Résultats de la recherche

1. LENGTH-BASED ASSESSMENT FOR MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3

   projects these numbers forward under the given harvest control rule to set a two‐year TAC. One issue is the ... accurate identification of age cohorts from the survey data. In this paper we describe a length‐based ... approach that removes the problem of cohort determination. A stratified bootstrap technique (consistent ... the population numbers‐at‐length. A comparison of this method and the existing age‐based CMIX/GYM ...

   Meeting Document : WG-FSA-09/27 : Auteur(s): R.M. Hillary (Australia), C.T.T. Edwards, R.E. Mitchel and D.J. Agnew (United Kingdom)

2. Population assessment of Patagonian toothfish in Subarea 48.4

   Subarea 48.4. The Subarea is divided into two management regions and assessed using a CASAL assessment of ... D. eleginoides in the northern region and a simple Petersen biomass estimate derived for D ... has been retained although a small number of changes have been made to try to improve the fit of the ... model and to reduce the dependency on a relatively small amount of data. These changes comprise the ...

   Meeting Document : WG-FSA-12/36 : Auteur(s): R. Scott (United Kingdom)

3. Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2014–15

   Subareas 88.1 and 88.2 through the 2015 season. A total of 44 827 Antarctic toothfish have been released ... catch in the Ross Sea region. Tag recapture data showed that most fish are recaptured only a short ... distance from their point of release, typically less than 100 km. However, a small proportion of tagged ... in 2015, close to the recent average. SSRU 88.2H showed a similar annual number of tag returns ...

   Meeting Document : WG-FSA-15/37 : Auteur(s): S.J. Parker and S. Mormede (New Zealand)

4. High-resolution ocean modelling of the South Georgia and South Orkney Islands regions

   South Orkney Islands is highly productive, with a history of commercial exploitation. Many of the key ... regions. The models are regional applications of NEMO with a ~3 km horizontal resolution, and include key ... reanalysis, a seasonal glacial melt cycle, and with sea ice processes incorporated using LIM3.  The models ... will be used to generate a ~20 year time series of oceanographic flows and water mass properties, which ...

   Meeting Document : WG-EMM-16/15 : Auteur(s): E. Young, E. Murphy and P. Trathan

5. Developing robust biomass estimates and advice on catch limits in research blocks

   different biomass estimates be provided. In this paper, we develop a modified CPUE by seabed area method ... by the stock assessment model as the reference biomass. We demonstrate evidence of a linear ... density estimates from Shelf/Slope and North habitat types from the Ross Sea can be used to estimate a ... CPUE by seabed area biomass in designated research blocks. We also develop a Bayesian approach that ...

   Meeting Document : WG-SAM-17/37 : Auteur(s): S.J. Parker, S. Mormede, A. Dunn, S.M. Hanchet and C. Marsh

6. Report to the Scientific Committee for the Conservation of Antarctic Marine Living Resources on the outcomes of the EU-H2020 Project ‘Mesopelagic Southern Ocean Prey and Predators (MESOPP)’ and its utility to SC-CAMLR

   EU and Australia through two implementation actions Propose a R&D roadmap to support a large ... enhancement of collaborations by eliminating various obstacles in establishing a common methodology and a ... models. It will also contribute to a better predictive understanding of the SO based on furthering the ...

   Meeting Document : SC-CAMLR-38/BG/30 : Auteur(s): A.J. Constable, P. Lehodey and P. Koubbi

7. Best practice seabird by-catch mitigation for Spanish-rig longline vessels with emphasis on line weighting regimes

   Abstract:  The Spanish system is used in a range of demersal and semi-pelagic longline fisheries ... throughout the southern hemisphere and has been the source of a large number of seabird fatalities. An ... experiment was conducted on a chartered Spanish-rig vessel to improve the sink rate of longlines to reduce ... determined by time-depth recorders attached to lines. Separately, a trial was conducted to determine ...

   Meeting Document : WG-FSA-06/22 : Auteur(s): G. Robertson (Australia), C.A. Moreno (Chile), B. Wienecke (Australia), P. Gandini (Argentina), G. McPherson (Australia) and J.-P. Seco Pon (Argentina)

8. Further development of pairwise tag detection performance index and its application to the stock assessment of toothfish in the Ross Sea fishery

   sustainable yields. The assessment model assumes that all vessels have equal tag detection rates; as a ... -specific tag detection performance for the Ross Sea fishery using a case-control methodology which controls ... location (i.e. in the same fishing season and within a specified distance).  The index was calculated as ... the matched control hauls. By iterating over all events for all vessels, we generated a relative index ...

   Meeting Document : WG-SAM-13/34 : Auteur(s): S. Mormede (New Zealand)

9. Comparing surface and planimetric area across multiple scales and assessing the impact of different data sources on seabed area estimation in research blocks in the CAMLR Convention Area

   scientific survey designs and models of habitat use.  Planimetric seabed areas (i.e. a two-dimensional ... surface) within the Convention area are commonly calculated, but surface area (i.e. a three-dimensional ... differences between surface and planimetric areas within fishable depth ranges at the scale of a research ... based on the current CPUE-analogy calculations. However, in many of the research blocks a higher ...

   Meeting Document : WG-SAM-15/01 : Auteur(s): CCAMLR Secretariat

10. Information on the spawning season and gonadosomatic indices of Dissostichus mawsoni from Subarea 88.1 in the 2001/02 season

    season was identified as late autumn (May). A significant difference in the condition of fish between ... summer and autumn was noted, and this may be a result of migration f or spawning. The maximum GSI ... recorded for females was 26% with a 7.5 kg ovary. The maximum GSI was 43% for a stage 3 male weighing 20 kg ...

    Meeting Document : WG-FSA-02/31 : Auteur(s): G.J. Patchell (New Zealand)

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