Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:2003This document presents an updated assessment of the M. paradoxus hake resource off the south and west coasts of South Africa. The previous assessment of this resource is described in Rademeyer and Butterworth (2002).Read more
Author:Rademeyer, Rebecca A; Glazer, Jean PatriciaDate:2006The algorithm for the 2006 Operational Management Procedure (OMP) to provide TAC recommendations for the South African Merluccius paradoxus and M. capensis resources is empirical, increasing or decreasing the TAC in relation to the magnitude ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:2007This paper presents a routine update of the South African hake assessment, including new commercial (catches and
CPUE) and survey (abundance estimates and catch-at-age) data. Only one scenario (M1-H1-C1-SR2) of the Reference
Set, which is ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:2008This paper presents a routine update of the South African hake assessment, including new commercial (catches and CPUE) and survey (abundance estimates) data. This update is for a “baseline” assessment, chosen to correspond to the scenario ...Read more
Author:Rademeyer, Rebecca ADate:2011As required under the annual OMP review process, this paper presents a routine update of the South African hake
Reference Case assessment (RS1) (Rademeyer and Butterworth, 2010), including new commercial (catches and CPUE)
and survey ...Read more
Author:Rademeyer, Rebecca ADate:2012This paper presents a routine update of the South African hake Reference Case assessment (RS1) (Rademeyer and Butterworth, 2010), including new commercial (catches and CPUE) and survey (abundance estimates and length distribution) data. This ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:2013A Reference Set (RS) of 12 scenarios was selected as the primary basis to be used to simulation test candidates for OMP-2011 (Rademeyer and Butterworth, 2010). This paper presents an update of this RS, based on updated commercial data (catches, ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:2013The Reference Case assessment of the SA hake resource is updated using unchanged
methodology from that used in developing the existing OMP, but with revised and updated
data sets. The only change of particular note is the inclusion of new ...Read more
Author:Butterworth, Doug S; Rademeyer, Rebecca ADate:2008Deadlines for the submission of the main text of this paper did not allow time for the computation of Frebuild statistics. This statistic is reported here for the one case amongst the 16 assessment options of the main paper for which the ...Read more
Author:Rademeyer, Rebecca ADate:2009The revised methodology for hake assessments currently under development requires inputs on the
relative biases amongst different readers of hake ages from otoliths, and the extent of variability of
these readings. This document details the ...Read more
Author:Butterworth, Doug S; Rademeyer, Rebecca ADate:2006This document summarises alternative stock structure hypotheses for the southern African hakes. The alternatives put forward could apply to either M. capensis or M. paradoxus. In the scenarios to be considered, the stock structure as modelled ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:2010This document reports progress on hake OMP revision issues identified at the last DWG meeting as requiring further attention. In particular it updates the Reference Case CMP in terms of the agreements reached at that meeting. Suggestions are ...Read more
Author:Butterworth, Doug S; Rademeyer, Rebecca ADate:2008A Reference Case application of ASPM to the Georges Bank yellowtail flounder, together with three sensitivies, is presented. Strong residual patterns in the fits to survey indices of abundance, particularly to that for the Canadian DFO Spring ...Read more
Author:Rademeyer, Rebecca ADate:2003The hake fishery off southern Africa is a highly valuable and important fishery in terms of both revenue and local employment. This thesis considers the current assessment and management of the Cape hakes stocks. It commences with a brief ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug S; Plagányi, Éva EDate:2008The commercially valuable hake fishery off South Africa consists of two morphologically similar species, the shallow-water Cape hake Merluccius capensis and the deep-water Cape hake M. paradoxus. Because catch-and effort statistics collected ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug S; Penney, Andrew JDate:2004The primary assessment method applied to South Atlantic albacore during the October 2000
ICCAT SCRS assessment session was an age-structured production model which assumed a
fleet-aggregated selectivity pattern with a single change only (in ...Read more
Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:Sep 2016An investigation of the reasons for the changes in particularly M. paradoxus assessment results from the May to the September Reference Case (RC) assessments shows these to be almost entirely a consequence of the changed formulations for ...Read morecb
Author:Rademeyer, Rebecca A; Butterworth, Doug SDate:Sep 2016An investigation of the reasons for the changes in particularly M. paradoxus assessment results from the May to the September Reference Case (RC) assessments shows these to be almost entirely a consequence of the changed formulations for ...Read morecb