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.advisor Field, John G en_ZA
dc.contributor.advisor Newman , G G en_ZA
dc.contributor.author Crawford, R J M en_ZA
dc.date.accessioned 2016-03-21T19:23:47Z
dc.date.available 2016-03-21T19:23:47Z
dc.date.issued 1979 en_ZA
dc.identifier.citation Crawford, 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.uri http://hdl.handle.net/11427/18101
dc.description Bibliography: pages 281-290. en_ZA
dc.description.abstract 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. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Zoology en_ZA
dc.title Implications of recruitment, distribution and availability of stocks for management of South Africa's Western Cape purse-seine fishery en_ZA
dc.type Doctoral Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
dc.type.qualificationlevel Doctoral
dc.type.qualificationname PhD en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Crawford, 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/11427/18101 en_ZA
dc.identifier.chicagocitation Crawford, 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/11427/18101 en_ZA
dc.identifier.vancouvercitation Crawford 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/11427/18101 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


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