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

 

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dc.contributor.author Johnston, Susan J
dc.contributor.author Butterworth, Doug S
dc.date.accessioned 2016-04-11T10:01:25Z
dc.date.available 2016-04-11T10:01:25Z
dc.date.issued 2004
dc.identifier.citation Johnston, 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.uri http://hdl.handle.net/11427/18742
dc.description.abstract 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. en_ZA
dc.language eng en_ZA
dc.subject.other South African horse mackerel
dc.subject.other assessment
dc.subject.other age-structured production mode
dc.title The South African horse mackerel assessment using an age-structured production model, with future biomass projections en_ZA
dc.type Working Paper en_ZA
dc.date.updated 2016-04-11T10:00:33Z
uct.type.publication Research en_ZA
uct.type.resource Research paper en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Marine Resource Assessment and Management Group en_ZA
uct.type.filetype Text


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