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1. Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region

   State as well as an international CCAMLR observer (Conservation Measure 24-01, paragraph 3(c), see ... ) defined as ( )100ˆ%bias θ θ θ = - and the relative root mean squared error (%RMSE) defined as ( )2ˆ ... , which is likely biased low (see below). This pattern is also reflected in the mean weight of fish per ... of the entire population, for the three operating models. Also shown is the mean weight per individual fish ... Paper Title:  Spatially explicit population dynamics models for Antarctic toothfish in the Ross ... dynamics of spatial heterogeneity of the population along with age structure, movement and reproductive ... models were developed for the Antarctic toothfish (Dissostichus mawsoni) population in the Ross Sea ... region and used as operating models to evaluate the performance of single-area assessments. The models ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Author(s): Mormede, S., A. Dunn, S. Hanchet and S. Parker

2. Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996

   of approximately 4 knots. Mean horizontal openings between the wingtips were 22 m and 23.5 m and mean vertical ... these, the distance travelled by the net over the bottom was calculated. Mean mouth opening of the net multiplied ... efficiency of 100% (i.e. c = 1) has therefore been adopted as a conservative approach. More details on each ... decline in biomass between the last two surveys in 1987 and 1996. Mackerel icefish (C. gunnari) Mean ... from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years of ... the fishery. Results of bottom trawl surveys conducted by Germany in the vicinity of Elephant Island ... in the 1980s showed that stocks of Champsocephalus gunnari, Notothenia rossii, Gobionotothen ... closure of the area in November/December 1996 suggested that the biomass of the standing stock of finfish ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Author(s): Kock, K.-H

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

   Introduction Background In 2007 CCAMLR adopted Conservation Measure 22-06 requiring Member countries ... scenario, frequency, impact) approach provides a systematic means of estimating total impact arising from ... to inform mean- ingful evaluation of the ecological consequences of those impacts, impact assessments ... implemented as a putative list for monitoring in Conservation Measure 22-07 (CCAMLR, 2007). Different groups ... Paper Title:  An impact assessment framework for bottom fishing methods in the CAMLR Convention ... preliminary assessment of bottom fishing impacts for the 2008/09 toothfish longline fishery. This paper ... illustrates the utility of the standardised approach and provides a methodological template for systematic ... Area Abstract / Description:  This paper presents a methodological framework to estimate the likely ...

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

4. Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish

   . The ratio-of-means (Brad- ford, 2002) hook loss rate ( hiL ), with units hooks lost per hook set ... L u s= ´ ´ (3) where hijs was the mean hook spacing in km dur- ing season h in SSRU i for vessel j and hiju ... was the mean number of hooks set during season h in SSRU i for vessel j. Total hook loss and associated length ... ), with units tonnes per hook, during season h in SSRU i for vessel j was calculated using the ratio-of-means ... counted in estimates of total fishing removals or otherwise accounted for in stock assessment models. The ... mortality resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea ... Paper Title:  Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea ... average 208 tonnes of Antarctic toothfish mortality may be unaccounted for annually. While the current ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Author(s): Webber, D.N. and S.J. Parker

5. Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia

   have neither been published nor made available to the Commission for the Conservation of Antarctic ... is not given, it is possible that the value of 0.48 was the mean value for 1964/65 in Frolkina and Dorovskikh ... by Frolkina and Dorovskikh (1991) indicated several errors present in the published paper. The mean ... of the four values given in their table for the 1964/65 season is 0.4075 and not 0.475, and the mean ... careful consideration of the data and available methods, several errors are noted in earlier estimates ... Paper Title:  Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around ... South Georgia Abstract / Description:  Information on natural mortality rates of the mackerel icefish ... . Unfortunately, because none of the datasets are sufficiently comprehensive, it is impossible to unequivocally ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Author(s): Everson, I

6. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

   npe.llJIO:>KeHH.S:I. O~eHKa COCTO.S:lHH.S:I 3anaca MO:>KeT 6bITb BbInOJIHeHa nOcpe.llCTBOM BbIqHCJIeHH.S:I ... K .z:.onYIqeHHSIM, c.z:.eJlaHHblM B pa6oqei:t Mo.z:.eJlH, 6blJla BbInOJlHeHa .z:.JlSI Toro, qTo6bl ... , the non-linearity in the cPUE-biomass relationship means that catches would be reduced by a smaller ... to allow estimation of the fraction of the mean unexploited biomass level at which MSY (in an average ... (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status ... 0.75 CPUE ref. An operating model of krill dynamics in the region is developed for simulation testing ... Paper Title:  Towards an initial operational management procedure for the krill fishery in ... , and an algorithm for specifying the levels of regulatory mechanisms (e.g., a catch control law) that ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Author(s): Butterworth, D.S.

7. Cephalopod research in the Antarctic

   become very large. It is therefore important that the Commission for the Conservation of Antarctic ... with protein synthesis rate. The RNA/DNA ratio may thus provide a means of assessing rate of metabolic ... will be essential if cephalopod stocks are to be managed with due consideration for the conservation of those ... on a meaningful effort index, are clearly of prime importance for making stock estimates. However, given ... policy for management of Antarctic cephalopods. In view of the rapidity that cephalopod fisheries can ... Paper Title:  Cephalopod research in the Antarctic Abstract / Description:  Cephalopods are a ... major component of the Antarctic marine food web and it seems inevitable that they will be the subject ... of future commercial exploitation. Research is being carried out at BAS on the species composition ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 323-334 : Author(s): Rodhouse, P.G.

8. Identifying taxonomic groups vulnerable to bottom longline fishing gear in the Ross Sea region

   in Conservation Measure (CM) 22-06 (CCAMLR, 2009). Further, FAO has proposed several specific categories ... a management action. The key concepts underpin- ning VME ecological value and conservation were described ... Conservation Organisations (RCOs) (e.g. CCAMLR) and States to develop. These include specifying which taxa ... and potentially spreading impact from an area with little conservation value to an area of higher con- servation ... vulnerable marine ecosystems (VMEs) requires a specific list of the taxa that are considered vulnerable in ... the fishery being assessed. New Zealand identified an interim list of taxa to monitor in fishery by ... -catch in the Ross Sea as part of its benthic fisheries impact assessment. The rationale for including or ... Paper Title:  Identifying taxonomic groups vulnerable to bottom longline fishing gear in the Ross ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 105–127 : Author(s): Parker, S.J. and D.A. Bowden

9. Environment–krill relations in the South Georgia marine ecosystem

   and this was used to calculate monthly mean values. Monthly CPUE indices were then calculated as a weighted ... . Monthly mean atmospheric pressure gradients were estimated for the area around South Georgia. The values ... meteorological charts were averaged for each month. These monthly mean values are referred to as the air ... which the zonal and meridional air transport indices were calculated. 1 - mean position of the Weddell ... study, time series of krill abundance (CPUE) indices were derived from Soviet fishing operations in the ... were only expressed strongly in years of extreme conditions. The correlation with water temperature was ... Paper Title:  Environment–krill relations in the South Georgia marine ecosystem Abstract ... / Description:  Interannual variability in the Southern Ocean ecosystem has long been noted and physical factors ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Author(s): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky

10. Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic

    in length from 44 to 59 m (mean = 53 m), with a GRT of between 532 and 951 tonnes (mean = 695 tonnes ... whales (Purves, 2001). This is likely to be a conservative estimate as some fi sh are probably ripped ... most abundant marine mammal observed in the vicinity of vessels when lines were being hauled, being ... no cetaceans were present. Catch rates were slightly higher in the presence of sperm whales and it is ... of unrecorded fish removals on stock assessment models, modifications in the behaviour of marine ... with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic Abstract ...

    Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Author(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins

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