Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery

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dc.contributor.advisorField, John Gen_ZA
dc.contributor.advisorNewman , G Gen_ZA
dc.contributor.authorCrawford, R J Men_ZA
dc.date.accessioned2016-03-21T19:23:47Z
dc.date.available2016-03-21T19:23:47Z
dc.date.issued1979en_ZA
dc.descriptionBibliography: pages 281-290.en_ZA
dc.description.abstractSouth Africa's Western Cape purse-seine fishery is situated off the country's western seaboard in the highly productive waters of the southern Benguela Current system (Cushing 1969). Management of the multi-species resource is the responsibility of the government's Department of Industries and since 1950 a large volume of data relating to performances of contributing species has been collected. Recent analyses have indicated an oversubscription of effort, a sequential depletion of the more valuable stocks and, consequently, a present reliance upon less favourable species (Newman and Crawford 1979, Crawford et al. in press). These adverse trends have been precipitated, in part at least, by ineffective legislation, which has resulted from a past failure to appreciate that exceptionally good year classes occur infrequently (Newman and Crawford in- press). Optimal ways of harvesting strong cohorts, or of avoiding overexploitation in the event of recruitment failure, remain to be explored.en_ZA
dc.identifier.apacitationCrawford, R. J. M. (1979). <i>Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/18101en_ZA
dc.identifier.chicagocitationCrawford, R J M. <i>"Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1979. http://hdl.handle.net/11427/18101en_ZA
dc.identifier.citationCrawford, R. 1979. Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Crawford, R J M AB - South Africa's Western Cape purse-seine fishery is situated off the country's western seaboard in the highly productive waters of the southern Benguela Current system (Cushing 1969). Management of the multi-species resource is the responsibility of the government's Department of Industries and since 1950 a large volume of data relating to performances of contributing species has been collected. Recent analyses have indicated an oversubscription of effort, a sequential depletion of the more valuable stocks and, consequently, a present reliance upon less favourable species (Newman and Crawford 1979, Crawford et al. in press). These adverse trends have been precipitated, in part at least, by ineffective legislation, which has resulted from a past failure to appreciate that exceptionally good year classes occur infrequently (Newman and Crawford in- press). Optimal ways of harvesting strong cohorts, or of avoiding overexploitation in the event of recruitment failure, remain to be explored. DA - 1979 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1979 T1 - Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery TI - Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery UR - http://hdl.handle.net/11427/18101 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18101
dc.identifier.vancouvercitationCrawford RJM. Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1979 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18101en_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.titleImplications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fisheryen_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
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