Resultados de la búsqueda
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Approaches to the simplification of the summary and presentation of CEMP data
Abstract: The current approach to providing advice on the status of the krill-centric ecosystem ... relies on the evaluation of statistical anomalies in the CEMP database. A new approach based on the ... ordination of variables according to functional groupings is suggested. This approach uses the methodology ... data to summarise the variability in CEMP parameters. Author(s): K. Reid (United Kingdom) and G ...
Meeting Document : WG-EMM-04/61 : Autor(es): K. Reid (United Kingdom) and G. Watters (USA)
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PRELIMINARY ASSESSMENT OF MACKEREL ICEFISH, CHAMPSOCEPHALUS GUNNARI, IN THE VICINITY OF HEARD ISLAND AND MCDONALD ISLANDS (DIVISION 58.5.2), BASED ON A SURVEY IN APRIL 2009, USING THE GENERALISED YIELD MODEL
58.5.2 in the vicinity of Heard Island in April 2009 to provide the information for an assessment of ... short-term annual yield in the 2009/2010 CCAMLR season. This paper provides a preliminary assessment of ... yield for the area of Division 58.5.2 to the west of 79o 20’ E using standard CCAMLR methods. The strong ... year class detected in the last two years’ surveys is now fully recruited as the 3+ cohort, and ...
Meeting Document : WG-FSA-09/33 : Autor(es): D.C. Welsford (Australia)
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REPORT ON A LONGLINE SURVEY CONDUCTED BY THE FV JANAS IN MAY 2008 ON BANZARE BANK, AND AN ASSESSMENT OF THE STATUS OF DISSOSTICHUS SPP. IN DIVISION 58.4.3B
strata covering areas of commercial fishing activity was conducted from aboard the Australian flagged ... across the majority of the surveyed area. Catches of toothfish consisted of both species of Dissostichus ... , with D. mawsoni found across the entire survey area while D. eleginoides was mainly found on the ... shallow areas on the western part of the Bank. Data on size distribution and size at maturity indicate ...
Meeting Document : WG-FSA-08/57 : Autor(es): D. Welsford, T. Robertson and G. Nowara (Australia)
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YEAR OF THE SKATE SAMPLING PROTOCOL: LEARNING FROM THE 2007–08 SEASON SAMPLING PROTOCOL ON NZ VESSELS
Abstract: Skates are an important bycatch of the toothfish fishery in the CCAMLR area and have ... paragraph 8.10) a review of data requirements and a “Year of the Skate” for 2008–09 whereby data collection ... assessment. This paper discusses improvements to the fishery derived data that may be required to better ... inform an assessment of Ross Sea skates. We propose options for the appropriate collection of such data ...
Meeting Document : WG-FSA-08/49 : Autor(es): S. Mormede (New Zealand)
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Stability of trip selections for the assessment of Antarctic toothfish in the Ross Sea
Abstract: A dataset for the 2009 assessment of Antarctic toothfish (Dissostichus mawsoni) in the ... Ross Sea was selected on the basis of data quality metrics for individual trips. Initial informative ... tags, and/or where tags released on the trip were subsequently recaptured at a high rate. These trips ... to tagging data. Other trips with data quality metric values within these ranges were added to the ...
Meeting Document : WG-FSA-10/26 : Autor(es): D.A.J. Middleton (New Zealand)
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Results of the first winter longline survey to the northern Ross Sea region to investigate toothfish reproductive life history
Abstract: The first winter longline survey of Antarctic toothfish in the northern Ross Sea region ... the 4 strata, and 55.2 t of Antarctic toothfish and 3.4 t of Patagonian toothfish were caught ... . Spawning and spent Antarctic toothfish were captured late in the survey on undersea features to the ... male fish caught during the survey than during the summer fishery (73% vs. 60–65%), and the sex ratio ...
Meeting Document : WG-FSA-16/37 : Autor(es): D. Stevens, D. Di Blasi and S. Parker
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Preliminary assessment of Patagonian toothfish, Dissostichus eleginoides, in the vicinity of Heard Island and McDonald Islands (Division 58.5.2), based on a survey in May–June 2006 using the Generalised Yield Model
58.5.2 in the vicinity of Heard Island in May-June 2006 to provide the information for an assessment of ... short-term annual yield in the 2006/2007 CCAMLR season. This paper provides a preliminary assessment of ... yield for the area of Division 58.5.2 to the west of 79°20’ E using standard CCAMLR methods. It also ... investigates the impact on the recruitment series and predicted yields of: i) excluding the unusually high ...
Meeting Document : WG-FSA-06/45 Rev. 1 : Autor(es): D.C. Welsford, A.J. Constable, T. Lamb and T. Robertson (Australia)
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A review of rattail (Macrourus spp.) and skate by-catch and analysis of standardised CPUE, for the exploratory fishery in the Ross Sea (CCAMLR Subareas 88.1 and 88.2) from 1997/98 to 2004/05
rattails (Macrourus spp.) and skates in the exploratory fishery for toothfish in the Ross Sea (CCAMLR ... Subareas 88.1 & 88.2). The analysis was based on fine-scale haul-by-haul (C2) data and observer data ... from all vessels in the fishery from 1997/98 to 2004/05. The major factors influencing rattail bycatch ... were vessel, area, and depth. Catch rates of rattails were highest along the shelf edge (SSRUs 88.1E ...
Meeting Document : WG-FSA-05/24 : Autor(es): S.L. Ballara and R.L. O’Driscoll (New Zealand)
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Demography of Antarctic krill in the Lazarev Sea (Subarea 48.6) and the Elephant Island area (Subarea 48.1) in 2004
Abstract: Standardized krill net sampling surveys were conducted in the Lazarev Sea (Subarea 48.6 ... ) in April 2004 and in the Elephant Island area (Subarea 48.1) in January and February/March 2004 ... . Krill densities in the Elephant Island area were below the long-term average which mark a substantial ... decline after the good krill years in 2001 and 2002. Krill density was lower in the Lazarev Sea, even ...
Meeting Document : WG-EMM-04/23 : Autor(es): V. Siegel (Germany), V. Loeb (USA), B. Bergström (Sweden), S. Schöling (Germany), M. Haraldsson (Sweden), J. Kitchener (Australia), M. Vortkamp (Germany)
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Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (Subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish
Abstract: A revised bathymetric map of the South Orkney Islands (Subarea 48.2) was generated ... using several integrated bathymetric databases and newly available acoustic seafloor data. The region ... extends from 60.2ºS-62.2ºS latitude and 42.5º-47.5º longitude. From the integrated data sets, areas of ... seabed within the 500 m isobath were computed for 50 m depth intervals. Areas were calculated based on ...
Meeting Document : WG-FSA-99/33 : Autor(es): C.D. Jones (USA)