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1. An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data

   analyses in other exploratory toothfish fisheries should be investigated, as this study indicates that ... depletion analysis of stratified catch and effort data indicate that there is strong evidence for depletion ... result, coupled with high estimated levels of illegal, unreported and unregulated (IUU) fishing, and ... evidence of poor recent recruitment, indicates that the stock is likely to have been overfished. Several ... period. Furthermore, IUU activity seems to be increasing, with catches estimated to have exceeded the ... likely to be low (Dunn et al., 2007; Welsford et al., 2007b), it is a rea- sonable assumption that each ... longlines failed to capture any D. mawsoni, compared with 485 long- lines (75% of total effort) that ... ( C ) lo ng lin es d ep lo ye d ) an d c at ch ( nu m be rs a nd w ei gh t fo r ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Autor(es): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara

2. Age-structured production model for toothfish at South Georgia

   decaying function of age, with three easily interpretable parameters. When only a single selectivity curve ... frequency data achieved last year, but the fit was still poor. The fit to the CPUE was also poor. With ... selectivity parameters allowed to be estimated on an annual basis the fits are substantially improved. However ... , by allowing all parameters to be estimated in this way the model is over-parameterised and regularly ...

   Meeting Document : WG-FSA-SAM-05/18 : Autor(es): A. Payne, G.P. Kirkwood, R. Hillary and D.J. Agnew (United Kingdom)

3. THE SELECTION OF TRIPS BASED ON DATA METRICS FOR THE ASSESSMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA

   trips were used to define a range for various data quality metrics considered to be informative with ... informative datasets were selected comprising trips with high (above median) rates of recovery of previously ... respect to tagging data. Other trips with data quality metric values within these ranges were added to the ... dataset. Where the initial informative dataset was selected comprising trips with above median rate of tag ...

   Meeting Document : WG-FSA-09/35 : Autor(es): D.A.J. Middleton (New Zealand)

4. Evaluating length-frequency data and length-based performance indicators in new and exploratory fisheries

   been difficult. In this paper, we show that length-frequency data on their own have little inherent ... conclusive information about stock status. While length-frequency data can be useful in assessments when ... integrated with other more informative estimators for stock abundance and productivity, interpretation of ... trends in length-frequency data can be misleading and should be avoided. Author(s):  P.E. Ziegler, D.C ...

   Meeting Document : WG-FSA-10/43 : Autor(es): P.E. Ziegler, D.C. Welsford and A.J. Constable (Australia)

5. Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ground of Subarea 48.1 during the 1990/91 austral summer

   were generated, suggesting that hydrodynamic convergence might be responsible for accumulation of krill ... neritic and nearshore zones. This indicates that slope frontal features may be important for the formation ... in this zone. The total biomass over the survey area was estimated to be 1.59±0.45 million tonnes (95 ... + neritic + nearshore zones). Information from other studies indicated that krill biomass in this region had ... . This indicates that slope frontal features may be important for the formation of favourable conditions ... i-th zone Ni = number of transects in i-th zone t(Jl, a) = student's t-distribution with Jl ... ). This implies that the least favourable feeding environment might be responsible for the lower krill ... , comparing the two deeper zones (slope frontal and oceanic) the former zone may be more favourable in that ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 183–199 : Autor(es): Ichii, T., H. Ishii and M. Naganobu

6. Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.1

   that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of coefficient ... variance of biomass estimate from the bootstrapped procedure, under the condition that the exploitation ... sizes turned out to be larger in many blocks and smaller in a few blocks over the data poor-fisheries ... least 3 years with the same sample size as decided at the last CCAMLR meeting for the current research ...

   Meeting Document : WG-FSA-13/38 : Autor(es): Delegation of Japan

7. Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.2

   such a way that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of ... coefficient variance of biomass estimate from the bootstrapped procedure, under the condition that the ... sizes turned out to be larger in many blocks and smaller in a few blocks over the data poor-fisheries ... least 3 years with the same sample size as decided at the last CCAMLR meeting for the current research ...

   Meeting Document : WG-FSA-13/39 : Autor(es): Delegation of Japan

8. Results of the fourth CCAMLR sponsored research survey to monitor abundance of sub-adult Antarctic toothfish in the southern Ross Sea, February 2015 and further development of the time series

   of high sub-adult abundance that could be included as strata in future annual surveys. The 2015 ... 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. The ... survey is consistent with the decline in the abundance of this cohort through time through mortality and ...

   Meeting Document : WG-SAM-15/44 : Autor(es): S.M. Hanchet, B.R. Sharp, S. Mormede, S.J. Parker (New Zealand) and M. Vacchi (Italy)

9. Migrations of Antarctic fish Pseudochaenichthys georgianus Norman, 1939 in the Scotia Sea

   mostly young, small fishes. They have stomach filled well with krill so swim probably to match with ... distribution of krill, which flow further to North and East with geostrophic currents. Following after them ... , with stomach often full of them, they became large, so the numbers of small individuals are ... get warmer. Finally at the end of Scotia Arc Islands- at South Orkney, P. georgianus are large with ...

   Meeting Document : WG-FSA-12/68 Rev. 1 : Autor(es): R. Traczyk (Poland)

10. Defining predator foraging ranges, illustrated using Adélie penguin foraging tracks from Mawson coast

    likely to be foraged by predators from one year to the next, i.e. what is a predator’s feeding range ... taking into account interannual variation in foraging locations? This paper considers the issues to be ... addressed in answering that question. The proposed method for defining foraging ranges is based on an ... these foraging ranges for the purposes of small-scale management units may need to be examined in three ...

    Meeting Document : WG-EMM-02/41 : Autor(es): I.R. Ball, A.J. Constable, J. Clarke and L. Emmerson (Australia)

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