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1. Investigation of the sensitivity of the Ross Sea toothfish assessment to withholding subsets of the available data

   model outputs of withholding from a stock assessment between one and eight years of age frequency and/or ... very sensitive to changes in years of tag release and recapture data available to the model. For ... the effect of not updating an assessment every year, and also the evolution of stock assessments with ... CCAMLR areas using integrated statistical catch-at-age stock assessment models. These models were ...

   Meeting Document : WG-SAM-11/17 : Автор(ы): S. Mormede (New Zealand)

2. Modifications to the Generalised Yield Model in 2004, version GYM501E.EXE

   recruitment age and greater. This calculation needed to be made general to allow for many years younger than ... fish at the nominated ‘recruitment age’ (age 4 for toothfish) in each year. The first year in the time ... . This was coded specifically for the case of surveys observing fish of ages one year younger than the ... of reviewing the methods for estimating the time series of recruitments of D. elegionoides for WG-FSA ...

   Meeting Document : WG-FSA-04/91 : Автор(ы): A.J. Constable (Australia)

3. Unhappy feet: the reduction of Adélie and chinstrap penguin populations in the West Antarctic Peninsula/Scotia Sea

   chinstrap penguin populations have declined more than 50% during the last 30 years at study colonies in the ... Abstract:  New and alarming evidence has been published by Trivelpiece et al. recently about the ... for its revision. Author(s):  Submitted by ASOC Title:  Unhappy feet: the reduction of Adélie and ... Workflow Status:  Content Approved Document Release Consent:  Yes Delegation responsibility for releasing ...

   Meeting Document : CCAMLR-XXX/BG/21 : Автор(ы): Submitted by ASOC

4. Catches of target species in the Convention Area

   reported to 30 20 September 2018,  are presented with dates of closures of fisheries implemented by the ... conducted in accordance with Conservation Measure 24-01. Monthly catch totals for 2017/18,   based on data ... Document Release Consent:  No Delegation responsibility for releasing documents:  CCAMLR Secretariat ...

   Meeting Document : SC-CAMLR-XXXVII/BG/01 Rev. 4 : Автор(ы): CCAMLR Secretariat

5. Feasibility of lead-radium dating the otoliths of blackfin icefish (Chaenocephalus aceratus) and ocellated icefish (Chionodraco rastrospinosus)

   levels, led to age determinations that had a high margin of uncertainty; however, the findings led to an ... , but would provide the opportunity to make an age determination that does not reply on growth zone ... few years of growth) is possible for these species, provided there is enough sample mass and perhaps ... Abstract:  Application of lead-radium dating was attempted as a feasibility study for otoliths of ...

   Meeting Document : WG-FSA-10/17 : Автор(ы): A.H. Andrews, M. La Mesa and J. Ashford (USA)

6. Zooplankton target strength: volumetric or areal dependence?

   acoustic backscattering on animal volume or area was tested by fitting regression lines for TS versus the ... ) nor this experiment directly accounted for animal orientations. Simulations using a Distorted Wave ... Born Approximation Model (Chu et al., 1993), indicated that animal behavior is an important factor in ... cylindrical radius). The theoretical models chosen for this comparison were two versions of a high-pass bent ...

   Meeting Document : WG-Krill-94/13 : Автор(ы): D.A. Demer and L.V. Martin (USA)

7. 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 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 ... yield for the area of Division 58.5.2 to the west of 79°20’ E using standard CCAMLR methods. A lack of ... an estimated 80% of the biomass present during the survey, are unlikely to be available to the ... fishery next year, yield estimates for 2006/07 are a further 70% lower. Author(s):  D.C. Welsford ...

   Meeting Document : WG-FSA-06/43 Rev. 1 : Автор(ы): D.C. Welsford (Australia)

8. Foraging behaviour of Antarctic fur seals during periods of contrasting prey abundance

   Abstract:  Published in Journal of Animal Ecology (1994) 63, 000-000 Author(s):  I.L. Boyd, J.P.Y ...

   Meeting Document : WG-CEMP-94/12 : Автор(ы): I.L. Boyd, J.P.Y. Arnould, T. Barton and J.P. Croxall (United Kingdom)

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

   bottom trawl surveys conducted by research and small-tonnage fishery vessels and used for the icefish ... stock assessment was repeatedly raised on the meetings of Working Group on Fish Stock Assessment (WGFSA ... 1). Now, having obtained once again good fishery and scientific data for comparison, it became ... icefish concentrations reaches 40-50 m;- at scientific trawlings the use of trawls with mesh less than 80 ...

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

10. Squeezed from both ends: Decline in Antarctic fur seals in the South Shetland Islands driven by both Top–down and Bottom–up processes

    .  This has led to an under emphasis of the role of bottom-up drivers for controlling fur seal production ... production estimates from 2002-2012 for Cape Shirreff, Livingston Island.  Age-specific natality rates are ... poor recruitment and an aging population.  However, age-specific natality rate has also declined ... Antarctic bottom-up processes are widely cited for explaining penguin population declines, whereas for ...

    Meeting Document : WG-EMM-14/39 : Автор(ы): M.E. Goebel and C.S. Reiss (USA)

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