Resultados de la búsqueda
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Assessing the feasibility of regional surveys of land-based predator abundance in the Southern Ocean: a framework for decision making and planning
Abstract: In 2000 WG-EMM discussed the need for region-wide and circum-Antarctic estimates of ... abundance of land-based predators. At the 2001 meeting of WG-EMM it was proposed that a workshop be held in ... 2002 to assess the feasibility of such broad-scale surveys, and a small intersessional correspondence ... group was formed to scope out the terms of reference and method of operation for the workshop. The ...
Meeting Document : WG-EMM-02/45 : Autor(es): C. Southwell (Australia)
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Assessment of yield and status of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean: implications for managing by-catch in CCAMLR fisheries
Abstract: This paper assesses the status and abundance of M. carinatus on BANZARE Bank ... Model (GYM) used previously by the CCAMLR Working Group on Fish Stock Assessment. Estimates of ... elsewhere in the world. The trawl survey data was used to calculate estimates of biomass and density for the ... area and showed that M. carinatus did not appear to be aggregated over any part of BANZARE Bank. The ...
Meeting Document : WG-FSA-99/69 : Autor(es): E.M. van Wijk, A.J. Constable, R. Williams and T. Lamb (Australia)
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UPDATE OF THE INTEGRATED STOCK ASSESSMENT FOR THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS USING CATCH-AT-AGE DATA AND TWO YEARS OF SURVEY ABUNDANCE-AT-AGE DATA
Abstract: The integrated assessment of Patagonian toothfish, Dissostichus eleginoides, for the ... combination of fishery and year had available at least 50 aged fish. For the trawl fisheries that were divided ... parameter values were logically applied to both types of data. For 2006 and 2007 random stratified trawl ... the coefficient of variation (CV) for the abundance-at-age, assuming a lognormal distribution, each ...
Meeting Document : WG-SAM-09/09 : Autor(es): S.G. Candy (Australia)
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ADDRESSING UNCERTAINTY OVER THE IMPORTANCE OF ANTARCTIC TOOTHFISH AS PREY OF SEALS AND WHALES IN THE SOUTHERN ROSS SEA: A REVIEW
Abstract: An uncertainty heretofore has existed over the importance of Antarctic toothfish ... (Dissostichus mawsoni) as prey of top predators in the Ross Sea. We reviewed the literature to assess the ... relative weight that should be given to direct, observational evidence of predator diet composition, as ... opposed to indirect evidence from scat and biochemical analysis. As a result of this assessment, it is ...
Meeting Document : WG-EMM-08/22 : Autor(es): D. Ainley and D. Siniff (USA)
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Calculation of indices of sea-ice concentration using digital images from the National Snow and Ice Data Centre
Abstract: A method is described for calculating indices of sea ice distribution from digital data ... distributed by the National Snow and Ice Data Centre, Colorado, USA. Data consist of an image of the Antarctic ... , made up of 312x332 pixels, each having a dimension of 25x25km, for every day in the year. Primary data ... of the distance of sea ice from CEMP sites, the northerly position of the sea ice edge, and the ...
Meeting Document : WG-EMM-95/11 : Autor(es): Agnew, D.J.
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Fish in the diet of the blue-eyed shag Phalacrocorax atriceps at the South Shetland Islands: six years of monitoring studies
Abstract: In this document we inform on the results of six years monitoring changes in the diet ... of the Blue-eyed Shag Phalacrocorax atriceps as reflected by the analysis of regurgitated pellets ... collected at two localities of the South Shetland Islands. The comments are mainly focused on Gobionotothen ... gibberifrons and Notothenia rossii, species of particular interest for CCAMLR. Notothenia rossii appeared in ...
Meeting Document : WG-EMM-96/31 : Autor(es): Barrera-Oro, E., Casaux, R.
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Incidental mortality of seabirds associated with longline fishing in Subarea 48.3 – preliminary results of scientific observations onboard the Chilean longliner, Puerto Ballena, from March to May 1996
Abstract: Estimates of the number of seabirds taken incidentally in longline fisheries on ... observations on the by-catch of seabirds during a cruise of the Chilean longliner 'Puerto Ballena' in ... Statistical Subarea 48.3. A total of 118 dead black-browed albatrosses, 3 dead grey-headed albatrosses, 46 ... setting of lines had been restricted to nighttime as required in order to comply with Conservation Measure ...
Meeting Document : WG-FSA-96/31 : Autor(es): Selling, J., Kock, K.-H.
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Fishes caught along with the Antarctic krill in the vicinity of the South Shetland Islands during the austral summer months of 1994
Abstract: Observations on abundance of by-catch fishes were made during the austral summer months ... of 1994 (from January 12 to February 18) on board F/V Niitaka Maru in the north of the South Shetland ... Islands. Among 99 net hauls examined, a total of 77 specimens of fishes belonging to 13 species were found ... also secondary abundant. To compare abundance of each fish species, the index of its occurrence in ...
Meeting Document : WG-Krill-94/25 : Autor(es): T. Iwami (Japan)
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Acoustic visualization of the three-dimensional prey field of foraging chinstrap penguins
Abstract: Predator-prey interactions play an important role in determining the dynamics of ... ecosystems. Recently, concerns have arisen due to the commercial harvesting of Euphausia superba, the ... these concerns because of problems associated with determining the availability of krill to their ... -dimensional distribution of krill within a 1852 X 1852 X 100 m volume of ocean. Our study revealed the ...
Meeting Document : WG-Joint-94/12 : Autor(es): J.E. Zamon, C.H. Greene, E. Meir, D.A. Demer, R.P. Hewitt and S. Sexton (USA)
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Ross Sea Biodiversity, Part I: validation of the 2007 CCAMLR Bioregionalisation Workshop results towards including the Ross Sea in a representative network of marine protected areas in the Southern Ocean
Abstract: This report provides the scientific basis, validating the results of the CCAMLR ... Bioregionalization Workshop (2007) as well as the report of ASOC (2010), for identifying the Ross Sea as one of 11 ... areas deserving close scrutiny for inclusion in a network of marine protected areas. CCAMLR (2007 ... ) identified the Ross Sea as an area of high biodiversity on the basis of its high physical heterogeneity; ASOC ...
Meeting Document : WG-EMM-10/11 : Autor(es): D.G. Ainley, G. Ballard and J. Weller (USA)