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2003 updated assessment for the Merluccius paradoxus hake resource off the south and west coasts

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: 2003 This 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
The 2006 operational management procedure for the South African Merluccius paradoxus and M. capensis resources

Author: Rademeyer, Rebecca A ; Glazer, Jean Patricia Date: 2006 The 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
2007 Routine update of the South African hake baseline assessment

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: 2007 This 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
2008 routine update of the South African hake resource baseline assessment

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: 2008 This 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
The 2010 operational management procedure for the South African Merluccius paradoxus and M.?capensis resources

Author: Rademeyer, Rebecca A ; Fairweather, T ; Glazer, Jean Patricia ; Leslie, R L ; Butterworth, Doug S Date: 2010 The algorithm for the 2010 Operational Management Procedure (OMP) to provide TAC recommendations for the South African Merluccius paradoxus and M. capensis resources is empirical. It combines an increase or decrease of the TAC in relation to ... Read more
2011 Routine update of the South African hake base reference case assessment

Author: Rademeyer, Rebecca A Date: 2011 As 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
2012 Routine update of the South African hake reference case assessment

Author: Rademeyer, Rebecca A Date: 2012 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 (abundance estimates and length distribution) data. This ... Read more
2013 Update of the Reference Set of Operating Models used in testing Candidate OMPs for the South African hake resource

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: 2013 A 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
2013 update of the South African hake reference case assessment

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: 2013 The 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
The abundance of blue whales on the Madagascar Plateau, December 1996

Author: Best, Peter B ; Rademeyer, Rebecca A ; Burton, Chris ; Ljungblad, Don ; Sekiguchi, Keiko ; Shimada, Hiroyuki ; Thiele, Deborah ; Reeb, Desray ; Butterworth, Doug S Date: 2003 As part of the International Whaling Commission’s SOWER blue whale research programme, two sighting vessels, the Shonan Maru and the Shonan Maru No.2 , surveyed the Madagascar Plateau between 25° and 35°S, 40° and 45°E, in December 1996. A ... Read more
ADDENDUM: further SCAA/ASPM assessments of Gulf of Maine Cod including data for 2007 and exploring the impact of age-dependence in natural mortality

Author: Butterworth, Doug S ; Rademeyer, Rebecca A Date: 2008 Deadlines 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
Age-reading error matrices for Merluccius paradoxus and M. capensis

Author: Rademeyer, Rebecca A Date: 2009 The 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
Alternative stock structure hypotheses for the southern African hake resources

Author: Butterworth, Doug S ; Rademeyer, Rebecca A Date: 2006 This 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
And yet further candidate management procedure testing for the South African hake resource

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: 2010 This 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
Application of an Age-Structured Production Model to the Georges Bank Yellowtail Flounder. GARM-III working paper 2

Author: Butterworth, Doug S ; Rademeyer, Rebecca A Date: 2008 A 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
Assessment of and management procedures for the hake stocks off southern Africa

Author: Rademeyer, Rebecca A Date: 2003 The 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
Assessment of the South African Hake resource taking its two-species nature into account

Author: Rademeyer, Rebecca A ; Butterworth, Doug S ; Plagányi, Éva E Date: 2008 The 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
A Bayesian assessment of the South Atlantic population of albacore which explicitly models changes in targeting

Author: Rademeyer, Rebecca A ; Butterworth, Doug S ; Penney, Andrew J Date: 2004 The 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
Building a bridge between the May and the September Reference Cases for the South African resource and related matters

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: Sep 2016 An 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 more c b
Building a bridge between the May and the September Reference Cases for the South African resource and related matters

Author: Rademeyer, Rebecca A ; Butterworth, Doug S Date: Sep 2016 An 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 more c b

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