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Browsing by Author "de Moor, C L"

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A summary of the South African sardine (and anchovy) fishery. MARAM/IWS/2019/Sardine/BG1

Author: Coetzee, J C ; de Moor, C L ; Butterworth, Doug S Date: 2019 The sardine fishery is an important component of the South African purse-seine fishery, the largest commercial fishery in South Africa (by landed mass). This fishery, initially established on the West Coast, but with some subsequent infrastructure ... Read more
The Agreed Method to Determine the Maximum Sardine Catch West of Cape Agulhas During 2017

Author: de Moor, C L Date: Jun 2017 This document details the method agreed at the Small Pelagic Scientific Working Group meeting on 27th June 2017 to be used to inform the maximum directed >14cm sardine catch to be recommended to be caught west of Cape Agulhas during 2017. The ... Read more
Assessing the South African sardine resource: two stocks rather than one?

Author: de Moor, C L ; Butterworth, Doug S Date: 2015 Sardine Sardinops sagax distributed off the west and south coasts of South Africa have traditionally been assumed to comprise a single well-mixed stock for assessment and management purposes. New research, however, lends weight to the possibility ... Read more
Assessment of the South African sardine resource using data from 1984-2015: Results at the joint posterior mode for the single stock hypothesis

Author: de Moor, C L ; Butterworth, Doug S Date: Jul 2016 The assessment of the South African sardine resource has been revised and updated using data available up to November 2015. Two primary hypotheses regarding the sardine stock structure have been agreed for investigation. The first considers ... Read more c b
Assessment of the South African sardine resource using data from 1984-2015: Results at the joint posterior mode for the two mixing-stock hypothesis.

Author: de Moor, C L ; Butterworth, Doug S Date: Jul 2016 The Operating Model (OM) for the South African sardine resource has been updated from that used to develop OMP-14 given four more years of data. The model has been altered from previous assessments to now model infection of sardine by a ... Read more
Discussion of OMP-17 simulation projection framework in respect of sardine

Author: de Moor, C L ; Butterworth, Doug S ; Coetzee, J C Date: Sep 2016 The simulation projection framework to be used to test Candidate Management Procedures for OMP-17 is yet to be developed (cf de Moor and Butterworth (2013a) for the framework used when developing OMP-14). However, given experience gained ... Read more
Effective fisheries management instrumental in improving fish stock status

Author: Hilborn, R ; Amoroso, R O ; Anderson, C M ; Baum, J K ; Branch, T A ; Costello, C ; de Moor, C L ; Faraj, A ; Hively, D ; Jensen, O P ; Kurota, H ; Little, L R ; Mace, P ; McClanahan, T ; Melnychuk, M C ; Minto, C ; Osio, G C ; Parma, A M ; Pons, M ; Segurado, S ; Szuwalski, C ; Wilson, J R ; Ye, Y Date: 2020 Marine fish stocks are an important part of the world food system and are particularly important for many of the poorest people of the world. Most existing analyses suggest overfishing is increasing, and there is widespread concern that ... Read more
A proposal for determining the final desirable maximum catch of directed sardine west of Cape Agulhas during 2017

Author: de Moor, C L Date: Jun 2017 The maximum directed >14cm sardine catch recommended to be caught west of Cape Agulhas during 2017 was initially set at 21 400t (DAFF 2016) based on the method set out in de Moor and Butterworth (2016). The mid-year revision in the South ... Read more
A proposal for determining the initial desirable maximum catch of directed sardine west of Cape Agulhas during 2017, with suggestions on how this might be achieved

Author: de Moor, C L ; Butterworth, Doug S Date: Dec 2016 Butterworth (2016) outlined a draft process for setting the initial directed >14cm sardine TAC for 2017. This document expands on the detail of that draft process, with some changes/updates. Further, it provides initial projections from ... Read more
Refined estimates of South African pelagic fish biomass from hydro-acoustic surveys: quantifying the effects of target strength, signal attenuation and receiver saturation

Author: Coetzee, J C ; Merkle, D ; de Moor, C L ; Twatwa, N M ; Barange, M ; Butterworth, Doug S Date: 2008 The biomass of small pelagic fish species off the coast of South Africa has been monitored since 1984 using hydro-acoustic survey techniques. These time-series of spawner biomass and recruitment estimates form the basis for management of both ... Read more
TABs in OMP-17

Author: de Moor, C L ; de Goede, J Date: Feb 2017 Read more
The two mixing stock hypothesis for South African sardine without an assumed stock-recruit relationship

Author: de Moor, C L Date: Nov 2016 The two mixing stock hypotheses for South African sardine presented in de Moor and Butterworth (2016) and de Moor (2016) assumed a Hockey-Stick stock-recruit relationship, with the stock-recruit parameters estimated to differ by “effective ... Read more