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

Simple item page
dc.contributor.authorJohnston, Susan J
dc.contributor.authorButterworth, Doug S
dc.date.accessioned2016-04-11T10:01:25Z
dc.date.available2016-04-11T10:01:25Z
dc.date.issued2004
dc.date.updated2016-04-11T10:00:33Z
dc.description.abstractThe South African horse mackerel (Trachurus trachurus capensis) fishery began in 1950. It currently consists of a demersal/midwater trawl fleet (concentrated on the South coast) and a pelagic purse-seine fishery (concentrated on the West Coast). Adult horse mackerel are taken as a by-catch by the demersal trawl fleet and as a targeted catch by the midwater trawl fleet. Juvenile horse mackerel are taken as a by-catch by the pelagic purseseine fleet. Previous stock assessments for this fishery include a surplus production model (Punt 1989, 1992), and a Beverton-Holt yield-per-recruit approach (Butterworth and Raubenheimer 1992; Butterworth and Clarke 1996). For convenience, the rest of this paper uses “demersal” to imply both midwater and demersal operations.en_ZA
dc.identifier.apacitationJohnston, S. J., & Butterworth, D. S. (2004). <i>The South African horse mackerel assessment 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/11427/18742en_ZA
dc.identifier.chicagocitationJohnston, Susan J, and Doug S Butterworth <i>The South African horse mackerel assessment using an age-structured production model, with future biomass projections.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2004. http://hdl.handle.net/11427/18742en_ZA
dc.identifier.citationJohnston, S. J., & Butterworth, D. S. (2004). The South African horse mackerel assessment using an age-structured production model, with future biomass projections. BENEFIT Programme. BEN/DEC04/HM/SA/4a. 24pp.en_ZA
dc.identifier.ris TY - Working Paper AU - Johnston, Susan J AU - Butterworth, Doug S AB - The South African horse mackerel (Trachurus trachurus capensis) fishery began in 1950. It currently consists of a demersal/midwater trawl fleet (concentrated on the South coast) and a pelagic purse-seine fishery (concentrated on the West Coast). Adult horse mackerel are taken as a by-catch by the demersal trawl fleet and as a targeted catch by the midwater trawl fleet. Juvenile horse mackerel are taken as a by-catch by the pelagic purseseine fleet. Previous stock assessments for this fishery include a surplus production model (Punt 1989, 1992), and a Beverton-Holt yield-per-recruit approach (Butterworth and Raubenheimer 1992; Butterworth and Clarke 1996). For convenience, the rest of this paper uses “demersal” to imply both midwater and demersal operations. DA - 2004 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2004 T1 - The South African horse mackerel assessment using an age-structured production model, with future biomass projections TI - The South African horse mackerel assessment using an age-structured production model, with future biomass projections UR - http://hdl.handle.net/11427/18742 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18742
dc.identifier.vancouvercitationJohnston SJ, Butterworth DS. The South African horse mackerel assessment using an age-structured production model, with future biomass projections. 2004 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18742en_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.subject.otherSouth African horse mackerel
dc.subject.otherassessment
dc.subject.otherage-structured production mode
dc.titleThe South African horse mackerel assessment using an age-structured production model, with future biomass projectionsen_ZA
dc.typeWorking Paperen_ZA
uct.type.filetypeText
uct.type.publicationResearchen_ZA
uct.type.resourceResearch paperen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Johnston_South_African_horse_2004.pdf
Size:
153.58 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.72 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Working Papers