Résultats de la recherche

1. The toothfish fishery and tagging program in the Amundsen Sea region (SSRUs 882C–H) to 2016/17

   Abstract:  Fishing in the Amundsen Sea region (SSRUs 882C–H) has been managed through a research ... to carry out a reliable stock assessment of the toothfish stock in that area. In this report, we ... precautionary. In the 2016 and 2017 seasons, a total of 19 tagged fish (excluding within season recaptures) were ... recaptured in the research blocks in the South Amundsen Sea region, confirming the utility of the research ...

   Meeting Document : WG-FSA-17/39 : Auteur(s): S. Parker and S. Mormede

2. Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 and 120 kHz

   Abstract:  Differences in the target strength of adult Antarctic krill (Euphausia Superba) at 38 ... and 120 kHz have been inferred from differences in the mean back-scattering strength of swarms ... simultaneously insonified at these two frequencies in studies off the South Orkneys and Elephant Island in March ... 1990. Krill in these areas varied in total length between 36 and 60mm. Backscattering strengths at 120 ...

   Meeting Document : WG-KRILL-90/28 : Auteur(s): I. Hampton (South Africa)

3. Characterisation of skate catches in the Ross Sea region

   Abstract:  The toothfish fishery in the Ross Sea region (CCAMLR Subareas 881 and 882) has been ... less). In this paper we summarise the current available fisheries and biological information for skates ... in the Ross Sea Region, including the data collected in the two “Year of the Skate” fishing seasons ... in 2008/09 and 2009/10. The composition of the skate catch by species is uncertain; it is estimated ...

   Meeting Document : WG-FSA-10/25 : Auteur(s): S. Mormede and A. Dunn (New Zealand)

4. Analysis of maturity of Antarctic toothfish in the Amundsen Sea

   (Dissostichus mawsoni) reproductive system, caught by the longliner in the Amundsen Sea in February 2006 and ... (57.1%) in 2006 and IV stages of maturity (83.3 %) in 2007 and testes – the IV stage (55%) in 2007. In ... 2007 the oocytes in the ovaries of 16.7% investigated fish has reached the completed maturation and ... definitive size 6484·10-6m, therefore, Antarctic toothfish was ready to spawn in the Amundsen Sea in March ...

   Meeting Document : WG-FSA-10/50 : Auteur(s): S.V. Piyanova and A.F. Petrov (Russia)

5. Revised assessment models for Patagonian toothfish in research block C of Division 58.4.4, Ob & Lena Banks for the years 1989/1990 to 2012/13

   eleginoides in research block C in Division 58.4.4 b on the assumption of constant year class strength and no ... IUU fishing occurrence in the block. The five models are as follows: 1) catch at length model as ... parameters were not estimated in these models according to the recommendations in the last WG-FSA meeting. In ... proportion of maturity index with stage 2+ and incorporated in the models. The median MPD estimates of the ...

   Meeting Document : WG-SAM-14/15 : Auteur(s): K. Taki (Japan)

6. Phase-randomisation in an integrated assessment model for Antarctic krill

   parameters in alternative configurations of a model assessing the status and productivity of Antarctic krill ... (Euphausia superba, hereafter krill). We fixed the parameters that were not estimated in any given ... configuration at pre-specified values. The model was fitted to survey and fisheries data for krill in Subarea ... configurations. The numbers of parameters estimated in configurations that were able to obtain an invertible ...

   Meeting Document : WG-SAM-17/31 : Auteur(s): D. Kinzey, G.M. Watters and C.S. Reiss

7. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL

   Abstract:  This paper follows preliminary work in 2005 and early 2006 in developing an integrated ... assessment for Patagonian toothfish in Division 58.5.2. It focuses on developing an integrated assessment ... -binned mark-recapture data, can be incorporated into the model. Earlier difficulties in using CASAL have ... been resolved. The results presented here indicate a general downward bias in the expected recaptures ...

   Meeting Document : WG-FSA-06/64 : Auteur(s): A. Constable, S. Candy, T. Lamb and I. Ball (Australia)

8. Monitoring of relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, South Shetland Islands, in years 2000 to 2003

   has continued in Potter Cove from 2000 to 2003, covering a continuous sampling period of twenty years ... and in Harmony Cove, Nelson Island, in the austral summers from 2001 to 2003. The decline in trammel ... net catches of fjord fishes of the species Notothenia rossii and Gobionotothen gibberifrons in ... those found in the early 1980s. At Harmony Cove, the relative abundance of N. rossii showed an increase ...

   Meeting Document : WG-FSA-03/89 : Auteur(s): E. Barrera-Oro, E. Marschoff, R. Casaux and B. Gonzalez (Argentina)

9. Are penguins and seals in competition for Antarctic krill at South Georgia?

   chrysolophus) are sympatric top predators that occur in the Southern Ocean around South Georgia where they are ... , respectively, the main mammal and bird consumers of Antarctic krill (Euphausia superba). In recent years the ... krill of similar size ranges, dive to similar depths and are restricted in their foraging range at least ... while provisioning their offspring. In this study we test the hypothesis that the increased fur seal ...

   Meeting Document : WG-EMM-02/22 : Auteur(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, K. Reid, U.J. Staniland and A.S. Brierley (United Kingdom)

10. Predicting changes in the Antarctic krill Euphausia superba population at South Georgia

    Abstract:  Variability in the Southern Ocean is frequently reflected in changes in the abundance ... nature and consequences of changes in krill population dynamics that accompany l1uctuations in its ... the abundance and population structure of krill in 1998 and the consequences for predators. Consistent ... with model predictions, in 1998 there was a serial change in krill population structure, low krill ...

    Meeting Document : WG-EMM-99/37 : Auteur(s): K. Reid, K.E. Barlow, J.P. Croxall and R.I. Taylor (UnitedKingdom)

Pages