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1. On the state of Champsocephalus gunnari stock in Subarea 48.3 and methods of its assessment

   2000 showed clearly a necessity to revise the methods of icefish (which is near-bottom and pelagic fish ... species) biomass assessment based on the results of bottom trawl surveys. A question on unreliability of ... ) both during the period of the icefish fishery in 1980s and after its ceasing in 1990s. In all cases, a ... , catch per unit effort (CPUE), and calculations by VPA showed a clear underestimation of the stock (Table ...

   Meeting Document : WG-FSA-00/45 : Autor(es): K. Shust, V. Senioukov, P. Gasiukov and A. Kozlov (Russia)

2. Towards developing diagnostics tools for fishery stock assessments

   Abstract:  In this paper, we describe developments towards a set of standard diagnostic principles ... and tools used to characterise assessment models. CCAMLR has yet to develop a set of recommended ... statistical diagnostics tools to support their evaluations. While there are a number of standard visual and ... statistical diagnostics available for integrated assessments, their sufficiency to evaluate if a model is well ...

   Meeting Document : WG-SAM-15/26 : Autor(es): P. Ziegler, P. Burch, A. Constable (Australia), C. Darby (United Kingdom), A. Dunn (New Zealand), C. Jones, D. Kinzey (USA), S. Mormede (New Zealand) and D. Welsford (Australia)

3. Using production models to assess the stock of Paralomis spinosissima around South Georgia Island

   Abstract:  Four production models were fit to a time series of daily catch per unit effort (CPUE ... considered recruitment in different ways. Model 1 contained a linear recruitment function; Model 2 had ... constant recruitment; Model 3 contained a Beverton-Holt recruitment function, and Model 4 used a Ricker ... abundance (N0), an estimate of the scaling coefficient relating abundance to CPUE (q), and a recruitment ...

   Meeting Document : WG-FSA-93/23 : Autor(es): George Watters (USA)

4. Update on the Top Predator Alliance project, 2013–14 season: Killer whales

   reliance on toothfish as a critical prey item, have limited our ability to (a) assess the risk posed by the ... toothfish parts; no consumption of non-fish prey by TCKW was detected.  We also observed a large number of ... TCKW with small and presumably suckling calves.  Given that lactation represents a significant energy ... lactation.  A comparison of energy expenditure with energy densities of fish prey indicates that available ...

   Meeting Document : WG-EMM-14/52 : Autor(es): R. Eisert, M.H. Pinkerton (New Zealand), L. Torres (USA), R.J.C. Currey, P.H. Ensor, E.N. Ovsyanikova, I.N. Visser (New Zealand) and O.T. Oftedal (USA)

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

   . Furthermore, CEMP data cannot be used in a standard environmental impact assessment framework as they lack ... an important challenge. Potential strategies are likely to consist of a method for inferring impacts ... and a schedule of tactical interventions in response to these impacts (e.g. restrictions on fishing ... activity). We discuss a range of inference methods which are tractable using CEMP data. These methods ...

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

6. Investigating emigration in stock assessment models of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–H

   Abstract:  In 2013, the Scientific Committee of CCAMLR could not achieve consensus on a stock ... the recaptures of tagged fish seen in the SSRU 88.2H fishery. The patterns showed a sharp decay rate ... of a cohort of tagged fish with few being recaptured after more than 3 years at liberty, a steepening ... of the decay rate over time, and a trend for increasing proportions of tagged fish caught over time ...

   Meeting Document : WG-FSA-14/56 : Autor(es): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)

7. Results of the sixth Ross Sea shelf survey to monitor abundance of sub-adult Antarctic toothfish in the southern Ross Sea, January 2017

   Abstract:  At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... abundance from a well-designed survey could be a useful input into the Ross Sea stock assessment model. In ... southern Ross Sea (Strata A–C) using standardised gear in a standardised manner; and monitoring trends in ... . Scaled length frequencies for the core strata indicate the progression of a strong year class that ...

   Meeting Document : WG-SAM-17/01 : Autor(es): K. Large, L. Robinson and S. Parker

8. Draft Krill Fishery Report

   Abstract:  At WG-EMM 2013 the Working Group agreed that it would be useful to have a consolidated ... summary of information related to the krill fishery in a similar format to the fishery reports that are ... the preparation of a draft krill fishery report for consideration at WG EMM-14 that would be similar ... in content to a finfish Fishery Report. The following compilation of information on the krill fishery ...

   Meeting Document : WG-EMM-14/58 : Autor(es): Secretariat

9. DRAFT SOFTWARE USER GUIDE FOR: ICESCAPE: INTEGRATING COUNT EFFORT BY SEASONALLY CORRECTING ANIMAL POPULATION ESTIMATES

   Abstract:  The ICESCAPE Software Users Guide (Appendix 1) describes a parametric bootstrap ... (2004) for Antarctic land-breeding predators. The software, which was developed as a suite of routines ... a breeding cycle when the availability fraction is substantially different from unity. Adjustment ... for availability standardises counts to a common reference point of breeding chronology, and is ...

   Meeting Document : WG-SAM-09/16 : Autor(es): J. McKinlay, C. Southwell and R. Trebilco (Australia)

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

    Ross Sea were identified to species. Sample sizes were small, but indicated a ratio of 10.75:1 of ... Amblyraja georgiana to B. cf. eatonii, which is consistent with a previous estimate based on a large sample ... length-weight regression relationships for male and female A. georgiana confirmed that male and female ... relationships differ significantly. Better estimates of median length at maturity were made possible through a ...

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

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