy FitzPatrick Institute of African Ornithologyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherZoologyen_ZA
dc.titleThe impact of longline fishing on the seabirds breeding on Marion Islanden_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
thesis_sci_2002_nel_dc.pdf
Size:
11.29 MB
Format:
Adobe Portable Document Format
Description:
Collections