WG-SAM-10/01 More Info |
Draft Agenda and Draft Annotated Agenda for the 2010 Meeting
of the Working Group on Statistics, Assessments and Modelling (WG-SAM) |
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WG-SAM-10/02 More Info |
List of Participants |
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WG-SAM-10/03 More Info |
List of Documents |
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WG-SAM-10/04 More Info |
Deployment of research hauls in the exploratory fisheries for Dissostichus spp. in Subareas 48.6 and 58.4 in 2009/10 Secretariat
Abstract:
ABSTRACT
Prior to the 2009/10 fishing season, the Secretariat allocated starting positions for research hauls in the exploratory fisheries in Subareas 48.6 and 58.4 (except on BANZARE Bank were positions were specified in Conservation Measure 41-07). For each of the 12 notifying vessels, up to 8 starting positions were provided for each stratum in each SSRU notified, and vessels were Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/05 More Info |
Further improvements in data quality (short note) Secretariat
Abstract:
ABSTRACT
Two new procedures are currently been developed by the Secretariat to further improve data quality: (1) validation of species’ spatial distributions; and (2) visualisation of data from single fishing trips. Both procedures are outlined.
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/06 More Info |
Recommendations on estimating krill escape mortality during fishing operations: the problems and approaches V.K. Korotkov and S.M. Kasatkina (Russia)
Abstract:
The task to estimate the escape mortality of krill during the fishing operation assigned by Scientific Committee requires assessment of the total krill passed through the rope and netting parts of trawl and krill amount appeared unviable in the process of escapement. The recommendations presented are the first attempt to develop the method of instrumental assessment of the «escape mortality». Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/07 Rev. 1 More Info |
Assessment of fishable krill biomass on the basis of the acoustic surveys results using geostatistical methods S.M. Kasatkina and P.S. Gasyukov (Russia)
Abstract:
ABSTRACT Applicability of geostatistical methods in processing the acoustic fields of krill density based on the acoustic survey data is demonstrated. The results obtained indicate usefulness of these methods in studying the structure of krill density field for biomass assessment in compliance with different thresholds of their fishery importance. The structure of krill density field in Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/08 More Info |
Proposal to commission an independent review of the Secretariat’s data management systems Secretariat
Abstract:
1. The Secretariat manages a comprehensive, detailed set of independent or related databases which support the work of the Commission and give effect to Article XX of the CAMLR Convention. Since the establishment of CCAMLR 28 years ago, there has been no formal, in-depth audit of the Secretariat’s data management systems against international best practice. 2. The Working Group is invited to Read More
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WG-SAM-10/09 More Info |
Update on Patch v2: a simulation program in R for evaluating spatial management strategies to conserve structure and function of ecosystems A.J. Constable (Australia)
Abstract:
Version 2 of Patch is available. Patch is a simulation program in R for evaluating spatial management strategies to conserve structure and function of ecosystems. Patch has been defined specifically for evaluating strategies to manage bottom fisheries to avoid significant adverse impacts on vulnerable marine ecosystems. This paper includes the revised manual for Patch, which describes its Read More
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WG-SAM-10/11 Rev. 1 More Info |
Estimation of natural mortality using catch-at-age and aged mark-recapture data: a simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation S.G. Candy (Australia)
Abstract:
Attempts to estimate natural mortality, as a single constant M, simultaneously with other model parameters in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI, CCAMLR Division 58.5.2) Patagonian toothfish (Dissostichus eleginoides) fishery have been unsuccessful. An alternative estimation strategy was tested using simulation whereby catch-at-age and aged mark- Read More
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WG-SAM-10/12 More Info |
Comparison of age- and length-based harvest control rules for the South Georgia icefish (Champsocephalus gunnari) fishery C.T.T. Edwards, R.M. Hillary, R.E. Mitchell and D.J. Agnew (United Kingdom)
Abstract:
An age-based operating model was constructed and used to derive an initial numbers at age vector for the population. An age-based harvest control rule was then applied using the operating model dynamics and assuming perfect knowledge of the resource (initial numbers at age, maturity and weight at age). The initial numbers at age was also converted to numbers at length, which was used to Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/13 More Info |
Preliminary reports on stock status and biological information on toothfish obtained from the scientific research survey by Shinsei Maru No. 3 in 2009/10 in the SE sector of Division 58.4.3b K. Taki, M. Kiyota and T. Ichii (Japan)
Abstract:
In accordance with the Conservation Measure 41-07 (2009), a survey was conducted in order to collect information for the stock status and biological information on toothfish in the southeast sector (24 allocated points) of Division 58.4.3b (Banzare Bank), using a commercial bottom longline vessel Shinsei Maru No. 3, from December 1 to 13, 2009. Shinsei Maru Trot line system Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/14 More Info |
Preliminary reports on abundance and biological information on toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in the 2009/10 season K. Taki, M. Kiyota and T. Ichii (Japan)
Abstract:
A survey was conducted in order to collect information for the stock status and various biological information on toothfish in Division 58.4.4a & b (Ob Lena Bank) by using a commercial bottom longline vessel, Shinsei Maru No. 3, from April 30 to June 20. The survey was undertaken according to the decision in the 28th CCAMLR Meeting of the Commission (28th CCAMLR report paragraph 4 Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/15 More Info |
Research plan for toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in 2010/11 Delegation of Japan
Abstract:
In order to clarify the stock status and biological characteristics of Dissostichus spp. In Division 58.4.4 a & b, we submit this research plan for toothfish in the Division by Shinsei Maru No. 3 to be conducted in April-June 2011. This is the second year of the survey of the 3-5 years consecutive research focusing on tagging program, recommended by WG-SAM-09 in this Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/16 More Info |
Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean, Antarctic K. Taki, M. Kiyota, T. Ichii and T. Iwami (Japan)
Abstract:
Distribution, relationship between sizes and depths, sex ratio, size composition and maturity condition for Dissostichus eleginoides and D. mawsoni were investigated on Banzare Bank, using the biological data sampled by a Japanese commercial fishing vessel during austral summer from 2006/07 to 2008/09 fishing season. D. eleginoides was mainly caught in the shallower Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/17 More Info |
Analysis of observer coverage for Japanese krill fishing vessels T. Okuda, M. Kiyota and H. Okamura (Japan)
Abstract:
Sources of variability of krill mean length and fish bycatch number was investigated to explore proper allocation of scientific observers on Japanese krill fishing vessels using the data from 1995 to 2008. Based on the multistage sampling theory, we derived the equation of variance in four stage cluster sampling units (i.e., vessel, year, subarea, and haul), and examined changes in the Read More
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Admin Admin (CCAMLR Secretariat)
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WG-SAM-10/18 More Info |
A bathymetric data framework for conservation in the Ross Sea region S.J. Parker, B. Wood, S.M. Hanchet and A. Dunn (New Zealand)
Abstract:
Bathymetric data are currently used inter alia to define management boundaries, implement conservation measures, allocate catch among areas, estimate spatial impacts due to fishing, and inform ecosystem-based management through bioregionalisation. Several data sources for bathymetric data exist, and these sources improve with time through additional data collection and improved analytical Read More
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WG-SAM-10/19 More Info |
Development of methods for evaluating the management of benthic impacts from longline fishing using spatially explicit production models A. Dunn, S.J. Parker and S. Mormede (New Zealand)
Abstract:
An important management objective for CCAMLR in the high seas region of the Antarctic is to develop appropriate methods of monitoring and managing impacts of bottom fisheries on vulnerable marine ecosystems (VMEs). We describe a spatially explicit production model that can be used to investigate a range of simple scenarios for simulating the effect and management of benthic impacts from Read More
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WG-SAM-10/20 More Info |
Revised impact assessment framework to estimate the cumulative footprint and impact on VME taxa of New Zealand bottom longline fisheries in the Ross Sea region B.R. Sharp (New Zealand)
Abstract:
In 2008-2009 New Zealand developed an impact assessment framework to estimate the likely impacts of bottom longline fishing on vulnerable benthic invertebrate taxa, termed Vulnerable Marine Ecosystems (VMEs), consistent with the requirements of Conservation Measure 22-06 (Bottom fishing in the Convention area). The impact assessment framework was subsequently endorsed within CCAMLR for routine Read More
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WG-SAM-10/21 More Info |
Towards a Minimum Realistic Model for investigating trophic relationships between Antarctic toothfish and demersal fish in the Ross Sea, Antarctica M.H. Pinkerton, S. Mormede and S.M. Hanchet (New Zealand)
Abstract:
We report on progress towards developing a Minimum Realistic Model for investigating trophic relationships between Antarctic toothfish (Dissostichus mawsoni) and four groups of demersal fish in the Ross Sea, Antarctica. These demersal fish are known to form a part (in some cases a substantial part) of the diet of Antarctic toothfish of a size commonly taken by the Ross Sea fishery and Read More
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WG-SAM-10/22 More Info |
plotImage – software for producing augmented image plots of spatially referenced data J.P. McKinlay (Australia)
Abstract:
Software is presented for the automated production of standardised image plots of spatially referenced data. While developed to satisfy the specific requirements of WG-FSA, the routines have been developed to be as generic as possible and may be useful for displaying a wide range of data. This software is submitted to be appraised by WG-SAM in the hope it may prove a useful tool within CCAMLR Read More
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WG-SAM-10/P01 More Info |
Fisheries risks to the population viability of black petrel (Procellaria parkinsoni) R.I.C.C. Francis and E.A. Bell (New Zealand)
Abstract:
Data on the main population of black petrel (Procellaria parkinsoni), which breeds on Great Barrier Island, were analysed. Three types of data were available. The most useful was abundance data, from which it was possible to infer that the population was probably increasing at a rate between 1.2% and 3.1% per year. Mark-recapture data were useful in estimating demographic parameters, Read More
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Publication:
(New Zealand Aquatic Environment and Biodiversity Report, 51 (2010), ISSN 1176-9440)
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