Olrac - Summary of Written Contributions

The following list of documents serves as a summary of OLRAC's work over the last 15 years. The documents referred to vary from two page submissions, to larger documents in excess of 50 pages long. They reflect some of the written products of ongoing work, which includes close involvement with scientific deliberations debated at scientific workshops convened by the Marine and Coastal Management Directorate of the Department of Environmental Affairs and Tourism of South Africa.

This summary does not include the author's publications list.

South African fisheries policy studies:

The Management and Utilization of South Africa's Living Marine Resources Principles, Concepts and Policy Options. 1993
Operational Management Procedures in the new South African Marine Living Resources Bill. 1993
A policy document for the South African Pelagic fishing industry, 1994.
Options for the allocation of access rights for demersal resources in South Africa - practical lessons from other fisheries around the world. 1995
South Africa's fishing wealth - recent trends and options for the future. 1995
Recent challenges for the sustainable utilization of South Africa's marine fish resources. 1995
The role of policy in the development and management of the South African fishing industry. 1995
Report of the Access Rights Technical Committee, 8 December 1995 Implications for the development of a fisheries policy. 1996
The debate on access rights for South African fisheries. 1996
Policy proposals for the South African fishing industry. 1996
Policy proposal for the management of the South African Fishing Industry. 1996
Proposal for controlled seal culling by the directors of new South Africa fishing enterprises (pty) Ltd to be embodied in the new fishing policy. 1996
Timetable for the Finalisation of a management plan. 1997
The subjective nature of risk in fisheries management: examples from lobster fisheries in Australia, New Zealand and South Africa. 2000
Comments on fishing rights, social and environmental responsibilities and the use and abuse of data in the South Africa fishing industry. 2003
The case for user participation in the management of South African fisheries. 2003
Restructuring the South African fishing industry Perception, ideology and reality. 2003
Policy guidelines for the management of the South African fishing industry. 2003
The Marine Living Resources Bill. 2003

Environmental impact studies:

The effect of marine diamond pumping operations on the littoral and shallow sub-littoral benthos along the South African west coast, Namaqualand region. 1990
Marine diamond mining along the southern Namibian coastline Possible impacts on, and conflicts with, the local rock lobster fishery.1996
Statistical analysis of samples of diamond concentrations in a marine mining concession area. 1996

South African West Coast Rock Lobster:

The effect of marine diamond pumping operations on the littoral and shallow sub-littoral benthos along the South African west coast, Namaqualand region. 1990
Final report on the Zone A 30m diving experiment. 1990
A report on the logistically complex field survey involving SCUBA diving from dinghies and four-wheel drive vehicles in diamond mining security areas, Namaqualand. 1990
The impact of publicly operated small craft on the west coast rock lobster resource 1990
The effect of alternative trap design on harvesting strategies for the WCRL 1992
Further clarification of the proposed new management strategy (NMS) as a long term harvesting option for the west coast rock lobster.1992
A random stratified trap survey as an independent monitoring system for the WCRL resource 1st survey in area 8. 1992
Investigation into possible implications of minimum size relief measures in the 1991/92 fishing season for future harvesting options for the WCRL resource. 1992
A new management strategy for optimal utilization of the South African cape rock lobster Jasus lalandii (palinuridae) resource. 1992
A proposal for a male-only harvesting strategy for west coast rock lobster. 1993
Industry viewpoint regarding TAC and minimum size for the 1993/94 fishing season - west coast rock lobster. 1993
The status and productivity of the West Coast rock lobster resource, and bio-economic scenarios under different harvesting policies 94-95. 1994
Global versus area-by-area TAC's for the west coast rock lobster resource: implications for bio-economic risk.
Extensions to the size structured model for west coast rock lobster. Selected results for a regression involving a likelihood function with catch rate, catch-at-size and female catch frequency data and a dynamic analysis from 1870 to 1994. 1995
Results of the 1995 area 8 survey. 1995
Use of a modified Fox model to compare the performance of the West Coast rock lobster resource under either a step-wise TAC reduction scheme or a constant catch level over the next five years. 1995.
Report on the experimental fishing operation on West coast rock lobster in the deep water off Cape Point. 1995
Trends in area catches and catch rates between the years 1993 and 1995 (SFRI database) and TAC recommendations for the 1995-96 fishing season. 1995
A preliminary fit of the revised size structure model for West Coast rock lobster to CPUE, catch size structure and female catch frequency data. 1995.
Comments on the results from size structured assessments of the West Coast rock lobster resource. 1995.
Comments regarding trends in area catches and catch rates between the years 1993 and 1995 (SFRI database). 1995
Scientific deliberations on the 95/96 WCRL TAC. OLRAC's submission in context. 1995
Further submissions regarding west coast rock lobster CPUE trends during the 1992-93 - 1994-95 fishing seasons. 1995
A reassessment of the state of the West Coast rock lobster resource and its implications for a change to the 1995/96 TAC. 1996
A submission to the SFRI working group regarding fishing performance during the first three months of the 1995/96 fishing season and its implications for the 1995/6 TAC. 1996
A scientific view on the 1995/96 TAC by the West Coast rock lobster industry. 1996.
Industry impressions and report on the performance of the West Coast rock lobster fishery, November 1995 to March 1996. 1996
Recent results obtained from a restricted implementation of the size-based stock assessment procedure for the WCRL. 1996
OLRAC presentation to the WCRL Association. 1996
Trends in somatic growth rate of west coast rock lobster: comments for future consideration. 1996
Recent indications about the productivity of the WCRL resource. 1997
Medium term management options for the WCRL resource. 1997
An alternative management program for the west coast rock lobster resource. 1997
Technical issues in the management of the West Coast rock lobster resource, for attention during the revision of the OMP.1999.
Possible biases in CPUE due to changes in fishing strategy.1999
Summary of inputs for the South African WCRL size structured model and sampling strategies to satisfy these data requirements. 1999
Comments on stock assessment principles applicable to the West Coast rock lobster resource. May 1999.
A proposal for an Industry-MCM workshop on the West Coast rock lobster OMP. 1999
Comments on WG/07/99/WCL 20 and Addendum to WG/07/99/WCL 20. 1999
WCRL- methodological description for size structured modeling work. 1999
West coast rock lobster research. 2000
Experimental work on the fishing performance of West Coast rock lobster trap prototypes: A draft proposal by OLRAC. 2000
The design and development of a WCRL trap by Terry Erasmus: OLRAC's comments. 2000
The subjective nature of risk in fisheries management: examples from lobster fisheries in Australia, New Zealand and South Africa. 2000
Further comments on the differences in stock assessment results for the WCRL resource. 2000
Points arising from BEN/NOV00/WCRL/3f in regard to stock assessment analyses producing different results. 2000
The level of concordance between stock assessment results produced using different sets of computer code. 2000
Key uncertainties and possible biases in some of the data use for the WCRL assessment model and the OMP. 2000
Comments on stock assessment methodology and results for the South African WCRL resource. 2000
Report on the BENEFIT workshop on the management of the West Coast rock lobster resource. 2001
Summary of recommendations and suggestions from the Benefit stock assessment workshop and review panel for research into WCRL management. 2001
Progress with cross-checking OLRAC's and the MCM's computer code for stock assessment calculations for the WCRL resource. 2001
Suggestions for the use of resource abundance indices from an Area 8 survey carried out in May/June 2001.
Suggested additional Analysis of revised growth rate data for West coast rock lobster. 2001
Results of the West Coast rock lobster Area 8 survey in 2001
Request for specific recommendations and comments by Benefit 2001 regarding WCRL. 2001
The November 2001 Benefit workshop, and items requiring high priority attention. 2002
Data requirements for spatially disaggregated size structured assessments of the WCRL resource. 2002
The 2002 TAC for WCRL for three options for somatic growth data, using the OMP with CPUE and FIMS data reported in WG/08/02/WCL28. 2002
Further annual somatic growth rate estimation for male west coast rock lobsters based on moult probability model. 2002
A view on outstanding stock assessment issues and associated OMP development work for West Coast rock lobster. 2002
Further modification to growth rate estimates for male west coast rock lobsters. 2003
Spatially aggregated assessments for west coast rock lobster obtained using automatic differentiation model fitting techniques. 2003
West coast rock lobster OMP development and testing options. 2003
Feedback on west coast rock lobster OMP development and testing options. 2003
RC1 and RC2 stock assessment results by OLRAC. 2003
Additional west coast rock lobster assessment results: likelihood profiles of some key recruitment parameters, monotonicity constraints on selectivities imposed. 2003
Performance characteristics of an OMP for the west coast rock lobster resource. 2003

South African South Coast Rock Lobster:

Points to consider for TAC decisions regarding the South Coast rock lobster (Palinurus gilchristi) resource. 1992
Catch-per-unit-effort trends in the South Coast rock lobster (Palinurus gilchristi) fishery until January 1993. 1993
Summary report on the status of the South Coast rock lobster resource for the 1992/93 fishing season. 1993
Interim report on the status of the South Coast rock lobster resource. 1994
Trends in the status of the South Coast rock lobster Palinurus gilchristi resource up to August. 1994
Estimates of biomass and sustainable yield for the South Coast rock lobster resource based on mark recapture and commercial catch data. 1994.
Further calculations on South Coast rock lobster database, as requested at the Rock Lobster Working Group meeting of 4/7/94. 1994
The status of the South Coast rock lobster Palinurus gilchristi resource. 1994
An examination of the stability of year and electronic equipment factor estimates from the South Coast lobster CPUE database, and its implications for the management of the resource. 1994
Further examination of the stability of year and electronic equipment factor estimates from the South Coast lobster CPUE database, and its implications for the management of the resource. 1994
General linear model fits to the South Coast rock lobster CPUE database, and Bayesian posterior means and models of key management variables. 1994
South coast rock lobster the 1994/95 TAC - Calculations to either support or refute the provisional 10% TAC reduction. 1994- A proposal for research (for the November 1994 SFAC meeting). 1994
A new numerical stock assessment procedure for the South Coast rock lobster resource: A proposed size-structured Bayesian assessment methodology for South Coast rock lobster. 1995
The need for revision of the harvest proportion prior used in the Bayesian assessment of the South Coast rock lobster resource. 1995
Report on research into the provisional 10% TAC cut for the South Coast rock lobster resource. 1995
The South Coast rock lobster - Palinurus gilchristi. 1995
Selected output from the modified Bayesian assessment procedure using non-informative priors on q and s. 1995
The 1995/96 TAC: Research options for the South Coast rock lobster resource. 1995
A proposed size-structured Bayesian assessment methodology for South Coast rock lobster. 1995
Further Bayesian assessments for the South Coast rock lobster resource. Management implications of corrections to the catch time series. 1995
Further Bayesian assessments for the South Coast rock lobster resource. 1995
The process leading up to the August 1995/96 TAC recommendation for South Coast rock lobster, including OLRAC's report on the pack category analyses. 1995
Results obtained from the size-structured Bayesian calculation procedure. 1995
A preliminary technical submission as background to the scientific recommendations on the management of the South Coast rock lobster resource for 1996/97. 1996
The 1996/97 TAC for South Coast rock lobster - documents tabled at Rock Lobster Working Group meetings during May 1996. 1996
Further comment on discrepancies between the 'new' and 'old' CPUE databases for South Coast rock lobster. 1996.
Consequences of inter-skipper competition and changing patterns of effort deployment on the interpretation of commercial catch rates. 1996
Consideration of discrepancies in the most recent South Coast rock lobster database prior to the implementation of the GLM analysis. 1996.
Assessment of the South Coast rock lobster resource using two different numerical procedures. 1996.
OLRAC's comments on recent SFRI submissions on the management of the South Coast rock lobster resource. 1996.
Results from the implementation of the size-based Bayesian assessment procedure for South Coast rock lobster. 1996
Methods and data employed for recent size-structured Bayesian assessment results for South Coast rock lobster, and some corrected preliminary results. 1996
Posterior distributions for Present biomass/K and B (1994)/B(MSY) from the Bayesian procedure based on a surplus production model. 1996.
A computer simulation model of changing patterns of effort deployment in the South Coast rock lobster resource. 1996.
An experimental approach to the determination of the impact of an escalation in effort on the commercial catch rate in the South Coast rock lobster resource. 1997
A pilot study to determine the feasibility of an experimental approach to quantifying the decline and recovery rate of catches at fishing sites in the South Coast rock lobster fishery, and competition between traps. 1997
Feedback from managers and skippers in the South Coast rock lobster industry regarding the practicability of the experimental proposals submitted to the RLWG on 27 March 1997. 1997
Revised size-based Bayesian assessment procedure for South Coast rock lobster, and other quantitative and qualitative factors in the management of the resource. 1997
Preliminary results of the South Coast rock lobster effort project. 1997.
Final agreement for a voluntary reduction in fishing effort by members of the South Coast Rock Lobster Association. 1997
A proposal for rationalizing the relationship between OLRAC and the demersal, West and South Coast lobster and pelagic sectors of the South African fishing industry. 1998
Technical information relevant to the 1997/98 TAC for South Coast rock lobster. 1997.
Effort reduction in the South Coast rock lobster fishery: Summary of agreements reached at a workshop held on 10 September 1997. 1997
Effort reduction in the South Coast rock lobster fishery: A proposal by the industry. 1998.
A proposal for a revised experimental design for investigating the impact of a reduction in effort on CPUE in the South Coast rock lobster fishery. 1998
[Fishing season x month group] interactions relevant to different effort reduction experimental designs for South Coast rock lobster. 1998.
An experimental design for evaluating the influence of different levels of effort on CPUE in the South Coast rock lobster fishery. 1998
Further comment on a design for the effort reduction experiment. 1998
Considerations regarding the use of the experimental results for the design choice for the second phase of the effort reduction experiment. 1998
Statistical implications of a late start to the 1998/99 fishing season and the effort reduction experiment. 1998
Data utilization and stock assessment principles applicable to the West and South coast rock lobster resources. 1999
Implications of different modes of continuation of the South Coast rock lobster effort experiment. 1999.
South Coast rock lobster effort experiment: Effect of separating Agulhas Bank from the remaining fishing areas on the treatment response estimate. 1999. "
South Coast rock lobster effort experiment: Area interaction effects. 1999.
South Coast rock lobster effort experiment: Further analysis of area and vessel interaction effects. 1999.
Conversion of pack category data to catch-at-age estimates for the South Coast rock lobster resource. 1999.
South Coast rock lobster reduced effort experiment. 1999
South Coast rock lobster effort experiment: Analysis of experimental results to the end of March 1999. 1999.
Separate CPUE GLM analyses for summer and winter months - comparison with the base case analysis. 1999.
A definition of effort, which can be used to relate the experimental results to the assessment of the South Coast lobster resource. 1999.
Original and revised methodology for converting pack category data to catch-at-age estimates. June 1999.
Age-structured Bayesian assessment results for South Coast rock lobster assessments allowing for systematic shifts in commercial selectivity patterns. 1999
Further Bayesian assessment results involving different selectivity functions. 1999
Approaches to the management of lobster resources in Australia and New Zealand- feedback from a visit by OLRAC in September and October 1999. 1999
South Coast rock lobster research in December 1999
Comparison of results obtained by OLRAC with results presented in WG/03/00/SCL14. 2000
Comparison of computer code for South Coast stock assessments, and the treatment of the recruitment estimate for the year 1974. 2000
Catch-at-age data derived from commercial pack category data for fishing seasons 1990/91 - 1998/99. 2000
The influence of effort saturation priors on stock assessment analyses for the South Coast rock lobster resource. 2000
The subjective nature of risk in fisheries management: examples from lobster fisheries in Australia, New Zealand and South Africa. 2000
South Coast Rock Lobster Fishery - Effort Reduction Proposals. 2000
Calculation of the allocation of sea-days in the South Coast rock lobster fishery for the 2000/2001 fishing season. 2000
South Coast rock lobster research during the last quarter of 2000. 2001
Scientific considerations and research items for South Coast rock lobster management. 2002
Scenarios for the scientific management of the South Coast rock lobster resource making allowance for historic over-catching. 2002
Revised scenarios for the scientific management of the South Coast rock lobster resource. 2002
Stock assessment results for the South Coast rock lobster resource. 2002
Management proposals for the South Coast rock lobster resource for the 2002/2003 fishing season. 2002
A report to the South Coast Rock Lobster Industry Association on scientific deliberations during 2002 and future technical issues. 2002
Management proposals for the South Coast rock lobster resource for the 2002/2003 fishing season. 2002
Basis for the South Coast Rock Lobster 2002 TAC, and resource size and productivity estimates. 2002
Effort saturation in the South Coast rock lobster fishery: review of data and arguments. 2003
OLRAC's work to date and issues for discussion - SCRL meeting. 2003
Questions for skippers in the South Coast rock lobster industry. 2003
The South Coast Rock Lobster Data filtering and preparation steam using the Clementine data Mining tool. 2003
Stock assessment results for the South Coast rock lobster resource - 2003/2004 TAC. 2003
Further stock assessment results for the South Coast rock lobster resource using different weights for the catch-at-age data. 2003
Preliminary Bayesian stock assessment results for the South Coast rock lobster resource. 2004
Preliminary scenarios for the South Coast rock lobster resource based on assumed 2002/2003 CPUE and catch-at-age data. 2004

South African Hake:

An examination of the implications of long-lining for the future management of the South African hake resource. 1992.
Policy proposals for the South African trawling industry. 1994
Future trends in the South African hake resource. 1994.
Historical background to the hake trawling industry. 1994
A preliminary study into the hake catch-rate database and the TAC implications of making allowance for depth and month effects. 1995.
Harvesting proposals for the South African Hake resource -Assessment of the relative risk of a 10,000 ton increase in the TAC for 1995/96.
Independent scientific recommendations on the 1996 TAC for the Namibian hake resource. 1995
Implications of the inconsistency of commercial catch rate trends with other indices of hake abundance in South African waters. 1996.
Hake abundance trends from catch rate and size structure data. 1996.
The status of independent work on hake resource management. 1996
Outstanding issues in the determination of trends in hake abundance. 1997
The present status of resource management and scientific deliberations concerning South African hake. 1997
The derivation of resource abundance indices from commercial catch rate data for South African hake, and their use for stock assessment purposes. 1997
A suggested approach for deriving a resource abundance index from the commercial catch rate database for South African hake. 1997
The use of liner and 75mm cod end mesh in the hake fishery since 1975.1997
A theoretical approach to the likely impact of changes in the by-catch CPUE on the relationship between hake CPUE and hake biomass. 1998
Progress report on issues related to the ongoing South African Hake scientific deliberation. 1998
Industry position regarding the finalisation of the first assessment phase. 1998
Background to planning the ongoing South African hake scientific deliberations. 1998
Further studies into the GLM and the stock assessment models prior to the proposal of OMP models. 1998
Comments regarding the GLM and stock assessment procedures prior to the proposal of OMP models. 1998
OMP concepts, recent SFRI OMP proposals and OLRAC's recommendations. 1998
Comments on the development of an Operational Management Procedure for the South African hake resource. 1998
Comments on the comparative performance of age structured surplus production model OMPs and surplus production model OMPs for South African hake. 1998
Conceptual discussion regarding the OMP. 1998
Decision list for the hake database submitted for the GLM analysis. 1998
A preliminary evaluation of the implications of the "Brown's Bank issue" for the scientific management of the South African hake resource. 1998
Aspects about quantitative analyses for the South African hake resource, which are uncertain and warrant closer investigation in the short term. 1998
Industry questions regarding the Operational Management Procedures OMP. 1998
Comments on the International Workshop on OMPs in the South African deep-sea trawl and pelagic industries. 1998
Participation by the South African trawling industry in the scientific management of the South African hake resource. 1999
South African hake resource management: Key scientific points and the possible impact of changes in fishing strategy on CPUE. 1999
Current status of scientific deliberations on the management of the South African hake resource. 1999
Research proposals for the South African hake resource. 1999
A proposal for research into the implications of changes in hake fishing strategy since 1978 for the relationship between commercial CPUE and resource abundance. 1999
The sensitivity of yield estimates obtained from multi-fleet, age structured assessments of the South Coast hake resource. 1999
Yield per recruit analyses for the South Coast hake resource: trawling compared to longlining. 1999
The Present Status of Hake Resource Management. 1999
Interim report on study entitled "The implications of changes in hake fishing strategy since 1978 for the relationship between commercial CPUE and resource abundance". 2001
Fishing strategy impacts on standardised commercial catch rate trends for South African hake, including associated field work proposals. 2001
Summary of fishing strategy impacts on standardised commercial catch rate trends for South African hake, including associated field work proposals. 2001
The basis for the hake TAC for 2002. 2001
Points for discussion on the management of the South African hake resource. 2001
Some scenarios regarding the scientific management of the hake resource. 2002
Comments about fisheries management in South Africa and a proposal for ongoing analysis by OLRAC in the scientific management of the hake resource. 2002
Report on a Demersal Working Group meeting: 13h30, 25 October 2002. 2002
Report on a Demersal Working Group meeting: 14h00-16h30, 25 October 2002. 2002
A review of publications and reports which form the basis for the present scientific view of hake longlining. 2003
Points regarding hake research and OLRAC's involvement. 2003
Questionnaire into changes in fishing strategies and gear in the South African trawl fishery since 1983. 2003
Stock assessment implications of combining the South and West Coast Merluccius paradoxus resource units. 2003
Standardised CPUE time series for hake species M.paradoxus and M.capensis on the west and south coasts. 2003

South African Abalone:

An application for a permit to develop an abalone (Haliotis midae) fishery in the Eastern Cape Province. 1994
Comments following an appraisal of submissions to the Abalone Working Group for scientific recommendations on the TAC for the 2000/2001 season. 2000
A proposal to conduct a survey of abalone densities in management zones A, B, C and D. 2001
Abalone survey proposals by OLRAC cc. 2001.
Poaching and post-1993 recruitment level scaling parameter estimates for Zone C of the abalone resource. 2001
Relevant results from age-structured production models applied to data from Zones A-D. 2001
Data issues requiring clarification before mathematical work can proceed. 2001
Letter Dr R Anderson Abalone Working Group Chairman describing OLRAC cc survey of all Zones and depths. 2001
Preliminary results from the industry abalone survey with focus on juvenile abalone. 2001
Sustainable yield characteristics of abalone stocks based on a spatially aggregated population model for an illustrative zone with a 5000 ton pristine spawning biomass. 2001
Abalone survey results obtained with revised statistical assumptions. 2001
Zone A and B projections with an upper bound on the pristine spawning biomass and the proportion of juvenile settlement that occurs inshore. 2001
Industry abalone survey results obtained with revised statistical assumptions. 2001
Zone A and B projections obtained by refitting all parameters but with constraints on the maximum pristine spawning biomass (Zone A only) and the proportion of juvenile settlement that occurs inshore (Zone A and B).
Guidelines for TAC recommendations. 2001
Further Zone B projections based on fits with reduced historic poaching levels. 2001
Zone A further projections. 2001
Further Zone B projections based on fits with reduced historic poaching levels. 2001
Further Zone C results. 2001
Zone D projections obtained by refitting all parameters but with a fixed (inputted) proportion of inshore juvenile settlement of 0.75. 2001
Abalone Management Options. Document prepared by OLRAC in support of the industry's new management proposal for the resource. 2001
Resource projections for Zone C under different harvesting strategies and for different future recruitment scenarios. 2001
Resource projections for Zones A-D under different harvesting strategies and for different future recruitment scenarios. 2001
Diving procedure for abalone survey April 2001. 2001
Abalone survey Hangklip to Cape Agulhas. Report on survey operations and logistics. 2001
Revised GPS locations for the abalone survey. 2001
Summary of industry input into scientific co-management with M&CM during the 2000/2001 fishing season: abalone resource. 2001
Final report on the 2001 industry abalone survey. 2001
Abalone survey proposals and suggestions. 2001
Survey design considerations for a proposed full population structure survey to be conducted jointly between industry and the M&CM. 2001
Comments about the TAC for abalone. 2001
Selected points arising from the meeting of the Abalone Working Group, 13 March 2002. 2002
Abalone full population survey in Zones B and C: Points regarding logistics and responsibilities based on discussions between Mark Noffke and Mike Bergh on 18 March 2002. 2002
Abalone full population survey in zones B and C: Points regarding logistics and responsibilities. 2002
Some results from the joint industry-M&CM survey of abalone in Zones B and C. 2002
Alternative abalone poaching trend assumptions for 2002. 2002
Preliminary scenarios for Zones C and D. 2002
Stock assessment model fits for Zones A-D, for two different patterns of poaching, and for different upper bounds on the confiscation: poaching ratio. 2002
Stock assessment results for Zone A at the 25% poaching constraint, using two different pristine spawning biomass values. 2002
Cumulative abalone count data from a survey conducted jointly between industry and the M&CM during 2002. 2002
Outstanding reference case comparison issues for abalone stock assessments. 2002
Abalone stock assessment scenarios for 2002 deliberations. 2002
Abalone stock assessment scenarios for 2002 deliberations including joint Zone B and C assessments. 2002
Strategic points regarding abalone management. 2002
Abalone resource biomass projections for three different poaching patterns, 25% and 50% poaching constraints, two options for future recruitment in Zones C and D, and six combinations of future commercial + recreational and poached catches. 2002
Abalone resource assessment results for three different poaching patterns, 25% and 50% poaching constraints, and two options for post 1993 recruitment in Zones C and D. 2002
Spawning biomass projections for the abalone resource under an agreed set of commercial, recreational and poaching scenarios. 2002
Points in response to a proposal to close the abalone fishery in South Africa submitted by Mr. Horst Kleinschmidt, MCM, DEAT. 2003
Points regarding the proposal to close Dyer Island to further commercial harvesting. 2003
Background information on abalone. 2003
Abalone management recommendations: underlying assumptions and implied resource biomass and productivity. 2003
Abalone stock assessment results relevant to the component of the TAC to be taken from Zones A, B, C and D. 2003
Further abalone stock assessment results for Zones A, B, C and D. 2003
Stock assessments results for Zone A at the 25% poaching constraint, using two different pristine spawning biomass values. 2003
Presentation of results for abalone stock assessments for Zones A, B, C and D, consistent with options discussed and requested by the working group. 2003"
Presentation of additional results for abalone stock assessments for Zones A, B, C and D, following a review of the Zone B and C joint assessment procedure. 2003

South African Pelagic species:

Points for discussion for the Pelagic INSEF meeting with regard to the problems of pilchard by-catch. 1994
Questions on the management of pelagic stocks posed to a workshop on international practice relating to Operational Management Procedures (OMPs). 1998
Proposals for studies on the size and productivity of the South African mackerel stock (Trachurus trachurus). 2000
A study into the management of the South African horse mackerel resource. 2001
Short summary and conclusions of OLRAC's report regarding the status of the South African Horse Mackerel resource. 2001
A brief review of the process of calculating individual quotas for the year 2002 for the directed pilchard and anchovy fisheries. 2002
Proposals for further studies on the size and productivity of the South African mackerel stock (Trachurus trachurus). 2002
A study into the productivity of the South African horse mackerel resource. 2003

South African monkfish:

A proposal for the development of a monkfish (Lophius spp) directed trawl fishery in South African waters. 1999
Feasible sustainable yields for monkfish (Lophius spp) in South African waters. 2002

Studies for the Natal Sharks Board, Kwazulu-Natal, South Africa:

The feasibility of predicting the risk of reducing or altering shark net configurations on the Natal coast: a preliminary numerical study, 1995.
Shark netting along the Kwazulu Natal coast. 1996
Estimates of the capturing efficiency of drumlines versus nets for Great White, Tiger and Zambezi sharks. 1996.
Further work on the relationship between shark attack risk and netting strategies: The interrelationship between shark catch, netting effort and time; sample size estimates for net removal experiments; implications of shark mark-recapture results; new results obtained using the shark convection model. 1996.
Addendum to OLRAC's report entitled 'Further work on the relationship between shark attack risk and netting strategies": Estimates of shark net mortality from the Natal Shark's Boards mark-recapture results, and results obtained from an application of the convection model to four Kwazulu-Natal netted beaches.
Important features of data on the capture of Great White, Tiger and Zambezi sharks in shark nets off Kwazulu-Natal. 1996

Namibian Hake:

Estimates of biomass and yield of the Namibian hake resource based on commercial catch rate and scientific survey data: Implications for the 1996 TAC. 1995
A Stock assessment for the Namibian Hake resource based on commercial catch rate and scientific survey data: Implications for the 1996 TAC. 1995
Further scientific insight into the biomass and yield potential of the Namibian hake resource: Implications for an in-season TAC revision in March 1996. 1996
Further numerical analyses to establish a TAC for the Namibian hake resource for 1996. 1996
The dynamics of the Namibian hake resource since independence: A submission to the Namibian SFAC for deliberations on the 1997 TAC. 1997
An analysis of the Spanish ground fish survey data from 1983 to 1990 and the Dr Fridjtof Nansen research cruise data from 1990 to 1997. 1997
Management considerations for the Namibian hake resource, including revised survey data analyses and age structured production model results. 1997
The October 1997 hake workshop: Industry comments. 1997
Workshop on research and management of hake in Namibian Waters. 1997
A proposal for the determination of the 1998 TAC for the Namibian hake resource, and the modification of this value in subsequent years based on resource performance indices. 1998
Options for the selection of an acceptable IMP model: Submission for industry discussion. 2000

Namibian Pilchard:

A numerical investigation of consistencies in and the management implications of hydro-acoustic estimates of the size of the Namibian pilchard resource over the past four years. 1995
A numerical investigation of hydro-acoustic assessments of the Namibian pilchard resource between 1991 and 1995. 1995.
Report from industry scientists participating in the November 1995 hydro-acoustic pelagic survey. 1995.
Comments on the design and efficacy of the Namibian hydro-acoustic surveys for pilchard, and implications for management
Report from industry scientists participating in the March 1996 hydro-acoustic pelagic survey. 1996

Namibian Rock Lobster:

Marine diamond mining along the southern Namibian coastline: Possible impacts on, and conflicts with, the local rock lobster fishery. 1996
Recommendations on the research programme for the Namibian rock lobster resource. 1996

The development of deep sea fisheries: Namibian orange roughy

OLRAC was instrumental in the development of the Namibian orange roughy fishery, by virtue of the following: The formation of a consortium of expertise for carrying out exploratory fishing, the attraction of venture capital, the development of specialised data logging software. However, at the present time OLRAC has no commercial interest in this fishery.