Resultados de la búsqueda
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MaxEnt reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia 1996–2000
Abstract: We present Maximum Entropy (MaxEnt) reconstructions of krill distribution and estimates ... of mean krill density within two survey boxes of dimensions 80 km x 100 km to the north east and ... north west of South Georgia. The reconstructions are generated from acoustic line transect survey data ... approximately 0.5 km intervals along transect for each of the ten 80 km transects in each box, providing about ...
Meeting Document : WG-EMM-02/36 : Autor(es): M.H. Wafy, A.S. Brierley, S.F. Gull and J.L. Watkins (United Kingdom)
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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 APRIL 2009, USING THE GENERALISED YIELD MODEL
short-term annual yield in the 2009/2010 CCAMLR season. This paper provides a preliminary assessment of ... Abstract: A survey of mackerel icefish, Champsocephalus gunnari, was undertaken in Division ... 58.5.2 in the vicinity of Heard Island in April 2009 to provide the information for an assessment of ... yield for the area of Division 58.5.2 to the west of 79o 20’ E using standard CCAMLR methods. The strong ...
Meeting Document : WG-FSA-09/33 : Autor(es): D.C. Welsford (Australia)
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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
-term annual yield in the 2008/2009 CCAMLR season. This paper provides a preliminary assessment of yield ... Abstract: A survey of mackerel icefish, Champsocephalus gunnari, was undertaken in Division ... 58.5.2 in the vicinity of Heard Island in July 2008 to provide the information for an assessment of short ... for the area of Division 58.5.2 to the west of 79o 20’ E using standard CCAMLR methods. The strong ...
Meeting Document : WG-FSA-08/56 : Autor(es): D.C. Welsford (Australia)
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DEVELOPMENT OF A SPATIALLY EXPLICIT AGE-STRUCTURED STATISTICAL CATCH-AT-AGE POPULATION DYNAMICS MODEL FOR MODELLING MOVEMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA
a preliminary development version of this model to Antarctic toothfish in the Ross Sea as an age and ... numbers of areas, and is implemented as a discrete time-step state-space model that represents a cohort ... product of a set of preference functions that are based on known attributes of spatial location. SPM was ... designed to be flexible, allow for the estimation of both population and movement parameters based on local ...
Meeting Document : WG-SAM-08/14 : Autor(es): A. Dunn and S. Rasmussen (New Zealand)
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Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 through 1995
Abstract: Analysis of seasonal sea ice cover of a 1,250,000 km2 area off the northwestern side of ... multiple years is apparent. Annual curves of sea ice cover were integrated over time to produce an annual ... index of sea ice cover in units of 106 km2-months. Author(s): Hewitt, R.P. Title: Areal and seasonal ... extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 through 1995 Approval ...
Meeting Document : WG-EMM-96/24 : Autor(es): Hewitt, R.P.
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CPUE, net towing depth and body length of krill during the winter operation of Japanese krill fishery around South Georgia
Abstract: Monthly CPUEs during winter operation of Japanese krill trawlers around South Georgia ... were calculated. The range of CPUE values in 1991 season (poor year of krill) was comparable to the ... range of summer operation around Elephant Island and Livingston Island. Vertical distribution presumed ... season might be deeper than the summer season. Interannual variability of vertical distribution was also ...
Meeting Document : WG-EMM-96/51 : Autor(es): Kawaguchi, S., Ichii, T., Naganobu, M.
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An assessment of the conservation status of albatrosses
Abstract: The conservation status of albatrosses has been re-evaluated using the recent suggested ... taxonomic revisions of albatrosses and the new IUCN criteria for identification of threatened taxa. The ... evaluations of threat status and categories were prepared by independent albatross specialists before being ... highest proportion of threatened species in any bird family that comprises more than a single species. Of ...
Meeting Document : WG-FSA-97/59 : Autor(es): Croxall, J.P., Gales, R.
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An assessment of the impact of krill fishery on penguins in the South Shetlands
intensity to the shelf and slope of Livingston or Elephant Island. In contrast, the food consumption by ... . Estimated krill biomass varies considerably within the favorite fishing areas due to the movement of krill ... into and out of the area, but high krill biomass (100-1000 x103t) usually existed there. Compared with ... the amount of biomass (100-1000 x10 3t) and the degree of its variability (the order of 100 x10 3t/10 ...
Meeting Document : WG-KRILL-93/07 : Autor(es): T. Ichii, M. Naganobu and T. Ogishima (Japan)
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Characteristics of oceanic structure in the waters around the South Shetland Islands of the Antarctic ocean between December 1990 and February 1991: outstanding coastal upwelling?
Abstract: The sixth Antarctic survey cruise of R/V Kaiyo Maru was carried out in waters around ... the Shouth Shetland Islands. where are known as the fishing grounds of krill, during the 1990-91 ... into operation In the same area after an interval of 40 days. The more characteristic change was ... clearly recognized in the waters of the insular shelf from the first leg to the second leg. The Antarctic ...
Meeting Document : WG-KRILL-92/24 : Autor(es): M. Naganobu, T. Katayama, T. Ichii, H. Ishii and K. Nasu (Japan)
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Exploratory longline fishing around the Kerguelen Islands (Division 58.5.1). Description of the fishing effort; catchability and target size of Dissostichus eleginoides
fishing over the western shelf break of the Kerguelen shelf (Division 58.5.1). Scientific monitoring of ... fishing carried out by one of these longliners has allowed a description of fishing methods to be made ... . Bottom longlines are generally used at depths of 400 to 600 m. The mainline (1 to 2 miles long) carries ... by trawlers. The vessel is equipped with an automatic longline baiter which has an efficiency of ...
Meeting Document : WG-FSA-92/31 Rev. 1 : Autor(es): G. Duhamel (France)