Research Papers and Refereed Articles
Cochrane, K.L., Butterworth, D.S., Hilborn, R., Parma, A.M., Plagányi, E.E. and Sissenwine, M.P. Errors and bias in marine conservation and fisheries literature: their impact on policies and perceptions. Marine Policy 168 (2024) 106329
Cochrane, K.L., Butterworth, D.S., Hilborn, R., Parma, A.M., Plagányi, E.E. and Sissenwine, M.P. Response to rejoinder to: Cochrane et al., Errors and bias in marine conservation and fisheries literature. Their impact on policies and perceptions [Mar. Policy 168 (2024) 106329]. Marine Policy 172 (2025) 106515: 3pp.
de Moor, C.L. Explicitly incorporating ecosystem-based fisheries management into management strategy evaluation, with a focus on small pelagics. Canadian Journal of Fisheries and Aquatic Sciences 81:1122-1134.
Eggers, J.M., Johnston, S.J. and Cochrane, K.L. The ecological and socioeconomic implications of future total allowable catch decisions and illegal fishing scenarios for South Africa’s West Coast rock lobster fishery. Marine Policy 170 (2024) 106399.
Moosa, N. and Butterworth, D.S. Investigating the influence of minor krill-predators on the krill-predator dynamics of the Antarctic ecosystem in the International Whaling Commission’s Management Area II. Canadian Journal of Fisheries and Aquatic Sciences 81(8): 1066-1080.
Ortega-Cisneros, K., de Moor, C.L., Cochrane, K. Linking the movement of South African sardine and anchovy to environmental variables using a model of intermediate complexity. Fisheries Research. 275: 107001. https://doi.org/10.1016/j.fishres.2024.107001.
Unpublished Research/Technical/Policy Documents
Brandão, A., Ross-Gillespie, A., Charlton, C and Butterworth, D.S. Preliminary demographic estimates for southern right whales off Australia using the common model and comparison to the South African population. SC/69B/SH/14: 34pp.
PowerPoint Presentations
Butterworth, D.S. Beyond harvest control rules. Overview – HCR vs. MP vs. HS. Presentation made at the FAO ABNJ harvest strategy webinar on Jan 25 2024: 13pp.
Butterworth, D.S. and Rademeyer, R.A. Using MSE to support long-term sustainable management of 4VWX herring. Presentation to Canadian DFO officials, 18 June 2024: 16pp.
Cochrane, K. and Butterworth, D.S. Errors and bias in marine conservation and fisheries literature: Their impact on policies and perceptions. Presentation to the North Sea Advisory Council Ecosystem Working Group meeting, 30 October 2024: 12pp.
de Moor, C.L. Explicitly Incorporating Ecosystem-Based Fisheries Management (EBFM) into Management Strategy Evaluation (MSE). Presentation made at the World Fisheries Congress, Seattle, USA, 7 March 2024: 25pp.
de Moor, C.L. Sustaining both the South African sardine and fishery despite shifting distributions and revised stock structure. Presentation made at the World Fisheries Congress, Seattle, USA, 7 March 2024: 12pp.
de Moor, C.L. Updated model of the revised South African sardine stock structure hypothesis, with initial results. Presentation to the Small Pelagic Scientific Working Group, 19 August 2024: 14pp.
de Moor, C.L. Initial results towards a new ‘benchmark’ assessment of the South African anchovy resource. Presentation to the Small Pelagic Scientific Working Group, 19 August 2024: 23pp.
de Moor, C.L. What is the current status of small pelagic fish within the Southern Benguela Ecosystem. Presentation to the 7th International Marine Conservation Congress, 15 October 2024: 15pp.
de Moor, C.L. Explicitly incorporating Ecosystem-Based Fisheries Management (EBFM) into Management Strategy Evaluation (MSE). Presentation to the HarvestStrategies.org webinar on ‘Management Procedures for Small Tunas’, 24 October 2024: 23pp.
Ortega-Cisneros, K., de Moor, C.L and Cochrane, K. Exploring the impact of fishing and climate scenarios on the South African sardine and anchovy fishery. Presentation made at the World Fisheries Congress, Seattle, USA, 7 March 2024: 16pp.
Greenland Halibut
Rademeyer, R.A. and Butterworth, D.S. Results for Greenland Halibut Candidate Management Procedure Trials for the final SCAA Reference Set trials. NAFO SCR Doc. 24/001REV: 16pp.
Rademeyer, R.A. and Butterworth, D.S. Comparing results for the proposed revised Green Halibut Candidate Management Procedure for the final SCAA and SSM Robustness trials. NAFO SCR Doc 24/003: 5pp.
Rademeyer, R.A. The effect of excluding EU 3L survey from the proposed Greenland halibut MP’s TAC computations. NAFO SCR Doc. 24/033. 2pp.
Gulf Menhaden
Butterworth, D.S. and Rademeyer, R.A. Application of MSE to Gulf Menhaden to address issues related to MSC certification of ecosystem-related reference points. Central component of a report to the Marine Stewardship Council on Gulf Menhaden Reference Point and Sustainability Certification, 28 October 2024, 18pp.
Tristan
Johnston, S.J. Tristan Group Biomass Survey results of Jasus tristani including data from the 2023 season. MARAM document: MARAM/TRISTAN/2024/FEB/01: 15pp.
Johnston, S.J. and Butterworth, D.S. Updated 2023 GLMM-standardised lobster CPUE from Inaccessible, Nightingale and Gough islands from the Jasus tristani fishery. MARAM document: MARAM/TRISTAN/2024/APR/02: 17pp.
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 2023 season. MARAM document: MARAM/TRISTAN/2024/APR/03: 10pp.
Johnston, S.J. and Butterworth, D.S. Recommendations on rock lobster TACs for Tristan rock lobster Jasus tristani, at Tristan and Nightingale islands for the 2023/24 season. MARAM document: MARAM/TRISTAN/2024/APR/04: 7pp.
Johnston, S.J. Recommendations on rock lobster TACs for Tristan rock lobster, Jasus tristani, at Gough and Inaccessible islands for the 2024/25 season. MARAM document: MARAM/TRISTAN/2024/MAY/05: 7pp.
Johnston, S.J. Summary of recommendations on Jasus tristani rock lobster TACs for the Tristan group of islands for the 2024/25 season. MARAM document: MARAM/TRISTAN/2024/MAY/06: 2pp.
Johnston, S.J. Updated Inaccessible Island assessments. MARAM document: MARAM/TRISTAN/2024/JUL/07: 28pp.
Johnston, S.J. Revised 2024 assessment of Jasus tristani rock lobster at Gough Island. MARAM document: MARAM/TRISTAN/2024/JUL/08: 28pp.
Johnston, S.J. Inaccessible CMP testing results. MARAM document: MARAM/TRISTAN/2024/JUL/09: 12pp.
Johnston, S.J. OMP candidates for a new OMP-2024 for Gough Island lobster. MARAM document: MARAM/TRISTAN/2024/AUG/10: 11pp.
Johnston, S.J. TACs for Tristan rock lobster, Jasus tristani, at Gough and Inaccessible islands for the 2024/25 season. MARAM document: MARAM/TRISTAN/2024/OCT/11: 6pp.
Johnston, S.J. Summary of recommendations on Jasus tristani rock lobster TACs for the Tristan group of islands for the 2024/25 season. MARAM document: MARAM/TRISTAN/2024/OCT/12: 2pp.
Consultancy and Other Activities Based on Expertise Developed in Research
Brandão, A. and Butterworth, D.S. The way forward to model pack data for the chokka squid (Loligo reynaudii) resource of South Africa. DFFE Fisheries document: FISHERIES/2024/FEB/SWG-SQ/05: 14pp.
Brandão, A. and Butterworth, D.S. Comparison of further CPUE and FIAS abundance indices for Zones A to D and the 2016 model-projections values. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-AB/02: 5pp.
Brandão, A. and Butterworth, D.S. Updated GLMM standardisation of the commercial abalone CPUE for Zones A-D over the period 1980-2020. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-AB/03: 10pp.
Brandão, A. and Butterworth, D.S. Estimated poaching trends up to 2023 for west coast rock lobster. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-WCRL/07: 14pp.
Brandão, A. and Butterworth, D.S. Analyses of the Fisheries Independent Monitoring Survey data for the west coast rock lobster resource of South Africa to include the 2023/24 season. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-WCRL/08: 36pp.
Brandão, A. and Butterworth, D.S. Update of the Reference case assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward islands vicinity to include 2023 data. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-DEM/20: 14pp.
Butterworth, D.S. and Ross-Gillespie, A. Motivation for and fundamentals of present MICE approaches to investigate possible causes of the decline in penguin abundance. DFFE Fisheries document: FISHERIES/2024/JAN/SWG-PEL/02: 9pp.
Butterworth, D.S., Ross-Gillespie, A. and Coetzee, J. Can CPUE inform on anchovy recruitment strength? Update of results presented in FISHERIES/2020/JUL/SWG-PEL/59. DFFE Fisheries document: FISHERIES/2024/SEP/SWG-PEL/42rev: 8pp.
Butterworth, D.S. and Ross-Gillespie, A. A robust estimate of recent total anchovy and sardine abundance. DFFE Fisheries document: FISHERIES/2024/SEP/PWG/43: 4pp.
Butterworth, D.S. and Ross-Gillespie, A. Update of the simple variants of the SA hake Reference Case Operating Model to take account of Namibian M. paradoxus catches and survey data. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-DEM/19: 18pp.
Butterworth, D.S., Ross-Gillespie, A. and Coetzee, J. Attempting to estimate the 2024 survey results using abundance estimates. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/51: 13pp.
Coetzee, J.C. and Butterworth, D.S. Simple round-herring projections for November 2024 and implications of not conducting a November biomass survey. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/47: 7pp.
Coetzee, J.C. and Butterworth, D.S. Simple sardine projections for November 2024 and estimated costs of not conducting a 2024 biomass survey. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/48rev: 11pp.
Coetzee, J.C. and de Moor, C.L. Suggested approach for calculating potential lost catch if there is no November 2024 biomass survey. DFFE Fisheries document: FISHERIES/2024/SEP/SWG-PEL/49rev: 3pp.
Coetzee, J.C., Butterworth, D.S., de Moor, C.L. and Durholtz, D. Summary cost implications of not conducting a November 2024 small pelagic biomass survey with comments on the financial benefits of having conducted the 2024 demersal surveys. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/53: 7pp.
de Moor, C.L. A method to convert the hydroacoustic survey estimates of small pelagic biomass from a February/March 2024 survey to equivalent biomasses that might have been surveyed in November 2023, for use in 2024 fisheries management advice. DFFE Fisheries document: FISHERIES/2024/JAN/SWG-PEL/01: 6pp.
de Moor, C.L. Using the hydroacoustic survey estimates of anchovy and round herring biomass west of Cape Agulhas to update the interim catch limits. DFFE Fisheries document: FISHERIES/2024/MAR/SWG-PEL/07: 2pp.
de Moor, C.L. Round herring PUCL recommendation for 2024. DFFE Fisheries document: FISHERIES/2024/MAR/SWG-PEL/13: 1pp.
de Moor, C.L. Initial anchovy TAC recommendation for 2024, using OMP-18rev. DFFE Fisheries document: FISHERIES/2024/MAR/SWG-PEL/14rev: 4pp.
de Moor, C.L. Updated assessment of the South African sardine resource using data from 1984-2023. DFFE Fisheries document: FISHERIES/2024/MAR/SQG-PEL/15rev: 36pp.
de Moor, C.L. Sardine projections based on constant catch scenarios for 2024. DFFE Fisheries document: FISHERIES/2024/MAR/SWG-PEL/16: 41pp.
de Moor, C.L. November survey CVs simulated for anchovy during OMP-18rev testing. DFFE Fisheries document: FISHERIES/2024/MAR/SWG-PEL/19: 2pp.
de Moor, C.L. Final anchovy TAC for 2024, using OMP-18rev. DFFE Fisheries document: FISHERIES/2024/JUL/SWG-PEL/31: 4pp.
de Moor, C.L. Updated model of the revised South African sardine stock structure hypothesis. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-PEL/32: 17pp.
de Moor, C.L. Initial results from the revised population dynamics model of the two stock, two area South African sardine resource. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-PEL/33: 17pp.
de Moor, C.L. The data used in the 2024 anchovy assessment. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-PEL/34: 15pp.
de Moor, C.L. Initial results towards a new ‘benchmark’ assessment of the South African anchovy resource. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-PEL/35: 39pp.
de Moor, C.L., Merkle, D., Coetzee, J. and van der Lingen, C.D. The data used in the 2024 sardine assessment. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/40: 31pp.
de Moor, C.L. Further testing of the model for the revised South African sardine stock structure hypothesis. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/41: 83pp.
de Moor, C.L., Coetzee, J. and Butterworth, D.S. Calculating an informative prior distribution for the bias of hydro-acoustic survey estimates of the biomass of the South African anchovy. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/45: 8pp.
de Moor, C.L. Possible implication of no hydro-acoustic survey estimate of biomass in November 2024 on the anchovy TAC in 2025. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-PEL/46: 9pp.
Johnston, S.J. Updating the 2024 south coast rock lobster assessment. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-SCRL/1: 32pp.
Johnston, S.J. Projection results for the south coast rock lobster resource. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-SCRL/03: 2pp.
Johnston, S.J. Overall poaching time series for west coast rock lobster, resulting from combining estimates of illegally exported and locally sold lobsters with compliance time series. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-WCRL/10: 13pp.
Johnston, S.J. and Butterworth, D.S. Updated 2024 assessments of the west coast rock lobster resource. DFFE Fisheries document: FISHERIES/2024/AUG/SWG-WCRL/11: 22pp.
Johnston, S.J. and Butterworth, D.S. Projections of the west coast rock lobster resource using the 2024 stock assessments. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-WCRL/15: 6pp.
Johnston, S.J. Calculation of the horse mackerel demersal by-catch reserve for 2025. DFFE Fisheries document: FISHERIES/2024/OCT/SWG-DEM/12 addendum: 1pp.
Ross-Gillespie, A. and Butterworth, D.S. Conditioning results for the 2024 Hake Reference Set. DFFE Fisheries document FISHERIES/2024/OCT/SWG-DEM/15rev. 38pp.
Ross-Gillespie, A. and Butterworth, D.S. OMP formula output for the 2025 hake TAC, and the inclusion of the 2023 commercial and 2025 survey data in the OMP projection plots. DFFE Fisheries document FISHERIES/2024/OCT/SWG-DEM/16. 7pp.
Ross-Gillespie, A. and Butterworth, D.S. Report on review of stock assessment related to abalone ranching in Zone EC1 with consequent recommendations. Report to Anchor Environmental and DFFE.
