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Research Output

2017

Research Papers and Refereed Articles

Best, P., Tormosov, D., Brandão, A. and Mikhalev, Y. Geographical variation in the body size of adult female sperm whales (Physeter macrocephalus) – an example of McNab’s resource rule. Mammalia, 81(2) 189-196. 
Ansorge, I.J., Skelton, P., Bekker, A., de Bruyn, P.J.N, Butterworth, D.S., Cilliers, P., Cooper, J., Cowan, D.A., Dorrington, R., Fawcett, S., Fietz, S.F., Ken P., Froneman, P.W., Grantham, G.H., Greve, M., Hedding, D., Hofmeyr, G.J., Kosch, M., le Roux, P., Lucas, M., MacHutcho, K., Meiklejohn, I., Nel, W., Pistorius, P., Ryan, P., Stander, J., Swart, S., Treasure, A., Vichi, M., Jansen van Vuuren, B. Exploring South Africa’s southern frontier: A 20-year vision for Polar Research through the South African National Antarctic Programme. SA Journal of Science, 113 (5/6): 1-7.
Squires, D., Maunder, M., Allen, R., Andersen, P., Astorkiza, K., Butterworth, D.S., Caballero, G., Clarke, R., Ellefsen, H., Guillotreau, P.,Hampton, J., Hannesson, R., Havice, E., Helvey, M., Herrick, S., Hoydal, K., Maharaj, V., Metzner, R., Mosqueira, I., Parma, A., Prieto-Bowen, I., Restrepo, V., Sidique, S.F., Steinsham, S.I., Thunberg, E., del Valle, I. and Vestergaard, N. Effort rights-based management. Fish and Fisheries 18(3): 440-465.
Advanced Access
de Moor, C.L., Butterworth, D.S. and van der Lingen, C.D. 2016. The quantitative use of parasite data in multistock modelling of South African sardine (Sardinops sagax). Canadian Journal of Fisheries and aquatic Sciences. dx.doi.org/10.1139/cjfas-2016-0280


Unpublished Research/Technical/Policy Documents

Brandão, A. Precision of 5th percentiles of West Greenland bowhead whales. International Whaling Commission, SC/67A/AWMP/04: 13pp.
Brandão, A. Potential SLAs for West Greenland fin whales testing against the agreed evaluation trials. International Whaling Commission, SC/67A/AWMP/12: 7pp.
Punt, A.E. and Brandão, A. Results of trials to evaluate the interim allowance strategy for West Greenland humpback whales, International Whaling Commission, SC/67A/AWMP/01: 23pp.

PowerPoint Presentations

Butterworth, D.S. On the benefits of harvest strategies. PEW video on MSE.
de Moor, C.L. South African Fisheries management: World Leaders or World Followers. Presented to the SNAPP working group: Measuring the status of fisheries and factors leading to success, Seattle, USA, 1 June 2017: 19pp.
de Moor, C.L. A proposal for determining the final desirable maximum catch of directed sardine west of Cape Agulhas. Small Pelagic SWG Meeting, 27 June 2017: 11pp.
Rademeyer, R.A. and Butterworth, D.S. A spatial box model of SA hake with explicit movement. Presentation to the BCC ECOFISH Synthesis Workshop, 29-31 May, DAFF, Cape Town: 8pp.
Rademeyer, R.A. and Butterworth, D.S. The SCAA assessment of SA hake. Presentation to the BCC ECOFISH Synthesis Workshop, 29-31 May, DAFF, Cape Town: 12pp.
Ross-Gillespie, A. and Butterworth, D.S. Modelling hake predation explicitly. Presentation to the BCC ECOFISH Synthesis Workshop, 29-31 May, DAFF, Cape Town: 10pp.

Southern Bluefin Tuna

Takahashi, N., Sakai, O., Kurota, H., Itoh, T. and Butterworth, D.S. A check of operating model predications from the viewpoint of the management procedure implementation in 2017. Southern bluefin tuna document: CCSBT-ESC/1708/27: 9pp.

Greenland Halibut

Rademeyer, R.A. and Butterworth, D.S. Management procedures for Greenland halibut. NAFO SCR Doc 17/003REV: 13pp.
Rademeyer, R.A. and Butterworth, D.S. Examples of management procedure outputs for Greenland halibut. NAFO SCR Doc 17-05REV: 11pp.
Rademeyer, R.A. and Butterworth, D.S. Results for initial candidate management procedure testing for Greenland halibut. NAFO SCR Doc 17-026REV: 41pp.
Rademeyer, R.A. and Butterworth, D.S. Statistical catch-at-age operating models for the Greenland halibut resource. NAFO SCR Doc 17-035REV: 46pp.
Rademeyer, R.A. and Butterworth, D.S. CMP projections under XSA in comparison to the SCAA baseline (OMO). NAFO SCR Doc 17-037REV: 13pp.
Rademeyer, R.A. and Butterworth, D.S. SCAA MSY evaluation methodology for Greenland halibut. NAFO SCR Doc 17-046: 2pp


Tristan

Butterworth, D.S. and Johnston, S.J. Recommendations on rock lobster TACs for the Tristan group of islands for the 2017/18 season. MARAM document: MARAM/TRISTAN/2017/AUG/09: 8pp.

Butterworth, D.S. and Johnston, S.J. Recommendations on rock lobster TACs for the Tristan group of islands for the 2017/18 season. MARAM document: MARAM/TRISTAN/2017/AUG/10: 1pp.
Johnston, S.J. Workplan for 2017 w.r.t. Tristan rock lobster. MARAM document: MARAM/TRISTAN/2017/JAN/01: 1pp.
Johnston, S.J. Developing an OMP for Nightingale. MARAM document: MARAM/TRISTAN/FEB/02: 2pp.
Johnston, S.J. Tristan Group Biomass Survey (Leg1) results including data from the 2016 season. MARAM document: MARAM/TRISTAN/2017/FEB/03: 16pp.
Johnston, S.J. and Butterworth, D.S. Updated (and rescaled) Tristan GLM-standardised lobster CPUE to take account of data for the 2016 season. MARAM document: MARAM/TRISTAN/2017/MAY/04: 9pp.
Johnston, S.J. The amended Tristan OMP. MARAM document: MARAM/TRISTAN/2017/MAY/05: 1pp.
Johnston, S.J., Brandão, A. and Butterworth, D.S. Updated 2017 GLMM-standardised lobster CPUE from the Tristan da Cunha outer group of islands. MARAM document: MARAM/TRISTAN/2017/MAY/06: 14pp.
Johnston, S.J. and Butterworth, D.S. Updated 2017 Nightingale island rock lobster assessment. MARAM document: MARAM/TRISTAN/2017/MAY/07: 22pp.
Johnston, S.J. and Butterworth, D.S. Initial OMP candidates for the Nightingale rock lobster fishery. MARAM document: MARAM/TRISTAN/2017/JUL/08: 11pp.

Consultancy and Other Activities Based on Expertise Developed in Research

de Moor, C.L. The OMP-14 constraints, with straw-dog extrapolation to two-area candidate MPs. DAFF Branch Fisheries document: FISHERIES/2017/FEB/SWG-PEL/02: 6pp.
de Moor, C.L. and de Goede, J. TABs in OMP-17. DAFF Branch Fisheries document: FISHERIES/2017/FEB/SWG-PEL/03: 4pp.
de Moor, C.L. Draft simulation testing framework to be used during the development of OMP-17. DAFF Branch Fisheries document: FISHERIES/2017/FEB/SWG-PEL/04: 27pp.
de Moor, C.L. Sardine stock-recruit relationships. DAFF Branch Fisheries document: FISHERIES/2017/FEB/SWG-PEL/05: 4pp.
de Moor, C.L. Draft objectives for the management of the South African pelagic fishery for anchovy and sardine, using OMP-17. DAFF Branch Fisheries document: FISHERIES/2017/JUN/SWG-PEL/16: 5pp.
de Moor, C.L. A proposal for determining the final desirable maximum catch of directed sardine west of Cape Agulhas during 2017. DAFF Branch Fisheries document: FISHERIES/2017/JUN/SWG-PEL/18: 20pp.
de Moor, C.L. The agreed method to determine the maximum sardine catch west of Cape Agulhas during 2017. DAFF Branch Fisheries document: FISHERIES/2017/JUN/SWG-PEL/19: 3pp.
de Moor, C.L. Final anchovy and sardine TACs and TABs for 2017, using OMP-14. DAFF Branch Fisheries document: FISHERIES/2017/JUL/SWG-PEL/22: 5pp.
Johnston, S.J. and Butterworth, D.S. West coast rock lobster projections to 2021 under the current TAC 2016 levels. DAFF Branch Fisheries document: FISHERES/2017/JAN/SWG-WCRL/01: 6pp.
Johnston, S.J. and Butterworth, D.S. Inshore versus offshore split of available quota. DAFF Branch Fisheries document: FISHERES/2017/JAN/SWG-WCRL/02: 18pp.
Johnston, S.J. Biomass trajectories under different future catch scenarios. DAFF Branch Fisheries document: FISHEREIS/2017/JUL/SWG-WCRL/06: 3pp.
Johnston, S.J. and Butterworth, D.S. 2017 updated south coast rock lobster assessment results. DAFF Branch Fisheries document: FISHERIES/2017/AUG/SWG-SCRL/06: 16pp.
Johnston, S.J. and Butterworth, D.S. The 2017 horse mackerel updated assessment. DAFF Branch Fisheries document: FISHERIES/2017/SEP/SWG-DEM/31: 12pp.
Rademeyer, R.A. and Butterworth, D.S. Specifications of the South African hake 2016 Reference Case assessment. DAFF Branch Fisheries document: FISHERIES/2017/FEB/SWG-DEM/07: 43pp.
Rademeyer, R.A. and Butterworth, D.S. A spatially structured stock assessment for the South African hake resource with movement based on a gravity model, and including fitting to outputs from the GeoPop Model. DAFF Branch Fisheries document: FISHERIES/2017/JUL/SWG-DEM/15: 56pp.
Rademeyer, R.A. Data needed for the baseline stock assessment update, the 2018 TAC recommendation, and for OMP revision for the South African hake resource. DAFF Branch Fisheries document: FISHERIES/2017/SEP/SWG-DEM/33: 2pp.
Ross-Gillespie, A., Fourie, A., Butterworth, D.S. and Bergh, M. Modelling hake cannibalism and inter-species predation: Comments from the 2016 International Stock Assessment Workshop, progress to date, and pending work. DAFF Branch Fisheries document: FISHERIES/2017/FEB/SWG-DEM/08: 2pp.

Theses

Moosa, N. An updated model of the krill-predator dynamics of the Antarctic ecosystem. MSc thesis. University of Cape Town: 251pp.