Résultats de la recherche

1. Movement and growth of tagged toothfish around South Georgia and Shag Rocks (Subarea 48.3)

   recaptures of these fish tagged at South Georgia or elsewhere in the South Atlantic. Similarly, tags ... aims were to investigate the spatial and temporal movement of fish and to validate growth estimates ... CCAMLR observer trips. Of these, about 900 have also been injected with either Strontium Chloride or ... Oxytetracycline which places a marker on the otolith indicating the date of injection and release. To date, 50 ...

   Meeting Document : WG-FSA-02/28 : Auteur(s): T.R. Marlow, D.J. Agnew and I. Everson (United Kingdom)

2. Fishing of the Patagonian toothfish (Dissostichus eleginoides) by the Chilean fleet (1991/92) in the Subarea 48.3 (South Georgia Island) and proposed TAC for the 1991/1993 season

   at the north of South Georgia Island, including Black and Shag rocks, and the second one at the South ... of the island, hauls being made at depths between 1 100 and 1 450 m. The effort applied by the ... Chilean fleet totalled 2.71 million hooks, 2 883 tonnes were caught at an average CPUE of 1.06 k/hook ... estimated at 255 139 specimens, with a ratio of 59% males and 41% females. The stock assessment was made by ...

   Meeting Document : WG-FSA-92/24 : Auteur(s): P.A. Espina, M.A. Araya and V.V. Meniconi (Chile)

3. Comparing surface and planimetric area across multiple scales and assessing the impact of different data sources on seabed area estimation in research blocks in the CAMLR Convention Area

   the fishable depth range within research blocks showed differences of less than 2%. However, at the ... differences between surface and planimetric areas within fishable depth ranges at the scale of a research ... use of surface area measurement at the grid cell level. Author(s):  CCAMLR Secretariat Title ... Abstract:  Having accurate surface area estimates of toothfish (Dissostichus spp) habitats is ...

   Meeting Document : WG-SAM-15/01 : Auteur(s): CCAMLR Secretariat

4. REVIEW OF CCAMLR ACTIVITIES ON MONITORING MARINE DEBRIS IN THE CONVENTION AREA

   associated with seabird colonies and animals contaminated with hydrocarbons at a number of sites, primarily ... debris reported from monitoring sites. Relatively large amounts of fishing items have been reported at ... monitored at Bird Island with the majority of debris items being fishing lines and hooks. A total of 67 ... was oil. The last ten years of data show fluctuation in the occurrence of marine debris at any of the ...

   Meeting Document : WG-IMAF-09/08 : Auteur(s): Secretariat

5. Length composition, sex ratio, and pre-spawning migration of Dissostichus eleginoides in Subarea 48.3 during 1995

   South Georgia (NWSG). In March there was a high proportion of large females at Wshag (72%) but a nearly ... equal proportion of males and females at NWSG. It is suggested that a strong influx of small fish at ... seen at NWSG, although the sex ratio did change in favour of males (60% male by early May). The changes ... at Wshag are hypothesised to be the result of a prespawning migration of sub-adults, especially males ...

   Meeting Document : WG-FSA-95/27 Rev. 1 : Auteur(s): Agnew, D.J.

6. Exploitation of mesoscale oceanographic features by grey-headed albatross Thalassarche chrysostoma in the southern Indian Ocean

   southern Indian Ocean. During incubation, most birds foraged to the north of the island, at the edges of ... . In contrast, during chick-rearing all tracked birds foraged to the southwest of the island, at the ... . Diet samples taken from tracked birds showed birds feeding at edges of positive anomalies returning ... -support’ system enabling globally significant populations of seabirds and seals to breed at the Prince ...

   Meeting Document : WG-FSA-01/12 : Auteur(s): D.C. Nel, J.R.E. Lutjeharms, E.A. Pakhomov, I.J. Ansorge, P.G. Ryan and N.T.W. Klages (South Africa)

7. Summary of Ross Sea skate tagging programme results

   years at liberty shows that some skates survive and recover from being hauled out of depths of around ... probably increases the survival of released animals. Unfortunately, this means that length at release can ... Abstract:  Over 9,000 skates have been tagged and released in the Ross Sea over a period of seven ... years, and 47 (0.5%) have been recaptured. The recapture of tagged Amblyraja georgiana after up to four ...

   Meeting Document : WG-FSA-06/32 : Auteur(s): S.L. Ballara, A. Dunn and M.P. Francis (New Zealand)

8. Preliminary assessment of the South Georgia toothfish stock, 2007

   estimates of catches at age from 1998 to 2006 (based on random sampling of the catch for age determination ... ). Fits of all data (CPUE; catches at length for the early fishery; catches at age for the later fishery ... be considered, and that the toothfish assessment is undertaken at periods of greater than one year ... Abstract:  1. The catch-at-length based CASAL model for toothfish at South Georgia is updated with ...

   Meeting Document : WG-FSA-07/29 : Auteur(s): D.J. Agnew, R. Hillary and J. Pearce (United Kingdom)

9. THE RISK TO FISHERY PERFORMANCE ASSOCIATED WITH SPATIALLY RESOLVED MANAGEMENT OF ANTARCTIC KRILL (EUPHAUSIA SUPERBA) HARVESTING

   exploitable densities of the target species at the scale of fishing operations. The probability of ... encountering exploitable densities of Antarctic krill, Euphausia superba, at the 1 nm scale during an acoustic ... spatial scale of management units could usefully predict effects at the scale of fishing operations ... will affect fishery performance. One metric of potential performance is the probability of encountering ...

   Meeting Document : WG-EMM-09/P10 : Auteur(s): S. Hill, P. Trathan and D. Agnew

10. Density estimation of Antarctic krill (Euphausia superba) around South Shetland Island and Elephant Island (Subarea 48.1) using two frequencies with 38 and 120 kHz

    software for swarm identification) and interval method based on distribution of (a) total krill AT and (b ... Abstract:  The density of Antarctic krill swarm inhabiting the Subarea 48.1, which includes the ... Elephant Island peripheries and the west and north of the South Shetland Island, was estimated using an ... ) each transects krill AT. The weighted krill density was estimated to be 4.27 g/m 2 (CV=43.42%) applying ...

    Meeting Document : SG-ASAM-2019/03 Rev. 1 : Auteur(s): S. Choi, S. Chung, I. Han, W. Oh, D. An and K. Lee

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