Résultats de la recherche

1. Intra-annual variability in the abundance of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ krill density estimates

   survey estimates with the observed pattern of within-year variability showed that some of the alleged ... pattern in krill abundance was detected that recurred consistently over all 3 years. Krill densities in ... (mean = 89.5 g m-2 SD 64.2). A simple polynomial regression model with time as the independent variable ... periods suggesting that the mooring point estimates had relevance in a wider spatial context (ship surveys ...

   Meeting Document : WG-EMM-06/25 : Auteur(s): R.A. Saunders, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein, D.G. Bone and A.S. Brierley (United Kingdom)

2. Feasibility of lead-radium dating the otoliths of blackfin icefish (Chaenocephalus aceratus) and ocellated icefish (Chionodraco rastrospinosus)

   that the collection of otoliths from these species be given a priority whenever possible to facilitate ... determining the parameters of future applications that would lead to a validation of age. In the current study ... , sample mass for the pooled otolith samples was low (~0.4 g). This finding, coupled with low radium-226 ... levels, led to age determinations that had a high margin of uncertainty; however, the findings led to an ...

   Meeting Document : WG-FSA-10/17 : Auteur(s): A.H. Andrews, M. La Mesa and J. Ashford (USA)

3. Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts

   method. We obtained the additional evidence that ‘high CPUE’ regime’ in 2006-2011 is not associated with ... Abstract:  In previous years we revealed that period 2006-2011 is characterized by the highest ... methods. Our investigation shows how fishery operated by years and month in each SSMUs with special ... fishing methods on fleet locations was not revealed also.     Our opinion is that climate changes can ...

   Meeting Document : WG-EMM-14/21 : Auteur(s): S. Kasatkina and P. Gasyukov (Russia)

4. Sensitivities in the assessment of the Patagonian toothfish (D. eleginoides) in Subareas 48.3 and 48.4 to truncation of tagging data

   double-tagged recaptures suggests that including recaptures from fish at liberty for long periods will ... introduce bias into the assessment. Sensitivity tests on both stocks show that this bias occurs in practice ... . Sensitivity tests on the 48.3 assessment show that this bias is not entirely explained by the effect of double ... tagging. Author(s):  T. Earl Title:  Sensitivities in the assessment of the Patagonian toothfish (D ...

   Meeting Document : WG-SAM-17/35 : Auteur(s): T. Earl

5. Krill biomass and distribution in Subarea 48.2 during summer 1996

   density in the day-time amounted to 30.4 g/sq.m are comparable with density values, observed in the ... obtained seem to be considered as underestimated and typical only for the late summer season, since in the ... early summer season krill density may be higher. Krill biomass estimate (1.12 ± 0.093 mln.t) in acoustic ... characterized by relatively high accurancy (CV = 4.1 %). However, this estimate is likely to be biased towards ...

   Meeting Document : WG-EMM-97/49 : Auteur(s): Kasatkina, S.M., Abramov, A.M., Polischuk, M.I., Sushin, V.A.

6. Hydroacoustic observations of the vertical distribution of icefish Champsocephalus gunnari in the western part of the slope of the South Georgia Island in December 1999–January 2000

   be concluded that assessments of Champsocephalus gunnari stock based on the results of bottom trawl ... echograms obtained with the use of an echograph of the "Priboi-101" echo sounder during the ... concentrations of icefish can be considered by the type of the vertical distribution as bottom/pelagic ones, and ... surveys can be underestimated. Author(s):  V.L. Senioukov (Russia) Title:  Hydroacoustic observations of ...

   Meeting Document : WG-FSA-00/19 : Auteur(s): V.L. Senioukov (Russia)

7. Diagnostic tools for Champsocephalus gunnari stock assessments

   for a set of standard diagnostics including R code to be used for mackerel icefish (Champsocephalus ... gunnari) stock assessments presented to WG-FSA. Author(s):  D. Maschette, T. Earl and R. Sinègre Title ...

   Meeting Document : WG-SAM-18/34 : Auteur(s): D. Maschette, T. Earl and R. Sinègre

8. Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history

   ) and increased with age at death. Changes in the growth pattern of teeth suggested that fur seals which ... significant correlations between morphometrics of teeth and those of seals, suggesting that tooth growth ... compared with the expected layer depth based on a linear relationship between layer depth and age at which ... in different years, suggesting that growth was greater in some years than others. No trends in cohort ...

   Meeting Document : WG-CEMP-93/11 : Auteur(s): I.L. Boyd and J.P. Roberts (United Kingdom)

9. Beach debris survey - Main Bay, Bird Island South Georgia 1992/93

   bands were not found until August, coinciding with the arrival of krill fishing vessels off northwest ...

   Meeting Document : CCAMLR-XIII/BG/03 : Auteur(s): Delegation of United Kingdom

10. Mackerel icefish ecological indices

    CEMP. With that in mind the following indices are outlined that might be incorporated in the programme ...

    Meeting Document : WG-EMM-03/42 : Auteur(s): I. Everson (United Kingdom), K.-H. Kock (Germany) and A.W. North (United Kingdom)

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