Résultats de la recherche

1. Temporal variation in Antarctic sea-ice: analysis of a long-term fast-ice record from the South Orkney Islands

   Abstract:  Detection of climate-induced change in marine ecosystems requires a knowledge of the ... variability in Southern Ocean sea-ice dynamics. We present the first analysis of a series of fast-ice duration ... indicate that there has been a long term decline in the duration of sea-ice at the South Orkney Islands in ... the result of a reduction in the duration of fast-ice during the 19405 and 1950s. There was a ...

   Meeting Document : WG-EMM-95/80 : Auteur(s): Symon, C., Murphy, E.J., Priddle, J., Clarke, A.

2. A meta-analysis of by-catch in the Ross Sea toothfish fishery

   location of fishing. However, there was also evidence of distinct differences in the mean (and distribution ... Abstract:  Following the recommendation of WG-FSA in 2014 the Secretariat has undertaken an ... analysis of by-catch in CCAMLR longline fisheries. The numerical target catch ratio (the number of target ... ) in the index from two groups of Members flagged vessels, that together contribute 84% of the haul by ...

   Meeting Document : WG-SAM-15/23 : Auteur(s): CCAMLR Secretariat

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

   of the two northern strata and at the western end of Shag Rocks, with one high catch recorded in the ... South West to 33.49% IRI in the South East. Catches of juvenile Dissostichus eleginoides were small and ... results obtained in 2017. The estimated biomass of Notothenia rossi was higher than observed in 2017 and ... is the second highest seen in the survey time series. The estimated biomass of Patogonotothen ...

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

4. Spatio-temporal dynamics of the Antarctic krill fishery in Subarea 48.1 based on data collected on board F/V Fu Rong Hai

   played an important role in the feed-back management of krill fishery. The CPUE data collected from the ... spatial dynamics of the population and the fishery of krill in CCAMLR Subarea 48.1. The acoustic data ... autumn, the fishing activity usually concentrated in the middle of the Bransfield strait Acoustic data ... showed similar dynamics of the krill in the Bransfield strait with CPUE data in the 2015/16 fishing ...

   Meeting Document : WG-EMM-18/41 : Auteur(s): Y. Ying, X. Wang, X. Zhao, J. Zhu, G. Fan and X. Yu

5. Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Bird Island, South Georgia, during the 2004 winter and 2004/05 breeding season

   Abstract:  The number of entanglements in the fifteenth consecutive winter surveyed, decreased by ... 64% from last year. For the first time since records started in 1990, none of the injuries were ... % compared to last year; the lowest number of entanglements recorded since 1989. As in previous years, most ... individuals observed entangled in debris were juveniles (80% of winter and 50% of summer observations). Of the ...

   Meeting Document : SC-CAMLR-XXIV/BG/16 : Auteur(s): Delegation of the United Kingdom

6. Proposal for a CCAMLR sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea

   Subarea 88.1 and for nine years in Subarea 88.2. Associated research has led to an assessment of the ... fisheries potential yield, but a source of ongoing uncertainty in the stock assessment concerns recruitment ... research survey in response to the Scientific Committee request. We consider here the objectives of the ... location, the number of sets in each stratum required to achieve target c.v.s, and associated sampling ...

   Meeting Document : WG-SAM-11/16 : Auteur(s): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)

7. A REVIEW OF THE METHODS USED TO RELEASE SKATES (RAJIIDS), WITH OR WITHOUT TAGS, IN ANTARCTIC EXPLORATORY FISHERIES

   implemented was that some form of in-water release would be the ideal to improve survival chances ... a timely fashion in a manner most likely to ensure survival. The advantages of this method have been ... the more effective scanning of the captured skate for existing tags, greater accuracy in the ... seasons in preparation for the ‘Year of the Skate’ prior to a final decision on skate release protocols. A ...

   Meeting Document : WG-FSA-08/30 : Auteur(s): J.M. Fenaughty (New Zealand)

8. Managing ecosystem uncertainty: critical habitat and dietary overlap of top-predators in the Ross Sea

   managers of the close spatial and temporal ecological overlaps among top predators in the Ross Sea Shelf ... well within range. In the RSShE, the main prey species eaten by most of the listed predators is the ... Antarctic silverfish, which is a major predator of ice krill. Based on frequency of occurrence in the diet ... . Title:  Managing ecosystem uncertainty: critical habitat and dietary overlap of top-predators in the ...

   Meeting Document : WG-EMM-06/29 : Auteur(s): Testa, J.W., Stewart, B.S., Olmastroni, S., Lyver, P., Karl, B., Eastman, J., Barton, K., Ballard, G., Toniolo, V., Wilson, P., Ainley, D.

9. Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 1993 winter and 1993/94 pup-rearing season

   in 1990 and 1991. Nearly all animals were juveniles, half with severe injuries and the proportion of ... females (40%) was the highest yet reported. The proportion of animals entangled in packaging bands was the ... bags were important as entangling materials. In the 1993/94 summer the number of seals entangled (23 ... %), the decrease in the latter mirroring the records of the preceding winter. However, 68% of animals ...

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

10. Penguin foraging behavior in relation to the distribution of prey

    of their primary prey, krill (Euphausia superba) in the vicinity of Seal Island, South Shetland ... migration pattern, being dispersed in the upper portion of the water column at night and more concentrated ... dives did not exceed the maximum depth distribution of krill. These patterns in diving behavior may ... determined by the intensity of predation pressure by predators which feed in the upper portion of the water ...

    Meeting Document : WG-KRILL-93/47 : Auteur(s): D.A. Croll, R.P. Hewitt, D.A. Demer and J.K. Jansen (USA)

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