Résultats de la recherche

1. Modelling Southern Ocean krill population dynamics: biological processes generating fluctuations in the South Georgia ecosystem

   . The krill population model was combined with a size-based selection function and used to generate ... model solutions with the predator diet data indicates that the model can reproduce the observed pattern ... fluctuations observed during some years. Low krill abundance was associated with reduced representation of the ...

   Meeting Document : WG-EMM-01/53 : Auteur(s): E. Murphy and K. Reid (United Kingdom)

2. Krill population dynamics at South Georgia 1991–1997, based on data from predators and nets

   scientific nets from the same area over the summers of 1991-1997. In comparing the 5 years with both predator ... sampling the same overall krill population. Greatest similarity results from comparing net samples with ... and thereafter increased steadily to 1997. Using these data in conjunction with putative size/age ...

   Meeting Document : WS-AREA 48-98/15 : Auteur(s): K. Reid, J. Watkins, J. Croxall and E. Murphy (UK)

3. Models of tag shedding for double tagging as a function of time at liberty and approximate solutions for the single tagging model in CASAL

   software applies this model correctly for fish released with a single tag but does not have the facility at ... present to correctly apply the KW model for fish released with two tags. The solution of Dunn et al. (2005 ... combined with a sensitivity analysis that varies the KW constant rate parameter in CASAL assessments ...

   Meeting Document : WG-SAM-11/12 : Auteur(s): S.G. Candy (Australia)

4. OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL

   view that krill require high food concentrations, with a distribution often linked to shelves. For a ... , with 70% of the total stock concentrated between 0o and 90oW. Within this Atlantic sector, krill are ... evidence for a compensating southwards migration, with an increasing proportion of krill found south of the ...

   Meeting Document : WG-EMM-08/P04 - Abstract : Auteur(s): A. Atkinson, V. Siegel, E. A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, G.A. Tarling and A.H. Fleming

5. THE POWER OF ECOSYSTEM MONITORING

   monitoring programme of the predators of Antarctic krill Euphausia superba at South Georgia together with a ... % power after 20 years with the probability of a type I error (α) = 0.05). The power increased to >50 ... % when α was increased to 0.2 when the ability to detect change was greater with the predator response ...

   Meeting Document : WG-EMM-08/P11 : Auteur(s): K. Reid, J.P. Croxall and E.J. Murphy

6. The use of electronic monitoring camera system for the toothfish fishery in CCAMLR Subarea 48.3: a study case to help CCAMLR

   requires considerable effort and cost with mixed results.  For example it is not always possible to achieve ... divided in settings and hauling operations where at-sea observations were matched with video footage ... by a scientific observer was compared with recorded video footage recorded by 3 different video ...

   Meeting Document : WG-FSA-14/27 : Auteur(s): R.A. Benedet (United Kingdom)

7. An approach to feedback management (FBM) of the krill fishery based on routine acoustic data collection and intermittent land-based predator studies

   . As the trigger level lacks any form of relationship with the actual stock condition this approach is ... strictly not in line with the CCAMLR ecosystem approach to management. FBM has been considered an ... can be integrated with finer-scale knowledge of top predator feeding strategies and updated through ...

   Meeting Document : SC-CAMLR-XXXVI/BG/20 : Auteur(s): Delegations of Norway, China and Chile

8. Otolith chemistry reveals local population structure of Antarctic toothfish (Dissostichus mawsoni) within the CCAMLR Subarea 48.6

   Abstract:  Antarctic toothfish Dissostichus mawsoni is an important fish species with ecological ... with ontogeny and different between spawning/hatching ground and the area that fish captured. Otolith ... chemistry with combining to oceanography and tagging data may provide more accurate information on ...

   Meeting Document : WG-FSA-18/75 : Auteur(s): L. Wei, G.P. Zhu, S. Somhlaba, X.Y. Yu and M. Duan

9. Report of the UK Groundfish Survey at South Georgia (CCAMLR Subarea 48.3) in January/February 2019

   calculated at 50,897 tonnes with a lower 1-sided 95% interval estimate of 30,288 tonnes. This is lower than ... in 2017, but is comparable with the long term average. The highest catches were on the moraine banks ... of the two northern strata and at the western end of Shag Rocks, with one high catch recorded in the ...

   Meeting Document : WG-FSA-2019/20 : Auteur(s): S. Gregory, P. Hollyman, T. Earl, A. Clement, J. Visagie, L. Featherstone and M. Belchier

10. Heart rate and behaviour of fur seals: implications for measurement of field energetics

    interacted with diving activity and swimming speed to produce a complex relationship between heart rate and ... activity patterns. Heart rate was also correlated with behavior over time lags of several hours. There was ...

    Meeting Document : WG-EMM-99/36 : Auteur(s): I.L. Boyd, R.M. Bevan, A.J. Woakes and P.J. Butler (United Kingdom)

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