Search results
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A method for estimating recruitment and mortality from time series of length-density data
estimates are needed for estimating recruitments and for use in assessing yield. This paper proposes a ... method for jointly estimating natural mortality and cohort strength at age 4 using a negative log ... years. A worked example is provided in an appendix. Author(s): A. Constable and I. Ball (Australia ... ) Title: A method for estimating recruitment and mortality from time series of length-density data ...
Meeting Document : WG-FSA-00/52 : Author(s): A. Constable and I. Ball (Australia)
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Peches exploratoires dans la sous-zone 58.6, resultats des campagnes 1983 a 1995
only one Nototheniid fish Dissostichus eleginoides. The other species have no future for a commercial ... and even along one fishing experiment despite a limited fishing effort. Two hypothesis are proposed to ... explain the trends: a quick col1apse or/and a high migratory pattern of this part of the stock. The ... running experiments do not allow to consider and work out a plan an high fishing effort (or in the future ...
Meeting Document : WG-FSA-95/10 : Author(s): Duhamel, G.
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on recent survey results
vicinity of Heard Island during April-May 2011. This paper provides a preliminary assessment of mackerel ... ’ E using standard CCAMLR methods. A pattern of 5 year classes being present simultaneously in the ... population, which was first detected in 2011, has persisted, however a large cohort of fish, estimated to be ... 2+, dominate the population in both abundance and biomass. A new length weight model is estimated ...
Meeting Document : WG-FSA-12/26 : Author(s): D.C. Welsford (Australia)
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A review of conversion factors used in CCAMLR toothfish fisheries
be required to better understand the sources of this variability. The results suggest that a ... reconciliation between the reported catch for a vessel and the weight of product reported in a catch document ... submitted to the CDS should be based on a conversion of the ‘green weight’ for each haul in the C2 data to a ... ): CCAMLR Secretariat Title: A review of conversion factors used in CCAMLR toothfish fisheries Approval ...
Meeting Document : WG-FSA-15/02 : Author(s): CCAMLR Secretariat
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Proposal for a krill biomass survey for krill monitoring and management in CCAMLR Division 58.4.2-East
Abstract: Australia plans to conduct a krill biomass survey in Division 58.4.2 East during 23 ... January to 25 March 2021. The survey will estimate krill biomass with a view to update the precautionary ... catch limit for krill. A krill observatory mooring system will also be deployed during the survey to ... and predators. A deeper understanding of all these factors will support the design of a tractable and ...
Meeting Document : WG-EMM-2019/03 : Author(s): S. Kawaguchi, M. Cox, N. Kelly, L. Emmerson and D. Welsford
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A proposal for streamlining the work of the Scientific Committee for the Conservation of Antarctic Marine Living Resources
Abstract: The work of the Scientific Committee is expanding with a duplication of some functions ... in different working groups. There is also a need to give time to emerging issues for which there is ... a CCAMLR context. It is proposed that the working groups of the Scientific Committee be revised to ... develop methods for (a) assessing fish, krill and bycatch populations, (b) status of predator and other ...
Meeting Document : WG-EMM-05/35 : Author(s): A.J. Constable (Australia)
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A feedback approach to Ecosystem Based Management: model predictive control of the Antarctic krill fishery
to develop a feedback approach to aid Ecosystem Based Management (EBM) of the Antarctic krill fishery ... rules based on their predicted performance in a model of the controlled system. Here we use MPC to ... develop a robust control strategy for a simulation model of a spatially resolved predator-prey system. We ... is a promising approach for addressing spatially-resolved multiple-objective problems with high ...
Meeting Document : WG-EMM-12/19 : Author(s): S. Hill and M. Cannon (United Kingdom)
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Proposal for the creation of a Domain 1 MPA Expert Group
Abstract: Domain 1 is a complex region where multiple interests and activities coexist, including ... included the increase of the catch level of krill (CM 51-07), the development of a risk assessment and the ... feedback management strategy, and lately the designation of a Marine Protected Area. In addition ... changes, a new approach involving the views of multinational experts is required, in order to identify the ...
Meeting Document : SC-CAMLR-XXXVI/19 : Author(s): Delegations of Argentina and Chile
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Models of tag shedding for double tagging as a function of time at liberty and approximate solutions for the single tagging model in CASAL
) which models the annual tag shedding (i.e. loss) rate as a constant for individual tags. The CASAL ... software applies this model correctly for fish released with a single tag but does not have the facility at ... , as a function of time at liberty. This over-estimation is shown to be significant and the ... a large sample of recaptures of fish released in the Heard and MacDonald Island (HIMI) (Division ...
Meeting Document : WG-SAM-11/12 : Author(s): S.G. Candy (Australia)
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Evaluation of de la Mare’s composite standardised index for generating a simple time-series summary of many long-term datasets on Antarctic predators: consequences of missing values and criteria for inclusion of predator parameters
Abstract: In 1997, de la Mare presented a statistic (labelled the Composite Standardised Index at ... the Workshop on Area 48) to WG-EMM for generating a simple time-series index of many long-term ... datasets on Antarctic predators. The value of the index in a given year is dependent on the specific ... correlated the parameters are to each other. This paper reports on a Monte Carlo simulation study that helps ...
Meeting Document : WG-EMM-98/45 : Author(s): A. Constable (Australia)