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1. Depth distribution and spawning pattern of Dissostichus eleginoides at South Georgia

   with an approximately linear relationship existing between depth and fish length. A statistically ... both up and down slope at particular times of year. Months with a high mean length at depth are May and ... August, and with a low mean length at depth- April and July. Examination of maturity data suggests that ... in addition to a major spawning event in late July/August, there may be a small spawning event in ... , A. Watson, K. Berkieta and J. Pearce Marine Resources Assessment Group Ltd 47 Prince's Gate ... length. A statistically significant pattern of changing mean length at depth with month was detected ... , suggesting movement of animals both up and down slope at particular times of year. Months with a high mean ... length at depth are May and August, and with a low mean length at depth - April and July. Examination of ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 19–36 : Author(s): Agnew, D.J., L. Heaps, C. Jones, A. Watson, K. Berkieta and J. Pearce

2. Distribution, morphology and ecology of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) in the Ross Sea region

   identification of a new species of Southern Ocean grenadier, Macrourus caml, which had hitherto been identified ... CCAMLR Subareas 88.1 and 88.2. There was a small but significant increase in the proportion of M ... . caml). Macrourus caml grows slower, reaches a larger size, lives longer and is heavier for a given ... but at a similar age (50% sexual maturity at 16 y). Gonad staging suggests extended spawning periods ... (CCAMLR Subareas 88.1 and 88.2) began in 1997 and is managed by CCAMLR with a spe- cific requirement to ... , Family Macrouridae) are the main by-catch in the toothfish fishery in the Ross Sea region, with a catch ... ). Grenadiers are also a major prey species of Antarctic toothfish in the region (Fenaughty et al., 2003 ... predators of medium- sized demersal fishes (dominated by grenadiers), implying a potential for fishery ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 37–61 : Author(s): Pinkerton, M.H., P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown

3. 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 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins

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 : Author(s): Mangel, M.

5. Fish stock assessment survey in Subarea 48.3

   Paper Title:  Fish stock assessment survey in Subarea 48.3 Abstract / Description:  A demersal ... important commercial species in the area, Champsocephalus gunnari, is shown to have undergone a major ... decline by comparison with results from the 1989/90 season. Other species do not show a similar dramatic ... that this decline may be due to either a massed migration or high mortality. File:  03-Everson-et ... Abstract A demersal fish survey in the vicinity of South Georgia, CCAMLR Subarea 48.3, is described ... have undergone a major decline by comparison with results from the 1989/90 season. Other species do ... not show a similar dramatic reduction. No commercial fishing on Champsocephalus gunnari has been ... reported from the area. It is suggested that this decline may be due to either a massed migration or high ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Author(s): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski

6. 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 : Author(s): Kalikhman, I.L.

7. Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles

   , where they are a new tool used in ecological research and monitoring. In this preliminary study ... electric UAVs. During the overflight by a UAV powered by piston engine, symptoms of vigilance were observed ... with penguins looking up and around for a few seconds when the UAV was overhead. Similar symptoms of ... or piston engine UAVs. Plans for a systematic monitoring of UAV impact on wildlife, as well as ... aerial vehicles M. Korczak-Abshire and A. Kidawa Institute of Biochemistry and Biophysics Polish ... – akidawa@arctowski.pl A. Zmarz University of Warsaw, Faculty of Geography and Regional Studies ... Biology Pawinskiego 5a, 02-106 Warsaw Poland A. Znój Institute of Biochemistry and Biophysics Polish ... , knowledge about their potential impact on wildlife is scant, especially in Antarctica, where they are a new ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Author(s): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój

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 : Author(s): 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 : Author(s): Williams, R. and W.K. de la Mare

10. 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 : Author(s): Everson, I. and W.K. de la Mare

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