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1. Editorial

   the Southern Ocean. In particular there is a suite of papers that address key aspects of improving ... of analysis of data gathered on fishing vessels to using trends in patents to predict the future for ... specialist groups as well as the more traditional peer-review process. The papers in this volume of CCAMLR ... fishing in the Convention Area. For example, in the case of toothfish there are papers that develop our ... . In particular there is a suite of papers that address key aspects of improving assessment of the ... analysis of data gathered on fishing vessels to using trends in patents to predict the future for krill ... well as the more traditional peer-review process. The papers in this volume of CCAMLR Science broadly ... reflect the important areas of research used to provide advice on the management of fishing in the ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 167 : Author(s): Editors

2. Investigations of required sampling regimes for environmental parameters

   significacion ex de 0.05 y una potencia P de 0.9. 1. IN1RODUCflON Monitoring of selected environmental ... / Description:  The sensitivity of different sampling regimes in identifying inter-annual changes in ... 1987. Strong daily, depressional (4 to 5 days) and yearly cycles were seen in temperature, wind speed ... and pressure. Sampling daily maxima and minima would be sufficient to detect a 2 to 3°C change in ... speed continuously or as daily maxima and minima would be sufficient to detect a 10 to 20% change in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Author(s): Agnew, D.J.

3. A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region

   – Antarctic Peninsula region Abstract / Description:  Expansion of the krill fishery in the Scotia Sea ... compiles parameters for use in the ecosystem dynamic models that are needed to assess these methods. These ... species that feed on krill in this region. Maximum krill transport rates are also derived from the OCCAM ... are provided where possible. The results suggest that fish are the major krill consumers in all SSMUs ... the krill fi shery in the Scotia Sea–Antarctic Peninsula region beyond the current operational catch ... amongst smaller spatial units. This paper compiles parameters for use in the ecosystem dynamic models ... parameters for the fi sh, whale, penguin and seal species that feed on krill in this region. Maximum krill ... suggest that fi sh are the major krill consumers in all SSMUs, with perciform fi sh taking as much krill ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Author(s): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters

4. Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia

   interval of three years with no fishing in between; and changes in net selectivity resulting in a shift in ... fishing proved to be the least preferable harvesting alternative. In the absence of regular recruit ... , should not occur earlier than four years after a good recruitment. A forward shift in partial recruitment ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Author(s): Köster, F.W. and K.-H. Kock

5. Catch-at-age analysis applied to new fisheries: the case of Dissostichus eleginoides

   Abstract / Description:  Traditionally, the approach used in the assessment of new fisheries has been based ... resource by coarse methods. The main aim of such surveys is to monitor fishing operations in order to ... develop a comprehensive sampling design which will provide data in line with assessment procedures that ... are quite similar to those commonly used in the statistical sampling theory. These procedures are, to ... , the approach used in the assessment of new fisheries has been based on research surveys, making it ... of such surveys is to monitor fishing operations in order to develop a comprehensive sampling design ... which will provide data in line with assessment procedures that are quite similar to those commonly ... used in the statistical sampling theory. These procedures are, to a certain extent, limited by the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 3–9 : Author(s): Zuleta, A.V. and C.A. Moreno

6. Estimation of natural mortality using catch-at-age and aged mark-recapture data: a multi-cohort simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation.

   process error in predicted catch-at-age numbers. Simulations assumed 1 000 releases per year over 12 years ... perturbation by observational error were also carried out for each model in order to investigate the effect on ... estimates with that for M. In contrast, when sigmoidally shaped selectivity was simulated, and the ... functional form of selectivity was correctly specified in the BODE model, both models gave close to unbiased ... the BODE model requires an extra component to the log-likelihood which defines the process error in ... error were also carried out for each model in order to investigate the effect on estimation of M ... with that for M. In contrast, when sigmoidally shaped selectivity was simulated, and the functional ... form of selectivity was correctly specified in the BODE model, both models gave close to unbiased and ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Author(s): Candy, S.G.

7. Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution

   ‘effective sample size’ (ESS) in integrated assessments is an approximate but simple way of modelling the ... empirical coefficient of variation (CV) in the proportions, with one being based on an existing CV model ... accuracy in the following order: (i) the estimator based on the existing CV model; (ii) that based on the ... method. To account for process error in the calculation of the ESS, the lack of fit of the age-structured ... Email – steve.candy@aad.gov.au Abstract The incorporation of ‘effective sample size’ (ESS) in ... for the empirical coefficient of variation (CV) in the proportions, with one being based on an ... with increasing accuracy in the following order: (i) the estimator based on the existing CV model ... than the best haul-level method. To account for process error in the calculation of the ESS, the lack ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Author(s): Candy, S.G

8. Evaluating the impact of multi-year research catch limits on overfished toothfish populations

   populations Abstract / Description:  In stocks that have been depleted by overfishing, the benefit of ... research catches, this study shows that stocks can take decades to recover even in the absence of fishing ... assessed in this study indicate that, where a stock has been depleted to at or below 20% of the median ... unfished spawning stock biomass, research catches in excess of 0.6% of median unfished total stock biomass ... 2009 (SC-CAMLR, 2009b)) and declining catches by the authorised fleet in the fishery (Divisions ... in 2002 (CCAMLR, 2002). The relationship of the stock on Ob and Lena Banks to other stocks in the ... research fishing, SC-CAMLR has agreed that research should be conducted in such a way that it does not ... impact on the recovery of the stock, while any data collection plan which may in- volve research fishing ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 47–55 : Author(s): Welsford, D.C

9. The choice of procedure for deciding when to close fisheries regulated by CCAMLR: a simulation model

   simulation model Abstract / Description:  The methods, described in CCAMLR Conservation Measures, used for ... implement because of the variation in catch rates shown by the fisheries. Non-fluctuating random and ... decisions is investigated under a variety of circumstances. The model described in the existing conservation ... reporting periods are small (five days) and the reporting delay is minimal. It is recommended that in future ... , described in CCAMLR Conservation Measures, used for deciding the closure date for fisheries monitored by ... the Secretariat of CCAMLR, have been difficult to implement because of the variation in catch rates ... circumstances. The model described in the existing conservation measures is shown to have a high probability ... days) and the reporting delay is minimal. It is recommended that in future conservation measures ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 81–97 : Author(s): Agnew, D.J.

10. On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)

    Champsocephalus gunnari in the South Georgia area was assessed using six different methods. Data on size ... composition of catches from 1964/65 to 1968/69 and the age/length key for the first half of 1972 were used in ... suggested that M =0.56 should be used in stock assessment for C. gunnari in Subarea 48.3. File:  19-Frolkina ... * * Abstract The instantaneous rate of natural mortality (M) of Champsocephalus gunnari in the South Georgia ... 1968/69 and the age/length key for the first half of 1972 were used in the calculations. The results ... used in stock assessment for C. gunnari in Subarea 48.3. Resume Le taux instantane de mortalite ... , Beverton and Holt and several other methods. Therefore in 1989 the CCAMLR Working Group on Fish Stock ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Author(s): Frolkina, G.A. and R.S. Dorovskikh

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