Résultats de la recherche

1. Manual: estimating the age of Patagonian toothfish (Dissostichus eleginoides) using transverse cross-sections of otoliths

   noted in the growth parameters being used for assessments of toothfish. To assess whether these ... nations participated in a Workshop in 2001 at Old Dominion Unversity with the primary aim of seeking ... conformity in estimating age of Patagonian toothfish (Dissostichus eleginoides). Arising from the workshop ... in reading otoliths; quality assurance and control; and the use of reference sets to monitor ...

   Meeting Document : WG-FSA-10/15 : Auteur(s): K. Underkoffler, N. Ramanna and J. Ashford (USA)

2. Comparison of estimators of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial Distribution

   Abstract:  The incorporation of “effective sample size” (ESS) in integrated assessments is an ... -length frequency data relative to the other types of data used in integrated assessments of toothfish ... simulation results are used to discuss the issue of estimating ESS in the presence of process error. It is ... approximate but simple way of modelling the distribution of catch-at-age or catch-at-length frequencies using ...

   Meeting Document : WG-SAM-07/7 : Auteur(s): S.G. Candy (Australia)

3. Breeding biology and diet of pintado petrels Daption capense at Bouvetøya during the summer of 1996/97

   was 85 %. Rates of failure were higher during the chick stage than in the egg stage for both of these ... chicks in the third study colony was similar to that recorded for other populations of Pintado Petrel, as ... . Whole female krill occurred more frequently than male krill in the diets of chick-rearing Pintado ... two study colonies. The mean hatching date in these colonies was 11 January, and the first and last ...

   Meeting Document : WG-EMM-97/56 : Auteur(s): Isaksen, K., Huyser, O., Dyer, B.M., Cooper, J., Ryan, P.

4. ANALYSIS OF ICE-FISH (CHAMPSOCEPHALUS GUNNARI) SPATIAL DISTRIBUTION FOR OPTIMIZATION OF THE BOTTOM TRAWL SURVEY SAMPLING

   surveys in the South Georgia area are analyzed. The high heterogeneity of horizontal and vertical fish ... distribution in the near-bottom layers within the surveyed area is shown. Influence of this fish distribution ... considerable degree stipulated by heterogeneity of fish distribution in the near-bottom layer relative to the ... Abstract:  Acoustic and trawl samples obtained in the near-bottom layers covered by bottom trawl ...

   Meeting Document : WG-SAM-09/20 : Auteur(s): S.M. Kasatkina (Russia)

5. Towards further development of stock assessment of stock abundance for Subarea 48.6 taking into account the developments since 2012 – a discussion paper

   since 2012 and some review of work that could offer lessons in how to advance stock assessment in ... Subarea 48.6 in 2019. Author(s):  Delegations of Japan and South Africa Title:  Towards further ... development of stock assessment of stock abundance for Subarea 48.6 taking into account the developments since ... Abstract:  This paper outlines stock assessment related work that has been done in Subarea 48.6 ...

   Meeting Document : WG-FSA-18/66 : Auteur(s): Delegations of Japan and South Africa

6. 2007 krill biomass update of the South Shetland and Elephant Island regions of Area 48

   Abstract:  Antarctic krill biomass trends in the South Shetland Island region of Area 48 are ... 2007), acoustic biomass estimates previously presented at the 2006 WG-EMM meeting in Namibia (WG-EMM-06 ... /32). In 2007, biomass in the South Shetland Islands region exceeded 19 million tons. This increase ... from Author(s):  C.S. Reiss and A.M. Cossio (USA) Title:  2007 krill biomass update of the South ...

   Meeting Document : WG-EMM-07/31 : Auteur(s): C.S. Reiss and A.M. Cossio (USA)

7. Reconciling theoretical versus empirical target strengths of krill; effects of phase variability on the distorted wave Born approximation

   , the authors noted that the differences were not entirely due to noise. In this study, the accuracy of ... elements of a discretized bent cylinder (krill model) causes a dramatic flattening in the side-lobe regions ... Abstract:  A model was recently proposed to predict the target strengths (TS) of Antarctic krill ... ]. Based on the distorted wave Born approximation (DWBA), the model depends upon the coherent summation of ...

   Meeting Document : WG-EMM-02/50 : Auteur(s): D.A. Demer and S.G. Conti (USA)

8. Population demography of Antarctic fur seals: the costs of reproduction and implications for life-histories

   Abstract:  1. This study examined the costs of reproduction in terms of future survival and ... result of pregnancy which accounted for 40–50% of adult female mortality. This effect was greatest in the ... animals having been pregnant in the previous year. 6. Reproduction incurs costs to females, in terms of ... . 2. Population age structures were used, in conjuction with the measured age-specific survival rates ...

   Meeting Document : WG-EMM-95/26 : Auteur(s): Reid, K., Croxall, J.P., Lunn, N.J., Boyd, I.L.

9. Modelling Movement of Antarctic Krill (MMAK): the importance of retention, dispersal and behaviour for krill distribution – a project update

   that influence the distribution of Antarctic krill in CCAMLR Area 48, focussing in particular on the ... investigate the impact of physical and behavioural processes on the distribution of krill in this area, at ... being investigated, which will include examination of the role of tides in determining on-shelf ... Antarctic Wildlife Research Fund, to improve current understanding of the regional and local-scale processes ...

   Meeting Document : WG-EMM-18/06 : Auteur(s): S.E. Thorpe, E.F. Young, E.J. Murphy, O.R. Godø and A.H.H. Renner

10. Effects of different harvesting strategies on the stock of Antarctic icefish Champsocephalus gunnari around South Georgia

    harvesting alternative. In the absence of regular recruit surveys constant fishing at F0.1 is most likely to ... Abstract:  The effects of a number of harvesting strategies on the Antarctic icefish ... years after a good recruitment,- pulse fishing at an interval of 3 years with no fishing in between;- a ... shift in partial recruitment values due to changes in net selectivity. For the projections recruitment ...

    Meeting Document : SC-CAMLR-VIII/BG/47 : Auteur(s): Delegation of Federal Republic of Germany

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