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1. Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey

   ), as a function of the fraction of the biomass estimate which is set as the catch for a 20-year period ... a summer harvest. However, the imposition of an upper bound of 1.5 yr-1 on the effective annual ... et al. (1992) put forward an extension of the harvesting model of Beddington and Cooke (1983) to ... Meetings of the Working Group on Krill (WG-Krill). The most important of these extensions is integration ... any year, an upper bound of 1.5 yr-l is placed on the effective annual fishing mortality for fully ... biomass estimate which is set as the catch for a 20-year period. Three possible fishing seasons are ... drawn at random from pre-specified distributions for each simulation of a 20-year period of harvesting ... ) requested that statistics be provided for a 10- as well as a 20-year period of harvesting. Calculations ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Autor(es): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew

2. A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data

   , and tagging has been an ongoing requirement for all vessels fishing in the fishery since 2004 ... . Although tagging experiments are commonly used for assessing fish stocks, most rely on estimates of ... Sea Region incorporating multi-year mark-recapture data Abstract / Description:  An exploratory ... model was developed for Antarctic toothfish in the Ross Sea region that incorporates multi-year release ... years. This was based on work by Hanchet et al. (2008), who hypothesised an ontogenetic move- ment of ... . Mangel and A.D. MacCall. 2006. A prior for steepness in stock-recruitment relationships, based on an ... . _______________________________________________________________ 1 The CCAMLR fishing season starts on 1 December and ends on 30 November in the following year ... the catches calculated for each year between 1999 and 2012 for Antarctic tooth- fish on the shelf ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Autor(es): Mormede, S., A. Dunn and S.M. Hanchet

3. Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3

   surveys around South Georgia, Subarea 48.3 Abstract / Description:  Methods for calculating the horizontal ... used during the 1993/94 UK fish stock assessment survey around South Georgia on the MV Cordella are ... presented. Regression equations for the estimation of horizontal opening from other, more easily measured ... variables, such as tow speed and trawl depth, are proposed. Biomass estimates for the major fish species ... , biomass, finfish, CCAMLR INTRODUCTION Surveys using bottom trawls have been used for over 20 years to ... be used to estimate the horizontal opening based on an assumed linear relationship between the two ... of Trawl Geometry For a distance travelled over the ground g and an estimated horizontal opening h ... (17, 20 and 21) were logged every 30 seconds and the fourth (22) every 20 seconds. The hydrophone ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Autor(es): Pilling, G. and G. Parkes

4. Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)

   , 2.5 and 3.5 years were estimated to be 14, 28, 37 and 46 cm total length (TL) respectively. These ... fish younger than 3.5 years. Counting translucent zones in the otoliths of D. mawsoni appears to be a ... valid method for determining the age of this species. In addition, sagittal otoliths were examined from ... D. mawsoni that had been injected with oxytetracycline some years before recapture. The six ... unknown. An examination for daily growth zones was unable to provide any information on the likely time ... is from 0.6 to 4.0 cm yr-1 for fi sh aged from 15 to 30 years. It is interesting that all the ... . 0 20 40 60 80 100 120 140 160 180 0 5 10 15 20 25 30 Age (years) To ta l l en gt h ... curve for D. mawsoni, based on otolith zone counts from 46 fi sh caught in McMurdo Sound, had ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 125–138 : Autor(es): Horn, P.L., C.P. Sutton and A.L. DeVries

5. Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects

   . Further, the inclusion of an area stratum by fishing year interaction as an additional random effect in ... standard method for modelling catch and effort data for Patagonian toothfish (Dissostichus eleginoides) for ... together with ‘baseline’ parameter estimates, their variance–covariance matrix, and the inverse-link ... function. An alternative GLM with a more rigorous theoretical basis is introduced here. Catch is modelled ... and an anonymous referee for their helpful comments on the manuscript. References Brandão, A., D.S ... 20 30 40 50 -0 .6 -0 .4 -0 .2 0. 0 0. 2 0. 4 0. 6 Ship index R an do n ef fe ct e st ... log-linear any chosen ref- erence level for an additive factor included in η’ other than YEAR simply ... early years of the fi shery and the effect this can have on ‘treatment’ (i.e. YEAR) fi xed-effect ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Autor(es): Candy, S.G

6. Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers

   with mitochondrial and intron DNA markers Abstract / Description:  Two molecular methods, mitochondrial ... , 1984; Williams et al., 1994), but DNA analyses showed evidence for two genetic units, one around ... air dried and resuspended in 40 µl sterile water and stored at –20°C. Two classes of markers, mtDNA ... performed in 20 μl volumes for a minimum of 4 h, following the manufacturer’s recommendations (New England ... Sequencing Kit according to the manufacturer’s directions (Applied Biosystems Inc., USA) and run on an ABI ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Autor(es): Smith, P.J. and P.M. Gaffney

7. Quantifying movement behaviour of vessels in the Antarctic krill fishery

   analyses demonstrate the need for high-quality year-round data on all vessels participating in the krill ... / Description:  Ten years of recent fine-scale haul-by-haul krill data were used to characterise the behaviour ... /haul, and the travel distance decreased as the catch level increased; this pattern was most obvious for ... number of fishing grounds within this area. The same patterns were observed for vessels from other ... krill fishery is essential for an ecosystem-based approach to managing the effects of fishing on ... late 1980s are proposed based on the results from this study. These analyses demonstrate the need for ... markedly over the last 20 years (Kawaguchi and Nicol, 2007). Models of the interactions between the ... of each haul, assuming 60 n miles for one degree latitude and 30 n miles for one degree longi- tude ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 131–148 : Autor(es): Kawaguchi, S. and S.G. Candy

8. Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys

   , foraging ranges and population sizes from the literature are used to show that for some years catches ... South Orkneys Abstract / Description:  A set of concentric zones of 20 km width was defined around ... . Krill catches in these zones are shown to have a consistent pattern in Subarea 48.1 but an unpredictable ... in all years 1988 to 1991. In 1987, 1988 and 1991, 75% of the catch in Subarea 48.2 between December ... for Subareas 48.1 and 48.2. 100 90 80 .c. 70 J:! tfJ 0 () 50 -0 40 a-e 30 20 10 ... was similar for each of the years examined whereas that for Subarea 48.2 changed each year (Figures 3 ... the literature are used to show that for some years catches within 100 km of predator colonies ... should not have detrimental effects on species that depend on krill for their primary food source ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 287–303 : Autor(es): Agnew, D.J.

9. Foraging behaviour and reproductive success in chinstrap penguins: the effects of transmitter attachment

   method with which to monitor foraging trip duration in penguins by the CCAMLR (Commission for the ... on: (i) the effects of radio transmitter attachment on nest attendance, foraging trip duration, nest ... December 1990 to January 1991 in a discrete chinstrap penguin colony composed of 666 nests on Seal Island ... , South Shetland Islands. In total, one member of each pair at 20 nests and both members of each pair at ... 666 nests on Seal Island, South Shetland Islands. In total, one member of each pair at 20 nests and ... 20 000 pairs of chins trap penguins nest on Seal Island, South Shetland Islands, Antarctica (600 ... instrumented failed before the first nest check on 30 December (the instrumented birds could not be located ... visually, although one was regularly detected on the radio-telemetry data logger). A test for whether the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 291–303 : Autor(es): Croll, D.A., J.L. Bengtson, P.L. Boveng, M.E. Goebel and J.K. Jansen

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

    horizons, time steps, constraints and data) were identified in an attempt to provide a blueprint for the ... environment essential for the effective management of the Antarctic marine ecosystem within the requirements ... of CCAMLR Article II. Eight attributes (purpose, description, variables, driving forces, time ... formulation of a suitable decision-making protocol for management purposes. File:  16-Miller.pdf ... fishing. 5 years. 1 year unless there is a seasonal influence ·on the population. Data limited ... biomass. Prey biomasses and harvesting. 5 years. 1 year unless there is a seasonal influence on the ... data) were identified in an attempt to provide a blueprint for the development of suitable ... management recommendations on renewable resources. The potential for over-dependence on such less objective ...

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

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