Résultats de la recherche
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Additional data on anti-Brucella antibodies in Arctocephalus gazella from Cape Shirreff, Livingston Island, Antarctica
detected in one sample with the RB test, and in five of the 86 samples (5.8%) using the c-ELISA test. These ... results present serological evidence of Brucella infection in A. gazella. We suggest the utility of extra ... marine mammals. We highlight the importance of evaluating in the CCAMLR Working Group on Ecosystem ... Shirreff, Livingston Island, Antarctica Abstract / Description: The first instance of anti-Brucella ... instance of anti-Bvz~celln antibodies in the Southern Hemisphere was recorded in two pinniped species from ... Bvucelln spp. were detected in one sample with the RB test, and in five of the 86 samples (5.8%) using the ... is probably found worldwide in marine mammals. We highlight the importance of evaluating in the ... instance of anti-Bn~cella antibodies in the Southern Hemisphere was recorded in two pinniped species from ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 147–154 : Auteur(s): Blank, O., P. Retamal, P. Abalos and D. Torres
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USING ECOSYSTEM STRUCTURE TO IDENTIFY FINER-SCALE SSMUS FOR OCEANIC AREAS IN SUBAREAS 48.1 TO 48.3
Abstract: One of the main issues in the management of the krill fishery is finding a spatial ... initial framework of small scale management units (SSMUs) in subareas 48.1 to 48.4 based on the spatial ... consumption of krill by predators and 10% of the cumulative total fishery catch in the three subareas (48.1 to ... 48.3) where the fishery operates. There is ample evidence of structure in oceanic areas from both ...
Meeting Document : WG-EMM-11/18 : Auteur(s): S.L. Hill and J. Silk (UK)
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Are penguins and seals in competition for Antarctic krill at South Georgia?
, respectively, the main mammal and bird consumers of Antarctic krill (Euphausia superba). In recent years the ... population at South Georgia may have resulted in greater competition for the prey of macaroni penguins ... 1989 and 2000. Foraging ranges of the two species showed considerable overlap in both years but the ... species was very similar, but over the last 12 years the prevalence of krill in their diets has diverged ...
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)
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Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01
acoustic surveys of Antarctic krill (Euphausia superba) were conducted around South Georgia in the 2000/01 ... March 2001 (late-season). The surveys were the first in a newly planned five-year series of observations ... in the eastern box (80.4 g m-2). Analysis of transect data obtained in the western box in the ... survey box off the central north coast of South Georgia in midseason revealed a krill density of 47.2 g m ... ). Analysis of transect data obtained in the western box in the mid- season survey revealed no signifi cant ... the eastern and western areas. The size structure of the krill in the central region also refl ected ... southwest of South Georgia was 32.1 g m-2 in mid-season. By March, krill density in the western survey ... -shot’ acoustic survey data have allowed. This is a crucial step in the elucidation of response ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Auteur(s): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst
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GIS ‘ChartMaster’ for aquatic living resources research in Antarctic
for studying aquatic living resources in the Antarctic waters: The Chart of possible catches of ... according to the catch results of the Russian fishing vessels in the Antarctic area (from 71º26.4’ S to ... computed by data of the hydroacoustic survey carried out by the Russian R/V «Atlantida» in February-March ... Abstract: Geographic Information Systems (GIS) find increasing application in different fields of ...
Meeting Document : WG-SAM-13/04 : Auteur(s): V.A. Bizikov, S.M. Goncharov, A.V. Polyakov, S.B. Popov and A.F. Petrov (Russia)
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Modelling catch and effort data using generalised linear models with random cruise and stratum-by-year effects: trawl fishery for Dissostichus eleginoides in CAMLR Area 58.5.2
parameter values was presented in WG-FSA-SAM 03-12 using Dissostichus eleginoides in Subarea 48.3 of the ... random effect term in the GLMM. Statistical methods are presented for examining the validity of ... when the S x Y term is included in the GLMM as a fixed effect. Defining an areal extent of each stratum ... stratum. Including the stratum term as fixed simply results in uniform scaling of the CPUE series as is ...
Meeting Document : WG-FSA-03/34 : Auteur(s): S.G. Candy (Australia)
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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 ... the static allocation options, to ensure that the likely performances of these MPs in terms of low ... reducing the abundances of predators (and krill) below certain levels, as well as the variability in future ... regularly available in future to monitor the impact/s of different krill catch limits. For illustrative ...
Meeting Document : WG-EMM-06/28 : Auteur(s): É. Plagányi and D. Butterworth (South Africa)
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Do krill fisheries compete with macaroni penguins? Spatial overlap in prey consumption and krill catches during winter
far less than that among the various other species of krill predators that occur in the Scotia Sea ... , the macaroni penguin, and the krill fishery by examining the spatial overlap in prey consumption and ... period as this is the only time of year when spatio-temporal overlaps between macaroni penguin foraging ... and the krill fishery can occur. We tracked adult macaroni penguins from a colony in South Georgia ...
Meeting Document : WG-EMM-14/02 : Auteur(s): N. Ratcliffe, S.L. Hill, I.J. Staniland, R. Brown, S. Adlard, C. Horswill and P.N. Trathan (United Kingdom)
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Depletion-corrected average catch: a simple formula for estimating sustainable yields in data-poor situations
production, in the form of a “windfall ratio”. The DCAC is calculated as the sum of catches divided by the ... sum of the number of years in the catch series and this windfall ratio. Input information includes the ... sum of catches and associated number of years, the relative reduction in biomass during that period ... Abstract: The depletion-corrected average catch (DCAC) formula is an extension of the potential ...
Meeting Document : WG-SAM-11/P3 : Auteur(s): A.D. McCall
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Toothfish, skate and longline by-catch survey in Subarea 48.3
relevance to stock dynamics for all fish species in the area including by-catch species of the longline ... Abstract: This was the first deep-water trawl survey of the South Georgia Maritime Zone funded by ... the Government of South Georgia and the South Sandwich Islands (GSGSSI) as part of the South Georgia ... information on bycatch species of the longline fishery, particularly grenadiers (Macrourids) and Skates ...
Meeting Document : WG-FSA-03/15 : Auteur(s): M. Belchier, M. Collins, M. Endicott, I. Everson, S. Hawkins, T. Marlow, T. Mulvey and R. Paterson (United Kingdom)