Résultats de la recherche

1. Estimation and correction of migration-related bias in the tag-based stock assessment of Patagonian toothfish in Division 58.5.2

   . Our simulations demonstrated that emigration of tagged fish out of the assessed area results in ... migration rate from Division 58.5.2 to 58.5.1 was estimated to be 1.1% using longline releases from 2007 ... 58.5.2 was estimated to be 0.4% and was insensitive to the time period of longline tag releases used. For ... annual migration rates <2%, consistent with those we observed in Patagonian toothfish on the Kerguelen ...

   Meeting Document : WG-SAM-17/11 : Auteur(s): P. Burch, P. Ziegler, D. Welsford and C. Péron

2. Review of the use of survey data and length-at-age models in the assessment of Dissostichus eleginoides in the vicinity of Heard Island and McDonald Islands (Division 58.5.2)

   that best estimates of cohort abundance will be achieved when mixture analysis is informed by accurate ... abundance of specific cohorts were sensitive to the number of cohorts assumed to be represented in the ... year such as could be derived through an age length key, and the selectivity of the gear used in the ... abundance of juvenile fish and the length-at-age model were also examined. Yield estimates were found to be ...

   Meeting Document : WG-FSA-06/44 Rev. 1 : Auteur(s): D.C. Welsford, A.J. Constable and G.B. Nowara (Australia)

3. White-chinned petrel incidental mortality event in the Subarea 48.3 Patagonian toothfish fishery during the season extension period in the 2013/14 season

   vessels very rarely catch seabirds. In accordance with CM 41-02, there will not be a season extension in ... for over 10 years. The circumstances associated with the event were investigated and a review of ... that was partly set after Nautical Twilight (dawn), so was in breach of CM25-02. Although the line was ... available data indicates that, while the risk of seabird mortality is slightly higher in April, autoline ...

   Meeting Document : WG-FSA-14/28 : Auteur(s): M.A Collins, M. Soffker, C. Darby, K. Ross and P.N. Trathan (United Kingdom)

4. Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)

   participation in the fishery, with only some Small-scale Research Units (SSRUs, consisting of 10° longitude ... explores several methods for arriving at estimates of sustainable yields. Biological data suggest that ... there are two stocks in the area, one in Division 58.4.1 and one in Division 58.4.2, with the division ... between them being at about 90°E. The western stock may be centred around Prydz Bay, and appears to be of ... 58.4.2, with the division between them being at about 90°E. The western stock may be centred around ... critical that spatial variations in catch rate are accommodated. This is generally dealt with by spa ... - tially stratifying the data so that each area can be considered of constant biomass density. An overall ... for SSRUs that are cur- rently closed. Furthermore, limited research fish- ing (with a 10 tonne catch ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Auteur(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán

5. Demonstrating proof of concept of the application of systematic conservation planning at the circumpolar scale

   Marxan. This report offers a proof of concept that systematic conservation planning can be applied at a ... establish meaningful protection for the unique biodiversity of the Southern Ocean. With conservation ... the remaining priority areas, and ensure that proposals arising out of individual priority areas can ... be incorporated into a whole of Southern Ocean context, while also enabling planning work to occur ...

   Meeting Document : WG-EMM-10/34 : Auteur(s): D. Beaver, R. Nicoll, G. Llewellyn, P. Harkness, C. Hellyer and J. Turner (ASOC-WWF)

6. Chapter 8: Secretariat operations and financing

   ensure that capacity building and associated outreach support is strengthened in the next review of the ...  10.11; Annex 7, paragraph 22) Completed Recommendation 29: Further cost reduction options be considered ... opportunities be encouraged, including through a review of cost recovery, consideration of research ... , 37) (2019) The Commission has agreed a new notification fee structure that will increase annually ...

   Page : Site Section: The Organisation

7. Spatial scales of benthic invertebrate habitats from fishery by catch and video transect data in the Ross Sea region

   these data allows the detectability of sponges and gorgonian corals to be estimated, along with changes ... collected for two fishing seasons, with 4728 longline segments observed. Several regions with consistent ... with no evidence of sponge or gorgonian presence. Identifiable sponge and/or gorgonian habitats ... in catch rate at different densities. Results indicate that sponge patches are detected more than 70 ...

   Meeting Document : WG-EMM-10/28 : Auteur(s): S.J. Parker, R.G. Cole and S.M. Hanchet (New Zealand)

8. Variability of krill fishery operations in Subarea 48.2 in relation to fishing methods: spatial–temporal distribution of CPUE and of fishing efforts

   in Subarea 48.2 with special attention to the period 2006-2011 which is characterized by the highest ... fishing methods. It was shown how fishery operated by years and month in each SSMUs with special attention ... to differences between national fleets. Our results provide the evidence that ‘high CPUE’ regime’ in ... 2006-2011 is not associated with the changes in fishing methods and the trend in long-term fishery in ...

   Meeting Document : WG-EMM-14/22 : Auteur(s): S. Kasatkina (Russia)

9. Distribution, morphology and ecology of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) in the Ross Sea region

   . whitsoni caught with depth. Catches of females of both species exceeded that of males (especially for M ... teeth in the lower jaw allowed the two species to be distinguished both in the laboratory and by ... species are euryphagous predators and scavengers, with evidence of piscivory and both benthic and pelagic ... feeding. Amphipods were one of the main crustaceans consumed. Data tentatively suggest that M. caml may ... solid lines). Noting that the results should be treated with caution until more complete length-at-age ... . whitsoni caught with depth. Catches of females of both species exceeded that of males (especially for M ... to be normal with constant CV over length. Analysis was carried out in R (R Develop- ment Core Team ... and East strata, with a spatial distribution similar to that of other samples used in this study ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 37–61 : Auteur(s): Pinkerton, M.H., P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown

10. Modelling the predator–prey interactions of krill, baleen whales and seals in the Antarctic ecosystem

    that has become available since the postulate was first advanced is discussed. The objective of the ... and the assumptions on which they are based is discussed, together with suggested further areas for ... investigation. Amongst the key inferences of the study are that: i) species interaction effects alone can ... consider other species in addition to baleen whales and krill only to explain observed trends, with ...

    Meeting Document : WG-EMM-05/34 : Auteur(s): M. Mori and D.S. Butterworth (South Africa)

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