Search results
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Theoretical considerations for estimating the density of cohorts and mean recruitment of Patagonian toothfish (Dissostichus eleginoides) based on research trawl survey data
meeting. This paper elaborates the issues surrounding how age information should be incorporated into CMIX ... analyses; which age groups should be included in the estimation of recruitment, and the need for a clear ... examples for the survey series for Subarea 48.3. A checklist of issues to be considered when undertaking ...
Meeting Document : WG-FSA-04/92 : Author(s): C.R. Davies, E.M. van Wijk and A.J. Constable (Australia)
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YEAR OF THE SKATE SAMPLING PROTOCOL: LEARNING FROM THE 2007–08 SEASON SAMPLING PROTOCOL ON NZ VESSELS
required before a full assessment can be carried out. In 2007, WG-SAM recommended (CCAMLR XXVI WG-SAM ... effort on bycatch will be concentrated on skate species in that year in order to inform a full skate ... assessment. This paper discusses improvements to the fishery derived data that may be required to better ...
Meeting Document : WG-FSA-08/49 : Author(s): S. Mormede (New Zealand)
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DEFINING TAG RATES AND TACS TO OBTAIN SUITABLY PRECISE ABUNDANCE ESTIMATES FOR NEW AND EXPLORATORY FISHERIES IN THE CCAMLR CONVENTION AREA
catches (TACs) that would be expected to yield a pre-specified precision in a resultant abundance estimate ... of releases and recaptures, which can in turn be expressed in terms of the tagging rate per tonne ... be extremely useful in terms of defining suitable catch levels and tagging rates required to obtain a ...
Meeting Document : WG-SAM-08/06 : Author(s): R.M. Hillary (UK)
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Stability of trip selections for the assessment of Antarctic toothfish in the Ross Sea
were used to define a range for various data quality metrics considered to be informative with respect ... period indicate that additional, historical trips may be added to the data set as new tagging data become ... in future years as further data are added will also be of interest. Author(s): D.A.J. Middleton (New ...
Meeting Document : WG-FSA-10/26 : Author(s): D.A.J. Middleton (New Zealand)
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Results of trials undertaken around Crozet Island using pots to target Patagonian toothfish
fishing techniques and further investigations are needed to be in position to asses the economic viability ... still needs to be solved. Furthermore the operational, safety and social issues should also be taken ...
Meeting Document : WG-FSA-10/10 : Author(s): N. Gasco, P. Tixier and C. Guinet (France)
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Research plan for toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in 2010/11
Maru No. 3 to be conducted in April-June 2011. This is the second year of the survey of the 3-5 years ... area in the same manner as 2009/10 survey. A Trot line system will be employed for all hauls. To apply ... the mark-and-recapture studies, sufficient tagging rate of 5 fish / ton will be conducted in the same ...
Meeting Document : WG-SAM-10/15 : Author(s): Delegation of Japan
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Modelling growth and reproduction of Antarctic krill: implications of spatial and temporal trends in temperature and food for ecosystem-based management of krill fisheries
consistent with the general expectations for krill growth models as well as having the flexibility to be ... precautionary yield for krill in CCAMLR, we recommend that this new model be incorporated into those assessments ... . The current uncertainty in many of the parameter values could be included in the Monte Carlo ...
Meeting Document : WG-EMM-12/38 : Author(s): A.J. Constable and S. Kawaguchi (Australia)
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COMPARING CEMP INDICES TO INFORM FEEDBACK MANAGEMENT OF THE ANTARCTIC KRILL FISHERY
be made efficiently via the comparative approach. Specifically, changes due to an impact in one ... population can be assessed by measuring trends in the difference between the observed states of a “treatment ... illustrate sensitivity to the choice of data and impact, and to suggest that useful comparisons can be made ...
Meeting Document : WG-EMM-11/25 : Author(s): J.T. Hinke and G.M. Watters (USA)
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Sources of variance in studies of krill population genetics
primarily by restricted gene flow between widely separated sampling sites may be incorrect. Our recent study ... of krill population genetics, which must be able to accommodate this variance component as well as ... different regions can therefore not be adequately assessed unless multiple samples are taken from each ...
Meeting Document : WG-EMM-01/12 : Author(s): S.N. Jarman and S. Nicol (Australia)
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DEVELOPMENT OF A METHODOLOGY FOR DATA QUALITY ASSESSMENT
assist in assessing which data from a trip should be used in an assessment, and can also guide how these ... data can best be used.The quality of tag data is hard to assess. A methodology is developed to use data ... fishery. Cluster analyses suggests two groups of trips, one of which can tentatively be considered to have ...
Meeting Document : WG-SAM-08/13 : Author(s): D.A.J. Middleton and A. Dunn (New Zealand)