The South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projections

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dc.contributor.authorJohnston, Susan J
dc.contributor.authorButterworth, Doug S
dc.date.accessioned2016-04-20T12:42:59Z
dc.date.available2016-04-20T12:42:59Z
dc.date.issued2007
dc.date.updated2016-04-20T12:41:47Z
dc.description.abstractThe conventional ASPM assessment of the South African horse mackerel resource is updated by taking account of recent trawl survey results. Projections are similar to those of previous assessments: a demersal/deepwater catch of 44 000 tons pa can be increased only provided the annual pelagic catch is kept below 5000 tons, or if the swept area survey results reflect appreciable negative bias. Acoustic survey estimates for recruit biomass are comparable with those from the ASPM, but acoustic estimates for total biomass are much less.en_ZA
dc.identifier.apacitationJohnston, S. J., & Butterworth, D. S. (2007). <i>The South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projections</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/19015en_ZA
dc.identifier.chicagocitationJohnston, Susan J, and Doug S Butterworth <i>The South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projections.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2007. http://hdl.handle.net/11427/19015en_ZA
dc.identifier.citationJohnston, S. J., & Butterworth, D. S. (2007). The South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projections. Unpublished report, DAFF, South Africa.en_ZA
dc.identifier.ris TY - Working Paper AU - Johnston, Susan J AU - Butterworth, Doug S AB - The conventional ASPM assessment of the South African horse mackerel resource is updated by taking account of recent trawl survey results. Projections are similar to those of previous assessments: a demersal/deepwater catch of 44 000 tons pa can be increased only provided the annual pelagic catch is kept below 5000 tons, or if the swept area survey results reflect appreciable negative bias. Acoustic survey estimates for recruit biomass are comparable with those from the ASPM, but acoustic estimates for total biomass are much less. DA - 2007 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 T1 - The South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projections TI - The South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projections UR - http://hdl.handle.net/11427/19015 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/19015
dc.identifier.vancouvercitationJohnston SJ, Butterworth DS. The South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projections. 2007 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19015en_ZA
dc.languageengen_ZA
dc.publisher.departmentMarine Resource Assessment and Management Groupen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.titleThe South African horse mackerel assessment for 2007 using an age-structured production model, with future biomass projectionsen_ZA
dc.typeWorking Paperen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceResearch paperen_ZA
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