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

   . 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 ... The annual catch of Antarctic krill (Euphausia superba) in the Scotia Sea (FAO Statistical Subareas ... potential for additional increases in catch. The total precautionary catch limit of 8.6 million tonnes for ... fishing has occurred mainly in Area 48, where about 28% of the Antarctic krill stock is esti- mated to ... . The annual proportions of krill less than 36 mm in length to the total captured in net samples in ...

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

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

   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 ... are developed from the results of four scientific surveys conducted in 1990,1992,1993 and 1997. The ... fishing season would allow for a catch limit on the Heard Plateau of 900 tonnes in the 1997/98 season and ... (Clzampsocephalus gunnari) in CCAMLR Division 58.5.2 based on the results of three Australian surveys (Williams ... estimates of The C. gunnari populations in these two regions have different spawning seasons and, as ...

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

3. Factors that may influence the accuracy of abundance estimates from CCAMLR tag-recapture programs for Dissostichus spp. and best practice for addressing bias

   Paper Title:  Factors that may influence the accuracy of abundance estimates from CCAMLR tag ... Lincoln-Petersen equation, the simplest form of an abundance estimator using tag-recapture data, was used ... programs. The methods that have been used in CCAMLR tag-recapture programs to mitigate such biases, or to ... -recapture data. Due to the complexity of toothfish movements throughout their life cycle, as well as the ... estimates of population size. In the CCAMLR area, tagging programs have existed in some fisheries for ... as a key input into integrated assessments of the D. eleginoides fishery in South Georgia and the ... northern part of Subarea 48.4 (Hillary et al., 2006; SC-CAMLR, 2010), the Dissostichus spp. fisheries in ... Committee emphasised the importance of applying international best prac- tice in tagging programs and tag ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 63–72 : Автор(ы): Welsford, D.C. and P.E. Ziegler

4. 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 ... Paper Title:  Evaluating the impact of multi-year research catch limits on overfished toothfish ... in 2002 (CCAMLR, 2002). The relationship of the stock on Ob and Lena Banks to other stocks in the ... impact on the recovery of the stock, while any data collection plan which may in- volve research fishing ... stock within a 2–3 decade time frame and thus result in a failure to achieve the objectives of Article ... decades to recover even in the absence of fishing, and relatively low levels of research catch can ...

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

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

   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 ... direct assessments of the abundance of fish in the population (SC-CAMLR, 1995). The first of these ... standardised CPUE trends with those trends predicted by the GYM ailalyses, in each of the last three years WG ... GYM The GYM is a generalised version of the krill yield model used in CCAMLR (Constable and de la ... yield that satisfies objectives for the maintenance of the stock spawning biomass in accordance with ...

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

6. Chilean krill fishery: analysis of the 1991 season

   data and its use in studying small-scale spatial distribution of catches. The results show that krill ... Paper Title:  Chilean krill fishery: analysis of the 1991 season Abstract / Description:  This ... paper summarises Chilean catch data for 1991. Special emphasis is given to the analysis of haul-by-haul ... fishing in Subarea 48.1 is particularly intense near CEMP sites. Other ways of using of haul-by-haul data ... -by-haul data and its use in studying small-scale spatial distribution of catches. The results show ... objective of CCAMLR, by definition, is the conservation of the Antarctic marine living resources. KriU is ... second meeting of WG-KriU in 1990 there was some discussion on the use of haul-by-haul data (SC-CAMLR ... for the year 1983, only in the Subarea 48.1, comprising from 5% to 100% of the kriU fishery in that ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Автор(ы): Marín, V.H., A. Mujica and P. Eberhard

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

   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 ... entirely within the shelf area. Depths provided in this paper are the mean of the depths at the start and ... Nova Bay, Ross Island, and in the south of small-scale research unit (SSRU) 881L (adjacent to the Ross ... fisheries data available, there is no evidence for a northward contraction in the range of D. mawsoni over ... the course of the fishery. Nevertheless, it would seem prudent to have a monitoring system in place ...

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

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

   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 ... describing the dis- tribution of VME indicator taxa1 in the Ross Sea region outside the spatial footprint of ... vulnerable communities do occur in small patches spread over large areas relative to the distribution of ... ’ refers to the list of taxonomic groups defined by the Commission in 2009 following the VME Workshop (SC ... communities is higher than in other areas, or that those areas are important to the sustainability of ...

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

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

   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 ... mean and variance of the catch which meets a specified harvest strategy target. In Cell E the model ... data) were identified in an attempt to provide a blueprint for the development of suitable ... to the use of the less objective tools of intuition, experience and rules of thumb in formulating ... Starfield et al (1986) have indicated, part of the reason why modelling has not been used more in the ...

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

10. A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3

    highly skewed, with medians in the three years of 621, 2 852 and 550 birds respectively. 95% confidence ... with IUU fishing. The mean and variance of fish catch rate was calculated for each area and each year ... Paper Title:  A statistical method for estimating the level of IUU fishing: application to CCAMLR ... -documented fisheries protection vessel (FPV) cruise data. The method takes explicit account of both ‘seen ... longliners licensed to fi sh in South Georgia and the South Sandwich Islands have a mean of 355 tonnes (SD ... skewed, with medians in the three years of 621, 2 852 and 550 birds respectively. 95% confi dence limits ... arrests by UK authorities, and the identifi cation of large areas in the Indian Ocean sector where tooth ... levels of IUU activity. Each year CCAMLR has made estimates of the level of IUU catch in Subarea 48.3 ...

    Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Автор(ы): Agnew, D.J. and G.P. Kirkwood

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