Résultats de la recherche

1. A re-analysis of the Kerguelen Shelf and Skiff Bank stocks of Champsocephalus gunnari

   -frequency data for the years 1981 to 1990. Cohort analysis yielded a Stock Biomass of 22 711 tonnes in 1988 ... possible declining trend in the abundance of this stock. Author(s):  G. Duhamel (France) and D.J. Agnew ... Abstract:  Catches of Champsocephalus gunnari from the Kerguelen Shelf and Skiff Bank stocks were ... re-calculated from those used by the Working Group on Fish Stock Assessment in 1989 using length ...

   Meeting Document : WG-FSA-90/17 : Auteur(s): G. Duhamel (France) and D.J. Agnew (Secretariat)

2. Some aspects of size composition dynamics of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea (Statistical Subarea 88.1)

   mawsoni) from catches in different statistical areas of the Ross Sea was given. Biological data for two ... both periods of the fishery, in the southern statistical areas (SSRU H, I, K, L), the portion of small ... -sized immature fish had increased though the average size of fish in catches had not changed ... Abstract:  The analysis of the data on size composition of Antarctic toothfish (Dissostichus ...

   Meeting Document : WG-FSA-12/17 : Auteur(s): A.K. Zaytsev (Ukraine)

3. Theoretical considerations for estimating the density of cohorts and mean recruitment of Patagonian toothfish (Dissostichus eleginoides) based on research trawl survey data

   assessing the long-term yield for toothfish fisheries in CCAMLR uses estimates of density of juvenile ... fishery. At the 2003 meeting of WG-FSA a number of inconsistencies were identified in the estimation of ... the recruitment series for Subarea 48.3. In light of this, the Scientific Committee agreed that there ... analyses; which age groups should be included in the estimation of recruitment, and the need for a clear ...

   Meeting Document : WG-FSA-04/92 : Auteur(s): C.R. Davies, E.M. van Wijk and A.J. Constable (Australia)

4. Acoustic visualization of the three-dimensional prey field of foraging chinstrap penguins

   Abstract:  Predator-prey interactions play an important role in determining the dynamics of ... the surface distribution of penguins and krill distributed in the 30- 40 m depth layer; no spatial ... ecosystems. Recently, concerns have arisen due to the commercial harvesting of Euphausia superba, the ... Antarctic krill, a keystone prey species in the Southern Ocean food web. It has been difficult to evaluate ...

   Meeting Document : WG-Joint-94/12 : Auteur(s): J.E. Zamon, C.H. Greene, E. Meir, D.A. Demer, R.P. Hewitt and S. Sexton (USA)

5. Population variability of biological parameters of penguins along the Antarctic Peninsula

   contribute to the general knowledge of penguin biological variation, to generate a data baseline in the ... parameters and factors affecting penguins biology along the Antarctic Peninsula is presented in order to ... context of environmental changes such as climate change and human activity and to support the proposal of ... the Western Antarctic Peninsula protected marine area. The results show higher levels of immunological ...

   Meeting Document : WG-EMM-2019/72 : Auteur(s): A. Barbosa

6. Observation of fishing operation and distributional behaviour of krill on a krill trawler off Wilkes Land during the 1985/86 season

   judge the towing direction. Size of fished swarms ranged from 100 m to 10 km with different distribution ... operation was described in detail. Fish finder was most useful in detecting swarms while sonar was used to ... in different fishing areas. While catch per towing time reflects within-swarm density catch per day ... was thought to be a good index to measure abundance of concentration. Comparison of such index across ...

   Meeting Document : SC-CAMLR-VI/BG/35 : Auteur(s): T. Ichii (Japan)

7. Can the chemistry of otolith nuclei determine population structure of Patagonian toothfish Dissostichus eleginoides?

   to South Georgia in the Southern Ocean. Concentrations of 55Mn, 88Sr, and 137Ba, ratioed to 42Ca ... , showed a sharp population boundary in the vicinity of the Polar Front, between South Georgia and the ... Abstract:  Otolith nucleus chemistry resolved the population structure of Patagonian toothfish ... between populations even in fully marine environments. Moreover, the nucleus chemistry indicated ...

   Meeting Document : WG-FSA-06/P2 : Auteur(s): Ashford, J.R., A.I. Arkhipkin and C.M. Jones

8. Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program

   few anomalous values have appeared in the data. An alternative procedure, using estimates of the mean ... correlated (greater than 0.6). Criteria for inclusion of parameters in the indices are discussed when ... power of the statistical procedure adopted by WG-EMM in 1996 for identifying anomalies in CEMP ... Abstract:  A potential method is presented for combining data collected as part of the CCAMLR ...

   Meeting Document : WG-EMM-00/14 Rev. 1 : Auteur(s): W. de la Mare and A. Constable (Australia)

9. A history of the acquisition and analysis of sea-ice data by CCAMLR

   the early years of development of the ecosystem monitoring program sea ice data, especially derived ... from satellite images, was recognised as an important source of information for interpreting changes in ... monitored predator parameters. Standard methods for collection of environmental parameters were agreed in ... source of data, digital images produced by the US National Snow and Ice Data Centre, with a relatively ...

   Meeting Document : WG-EMM-96/15 : Auteur(s): Agnew, D.J.

10. The reliability of VHF telemetry data for measuring attendance patterns of marine predators: a comparison with Time Depth Recorder data

    patterns of otariid seals. These data have been used in a wide variety of ways, from characterizing the ... . Additionally, there were significant differences in the number and duration of attendance bouts between the two ... . However, given the evolution of electronic tags in terms of sophistication, miniaturization, longevity and ... reproductive and foraging ecology of these species to inferring ecosystem changes based on variation in ...

    Meeting Document : WG-EMM-15/P05 : Auteur(s): A.D. Lowther, H. Ahonen, G. Hofmeyr, W.C. Oosthuizen, P.J. Nico De Bruyn, C. Lydersen and K. Kovacs

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