Résultats de la recherche

1. Observation of seabirds in the Southern Ocean in 1988/89

   ) facing the wake of the vessel and had a 180° range of vision. Each observation was preceded by the ... numerical distribution of birds in Antarctica (FIBEX Seabird Data Interpretation Workshop, Cape Town ... were only sighted in the area 524 bounded by the coordinates 77°16'S and 175°32'W; single skuas ... area seems to have been the main reason for the formation of such a large flock. This is supported by ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 521–542 : Auteur(s): Vagin, A.V. and V.V. Popov

2. A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty

   needs of dependent species (usually predators). These objectives have been endorsed by CCAMLR for ... being calculated by numerical integration over a one-year period. The model is initialised by setting ... projected through one year by numerical integration of the basic population differential equations. Catch ... that: Expressing natural mortality by an average level, which can be modified by relative patterns ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Auteur(s): Constable, A. and W.K. de la Mare

3. A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   International Whaling Commission (IWC)) recognised the importance of ecosystem modelling by convening a joint ... used to derive them. The first estimates that describe meth- ods were reported by Eklund and Atwood ... (Table 3), though they qualified this by noting that the two regional samples were inade- quate to ... crabeater seal densities, where appropriate, by adjusting counts of hauled-out seals upwards to the number ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Auteur(s): Southwell, C., J. Bengtson, M. Bester, A.S. Blix, H. Bornemann, P. Boveng and M. Cameron, J. Forcada, J. Laake, E. Nordøy, J. Plötz, T. Rogers, D. Southwell, D. Steinhage, B.S. Stewart and P. Trathan

4. A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

   found, while a more recent Bayesian meta-analysis of 128 stocks by Punt et al. (2005) yielded a poste ... ) Department of Mathematics and Applied Mathematics University of Cape Town Rondebosch 7701, South Africa ... , marked by a disconcertingly high level of IUU fishing, particularly in their early stages. The CCAMLR ... of the history of this fishery’s development, which was marked by extremely high levels of IUU fish ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Auteur(s): Brandão, A. and D.S. Butterworth

5. Book review: Fish and Fish Resources of the Antarctic

   work by K.V. Shust (Doctor of Biological Sciences), published in 1998, remains fairly unknown beyond a ... Russian-speaking readership. The book represents the first complete summary, prepared by a Russian author ... fish species. Moreover its value is enhanced by the author having participated in many fisheries ... South Atlantic expedition carried out by the research vessel Alademilc Knipovich in 1964/65 and up until ... , Russia antarctica@vniro.ru Published in Russian by: Russian Federal Research Institute of Fisheries ... . Zoogeographical zonation 2. Zonation by fish productivity Chapter I11 Ichthyogeographical cornplex of the ... resources Literature Cited This work by K.V. Shust (Doctor of Biological Sciences), published in 1998 ... summary, prepared by a Russian author, of original material and published data describing comlnercial ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 165–168 : Auteur(s): Shust, K.V

6. Determination of Antarctic krill acoustic back-scattering cross-section

   -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... signal from one specimen resolved by the hydroacoustic instrument. By calculating the mean level of the ... determine the acoustic cross-section of the back-scattering of krill. By experiments, the authors have ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... signal from one specimen resolved by the hydroacoustic instrument. By calculating the mean level of the ... determine the acoustic cross-section of the back-scattering of krill. By experiments, the author~ have ... ACOUSTIC BACK-SCATTERING CROSS-SECTION by V.A. Protaschuk and T.A. Lukashova All-Union Research ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 141-152 : Auteur(s): Protaschuk, V.A. and T.A. Lukashova

7. Species identification and age estimation for the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   whitsoni) from the Ross Sea Abstract / Description:  Samples of macrourid rattail by-catch from the ... toothfish fishery in the Ross Sea dependency in 2002 were identified by observers and returned to New ... Zealand for subsequent confirmation of their identity by researchers from the National Institute of Water ... the readings, separately by sex. M. whitsoni appears to be a slowgrowing and long-lived species ... , Wellington New Zealand Abstract Samples of macrourid rattail by-catch from the toothfi sh fi shery in the ... Ross Sea dependency in 2002 were identifi ed by observers and returned to New Zealand for subsequent ... confi rmation of their identity by researchers from the National Institute of Water and Atmospheric ... readings, separately by sex. M. whitsoni appears to be a slow- growing and long-lived species, living to ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 37–51 : Auteur(s): Marriott, P., P.L. Horn and P. McMillan

8. A review of the diet and at-sea distribution of penguins breeding within the CAMLR Convention Area (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   areas used by predators to levels that reduce their reproductive success or survival. Spatially–explicit ... bioenergetics models that estimate the amount of prey consumed by predators are required to inform such policy ... will be of utility to modellers as a source of parameters, and to penguin biologists by providing ... comparative information for their own findings and by highlighting significant gaps in existing knowledge and ... A key objective for CCAMLR is to estimate the biomass of different prey species consumed by ... interest is increasingly focusing on fine-scale spatial distribution of food consump- tion by predators in ... Populations (WG-EMM- STAPP) work and will be presented elsewhere. The review begins by giving an overview of ... distribution of the six penguin species that regularly breed within the CAMLR Convention Area, broken down by ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 75–114 : Auteur(s): Ratcliffe, N. and P. Trathan

9. Estimates of fish stock biomass around South Georgia in January/February 1985

   N. guntheri and D. eleginoides stocks is difficult to assess. The by-catch species N. gibberifrons ... , Ch. aceratus and Ps. georgianus have been considerably affected by the fishery. Stock sizes of N ... most greatly affected by fishing are still N. rossii and C. gunnari. Biomass estimates indicate a ... fishery is dependant on the abundance of the recruiting year class. Conservation measures adopted by ... and D. eleginoides stocks is difficult to assess. The by-catch species N. gibberifrons, Ch. aceratus ... and Ps. georgianus have been considerably affected by the fishery. Stock sizes of N. gibberifrons ... greatly affected by fishing are still N. rossii and C. gunnari. Biomass estimates indicate a reduction ... fishery is dependant on the abundance of the recruiting year class. Conservation measures adopted by ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Auteur(s): Kock, K.-H.

10. Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia

    population size. It does so by constructing a spatial model of the South Georgia toothfish fishery ... -scale boxes lying along the 1 000 m contour. The uneven distribution of fish was simulated by adjusting ... an average movement rate downwards when fish entered a high-density box (as indicated by high CPUE ... allows simulation of releases by box over multiple years. The model performed as expected with test ... placements and recapture effort, on bias in the Petersen estimator of population size. It does so by ... contour. The uneven distribution of fish was simulated by adjusting an average movement rate downwards ... when fish entered a high-density box (as indicated by high CPUE) and upwards in a low- density box, so ... that they tended to be retained in high-density boxes. The model allows simulation of releases by box ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Auteur(s): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark

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