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1. Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground

   :  Attempts to estimate natural mortality, as a single constant M, simultaneously with other model parameters ... to 2008. A large proportion of the recaptures of fish released in this fishery were aged and these ... . These are the BODE model (Baranov ODE) and the CCODE model (constant catch ODE). The CCODE model is a ... to the Baranov equations and does not require a catch equation but removes catch-at-age numbers ... The annual natural mortality rate, M, is a very influential parameter in determining the productiv ... - ity of a stock when considered in combination with annual number of recruits, growth rate in body ... (D. mawsoni) in the Ross Sea (Subarea 88.1) (Dunn and Hanchet, 2007) apply a fixed value of M of ... 0.13 y–1 rather than estimate this parameter jointly with other model para meters. The use of a fixed ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Autor(es): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins

2. Optimization of survey sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins

   results of a survey of prey size in Adélie penguins, sampling designs intended for the detection of inter ... recommended and a required sampling protocol is suggested. A table of minimal numbers of penguins to be ... sampled as a function of number of sampling dates and magnitude of the variance component is given, under ... to the variance component of ‘penguin-within-dates’ obtained from a previous study in Bahía Esperanza ... . Marschoff and B. Gonzalez* Abstract Based on the preliminary results of a survey of prey size in Adelie ... each level in nested ANOV A designs. The optimal numbers of penguins and krill to be used in the ... detection of interannual variability in the parameters concerned are recommended and a required sampling ... protocol is suggested. A table of minimal numbers of penguins to be sampled as a function of number of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 551–559 : Autor(es): Marschoff, E. and B. Gonzalez

3. An impact assessment framework for bottom fishing methods in the CAMLR Convention Area

   Area Abstract / Description:  This paper presents a methodological framework to estimate the likely ... illustrates the utility of the standardised approach and provides a methodological template for systematic ... impact assessment in fisheries using bottom impacting methods, to inform mitigation efforts and as a ... necessary component of a full ecological risk assessment. File:  10sharp-et-al.pdf ... Terrace Wellington, New Zealand Abstract This paper presents a methodological framework to estimate the ... fishery. This paper illustrates the utility of the standardised approach and provides a methodological ... mitigation efforts and as a necessary component of a full ecological risk assessment. Résumé Ce document ... sur les organismes benthiques fragiles. Cette méthode a été conçue pour faciliter la normalisation de ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 195–210 : Autor(es): Sharp, B.R., S.J. Parker and N. Smith

4. Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data

   of concentrations of krill (Butterworth, 1988; Mangel, 1988) in a given region of the Southern Ocean ... 1980s. These examples highlight the need for a navigational log as well as a fishing log in order to ... make accurate inferences. In the appendix, a method for correcting for the bias in the detection of ... , 1988) in a given region of the Southern Ocean. Sample computations are performed, using data ... collected by Soviet research/survey vessels in the early 1980s. These examples highlight the need for a ... navigational log as well as a fishing log in order to make accurate inferences. In the appendix, a method for ... (spatial scale 100 m) which then aggregate into concentrations of krill (spatial scale 10 nm) in a large ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 283–322 : Autor(es): Mangel, M.

5. Guidelines for the preparation of hydroacoustic survey reports on krill

   results obtained during echometric surveys of fish and krill, and to establish a data bank of these ... the quantitative assessment of biomass of organisms. The guidelines contain a description of ... a report of a hydroacoustic survey performed as part of FIBEX by the Soviet research vessel Odyssey ... echometric surveys of fish and krill, and to establish a data bank of these surveys. The unification of ... of biomass of organisms. The guidelines contain a description of requirements for the preparation ... of reports of echometic surveys. An example is provided of the preparation of a report of a ... portant sur le polygone VI qu'a effectue, dans le cadre de FIBEX, de janvier a mars 1981 dans la mer du ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 165-193 : Autor(es): Kalikhman, I.L.

6. Some thoughts on precautionary measures for the krill fishery

   :  The concept of precautionary measures for krill is discussed. A precautionary catch limit, based on ... (WG-Krill) is discussed and it is concluded that such a method is appropriate in setting an overall ... refinement to provide a sufficient safeguard for land-based predators. A new approach is described which ... discussed. A precautionary catch limit, based on the potential yield model developed by the CCAMLR ... Scientific Committee's Working Group on Krill (WG-Krill) is discussed and it is concluded that such a ... Statistical Area 48, but the approach requires considerable refinement to provide a sufficient safeguard for ... land-based predators. A new approach is described which takes account of the requirements of land ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Autor(es): Everson, I. and W.K. de la Mare

7. Investigations of required sampling regimes for environmental parameters

   and pressure. Sampling daily maxima and minima would be sufficient to detect a 2 to 3°C change in ... monthly mean temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind ... speed continuously or as daily maxima and minima would be sufficient to detect a 10 to 20% change in ... minima would be sufficient to detect a 2 to 3°C change in monthly mean temperature over two years with a ... significance a of 0.05 and a power P of 0.8. Sampling wind speed continuously or as daily maxima and minima ... would be sufficient to detect a 10 to 20% change in monthly mean log-transformed wind speed a of 0.05 ... l'identification des changements interannuels dans les parametres de l'environnement a ete examinee a l'aide des ...

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

8. Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation

   marine organisms. A stochastic version, the so-called SDWBA model, is endorsed by CCAMLR to predict the ... lengths are explored via a sensitivity analysis of some important parameters: number of stochastic ... variability of krill in the area of investigation. In a multifrequency context, the girth–length relationship ... for the body shape parameterisation can give a high source of uncertainty, and there is an urgent need ... rigorously if the scattering as a function of size and frequency for an individual (i.e. target strength ... . Exact solutions can be achieved with analytical restrictions but at the cost of a limited range of ... ., 2008). In the early 1990s, a theoretical approach based on the distorted­wave Born approximation ... fluid­like marine organisms. A stochastic version, the so­called SDWBA model, is endorsed by CCAMLR to ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Autor(es): Calise, L. and G. Skaret

9. Fish distribution and biomass in the Heard Island zone (Division 58.5.2)

   Island and the McDonald Islands, an Australian Territory around which a 200-mile EEZ has been declared ... distribution, abundance and biology of the most important species, covering a number of years and seasons. Five ... gunnari, but total abundance varied greatly between years. Channichthys rhinoceratus has a similar ... waters shallower than 300 m. From these results, it seems that a small fishery of a few hundred tonnes ... , an Australian Territory around which a 200-mile EEZ has been declared. In order to assess the ... of the most important species, covering a number of years and seasons. Five species were found to be ... varied greatly between years. Channichthys rhinoceratus has a similar distribution, but abundance is ... . From these results, it seems that a small fishery of a few hundred tonnes each for C. gunnari and D ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 1–20 : Autor(es): Williams, R. and W.K. de la Mare

10. Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia

    the given harvest control rule to set a two-year total allowable catch (TAC). One issue is the ... accurate identification of age cohorts from the survey data. In this paper a length-based approach is ... described that removes the problem of cohort determination. A bootstrap technique (consistent with the ... population numbers-at-length. A comparison of this method and the existing age-based CMIX/GYM methodology ... these numbers forward under the given harvest control rule to set a two-year total allowable catch ... (TAC). One issue is the accurate identification of age cohorts from the survey data. In this paper a ... length-based approach is described that removes the problem of cohort determination. A bootstrap ... estimate of the population numbers-at-length. A comparison of this method and the existing age-based CMIX ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Autor(es): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew

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