Research Papers and Refereed Articles
Butterworth, D. S. and Ross-Gillespie A. Comment on “South Africa's experimental fisheries closures and recovery of the endangered African penguin” by Sydeman et al. (2021), ICES Journal of Marine Science, 2022;, fsac113,
https://doi.org/10.1093/icesjms/fsac113 Butterworth, D. S. and Ross-Gillespie A. Supplementary Information to Comment on “South Africa’s experimental fisheries closures and recovery of the endangered African penguin” by Sydeman et al. (2021). ICES Journal of Marine Science, 0: 36pp. (article DOI:
10.1093/icesjms/fsac113)
de Moor, C.L., Butterworth, D.S. and Johnston, S. Learning from three decades of Management Strategy Evaluation in South Africa, ICES Journal of Marine Science, 2022;, fsac114,
https://doi.org/10.1093/icesjms/fsac114 Hilborn, R., Acuña, E.D., Buratti, C.C., Hively, D., Kolding, J., Kurota, H., Baker, N., Mace, P.M., de Moor, C.L., Muko, S., Osio, G.C., Parma, A.M., Quiroz, J-C. and Melnychuk, M.C. Recent trends in abundance and fishing pressure of data rich small pelagic fish stocks. Fish and Fisheries. 2022;00: 1–19.
doi: 10.1111/faf.12690
Non-Peer reviewed published Conference Proceedings
Butterworth, D.S. and Rademeyer, R.A. Further refinements of the BR CMP. SCRS/2021/018. Collect. Vol. Sci. Pap. Vol 78(3): 146-158.
Butterworth, D.S., Rademeyer, R.A. and Carruthers, T.R. On comparing CMPs across different development tunings and the associated pertinence of OM weighting. SCRS/2021/022. Collect. Vol. Sci. Pap. Vol 78(3): 181-197.
Butterworth, D.S. and Rademeyer, R.A. Yet further refinements of the BR CMP. SCRS/2021/042. Collect. Vol. Sci. Pap. Vol 78(3): 477-505.
Butterworth, D.S. and Rademeyer, R.A. Refinements of the BR CMP as at July 2021. SCRS/2021/121. Collect. Vol. Sci. Pap. Vol 78(3): 590-615.
Butterworth, D.S. and Rademeyer, R.A. Short-term constant catch projections for the Atlantic bluefin stocks based on the reconditioned MSE Operating Models. SCRS/2021/143. Collect. Vol. Sci. Pap. Vol 78(3): 798-805.
Butterworth, D.S. and Rademeyer, R.A. Refinement of the BR CMP as at August 2021. SCRS/2021/152. Collect. Vol. Sci. Pap. Vol 78(3): 1073-1097.
Butterworth, D.S. and Rademeyer, R.A. Refinements of the BR CMP as of April 2022. SCRS/2022/082. Collect. Vol. Sci. Pap. Vol 79(3): 345-354.
Butterworth, D.S. and Rademeyer, R.A. BR CMP as at June 2022. SCRS/2022/126. Collect. Vol. Sci. Pap. Vol 79(3): 587-597.
Butterworth, D.S. and Rademeyer, R.A. BR CMP as at end August 2022. SCRS/2022/154. Collect. Vol. Sci. Pap. Vol 79(3): 813-824.
Peterson, C., Walter, J. and Butterworth, D.S. Results, features and interpretations of the four remaining BFT MSE candidate management procedures. SCRS/2022/169. Collect. Vol. Sci. Pap. Vol 79(3): 914-944.
Butterworth, D.S. and Rademeyer, R.A. The BR CMP as submitted to the September 2022 Bluefin Species Group meeting. SCRS/2022/183. Collect. Vol. Sci. Pap. Vol 79(3): 963-975.
Unpublished Research/Technical/Policy Documents
Allison, C., de Moor, C.L., Katara, I. and Punt, A.E. Ongoing work towards an in-depth assessment of western North Pacific minke whales. International Whaling Commission: SC/68D/IA/07: 67pp.
PowerPoint Presentations
Brandão, A., Butterworth, D.S. and Johnston, S.J. Evaluation of three provisional harvest strategies and the development of a roadmap for formal harvest strategy (Project Code: SER2021-05). Report of TOR1 – Evaluation of three provisional harvest strategies. Presentation to the SIOFA SERA-WG4 meeting: 28 February - 4 March 2022: 19pp.
Butterworth, D.S. Why is fisheries management so difficult? Lecture 1 – The Basics. Presentation to the University of Cape Town Summer School, Thursday 13 January 2022: 48pp.
Butterworth, D.S. Why is fisheries management so difficult? Lecture 2 – The Controversies. Presentation to the University of Cape Town Summer School, Thursday 13 January 2022: 50pp.
Butterworth, D.S. Evaluation of three provisional harvest strategies and the development of a roadmap for formal harvest strategy (Project Code: SER2021-05). Report of TOR1 – Evaluation of three provisional harvest strategies. Presentation to the SIOFA SERA-WG4 meeting: 28 February - 4 March 2022: 19pp.
Butterworth, D.S. Developing a MP for Atlantic bluefin tuna. Presentation to Pew Zoom Webinar: ICCAT 2022: Securing a Sustainable Future for Atlantic Bluefin Tuna, 9 September 2022: 9pp.
Butterworth, D.S. The future of fisheries science: prospects and problems. Presentation to the Annual Meeting of the Fisheries Council of Canada, Ottawa, 6 October 2022: 16 pp.
Butterworth, D.S. and Ross-Gillespie, A. Hake shared stock. Presented to the International Stock Assessment Workshop, 28 November – 2 December 2022, University of Cape Town: 11pp.
de Moor, C.L. A summary of work towards anchovy-only OMP-18rev. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 16 March 2022: 10pp.
de Moor, C.L. A summary of sardine assessment and projection work towards SWG-PEL management procedures. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 16 March 2022: 14pp.
de Moor, C.L., van der Lingen, C. and Teske, P. A new hypothesis for South African sardine stock structure. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 14 June 2022: 7pp.
de Moor, C.L. How does society benefit from fisheries assessment within South Africa. Presentation to the South African Marine Science Symposium, Durban, 21 June 2022: 23pp.
de Moor, C.L. Further considering sardine and anchovy exploitation rates and relative depletion levels. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 26 August 2022: 6pp.
de Moor, C.L., Coetzee, J.C. and Butterworth, D.S. Developing informative prior distributions for the bias of hydro-acoustic survey estimates of the biomass of the SA round herring. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 26 August 2022: 10pp.
de Moor, C.L. Assessment of South African round herring: Initial results. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 26 August 2022: 24pp.
de Moor, C.L., Butterworth, D.S. and Cochrane, K. A note on risk definition and terminology, within the context of the next sardine-anchovy OMP. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 26 August 2022: 7pp.
de Moor, C.L. Including ecosystem considerations in the sardine-anchovy OMP. Virtual presentation to the Small Pelagic Scientific Working Group, Cape Town, 26 August 2022: 6pp.
de Moor, C.L. Including quantitative ecosystem objectives in Management Strategy Evaluation with examples from South Africa's small pelagic fishery. Session Plenary at the PICES/ICES Small Pelagic Fish Symposium, 9 November 2022, Lisbon, Portugal. https://meetings.pices.int/meetings/international/2022/pelagic/scope.
de Moor, C.L. and Coetzee, J.C. An Introduction to the South African Sardine Resource and Fishery. Presented to the International Stock Assessment Workshop, 28 November – 2 December 2022, University of Cape Town: 19pp.
de Moor, C.L. An Initial Simple Model of the Revised Stock Structure Hypothesis for South African Sardine. Presented to the International Stock Assessment Workshop, 28 November – 2 December 2022, University of Cape Town: 22pp.
Johnston, S.J. The west coast rock lobster fishery: A brief historical summary and introduction to matters to be discussed. Presented to the International Stock Assessment Workshop, 28 November – 2 December 2022, University of Cape Town: 24pp.
Moosa, N and Butterworth, D.S. Investigating the influence of ‘minor’ krill-predators on the krill-predator dynamics of the Antarctic ecosystem. Presentation to the Small Pelagic Fish: New Frontiers in Science for Sustainable Management symposium, Lisbon, Portugal, 9 November 2022: 24pp.
ICCAT Bluefin Tuna
Butterworth, D.S. and Rademeyer, R.A. Refinements of the BR CMP as at January 2022. Working paper for January 2022 ICCAT BFT MSE Informal workshop.
Greenland Halibut
Regular, P.M., Butterworth, D.S. and Rademeyer, R.A. Effect of missing values from the Canadian spring and fall surveys of NAFO Divisions 3LNO on the calculation of the TAC using the Greenland halibut HCR. NAFO SCR Doc. 22/015: 10pp.
SIOFA
Brandão, A., Butterworth, D.S. and Johnston, S.J. Initial results for comparing three approaches to set TACs for the major fisheries in the SIOFA area of the Southern Indian Ocean. (Project code SER2021-05). Report presented to the SIOFA SERA-WG4 meeting: 28 February - 4 March 2022: SERAWG-04-11: 32pp.
Butterworth, D.S. On the development of a roadmap for new formal harvest strategies for SIOFA. (Project code SER2021-05). SC-07-INFO-12. Report presented to the 7th meeting of the SIOFA Scientific Committee: 21-25 March 2022: 18pp.
Tristan
Johnston, S.J. and Butterworth, D.S. Updated von Bertalanffy growth functions following recent tagging data of Jasus tristani lobster. MARAM document. MARAM/TRISTAN/2022/MAR/01: 24pp.
Johnston, S.J. Tristan Group Biomass Survey results including data from the 2021 season. MARAM document. MARAM/TRISTAN/2022/MAR/02: 15pp.
Johnston, S.J. and Butterworth, D.S. Fishing patterns at Nightingale. MARAM document: MARAM/TRISTAN/2022/APR/03: 4pp.
Johnston, S.J. and Butterworth, D.S. GLM-standardised rock lobster (Jasus tristani) vessel CPUE at Tristan. MARAM document: MARAM/TRISTAN/2022/MAY/04: 7pp.
Johnston, S.J. and Butterworth, D.S. Updated (and rescaled) Tristan Island GLM-standardised Jasus tristani lobster Powerboat CPUE to take account of data for the 2021 season. MARAM document: MARAM/TRISTAN/2022/MAY/05: 10pp.
Johnston, S.J. and Butterworth, D.S. Updated 2021 GLMM-standardised lobster CPUE from Inaccessible, Nightingale and Gough islands from the Jasus tristani fishery. MARAM document: MARAM/TRISTAN/2022/MAY/06: 17pp.
Johnston, S.J. and Butterworth, D.S. Recommendations on rock lobster TACs for Tristan rock lobster Jasus tristani, Nightingale, Inaccessible and Gough islands for the 2022/23 season. MARAM document: MARAM/TRISTAN/2022/MAY/07: 9pp.
Johnston, S.J. and Butterworth, D.S. Summary of recommendations on Jasus tristani rock lobster TACs for the Tristan group of islands for the 2022/23 season. MARAM document: MARAM/TRISTAN/2022/MAY/08: 1pp.
Consultancy and Other Activities Based on Expertise Developed in Research
Brandão, A. and Butterworth, D.S. Data required for an updated assessment of the South African kingklip resource in 2022. DFFE Fisheries document: FISHERIES/2022/APR/SWG-DEM/03: 5pp.
Brandão, A. and Butterworth, D.S. GLMM standardised trotline CPUE series for the toothfish resource in the Prince Edward Islands EEZ updated to include data up to the 2021 season. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/20: 7pp.
Brandão, A. and Butterworth, D.S. Reference case assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity updated to include 2021 data. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/21: 12pp.
Brandão, A. and Butterworth, D.S. Application of OMP-2020 for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to provide a TAC recommendation for the 2023 “fishing” year. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/22: 5pp.
Brandão, A. and Butterworth, D.S. Updated compliance poaching trends for west coast rock lobster from modelling the “old” and the “new” databases simultaneously. DFFE Fisheries document: FISHERIES/2022/JUN/SWG-WCRL/09: 14pp.
Brandão, A. and Butterworth, D.S. Analyses of the Fisheries Independent Monitoring Survey data of the rock lobster resource of South Africa with the data split into various categories. DFFE Fisheries document: FISHERIES/2022/JUL/SWG/WCRL/17: 34pp.
Butterworth, D.S. and Johnston, S.J. MARAM comments on consultative Advisory Forum (CAF) recommendations for West Coast Rock Lobster. DFFE Fisheries document: FISHERIES/2022/APR/WCRL/01: 4pp.
Butterworth, D.S. Data requirements for initial mice approaches to investigate hypotheses for causes of the penguin decline. DFFE Fisheries document: FISHERIES/2022/JUL/SWG-PEL/17: 2pp.
Butterworth, D.S. and Ross-Gillespie, A. Comments on Sydeman et al.: African Penguins and Localised Fisheries Management: Response to Butterworth and Ross-Gillespie (ICES JMS 2022 DOI: 10.1093/icesjms/fsac116). DFFE Fisheries document: FISHERIES/2022/DEC/SWG-PEL/39: 45pp.
Butterworth, D.S., Glazer, J.P. and Durholtz, D.D. The sole assessment enigma. MARAM/IWS/2022/Sole/P1. 1pp.
Butterworth, D.S. A comment on addressing climate change using MSE. MARAM/IWS/2022/RefPts/WP1. 1pp.
Butterworth, D.S. and Ross-Gillespie, A. A summary of key issues relating to MSC queries about the assessment of deep-water hake (M. paradoxus) as a stock shared between South Africa and Namibia. MARAM/IWS/2022/Hake/P5. 8 pp.
Coetzee, J.C. and de Moor, C.L. Suggestions for setting interim TAC/Bs for 2023 in December 2022. DFFE Fisheries document: FISHERIES/2022/DEC/SWG-PEL/38: 9pp.
Coetzee, J.C., de Moor, C.L., van der Lingen, C.D. and Butterworth D.S. A summary of the South African sardine (and anchovy) fishery. MARAM/IWS/2022/Sardine/BG1. 19pp.
de Moor, C.L. Initial anchovy TAC recommendation for 2022, using OMP-18rev. DFFE Fisheries document: FISHERIES/2022/JAN/SWG-PEL/03: 2pp.
de Moor, C.L. Updating the sardine assessment based on information gained during the December 2021 survey. DFFE Fisheries document: FISHERIES/2022/JAN/SWG-PEL/04: 23pp.
de Moor, C.L. Sardine projections based on constant catch scenarios for 2022. DFFE Fisheries document: FISHERIES/2022/FEB/SWG-PE3L/05: 22pp.
de Moor, C.L., van der Lingen, C. and Teske, P.R. A new hypothesis for South African sardine stock structure. DFFE Fisheries document: FISHERIES/2022/MAY/SWG-PEL/11: 8pp.
de Moor, C.L. Further considering sardine and anchovy exploitation rates and relative depletion levels. DFFE Fisheries document: FISHERIES/2022/JUL/SWG-PEL/18: 7pp.
de Moor, C.L. Coetzee, J.C. and Butterworth, D.S. Developing informative prior distributions for the bias of hydro-acoustic survey estimates of the biomass of the South African round herring population. DFFE Fisheries document: FISHERIES/2022/JUL/SWG-PEL/19: 12pp.
de Moor, C.L., Merkle, D. and Coetzee, J.C. The data used in the 2022 assessment of South African round herring. DFFE Fisheries document: FISHERIES/2022/JUL/SWG-PEL/20rev: 17pp.
de Moor, C.L. Assessment of South African round herring: Initial results. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-PEL/21: 59pp.
de Moor, C.L. Considering the implications of a November 2021 survey estimate of sardine biomass east of Cape Agulhas. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-PEL/22: 12pp.
de Moor, C.L. Final anchovy TAC for 2022, using OMP-18rev. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-PEL/23: 3pp.
de Moor, C.L., Butterworth, D.S. and Cochrane, K. A note on risk definition and terminology, within the context of the next sardine-anchovy OMP. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-PEL/28: 3pp.
de Moor, C.L. Including ecosystem considerations in the sardine-anchovy OMP. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-PEL/29: 2pp.
de Moor, C.L. Suggestions for how recommendations for the 2023 sardine TAC should be calculated. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-PEL/31: 2pp.
de Moor, C.L. Initial testing of revised stock structure hypotheses for South African sardine. DFFE Fisheries document: FISHERIES/2022/SEP/SWG-PEL/32: 28pp.
de Moor, C.L. Finalised assessment of South African round herring, using data from 1987 to 2021. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-PEL/34: 33pp.
de Moor, C.L. Proposed adjustments to the Precautionary Upper Catch Limit rule for South African round herring. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-PEL/35: 15pp.
de Moor, C.L. An initial simple model of the revised stock structure hypothesis for South African sardine. DFFE Fisheries document: FISHERIES/2022/NOV/SWG-PEL/37 (Also MARAM/IWS/2022/Sardine/P4): 28pp.
de Moor, C.L. Updated assessment of the South African sardine resource using data from 1984-2020. International Stock Assessment Workshop Document MARAM/IWS/2022/Sardine/BG4. 35pp.
de Moor, C.L. Further results from an initial simple model of the revised stock structure hypothesis for South African sardine. International Stock Assessment Workshop Document MARAM/IWS/2022/Sardine/WP2. 13pp.
Johnston, S.J. and Butterworth, D.S. Required horse mackerel data for the 2022 updated assessment and assessment plans. DFFE Fisheries document: FISHERIES/2022/APR/SWG-DEM/04: 8pp.
Johnston, S.J. and Butterworth, D.S. Updated 2022 horse mackerel assessments and projections. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/25: 40pp.
Johnston, S.J., van Zyl, D. and Schultz, L. New Catch-At-Length data obtained since 2018 from trap samples. DFFE Fisheries document: FISHERIES/2022/JUN/SWG-WCRL/05: 2pp.
Johnston, S.J. and Butterworth, D.S. Overall poaching time series for west coast rock lobster, resulting from combining estimates of illegally exported and locally sold lobsters and compliance time series as at June 2021. DFFE Fisheries document: FISHERIES/2022/JUN/SWG-WCRL/13: 15pp.
Johnston, S.J. and Butterworth, D.S. Further 2022 poaching trends for west coast rock lobster. DFFE Fisheries document: FISHERIES/2022/JUL/SWG-WCRL/18: 11pp.
Johnston, S.J. and Butterworth, D.S. Updated 2022 assessments of the west coast rock lobster resource. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-WCRL/23: 28pp.
Johnston, S.J. and Butterworth, D.S. Updating the 2022 south coast rock lobster assessment. DFFE Fisheries document: FISHERIES/2022/JUN/SWG-SCRL/01: 40pp.
Johnston, S.J. and Butterworth, D.S. Further assessment results for the 2022 updated assessment of west coast rock lobster. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-WCRL/24: 8pp.
Johnston, S.J. and Butterworth, D.S. Initial 2022 projections of the west coast rock lobster resource. DFFE Fisheries document: FISHERIES/2022/AUG/SEG-WCRL/25: 7pp.
Johnston, S.J. and Butterworth, D.S. Predicted CPUE trends associated with OMP-2019 compared with recent observed and standardised values for the south coast rock lobster (Palinurus gilchrist) fishery). DFFE Fisheries document: FISHERIES/2022/JUL/SWG-SCRL/06: 2pp.
Johnston, S.J. South coast rock lobster TAC for the 2022 season. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-SCRL/07: 2pp.
Johnston, S.J. and Butterworth, D.S. A summary of key issues relating to the estimation of poaching trends for west coast rock lobster Jasus lalandii. MARAM/IWS/2022/WCRL/P1: 14 pp.
Johnston, S.J. and Butterworth, D.S. A summary of key issues relating to the fitting of FIMS data for west coast rock lobster Jasus lalandii. MARAM/IWS/2022/WCRL/P2: 19 pp.
Johnston, S.J. and Butterworth, D.S. The size-structured (length-based) stock assessment methodology applied to west coast rock lobster. MARAM/IWS/2022/WCRL/BG9: 15 pp.
Johnston, S.J. West coast rock lobster: sensitivities to poaching “marriage” model for the South. MARAM/IWS/2022/WCRL/WP1. 3 pp.
Ross-Gillespie, A. and Butterworth, D.S. Summary of the data available for the 2022 OMP revision, and the current biological assumptions for the Reference Set OMs. Fisheries Branch document FISHERIES/2022/APR/SWG-DEM/05. 2pp.
Ross-Gillespie, A. and Butterworth, D.S. Proposed approach for updating the Reference Set Operating Models to be used for the 2022 OMP revision. Fisheries Branch document FISHERIES/2022/APR/SWG-DEM/06. 2pp.
Ross-Gillespie, A. and Butterworth, D.S. Natural mortality-at-age vectors from the hake predation model to be used in the Reference Set Operating models for the OMP-2022 revision. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-DEM/11: 13pp.
Ross-Gillespie, A. and Butterworth, D.S. Conditioning results for the 2022 Hake Reference Set Operating Models for OMP testing. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-DEM/12: 27pp.
Ross-Gillespie, A. and Butterworth, D.S. Projection results for a selection of Candidate Management Procedures. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-DEM/13: 29pp.
Ross-Gillespie, A. and Butterworth, D.S. List of robustness tests for the hake OMP-2022 revision. DFFE Fisheries document: FISHERIES/2022/AUG/SWG-DEM/14: 9pp.
Ross-Gillespie, A. Corrected Reference Set conditioning results and updated CMP projection results. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/26: 25pp.
Ross-Gillespie, A. Updated results for an extended selection of Candidate Management Procedures. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/27: 23pp.
Ross-Gillespie, A. and Butterworth, D.S. Robustness tests results for the hake OMP-2022 revision. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/28: 22pp.
Ross-Gillespie, A. and Butterworth, D.S. Compatibility of the hake model with the longline CPUE data. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/29: 3pp.
Ross-Gillespie, A. and Butterworth, D.S. Road map for the 2022 hake OMP revision. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/30rev: 11pp.
Ross-Gillespie, A., Butterworth, D.S., Glazer, J.P. and Fairweather, T.P. The 2022 Operational Management Procedure for the South African Merluccius paradoxus and M. capensis Resources. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/34rev: 30pp.
Ross-Gillespie, A. Update to the hake Reference Case Operating Model with corrected longline data, and 2021 commercial and 2022 survey data. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/35rev: 15pp.
Ross-Gillespie, A. and Butterworth, D.S. Output from the South African Hake OMP-2022 for the 2023 TAC recommendation. DFFE Fisheries document: FISHERIES/2022/OCT/SWG-DEM/36rev: 6pp.
Media Articles
Butterworth, D.S. Penguin decline – victims, villains and heroes. News24, 8 October 2022: 7pp.
Butterworth, D.S. Pichegru on penguins – the wrong solutions for a very serious problem. Daily Maverick, 26 October 2022: 3pp.
Packages
de Moor, C.L. OMP-18-rev Package.
