Ecology of the migration and distribution of the anchovy Engraulis capensis off Namibia

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dc.contributor.advisorBranch, George Men_ZA
dc.contributor.authorCruickshank, Roy Anthonyen_ZA
dc.date.accessioned2016-02-29T12:06:07Z
dc.date.available2016-02-29T12:06:07Z
dc.date.issued1987en_ZA
dc.description.abstractThis thesis investigates the patterns of distribution and migration of the adult and recruit shoals of anchovy Engraulis capensis off Namibia and the environmental factors most important to such distributions and migrations. It also examines anchovy feeding patterns. The distributions of anchovy shoals in summer months were recorded during extensive, acoustic surveys along the whole Namibian coastline from November 1978 to March 1982. A purse-seine fishing vessel was used to identify the shoals detected. Winter surveys of selected parts of the coastal waters recorded shoal distribution and sampled the fish and environmental factors associated with the densest shoal groups. Shoal groups were followed for periods in excess of 24 hours and sampled at 4-hour intervals. Winter distribution, length and age composition were also obtained from the commercial fishery statistics. Stomach contents extracted from samples of anchovy shoals were compared to water samples from their environment. Data on diet obtained from the fishery catch statistics are analysed to indicate feeding trends.en_ZA
dc.identifier.apacitationCruickshank, R. A. (1987). <i>Ecology of the migration and distribution of the anchovy Engraulis capensis off Namibia</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/17364en_ZA
dc.identifier.chicagocitationCruickshank, Roy Anthony. <i>"Ecology of the migration and distribution of the anchovy Engraulis capensis off Namibia."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1987. http://hdl.handle.net/11427/17364en_ZA
dc.identifier.citationCruickshank, R. 1987. Ecology of the migration and distribution of the anchovy Engraulis capensis off Namibia. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Cruickshank, Roy Anthony AB - This thesis investigates the patterns of distribution and migration of the adult and recruit shoals of anchovy Engraulis capensis off Namibia and the environmental factors most important to such distributions and migrations. It also examines anchovy feeding patterns. The distributions of anchovy shoals in summer months were recorded during extensive, acoustic surveys along the whole Namibian coastline from November 1978 to March 1982. A purse-seine fishing vessel was used to identify the shoals detected. Winter surveys of selected parts of the coastal waters recorded shoal distribution and sampled the fish and environmental factors associated with the densest shoal groups. Shoal groups were followed for periods in excess of 24 hours and sampled at 4-hour intervals. Winter distribution, length and age composition were also obtained from the commercial fishery statistics. Stomach contents extracted from samples of anchovy shoals were compared to water samples from their environment. Data on diet obtained from the fishery catch statistics are analysed to indicate feeding trends. DA - 1987 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1987 T1 - Ecology of the migration and distribution of the anchovy Engraulis capensis off Namibia TI - Ecology of the migration and distribution of the anchovy Engraulis capensis off Namibia UR - http://hdl.handle.net/11427/17364 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17364
dc.identifier.vancouvercitationCruickshank RA. Ecology of the migration and distribution of the anchovy Engraulis capensis off Namibia. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1987 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17364en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherZoologyen_ZA
dc.titleEcology of the migration and distribution of the anchovy Engraulis capensis off Namibiaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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