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1. Update of the Antarctic toothfish stock assessment for the Ross Sea by means of the TSVPA separable cohort model

   Abstract:  An updated Antarctic toothfish (in the Ross Sea) stock assessment was done by means of ... the TISVPA model (2006 data on catch-at-age and cpue and the data on tag recaptures were included ... ). All the three sources of information taken separately (and together) indicate historical increase in ... Antarctic toothfish stock assessment for the Ross Sea by means of the TSVPA separable cohort model Approval ...

   Meeting Document : WG-SAM-07/9 : Автор(ы): D. Vasilyev, K. Shust, V. Babayan and T. Bulgakova (Russia)

2. UPDATED BIOLOGICAL PARAMETERS FOR THE ANTARCTIC STARRY SKATE, AMBLYRAJA GEORGIANA, FROM THE ROSS SEA

   Abstract:  Photographs of skates taken by observers on New Zealand toothfish longliners in the ... Amblyraja georgiana to B. cf. eatonii, which is consistent with a previous estimate based on a large sample ... of tagged skates. Biological parameters were reviewed and updated for Amblyraja georgiana. Revised ... length-weight regression relationships for male and female A. georgiana confirmed that male and female ...

   Meeting Document : WG-FSA-08/20 : Автор(ы): M.P. Francis and S. Mormede (New Zealand)

3. The use of electronic monitoring camera system for the toothfish fishery in CCAMLR Subarea 48.3: a study case to help CCAMLR

   CCAMLR observers deployed on the fishing fleet. The collection of this data is important for the ... requires considerable effort and cost with mixed results.  For example it is not always possible to achieve ... a reasonable figure/rate of line observation for each setting of the lines. A video recording system ... was installed on a longliner targeting toothfish in CCAMLR Subarea 48.3. This system provided 100% of ...

   Meeting Document : WG-FSA-14/27 : Автор(ы): R.A. Benedet (United Kingdom)

4. Progress towards a trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery

   Abstract:  We report on the further development of a carbon-budget trophic-model of the Ross Sea ... with which to investigate effects of the fishery for Antarctic toothfish (Dissostichus mawsoni). The ... balanced, due in part to limited information on diet fractions of Ross Sea organisms. Methods to adjust ... considerable predation pressure on some species of demersal fish. The significance of toothfish in the diets of ...

   Meeting Document : WG-EMM-06/14 : Автор(ы): M. Pinkerton, S. Hanchet and J. Bradford-Grieve (New Zealand)

5. Size selectivity of the RMT8 plankton net and a commercial trawl for Antarctic krill

   study on krill damaged during trawling operations indicates an effect of trawling duration and total ... has been studied. Selection curves indicate that krill length classes smaller 20 mm are ... underrepresented in the RMT8. For the commercial trawl with a liner mesh size of 12mm the length classes smaller 35 ... and 45 mm are undersampled, probably depending on the size composition of the catch. A preliminary ...

   Meeting Document : WG-EMM-07/28 : Автор(ы): V. Siegel (Germany)

6. Assessing data requirements for tag-based estimates of local biomass in data-poor and exploratory fisheries

   Abstract:  This study used an operating model to simulate a Dissostichus eleginoides population in ... impact on the numbers of tagged fish recaptures and accuracy of tag-based estimates using the Chapman ... will have a high risk of over-estimating biomass and that for a given number of tagged fish available a ... minimum numbers of recaptures are required to ensure a low likelihood of biomass overestimation. For ...

   Meeting Document : WG-SAM-17/13 : Автор(ы): L. Robinson, P. Burch and K. Reid

7. Analysis of observer coverage for Japanese krill fishing vessels

   had the largest impacts, and year coverage had moderate impacts on CV for both mean krill length and ... explore proper allocation of scientific observers on Japanese krill fishing vessels using the data from ... 1995 to 2008. Based on the multistage sampling theory, we derived the equation of variance in four ... bycatch. Fish bycatch required moderate coverage for haul but low improvement were made by increasing ...

   Meeting Document : WG-SAM-10/17 : Автор(ы): T. Okuda, M. Kiyota and H. Okamura (Japan)

8. Revised assessment models for Patagonian toothfish in research block C of Division 58.4.4, Ob and Lena Banks

   highest for models on the assumption of 22% of total IUU catch and lowest for models with assumption of no ... were set as follows: parameters for ALK (k, Linf and t0) were fixed; year class strength (YCS) was ... Abstract:  I made six sensitive runs of CASAL models (LENGTH/AGE_IUU_MODEL) for stock status ... during the latest WG-SAM meeting. The six models with three kinds of assumptions on IUU catch were ...

   Meeting Document : WG-FSA-14/23 : Автор(ы): K. Taki (Japan)

9. OPTIONS FOR USING UNREPLICATED ECOSYSTEM MONITORING DATA TO DETECT IMPACTS

   an important challenge. Potential strategies are likely to consist of a method for inferring impacts ... interventions based on subtle indications of an impact. Our example impact was characterised by an increase in ... control sites. Identifying how these data could be used in an ecosystem management strategy is therefore ... and a schedule of tactical interventions in response to these impacts (e.g. restrictions on fishing ...

   Meeting Document : WG-EMM-09/26 : Автор(ы): S. Hill, J. Forcada, P. Trathan and C. Waluda (United Kingdom)

10. The Antarctic toothfish: how common a prey for Weddell seals?

    common (as evidenced by more than 30 years of sustained research projects on that toothfish population ... Abstract:  Reported herein are observations of Weddell seals (Leptonychotes weddellii) feeding on ... the quantity of toothfish captured lead us to suggest that this species is a significant prey item for ... ). Author(s):  P.J. Ponganis and T.K. Stockard (USA) Title:  The Antarctic toothfish: how common a prey for ...

    Meeting Document : WG-EMM-07/P4 : Автор(ы): P.J. Ponganis and T.K. Stockard (USA)

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