Resultados de la búsqueda
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Use of current velocity data from fram to investigate the large scale transport of krill in the Scotia Sea
Abstract: Current velocity data from a single time realisation of the FRAM model are presented ... for particular areas of the Scotia Sea. The regions are based on the CCAMLR sub-areas and also include ... boundaries over the upper 250m of the water column. These have been combined with estimates of krill density ... and standing stocks to consider the large scale flux of krill through the regions and estimate ...
Meeting Document : WS-Flux-94/05 : Autor(es): E.J. Murphy (United Kingdom)
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Assessment of fishable krill biomass on the basis of the acoustic surveys results using geostatistical methods
Abstract: ABSTRACT Applicability of geostatistical methods in processing the acoustic fields of ... krill density based on the acoustic survey data is demonstrated. The results obtained indicate ... usefulness of these methods in studying the structure of krill density field for biomass assessment in ... compliance with different thresholds of their fishery importance. The structure of krill density field in ...
Meeting Document : WG-SAM-10/07 Rev. 1 : Autor(es): S.M. Kasatkina and P.S. Gasyukov (Russia)
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A critical re-examination of the evidence for a possible dependence of Weddell seals (Leptonychotes weddellii) on Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea, Antarctica
Abstract: There is presently debate over the degree to which the fishery for Antarctic toothfish ... (Dissostichus mawsoni; ‘toothfish’) in the Ross Sea may affect the ecological viability of top predators such as ... the assumptions underlying application of stable isotope methodology to Weddell seals, and estimate ... the potential contribution of toothfish to the diet of Weddell seals using an isotope mixing model ...
Meeting Document : WG-EMM-13/28 : Autor(es): R. Eisert, M.H. Pinkerton (New Zealand), S.D. Newsome and O.T. Oftedal (USA)
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Quantifying the impacts of ice on demersal longlining in CCAMLR Subarea 88.1 with updated information on the 2014/15 season
Abstract: The effect of sea ice is acknowledged as a major influence on fishing operations in ... fisheries research and management. A retrospective analysis over a 15 year period up to the 2013/14 season ... was presented in WG-FSA-14/55 to quantify the level of impact that ice conditions have on fishing by ... creating an annual fishability index. We update the analysis for the 2015 season, a challenging ice year ...
Meeting Document : WG-FSA-15/35 : Autor(es): J.M. Fenaughty and S.J. Parker (New Zealand)
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Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2014–15
Abstract: We provide an update of the descriptive analyses of the toothfish tagging programme in ... Subareas 88.1 and 88.2 through the 2015 season. A total of 44 827 Antarctic toothfish have been released ... years, most vessels have achieved or exceeded the required tagging rate of one toothfish per tonne of ... catch in the Ross Sea region. Tag recapture data showed that most fish are recaptured only a short ...
Meeting Document : WG-FSA-15/37 : Autor(es): S.J. Parker and S. Mormede (New Zealand)
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Preliminary results on the distribution and abundance of Antarctic krill (Euphausia superba) in the Weddell Sea, Southern Ocean
Abstract: Hydroacoustic data were collected to study the distribution and abundance of Antarctic ... krill relative to their predators in the Southern Ocean during annual logistic summer trips and ... dedicated research winter trips to Antarctica on board the South African RV SA Agulhas II. The 38, 120 and ... 200 kHz transducers mounted on the drop keel of the research vessel were used to collect acoustic data ...
Meeting Document : SG-ASAM-18/09 : Autor(es): F.W. Shabangu
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A RE-ANALYSIS AND UPDATE OF THE ANTARCTIC KRILL BIOMASS IN THE SOUTH SHETLAND ISLANDS, THROUGH 2011
-based estimates of krill density and recruitment are recalculated for the years 1996 through 2011 ... . Recent changes in the acoustic methodology and target strength models are the basis for the recalculation ... . The time series of acoustic biomass indicate that krill have varied by more than an order of magnitude ... over this time period. Current estimates for the South Shetland Islands region are 3.6, 1.9 and 1.35 ...
Meeting Document : WG-EMM-11/26 : Autor(es): A. Cossio, C. Reiss and R. Driscoll (USA)
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UPDATED KRILL RECRUITMENT DATA FOR THE ELEPHANT ISLAND REGION OF THE SOUTH SHETLAND ISLANDS, ANTARCTICA; 2002-2008
Abstract: The proportional krill recruitment index is updated from 2002 to present using data ... from the US AMLR surveys around Elephant Island, Antarctica. Proportional recruitment indices were ... derived from the CMIX procedure, and were also derived as a proportion of the <30 mm length class for ... , with low recruitment occurring during the intervening years. Significant differences in the ...
Meeting Document : WG-EMM-08/41 : Autor(es): C. Reiss (USA)
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PRELIMINARY ASSESSMENT OF MACKEREL ICEFISH, CHAMPSOCEPHALUS GUNNARI, IN THE VICINITY OF HEARD ISLAND AND MCDONALD ISLANDS (DIVISION 58.5.2), BASED ON A SURVEY IN JULY 2008, USING THE GENERALISED YIELD MODEL
58.5.2 in the vicinity of Heard Island in July 2008 to provide the information for an assessment of short ... -term annual yield in the 2008/2009 CCAMLR season. This paper provides a preliminary assessment of yield ... for the area of Division 58.5.2 to the west of 79o 20’ E using standard CCAMLR methods. The strong ... year class detected in last year’s survey is now fully recruited as the 2+ cohort, and dominates the ...
Meeting Document : WG-FSA-08/56 : Autor(es): D.C. Welsford (Australia)
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A methodological proposal to monitor changes in coastal fish populations by the analysis of pellets of the blue-eyed shag Phalacrocorax atriceps
. The methodology considered is based in the analysis of regurgitated pellets of the blue-eyed shag ... Phalacrocorax atriceps. The fundaments of the proposal as well as the methods tested and the steps followed are ... changes in coastal fish populations by the analysis of pellets of the blue-eyed shag Phalacrocorax ...
Meeting Document : WG-EMM-95/84 : Autor(es): Barrera-Oro, E., Casaux, R.