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1. A potential feedback approach to ecosystem-based management: Model Predictive Control of the Antarctic krill fishery

   is committed to managing the fishery according to conservation principles that articulate the key goals ... Predic- tive Control (MPC) (Figure 2). Recent advances in algorithms and computing resources mean ... (predators) r’1 = 0. 1 r’2 = 0.1 Carrying capacity (harvested species): mean 4 1 10K ... (harvested species): mean 40 10B = standard deviation 0 40.2 10B = ´ Transport ... spatially resolved annual catch limits in response to estimates of the state of the system. It suggests that ... Control of the Antarctic krill fishery Abstract / Description:  CCAMLR aims to develop a feedback approach ... whether a feedback approach is likely to achieve the multiple objectives that EBM implies in the complex ... Control (MPC) to achieve objectives for a harvested species, its predators and the fishery, in a ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 119–137 : Author(s): Hill, S.L. and M. Cannon

2. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

   ~ p e 6 y m ~ p a 3 ~ e n b ~ o r o ynpasneHaa 14x npoMbrcnoM. I I p e a o x p a ~ t ~ ~ e n b ~ b ~ e orpaHmeHm Ha BbInOB, PaCCYMTaHHbIe ... (Pennington, 1983; de la Mare, 1994b) and the sample means with bootstrap variance and confidence intervals ... -density analyses also give estimates of the mean sizes at age. These data have been used to estimate ... the following mean estimates of survivorship: *ge Mean S, Std. Error An approximately unbiased estimator ... conducted in 1990, 1992, 1993 and 1997. The assessments include estimates of all the parameters required ... of 900 tonnes in the 1997/98 season and 600 tonnes in 1998/99. File:  06delamare-etal.pdf ... Paper Title:  An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island ... Abstract / Description:  Assessments of the abundance and potential yield of the mackerel icefish ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Author(s): de la Mare, W.K., R. Williams and A.J. Constable

3. 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

   for by-catch species by on-board scientific observers was noted, limiting meaningful analysis of patterns ... for by-catch species by on-board scientific observers was noted, limiting meaningful analysis of patterns ... for by-catch species by on-board scientific observers was noted, limiting meaningful analysis of patterns ... conservation measures limiting entry to vessels, avoiding by-catch by having vessels move when by-catch ... mean with the standard error of the bootstrap distribution. Standardising CPUE data to account ... despite CCAMLR Conservation Measure 41-07 that, while limiting the number of vessels individual Flag ...

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

4. Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill

   and 2.62 to 2.65). In the base runs, the mean proportion of the stock as recruits was set at 0.557 ... proportions from 0.126 to 0.164 while keep- ing the mean at 0.557, assuming annual catches equal ... each standardised to have a mean of 1 and then supplied to the GYM as the vector of recruitments ... sampling leg in each area. Values shown are before standardisation to have mean 1. n/a indicates ... . The annual proportions of krill less than 36 mm in length to the total captured in net samples in four ... the annual size distributions of krill in penguin diets. Simulations with either no fishing, or with ... proportional recruitment of krill. In this study, krill sampling data for empirical size frequencies were ... supplied to the GYM as the ‘vector of recruitments’ input option to simulate the population dynamics of ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Author(s): Kinzey, D., G. Watters and C.S. Reiss

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

   from a lognormal distribution with a CV of 0.6 and mean recruitment set to achieve a median status ... structure Age structure Random recruitments Biomass 5 000 tonnes Recruitment Mean R0 136 000 CV ... of lognormal 0.6 Percentage of SSB0 after which recruitment declines 0.2 Natural mortality Mean annual ... was also investigated, with a ‘strong’ S-R relation- ship where mean recruitment declined when SSB ... 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 ... Paper Title:  Evaluating the impact of multi-year research catch limits on overfished toothfish ...

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

6. Integration of CPUE data into assessments using the Generalised Yield Model

   ~ p e 6 y e ~ BHeCeHMR TOJlbKO He7HaYMTeJIbHblX I . I ~ M ~ H ~ H M ~ ~ B K0MIIbK)TePHYK) nporpaMMy, BbIn ... region. This time series could provide a means of deter- mining which of the replicate trials ... The GYM assumes that the historical recruit- ments are independently lognormally distributed, with means ... differences there are imply that the mean spawning stock depletion is slightly higher under importance ... the use of importance sampling, for incorporating information on trends in standardised CPUEs into GYM ... Paper Title:  Integration of CPUE data into assessments using the Generalised Yield Model Abstract ... accorded high priority to the development of methods of integrating different indicators of stock status ... into assessments using the Generalised Yield Model (GYM). In this paper, we propose a method, based on ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Author(s): Kirkwood, G.P. and A.J. Constable

7. Modelling and decision making as part of the CCAMLR management regime

   in Article 11 of the Convention stress the need to conserve the ecosystem - 299 - as a whole (Edwards ... is structured. The characterisation of such a model by means of its attributes is best illustrated by way ... and population parameters of the krill resource in order to calculate the mean and variance of the catch ... -282. Edwards, D.M. and Heap, J.A. 1981. Convention on the Conservation of Antarctic Marine Living ... Paper Title:  Modelling and decision making as part of the CCAMLR management regime Abstract ... environment essential for the effective management of the Antarctic marine ecosystem within the requirements ... horizons, time steps, constraints and data) were identified in an attempt to provide a blueprint for the ... development of suitable simulations of important Antarctic marine ecosystem interactions and to facilitate the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 295-322 : Author(s): Miller, D.G.M.

8. Can toothfish catches be used to predict the presence of vulnerable benthic invertebrate taxa?

   (in litres or kg) of VME indicator taxa for each segment2 of longline fished as part of Conservation ... ______________________________________________________________________ 2 A longline segment means a 1 000-hook section of line or a 1 200 m section of line, whichever is the shorter ... , and for pot lines a 1 200 m section (Conservation Measure 22-07 in CCAMLR, 2009b). Typically, several segments ... of Conservation Measures in Force, 2009/10. CCAMLR, Hobart, Australia: 223 pp. Etnoyer, P. and J. Warrenchuk ... data available showed no evidence that the presence of any of six VME indicator taxa was informative in ... Paper Title:  Can toothfish catches be used to predict the presence of vulnerable benthic ... invertebrate taxa? Abstract / Description:  Accurate estimation of the impact of bottom fishing on vulnerable ... marine ecosystems (VMEs) requires knowledge of the distribution of those communities relative to the ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 87–96 : Author(s): Parker, S.J. and M.H. Smith

9. Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf

   within the shelf area. Depths provided in this paper are the mean of the depths at the start and end ... ) Catch (tonnes) Mean CV Terra Nova Bay 2005 2 9 0.0 0.00 2.87 2006 2 88 337.4 3.83 0.57 2007 ... that smaller fish (<100 cm) moved the larg- est mean distance between release and recapture. It therefore ... was prohibited in depths shallower than 550 m in order to protect benthic communities (Conservation Measure 41 ... Terra Nova Bay, Ross Island, and in the south of small-scale research unit (SSRU) 881L (adjacent to the ... available, there is no evidence for a northward contraction in the range of D. mawsoni over the course of ... the Ross Sea shelf Abstract / Description:  This paper summarises knowledge of the distribution and ... relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf (defined here as the ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 33–51 : Author(s): Hanchet, S.M., S. Mormede and A. Dunn

10. Analysis of haul data from the South Georgia krill fishery

    , BbInOnHeHHbIM TpaynepaMH, ocyqecTsnaBmmm npoMbrcen KpHnrr B pafio~e K ) x ~ o f i l -eopr~u 3a nepr?on 1994 ... the only means by which sufficient information could be derived for the preparation of any reliable ... ) and third (Q3) quartiles were equidistant about the median, with the median very close to the mean number ... previously stopped (n = 109, mean distance = 25.8 km; standard deviation = 45.7; median distance = 7.4 km ... focused, operating in a limited area along the shelf edge on the northern coast of the island. Each day ... abundance indices that are sensitive to changes in biomass. The focused nature of the fishery at South ... Paper Title:  Analysis of haul data from the South Georgia krill fishery Abstract / Description ... :  Data from individual hauls carried out by vessels operating in the South Georgia krill fishery between ...

    Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Author(s): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes

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