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1. Management and uncertainty: the example of South Georgia

   :  Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... to consider ways in which CCAMLR can improve its ability to take decisions in the face of uncertainty ... uncertainty. The question is addressed specifically in terms of the fishery of Notothenia rossii around South ... often made with some degree of uncertainty in scientific advice. Such uncertainty is unlikely to be ... avoided even though further research should reduce its degree. It seems useful to consider ways in ... which CCAMLR can improve its ability to take decisions in the face of uncertainty. From an ... with uncertainty. The question is addressed specifically in terms of the fishery of Notothenia ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Автор(ы): Gulland, J.A.

2. Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen

   off Kerguelen in 1999 were estimated by reading transverse-sectioned otoliths. Randomly interspersed ... showed discrepancies due to gear-specific catchability, or differences in the available population with ... depth or season. Age–length keys were constructed for use in assessing toothfish catches made by ... mortality Z was estimated to be between 0.09 and 0.12. Significant differences in age-at-length data between ... trend in abundance (Chapman and Robson, 1960; Barbieri et al., 1994). To estimate growth, data from ... (Dissostichus eleginoides) caught off Kerguelen in 1999 were estimated by reading transverse-sectioned otoliths ... in the available population with depth or season. Age–length keys were constructed for use in ... differences in age-at-length data between sexes were found, estimating von Bertalanffy parameters for males ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 29–41 : Автор(ы): Ashford, J., G. Duhamel, C. Jones and S. Bobko

3. Analysis of albatross and petrel distribution within the CCAMLR Convention Area: results from the Global Procellariiform Tracking Database

   successful measures to reduce the incidental mortality of seabirds in most of the fisheries within its ... and petrels in the CCAMLR Convention Area to inform the CCAMLR risk-assessment process. Albatross and ... petrel distribution is analysed in terms of its division into FAO areas, subareas, divisions and ... including areas managed by CCSBT, ICCAT, IOTC and WCPFC. Priority gaps in current tracking data are ... the incidental mortality of seabirds in most of the fisheries within its jurisdiction, and has done ... ) fishing. This paper presents an analysis of the distribution of albatrosses and petrels in the CCAMLR ... in terms of its division into FAO areas, subareas, divisions and subdivisions, based on remote ... CCSBT, ICCAT, IOTC and WCPFC. Priority gaps in current tracking data are identified, especially ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 143–174 : Автор(ы): BirdLife International (prepared by C. Small and F. Taylor)

4. Krill population biology during the 1991 Chilean Antarctic krill fishery

   / Description:  Population biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 ... 419 hauls. In Area A, a unimodal size frequency distribution was found; the size range was between 30 ... spermatophore had a 36.5 mm TL, 80% of the females with spermatophores had a TL larger than 45 mm. In Area B, a ... in night-time catches while females are more abundant during daytime catches, thus showing a ... biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 during krill ... of 419 hauls. In Area A, a unimodal size frequency distribution was found; the size range was ... larger than 45 mm. In Area B, a bimodal size frequency distribution and a larger size range were found ... composition is considered, males are more abundant in night-time catches while females are more abundant ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Автор(ы): Mujica R., A., E. Acuña S. and A. Rivera O.

5. Southern elephant seals and CCAMLR

   southern elephant seal (Mirounga leonina) in the Kerguelen province of the Southern Ocean. Sub-populations ... possible causes of the elephant seal’s decline in the region. Such explanations assume that a communal ... pelagic phase is extremely important. Recent South African research in this field has been initiated and ... it is hoped that this will help to elucidate the reasons for the observed decline of M. leonina  in ... seal (Mirounga leonina) in the Kerguelen province of the Southern Ocean. Sub-populations of this ... causes of the elephant seal's decline in the region. Such explanations assume that a communal feeding ... its pelagic phase is extremely important. Recent South African research in this field has been ... . leonina in the southern Indian Ocean. Ce document decrit les conclusions de recherches entreprises ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Автор(ы): Bester, M.N. and D.G.M. Miller

6. 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

   in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI, Division 58.5.2 ... to 2008. A large proportion of the recaptures of fish released in this fishery were aged and these ... in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... of M have been studied using simulation. In application to the data obtained for the HIMI main trawl ... 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 ... M of 0.13 y–1 in Hillary et al. (2006) was based on Beverton-Holt invariants. The estimate of M ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Автор(ы): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins

7. CCAMLR ecosystem monitoring and a feedback management procedure for krill

   -term declines in land-based predator performance (e.g., reproductive performance) that may be ... attributable to loss of prey through fishing activities. The principal fishery in the CCAMLR Convention Area is ... the krill fishery and this paper examines ways in which the information being obtained from the ... Program has been developing a technique which might detect short-term declines in land-based predator ... activities. The principal fishery in the CCAMLR Convention Area is the krill fishery and this paper examines ... ways in which the information being obtained from the Ecosystem Monitoring Program might be ... discussions (see Nicol, 1991 for review) and resulted in the establishment of a Precautionary Catch Limit of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Автор(ы): Constable, A.J.

8. On the intensity of sampling krill trawl catches

   uses actual krill length-frequency data in an attempt to address the problem of the determination of ... be discerned (e.g., length-with-age). At present, and in the interests of both statistical rigour and ... differences in length should be considered in conjunction with the need to collect information on maturity ... CATCHES D.G.M. Miller* Abstract This paper uses actual krilllength-frequency data in an attempt to ... desired biological characteristics which are to be discerned (e.g., length-with-age). At present, and in ... implications associated with the detection of specific differences in length should be considered in ... krill? 1. INTRODUCTION At its first meeting in June 1989, the CCAMLR Working Group on Krill (WG ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Автор(ы): Miller, D.G.M.

9. Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics

   fishery in the Ross Sea region is comprised of two species, rather than being solely Macrourus whitsoni ... , was recognised in 2010 with the identification of a new species, M. caml. Grenadier are the main by ... -catch in the toothfish fishery and modelling suggests that they may be subject to predation release as ... the abundance of toothfish reduces. In order to improve information on the spatial distribution, age ... Grenadiers (Family Macrouridae) are taken as by-catch in many of the toothfish fisheries in the Southern ... main by-catch in the fishery for Antarc- tic toothfish (Dissostichus mawsoni) in the Ross Sea region ... reported in 1998, which increased to 480 tonnes in 2005 (Hanchet et al., 2008) and was 130 tonnes in 2014 ... (Stevenson et al., 2014). Grenadiers are also a major prey species of Ant- arctic toothfish in the region ...

   Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Автор(ы): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott

10. On reproduction of Electrona carlsbergi (Tåning)

    of the Southern Ocean. From materials available it has been ascertained that E. carlsbergi spawns in ... synchronous. Vitelline eggs have a diameter from 150 to 650 μm; in hydrated oocytes it is up to 900 μm ... summer/autumn in the Southern Hemisphere. File:  23-Mazhirina.pdf ... it has been ascertained that E. carlsbergi spawns in the notal waters. Maturation of females begins ... from 150 to 650 j.Ul1; in hydrated oocytes it is up to 900 /.lm. Maturation of ovaries is continuous ... , and spawning is serial. The spawning season is long and coincides with summer/autumn in the Southern ... species coincides with the notal zone. A study of gonads in female E. carlsbergi from the Antarctic ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 397–409 : Автор(ы): Mazhirina, G.P.

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