Résultats de la recherche

1. Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts

   krill fishery data for understanding reasons of this ‘high CPUE’ regime. The authors present the ... analysis of spatial- temporal variability of krill fishery based on CPUE trends, trawling duration, catch ... become the reason for the changes in sea ice locations and krill abundance and distribution affecting ... observed in long-term fishery. We suggest that information on variability of krill fishable biomass ...

   Meeting Document : WG-EMM-14/21 : Auteur(s): S. Kasatkina and P. Gasyukov (Russia)

2. An assessment of the use of ocean gliders to undertake acoustic measurements of zooplankton: the distribution and density of Antarctic krill in the Weddell Sea

   the distribution of Antarctic krill (Euphausia superba). During the glider missions, a research vessel ... taken to validate acoustic targets and parameterize acoustic models. Krill targets were identified using ... a thresholded schools analysis technique (SHAPES), and acoustic data were converted to krill density ... density estimates by up to 8-fold. Glider-based, echo-sounder–derived krill density profiles for the two ...

   Meeting Document : WG-EMM-14/P02 : Auteur(s): D. Guihen, S. Fielding, E. Murphy, K. Heywood and G. Griffiths

3. Estimating future krill catches that meet the CCAMLR and alternative decision rules for FAO Subarea 48.1 using an integrated assessment model

   Abstract:  An integrated assessment model for Antarctic krill in FAO Subarea 48.1 that ... incorporates catch and length-composition data from the krill fishery with biomass indices and length ... estimate the effects of the fishery on the krill population. The model estimates parameters representing ... krill population biology and the fishery during the period with data (1976 to 2014 in these models) and ...

   Meeting Document : WG-EMM-15/51 Rev. 1 : Auteur(s): D. Kinzey, G.M. Watters and C.S. Reiss (USA)

4. Distribution and size-age composition of Antarctic krill in the South Orkney Islands region (CCAMLR Subarea 48.2)

   Abstract:  This paper describes distribution and size-age composition of Antarctic krill ... /2009 and 2009/2010 seasons. All age cohorts of krill passed spawning during the season 2008/2009, while ... in anomalous cold 2009/2010 season significant proportion of krill of cohort 2+ skipped spawning ... . Individuals of Antarctic krill in age 1+ were absent in catches in both 2008/2009 and 2009/2010 seasons ...

   Meeting Document : WG-EMM-10/16 : Auteur(s): D.O. Sologub and A.V. Remeslo (Russia)

5. Estimating Antarctic krill density from multi-beam observations using distance sampling methods

   processing of acoustic data from fishing vessels.  Some krill fishing vessels are equipped with scanning or ... sampling theory- that provides a general means for estimating krill density and biomass from vertically ... constraints of krill target strength models, acoustic instrument stability, and survey design allow the use of ... data observed with horizontally oriented multi-beam and scanning sonars to contribute to krill ...

   Meeting Document : SG-ASAM-12/05 : Auteur(s): M.J. Cox (Australia)

6. Ecosystem conservation and the race to krill

   Abstract:  CCAMLR has been managing the krill fishery without sufficient measures needed to meet ... improvements in the management of Antarctic krill fisheries, including establishing feedback management ... procedures, requiring 100% scientific observer coverage on board krill vessels, and implementing further ... protective measures to prevent excessive concentration of krill fishing in coastal areas close to predator ...

   Meeting Document : CCAMLR-XXXIV/BG/28 Rev. 1 : Auteur(s): Submitted by ASOC

7. Surface water masses, primary production, krill distribution and predator foraging in the vicinity of Elephant Island during the 1989-90 austral summer

   primary productivity, the distribution and demography of krill, and the foraging patterns of krill ... identified as the western end of the Weddell-Scotia Confluence. Krill abundance increased approximately 5 ... immigration from east of the study area. Krill sampled throughout the observation period were reproductively ... February. Krill composed 99% of the diet of chinstrap penguins and over 80% of the diet of fur seals ...

   Meeting Document : WG-CEMP-90/11 : Auteur(s): A.F. Amos, J.L. Bengtson, O. Holm-Hansen, V.J. Loeb, M.C. Macaulay and J.H. Wormuth (USA)

8. An illustrative management procedure for exploring dynamic feedback in krill catch limit allocations among small-scale management units

   subdivision of the precautionary catch limit for krill among 15 small-scale management units (SSMUs) in the ... subdivide the krill catch between SSMUs. Different MPs are then simulation tested with their performances ... reducing the abundances of predators (and krill) below certain levels, as well as the variability in future ... average krill catches per SSMU associated with each MP. The key assumption made here is that data will be ...

   Meeting Document : WG-EMM-06/28 : Auteur(s): É. Plagányi and D. Butterworth (South Africa)

9. Relationships between oceanographic environment and distribution of krill and baleen whales in the Ross Sea and adjacent waters, Antarctica in 2004/05

   geographical distribution of the main biological prey and predator populations such as krill including other ... below are MTEM-200 values).- Antarctic krill mainly distributed in the waters between 0 to-1℃ of MTEM ... extended in the waters less than-1℃ of the Shelf Water (SW) zone. Ice krill distributed in the waters ... . The interaction between distributions of krill and baleen whales with MTEM-200 could give quantitative ...

   Meeting Document : WG-EMM-08/31 : Auteur(s): M. Naganobu, S. Nishiwaki, H. Yasuma, R. Matsukura, Y. Takao, K. Taki, T. Hayashi, Y. Watanabe, T. Yabuki, Y. Yoda, Y. Noiri, M. Kuga, K. Yoshikawa, N. Kokubun, H. Murase, K. Matsuoka, T. Iwami and K. Ito (Japan)

10. Uncertainty in acoustic surveys of Antarctic krill

    Abstract:  Studied were four primary sources of uncertainty in krill density estimates from ... krill TS was then investigated through in situ measurements (Hewitt and Demer, 1991). The TS data ... krill TS estimates were conservatively estimated to be 0 dB and ±4.0 dB, respectively. The uncertainty ... studies indicated that scattering from S. thompsoni contributed to a positive bias in the krill density ...

    Meeting Document : WG-EMM-95/72 : Auteur(s): Demer, D.A.

Pages