Résultats de la recherche

1. A RE-APPRAISAL OF THE TOTAL BIOMASS AND ANNUAL PRODUCTION OF ANTARCTIC KRILL

   production are still very uncertain. Recently, circumpolar krill databases, combined with growth models and ... standardised net sampling methodology but they integrate over the period 1926-2004, during which krill ... abundance has fluctuated. To estimate krill biomass at the end of last century we combined the KRILLBASE map ... of relative krill density around Antarctica with the most recent, acoustics-derived, value for the ...

   Meeting Document : WG-EMM-08/17 : Auteur(s): A. Atkinson (United Kingdom), V. Siegel (Germany), E.A. Pakhomov (South Africa), M.J. Jessopp (United Kingdom) and V. Loeb (USA)

2. Results of a hydroacoustic survey of Antarctic krill populations in CCAMLR Division 58.4.1 carried out in January to April 1996

   Abstract:  In January-March 1996 a hydroacoustic survey for Antarctic krill was conducted in ... CCAMLR Division 58.4.1 for the purposes of estimating overall biomass (B0). The krill biomass in the area ... surveyed (873,000 km2) was estimated to be 6.67 million tonnes with a CV of 27%. Krill were more abundant ... in the west of the survey area 800-1200E than in the 120°-150°E region. The majority of the krill ...

   Meeting Document : WG-EMM-96/28 : Auteur(s): Higginbottom, I., de la Mare, W., Pauly, T., Nicol, S.

3. REPORT ON TRANSHIPMENT OF KRILL IN 2009

   Abstract:  Report on transhipment of krill in 2009 Delegation of Japan Abstract: According to the ... Conservation Measure 10-09 (2009), Japan reports on krill transhipment activities by its krill fishing vessel ... submits the attached report on transshipment activities by its krill fishing vessel in CCAMLR Convention ... ):  Delegation of Japan Title:  REPORT ON TRANSHIPMENT OF KRILL IN 2009 Approval:  Approved ...

   Meeting Document : CCAMLR-XXIX/BG/05 : Auteur(s): Delegation of Japan

4. A RE-ANALYSIS AND UPDATE OF THE ANTARCTIC KRILL BIOMASS IN THE SOUTH SHETLAND ISLANDS, THROUGH 2011

   Abstract:  Acoustically based estimates of Antarctic krill (Euphausia superba) biomass, and net ... -based estimates of krill density and recruitment are recalculated for the years 1996 through 2011 ... . The time series of acoustic biomass indicate that krill have varied by more than an order of magnitude ... based data show that 2011 was a year of good recruitment, following two years of low recruitment. Krill ...

   Meeting Document : WG-EMM-11/26 : Auteur(s): A. Cossio, C. Reiss and R. Driscoll (USA)

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

   consumers of Antarctic krill. In recent years the population of fur seals has increased whereas that of ... macaroni penguins has declined. Both species feed on krill of similar size ranges, dive to similar depths ... prevalence of krill in the diet of the two predators differed with less krill in the diet of macaroni ... penguins than Antarctic fur seals in recent years. Krill in the diet of macaroni penguins was significantly ...

   Meeting Document : WG-EMM-01/22 : Auteur(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, I.J. Staniland, K. Reid and A.S. Brierley (United Kingdom)

6. A revised assessment of the impact of the krill fishery on penguins in the South Shetlands

   krill (Euphausia superba) fishery and penguins (WG-Krill-93/7). Main fishing areas were confined to the ... with areas of high krill abundance. The overlap between trawling depth and foraging dive depth of ... penguins was also insignificant. Furthermore, less similarity between krill caught by trawlers and those ... fishery and penguins. Krill biomass was estimated to be as large as 200-1500 xl03 tonnes within the ...

   Meeting Document : WG-Joint-94/17 : Auteur(s): T. Ichii, M. Naganobu and T. Ogishima (Japan)

7. 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)

8. 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

9. 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)

10. Krill consumption by crabeater seals in CCAMLR Divisions 58.4.1 and 58.4.2

    Abstract:  As a contribution to the work program of WG-EMM-STAPP to estimate krill consumption by ... predators, this paper presents estimates of krill consumption by crabeater seals off East Antarctica between ... 64ºE-150ºE, which includes all of Division 58.4.1 and part of Division 58.4.2. Krill consumption by ... . This represents approximately 20% of the krill biomass estimated from acoustic surveys. Author(s):  C ...

    Meeting Document : WG-EMM-16/66 : Auteur(s): C. Southwell, J. Forcada, L. Emmerson, A. Constable, S. Kawaguchi and P. Trathan

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