Search results
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Research plan for the Spanish exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2: Update of stage 2 (2013/14 season) and preliminary results of stage 1 (2012/13 season) according to WG-SAM advice
Abstract: A revision of the research plan and preliminary results of the Spanish exploratory ... completed in each of the SSRU surveyed (58.4.1H and 58.4.1G). Three prospecting-phase clusters of sets did ... not reach the threshold to start the depletion. A new prospective estimation of the local biomass (B ... LOC) of the two localized areas where the depletion experiments were performed is done as well as an ...
Meeting Document : WG-FSA-13/15 : Author(s): R. Sarralde, L.J López Abellán and S. Barreiro (Spain)
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PRELIMINARY RESULTS OF THE EXPERIMENT ON DEFINITION OF ANTARCTIC KRILL MORTALITY RATE IN FISHERY
Abstract: Two successful experiments on definition of Antarctic krill mortality have been carried ... . Approximately 230 to 130 kg of krill are percolated and punched through per an hour of trawling if the average ... catch per an hour of trawling is about 8 tons and towing speed is 2.6-2.7 knots. The key parameters of ... trawling which influence the value of the Antarctic krill mortality rate are: the trawl configuration and ...
Meeting Document : WG-EMM-11/15 : Author(s): L. Pshenichnov and K. Vyshniakova (Ukraine)
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Preliminary results of age determination of the Dissostichus spp. from the longline catches in 48.2 Subarea (2015, SIMIIZ)
Abstract: Age determination of the Patagonian (Dissostichus eleginoides) and Antarctic toothfish ... the Ukrainian vessel “Simeiz” in the Northern part of Weddell Sea (statistical Subarea 48.2) in March ... 2015. 124 otolith pairs of Dissostichus mawsoni and 87 otolith pairs of Dissostichus eleginoides were ... sampled; one otolith from each pair was used for age determination. Preliminary results of age ...
Meeting Document : WG-FSA-15/46 : Author(s): Delegation of Ukraine
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Stable isotope analysis of Southern Ocean fish tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni)
to determine C and N stable isotope composition. Values of?15N and?13C suggested that a minimum of ... Atlantic, and sperm whales from the Gulf of Mexico. There was high variance in?15N and?13C values for each ... of the species sampled, on the order of 3-4 ‰ for?15N (which equates to one trophic level) and 4 ... ‰ for?13C (suggesting multiple primary sources of organic matter). For each species where sufficient ...
Meeting Document : WG-EMM-07/19 : Author(s): M.H. Pinkerton, S. Bury, S.M. Hanchet and D. Thompson (New Zealand)
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Population assessment of Patagonian toothfish in the north of Subarea 48.4 – 2010 update
Abstract: The target tagging rate of 5 fish per tonne was exceeded by both vessels, with 232 D ... . eleginoides tag recaptures in 2009/10, a total of 72 in all seasons; The length-frequency of 2009/10 captures ... is consistent with the theory that the bulk of the biomass is dominated by a small number of cohorts ... currently assumed for the 48.3 population CASAL estimates of D. eleginoides population size in the North of ...
Meeting Document : WG-FSA-10/39 : Author(s): J. Roberts and D. Agnew (UK)
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Interannual hydroclimate fluctuations of the Atlantic part of the Antarctic since 1970 to 2000
Abstract: Late in 1999 and early in 2000 there was observed a significant shifting of Falkland ... Current core towards the shelf and abnormally large number of icebergs on the South Georgia Island shelf ... . In this connection, retrospective hydrometeorological data on the areas of South-West Atlantic ... Antarctic were examined from 1970 to 2000 March. The analysis of atmospheric pressure average monthly fields ...
Meeting Document : WG-EMM-00/35 : Author(s): G. Chernega, I. Polischuk and P. Chernyshkov (Russia)
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INCOMPLETE SEARCH EFFORT AS A POTENTIAL SOURCE OF BIAS IN BROAD-SCALE ESTIMATES OF PENGUIN ABUNDANCE DERIVED FROM PUBLISHED COUNT DATA: A CASE STUDY FOR ADÉLIE PENGUINS IN EAST ANTARCTICA
m2 and within 500 m of the ocean) in the Australian Antarctic Territory (AAT) was mapped using a GIS ... , and the literature reviewed for evidence of the mapped habitat being searched for occupation by ... breeding Adélie penguins. The total area of potential breeding habitat was estimated to be close to 700 km2 ... . Definitive or reasonably strong evidence of search effort was found for 63% of all potential habitat sites ...
Meeting Document : WG-EMM-PSW-08/13 : Author(s): C. Southwell, D. Smith and A. Bender (Australia)
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Genetic structuring of Patagonian toothfish populations in the southwest Atlantic Ocean: the effect of the Antarctic Polar Front and deep-water troughs as barriers to genetic exchange
species with potential for high dispersal are of great interest, not only from an evolutionary standpoint ... differentiation among populations of the Patagonian toothfish around the Southern Ocean, indicating breakdown of ... structuring through analysis of microsatellite loci and restriction fragment length poymorphism (RFLP) of the ... mitochondrial ND2 gene and control region of the toothfish population in the SW Atlantic, allowing examination ...
Meeting Document : WG-FSA-04/21 : Author(s): P.W. Shaw, A.I. Arkhipkin and H. Al-Khairulla (United Kingdom)
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A comparison of geostatistical and random sample survey analyses of Antarctic krill acoustic data
Abstract: Data from the acoustic surveys of MV SA "Aghulas" and FRV "Walter Herwig ... geostatistical methods. Estimates of mean density (g m-2) of krill and their variances are compared with ... sampling theory. A further high-resolution geostatistical analysis of the MV SA "Aghulas" (ping ... -by-ping) data set of the density of each individual aggregation is also presented. These analyses ...
Meeting Document : WG-EMM-95/76 : Author(s): Murray, A.W.A.
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Background and criteria of establishment of Marine Protected Area (MPA) in the Weddell Sea
Abstract: Present work contains considerations and proposals of possible joint research of ... Russian and German scientists in the eastern part of the Weddell Sea. Data on potentially valuable for ... commercial fishing species in the eastern part of the Weddell Sea collected by German investigators in 1979 ... -1989 are also included, as well as results of Russian longline survey of Antarctic toothfish in 2013 ...
Meeting Document : WG-EMM-14/23 : Author(s): A.F. Petrov, V.A. Bizikov, K.V. Shust and E.F. Uryupova (Russia)