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1. Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea

   ages at maturity of 6–7 years for males and 8–11 years for females. These estimates are near the middle ... to upper end of the range of ages at maturity for skates worldwide. The results of this study are ... Paper Title:  Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea Abstract ... / Description:  X-rays of vertebral half-centra, and x-rays and transmitted white light examination of caudal ... maturity for males and females (64 and 66–69 cm PL respectively) produced estimated ages at maturity of 6 ... the range of ages at maturity for skates worldwide. The results of this study are preliminary and ... -rays were taken of half-centra with a Phillips 45 kV X-ray machine at 5 mA. Caudal thorns were ... toothfi sh (Dissostichus mawsoni) stomach and preserved at the Museum of New Zealand (NMNZ P37792) were ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Autor(es): Francis, M.P. and C. Ó Maolagáin

2. On the presence of Paralomis spinosissima and Paralomis formosa in catches taken during the Spanish survey Antártida 8611

   seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at South Georgia. P ... Orkney, Elephant Island and South Shetland), at least in the depth range surveyed. The location of the ... Paper Title:  On the presence of Paralomis spinosissima and Paralomis formosa in catches taken ... the archipelagos in the Scotia Sea. A total of 345 hauls was conducted, of which 29 took place around ... . spinosissima was caught in seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at ... hauls conducted to the south and east of South Georgia, at depths ranging between 199 and 450 m; in ... south of Shag Rocks (Figure 1). At South Georgia (Figure 2), the species was found in hauls carried ... depths of 160 to 627 m, whereas P. formosa was taken at depths of 350 and 320 m, at stations 44 and 178 ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 165–173 : Autor(es): López Abellán, L.J. and E. Balguerías

3. Patterns and processes in the distribution and dynamics of Antarctic krill

   distribution and dynamics of Antarctic krill population at various spatial and temporal scales. We suggest that ... distribution patterns at various scales of observation to ascertain the plausibility of the model and identify ... Paper Title:  Patterns and processes in the distribution and dynamics of Antarctic krill Abstract ... / Description:  A general framework is presented to develop, test and integrate component models of the ... Antarctic krill population at various spatial and temporal scales. We suggest that models of increasing ... should then be compared to statistical descriptions of the observed distribution patterns at various ... physical models of turbulent redistribution are not sufficient to explain krill distribution at small ... physical factors as providing an adequate explanation of the fluorescence spectrum at least on ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 281–299 : Autor(es): Levin, S.A., A. Morin and T.M. Powell

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

   decision criteria for at least two of the four recruitment vectors based on net sampling, regardless of how ... Paper Title:  Effects of recruitment variability and natural mortality on generalised yield model ... natural mortality rate of 0.8 and recruitment variability generated using a Beta distribution for ... proportional recruitment of krill. In this study, krill sampling data for empirical size frequencies were ... while meeting CCAMLR decision criteria for at least two of the four recruitment vectors based on net ... been fixed at its present level since 1991. With the current estimate of pre-exploitation biomass of ... ) achieve a median spawning biomass of at least 0.75 of the unfished median spawning biomass over a twenty ... models supplied with pre-specified input param- eters (see below). The highest value of gamma at which ...

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

5. Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   Paper Title:  Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from ... the Ross Sea Abstract / Description:  Juveniles of the macrourid Macrourus whitsoni were collected by ... the NIWA research vessel Tangaroa during the BioRoss survey of the western Ross Sea and Balleny ... Islands in 2004. Intensive analysis of otoliths from these specimens greatly increased confidence in the ... 0.055 and t0 0.159 for females. Revised estimates of the mean total length-at- maturity (38.8 and 46.4 ... compares these results with those from the earlier studies. Revised estimates of age-at-maturity are also ... - and age-at-maturity A large dataset of observer-collected maturity observations from 1999 was used ... for each sex. The model’s slope was regressed through the origin. L50%x, the length at which 50% of ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Autor(es): Marriott, P.M., M.J. Manning and P.L. Horn

6. Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited

   already heavily fished at the beginning of the 1970s. The closure of the fishery for this species in 1985 ... are more or less evenly distributed over the area at the time of the survey. This assumption is ... Paper Title:  Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey ... was one of the first conservation measures adopted by CCAMLR. Fish biomass within a CCAMLR subarea or ... species in Southern Ocean fi sheries. The species was already heavily fi shed at the beginning of the ... surveys that target a number of species, including N. rossii, at the same time. These surveys are ... area at the time of the survey. This assumption is violated in the case of N. rossii, which is non ... -species surveys has indicated a substantial recovery of N. rossii, either at South Georgia or off ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Autor(es): Kock, K.-H., M. Belchier and C.D. Jones

7. Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf

   of fish feeding activity was also observed at night. Fishing during this period with bottom trawls ... had yielded almost no catches at all. The information obtained on vertical migrations of C. gunnari ... Paper Title:  Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South ... Georgia shelf Abstract / Description:  High values of coefficient of variation resulting from the ... trawling depth for mid water trawls was measured at the level of the trawl head-rope. Information from ... catches decreases abruptly from 13-14 to 2-8 tonnes per hour of fishing. At night, catches were usually ... 2.0 to 2.6 tonnes per hour of fishing. At sunrise, fish migrate to the bottom layers and catches ... again start to increase. The pattern of catch distribution for bottom trawls at various times of the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Autor(es): Frolkina, J.A. and V.I. Shlibanov

8. Target strengths of Antarctic krill (Euphausia superba)

   Mean Volume Backscattering Strength of encaged aggregations of swimming krill have been measured at 38 ... Paper Title:  Target strengths of Antarctic krill (Euphausia superba) Abstract / Description:  The ... and 120 kHz in a sheltered bay at South Georgia. The results indicate that the Target Strength values ... Backscattering Strength of encaged aggregations of swimming krill have been measured at 38 and 120 kHz in a ... encaged, otherwise free-swimming aggregations of krill at 38 and 120 kHz. In anticipation of submitting a ... harbour of the abandoned, and sadly vandalized, whaling station at Stromness on the island of South ... stored on a BAS data logger at the end of each interval. 4.3 Calibration On-axis calibration with ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Autor(es): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote

9. Detection and quantitative estimation of krill concentrations by hydroacoustic instruments

   capable of registering individual krill at a depth of 50–60 m while the vessel is in motion. According to ... theoretical calculations, the range of detection of individual specimens can be considerably increased at the ... Paper Title:  Detection and quantitative estimation of krill concentrations by hydroacoustic ... instruments Abstract / Description:  The limited capabilities of existing hydroacoustic instruments in ... individual krill at a depth of 50 - 60 m while the vessel is in motion. According to theoretical ... calculations, the range of detection of individual specimens can be considerably increased at the expense of ... spread over several miles and can be registered as one or a number of layers at different depths ... . At certain times of the year, krill aggregations stay close to the surface during daylight hours ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Autor(es): Yudanov, K.I.

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

    Control of the Antarctic krill fishery Abstract / Description:  CCAMLR aims to develop a feedback approach ... to aid ecosystem-based management (EBM) of Antarctic krill fisheries. It is important to assess ... and uncertain conditions typical of Antarctic marine ecosystems. This study used Model Predictive ... spatially resolved annual catch limits in response to estimates of the state of the system. It suggests that ... system when supplied with a sequence of annual area‐specific catches. At each time-step, the ... of population collapse in any one area remains at a plausible level, which is necessarily non-zero ... study therefore uses the following illustrative objectives: (i) with a probability of at least 90 ... - exploitation levels, (ii) with a probability of at least 90%, the area- specific biomasses of predators must ...

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

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