Résultats de la recherche

1. Consultation on Secretariat catch and effort monitoring: Secretariat proposals arising from the feedback from Members

   Management issues. Finally, two projects are proposed for development in 2019, one to trial electronic ... reporting of catch data and one to develop a stable, documented warehouse of CCAMLR data. Author(s):  CCAMLR ...

   Meeting Document : CCAMLR-XXXVII/BG/22 : Auteur(s): CCAMLR Secretariat

2. Revised research longline fishing proposal for Dissostichus spp. in Subarea 48.2, second season

   Modelling (WG-SAM) during the meeting held in Buenos Aires, Argentina, on 26 to 30 June 2017. Among the ... real scientific collaboration that could be implemented after 2018 season, which was welcomed by the ... is required to facilitate the operational and scientific collaboration going forward. Author(s ...

   Meeting Document : WG-FSA-17/27 : Auteur(s): Delegation of Chile

3. Variation in the distribution of Antarctic krill Euphausia superba around South Georgia

   (PCA) provided good separation of these clusters using the first two axes (80 % of the total variance ... types with relatively simple biological characteristics: cluster 1 were medium-sized year 2+ krill (mean ... size 39.7 mm); cluster 2 were a mixture of year classes (mean size 37.7 mm); cluster 3 were large krill ... probably 3+ and older (mean size 49.5 mm); cluster 4 and 5 were small krill, mostly year 1 + either with or ...

   Meeting Document : WG-EMM-97/47 : Auteur(s): Daly, H.I., Murray, A.W.A., Watkins, J.L.

4. Conflict or co-existence? Foraging distribution and competition for prey between Adélie and chinstrap penguins

   between the two species, however, in a year of normal resource availability (2001) there was no such ... the South Sandwich Islands to the Antarctic Peninsula. To investigate how these two species co-exist ... both species was exclusively Antarctic krill (Euphausia superba) of the same size range. In a year of ... penguins and 24 chinstrap penguins were used to compare foraging distributions. In both years the diet of ...

   Meeting Document : WG-EMM-02/15 : Auteur(s): A.S. Lynnes, K. Reid, J.P. Croxall and P.N. Trathan (United Kingdom)

5. DEVELOPMENT OF RECOVERY PLANS FOR DEPLETED TOOTHFISH STOCKS IN THE INDIAN OCEAN SECTOR OF THE SOUTHERN OCEAN

   years and then two years later. The surveys should have only low catches in order to not impede recovery ... variability. After the two surveys, data should be analysed to determine how fast the stock is recovering and ... trajectories indicate it is likely that it will be at least 5 years before it is sufficiently low risk to ... comparison with historical catch rates and otolith collection to estimate age structure and recruitment ...

   Meeting Document : WG-FSA-09/44 : Auteur(s): D.C. Welsford, A.J. Constable and J.P. McKinlay (Australia)

6. Evaluation on the performance of echosounder on a fishing vessel using maximum seabed backscattering

   and 2018) collected at a relatively fixed location with bottom depth around 200 m were used to ... calibration. The largest inter-annual difference of the mean value of the maximum seabed backscattering (S v ... , respectively. However, ANOVA analysis indicated that there was no significant difference among years at both ... frequencies. Author(s):  X. Wang, X. Yu and X. Zhao Title:  Evaluation on the performance of echosounder on a ...

   Meeting Document : SG-ASAM-18/06 : Auteur(s): X. Wang, X. Yu and X. Zhao

7. Estimates of abundance of Dissostichus eleginoides and Champsocephalus gunnari from the random stratified trawl survey in the waters surrounding Heard Island in Division 58.5.2 for 2019

   year. Catches of skates were similar to those of the last three years, which have been higher than ... average. Invertebrate catch (including jellyfish) in the 2019 survey was lower than that of 2018, with ... the past 10 years. Biomass estimates for the managed by-catch species C. rhinoceratus and Macrourus ... last 4 years. The 2019 biomass estimates for each of the three Bathyraja spp. (skates) were the highest ...

   Meeting Document : WG-FSA-2019/03 : Auteur(s): G.B. Nowara, T.D. Lamb and P. Ziegler

8. Natural fluctuations in the abundance of krill with due regard to global climate changes in the southern hemisphere: forecasting possibilities

   years of development of El Niño off South America (Jordan, 1991). These facts may lead one to assume ... between the strong year-classes of krill and severe winters when the ice-cover extended itself northwards ... constantly both in scientific and commercial fishing gear. Poor year-classes of krill and upsurges in the ... the South Ocean in recent years made it possible for scientists to establish a rather clear ...

   Meeting Document : WG-EMM-98/52 : Auteur(s): K. Shust (Russia)

9. Investigation of the sensitivity of the Ross Sea toothfish assessment to withholding subsets of the available data

   model outputs of withholding from a stock assessment between one and eight years of age frequency and/or ... the effect of not updating an assessment every year, and also the evolution of stock assessments with ... assessments, when each extra year of withheld data represented a large contribution to the model. In later ... example even when the number of tag recaptures in the most recent year was doubled or halved, the ...

   Meeting Document : WG-SAM-11/17 : Auteur(s): S. Mormede (New Zealand)

10. Performance metrics to index the spatial coverage of mark-recapture data

    new biomass-weighted spatial overlap summary statistics for tagging data. The method calculates two ... was 70% (95% CIs 53–80%), and the median tag overlap bias was 88% (95% CIs 64–114%). In 2014 the ... fisheries, and a measure of the change in bias of mark-recapture estimates through time. Author(s):  C ... . Marsh, A. Dunn and S. Mormede Title:  Performance metrics to index the spatial coverage of mark ...

    Meeting Document : WG-SAM-16/13 : Auteur(s): C. Marsh, A. Dunn and S. Mormede

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