Search results
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IDENTIFICATION OF DATA QUALITY METRICS FOR TAGGING DATA SELECTION
Abstract: The suite of data quality metrics introduced by Middleton & Dunn (2008) is examined ... to identify those metrics that are most informative with respect to the identification of good tagging data ... . Trips considered to have “known” good tagging data are identified, based on above-median rates ... analysis indicates that the range of data quality metrics associated with known good tagging data ...
Meeting Document : WG-SAM-09/19 : Author(s): D.A.J. Middleton and A. Dunn (New Zealand)
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Krill CPUE standardisation and comparison with acoustic data based on data collected from Chinese fishing vessels in Subarea 48.1
Abstract: The usability of CPUE data as Antarctic krill abundance index was a widely discussed ... issue. Many studies suggested the CPUE data should be standardized before using as abundance/biomass ... index. We tried to develop general additive models to standardize the CPUE data collected from Chinese ... fishing vessels during 2009/10-2013/14 seasons. We also compared the CPUE data and acoustic data collected ...
Meeting Document : WG-EMM-17/41 : Author(s): Y. Ying, X. Wang, J. Zhu and X. Zhao
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The reliability of VHF telemetry data for measuring attendance patterns of marine predators: a comparison with Time Depth Recorder data
Abstract: VHF radiotelemetry data has been used for over thirty years to monitor the behavior ... patterns of otariid seals. These data have been used in a wide variety of ways, from characterizing ... in attendance patterns. Yet the accuracy of VHF data has never been appropriately evaluated. Our study compares ... VHF data collected on 16 lactating Antarctic fur seals to assess onshore attendance, with concurrently ...
Meeting Document : WG-EMM-15/P05 : Author(s): A.D. Lowther, H. Ahonen, G. Hofmeyr, W.C. Oosthuizen, P.J. Nico De Bruyn, C. Lydersen and K. Kovacs
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Potential for using CCAMLR VMS data for compliance analysis and data quality assurance
a process to utilise VMS data for data-quality assurance in relation to catch data. This represents a change ... in focus on the use of VMS data by CCAMLR and requires a contingent change in emphasis on data quality ... for compliance analysis and improving the quality of other georeferenced data. Author(s): CCAMLR Secretariat ... Title: Potential for using CCAMLR VMS data for compliance analysis and data quality assurance Approval ...
Meeting Document : SC-CAMLR-XXXIV/BG/19 : Author(s): CCAMLR Secretariat
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An update on using the CCAMLRGIS R package to create polygon data and access data on the CCAMLR online GIS
Abstract: To facilitate access to spatial data for use in analyses and generating graphics (i.e ... . maps) in R the CCAMLRGIS R package has been upgraded to provide direct access to polygon data that can ... be viewed on the online GIS. This package can also be used to create polygon data that can either be used ... GIS. In this paper we provide information on the data format requirements for generating polygon data ...
Meeting Document : WG-SAM-17/47 : Author(s): CCAMLR Secretariat
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Historical data synthesis in the Southern Ocean: Priority data sets
data sets to enable investigation of long-term, large-scale ecosystem dynamics across the Southern ... Ocean. Historical data sets have a particular value in providing ‘baseline’ physical and biological data ... give an example of an historical data rescue project that is being conducted by ICED scientists ... and integration to aid monitoring and management of Southern Ocean ecosystems. We invite data holders to supply ...
Meeting Document : WG-EMM-13/19 : Author(s): N.M. Johnston, E.J. Murphy, J.R.D. Silk, C.M. Waluda, S.L. Hill and R.D. Cavanagh (United Kingdom) on behalf of the ICED Scientific Steering Committee
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Using krill length data from fishery-dependent and fishery-independent data sources to measure changes in the Antarctic krill population structure in the Bransfield Strait
Abstract: Krill length data collected from fishery-dependent and fishery-independent data sources ... were analysed for trends in population structure. Krill length data collected by the Scheme ... both data sources appeared to be tracking similar processes. CEMP data revealed patterns in population ... in population structure and recruitment. Analysis demonstrates the importance of using long-term data collected ...
Meeting Document : WG-EMM-2019/76 : Author(s): CCAMLR Secretariat
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CEMP data summary and updated analysis of CEMP data from Subarea 48.
in accordance with the ‘ecosystem approach’. This report provides: Details on CEMP data that have been ... season A summary of available CEMP data and metadata and any issues encountered with data submitted ... to the Secretariat. An update on the spatial analysis of CEMP data in subarea 48.1 using Combined Standardised ... Indices (CSIs) for Breeding Seasons parameters and population size data. Author(s): CCAMLR Secretariat ...
Meeting Document : WG-EMM-17/17 : Author(s): CCAMLR Secretariat
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Growth models for D. eleginoides for the Heard Island plateau region (Division 58.5.2) calibrated from otolith-based length at age data and validated using mark-recapture data
Abstract: Length-at-age data for the Patagonian toothfish (Dissostichus eleginoides) caught ... than 20 years the general trend in the data of length with age did not exhibit obvious asymptotic ... of 2000 mm but the fit to the data was very poor. The Akaike Information Criterion indicated ... that the 2-segment linear model gave the best fit to the length-age data. We compare predictions from these models ...
Meeting Document : WG-FSA-05/64 Rev. 1 : Author(s): S.G. Candy, T. Lamb, A.J. Constable and R. Williams (Australia)
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Reconciliation of CDS data with monthly fine-scale catch and effort data
Abstract: The reconciliation of CDS data with monthly fine-scale catch and effort data has ... is ongoing. Author(s): CCAMLR Secretariat Title: Reconciliation of CDS data with monthly fine-scale catch ... and effort data Microsoft Word File: cc-38-bg-11.docx Approval: Approved Secretariat Workflow Status ... The reconciliation of CDS data with monthly fine-scale catch and effort data has demonstrated ...
Meeting Document : CCAMLR-38/BG/11 : Author(s): CCAMLR Secretariat