Resultados de la búsqueda
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Preliminary assessment of Patagonian toothfish in Subarea 48.3
outputs from the 2-fleet and 3-fleet assessments are very similar with the exception of the ... terminal assessment year continues to be estimated at around 54% of virgin biomass, consistent with the ... CCAMLR harvest control rule. The 3-fleet assessment model provides slightly improved fits to CPUE data ... recruitment.YCS estimates which differ markedly in 1990 but follow similar trends in all other years. Recruitment ...
Meeting Document : WG-FSA-13/30 : Autor(es): R. Scott (United Kingdom)
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An 8-year cycle in krill biomass density inferred from acoustic surveys conducted in the vicinity of the South Shetland Islands during the austral summers of 1991/1992 through 2001/2002
years and indications that ice cover in the winter of 2002 is seasonally early and extensive. Author(s ... , comparisons with the proportion of juvenile krill in simultaneous net samples suggest that the changes in ... biomass density are consistent with apparent changes in reproductive success. A truncated Fourier series ... fit to the biomass density time series is dominated by an 8-year cycle and predicts an increase in ...
Meeting Document : WG-EMM-03/6 : Autor(es): R.P. Hewitt, D.A. Demer and J.H. Emery (USA)
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Changing status of three notothenioid fish at the South Shetland Islands (1983–2016) after impacts of the 1970–80s commercial fishery
Abstract: Owing to commercial fishing during the late 1970s/early 1980s, targeted notothenioid ... started in 1983. Our inshore results were consistent with those from offshore bottom trawl sampling in ... (3) a high abundance of N. coriiceps. Reasons for lack of recovery in G. gibberifrons remain obscure ... with trends reported in seabirds that feed on juveniles of these notothenioids: decrease in the areas ...
Meeting Document : WG-FSA-17/P01 : Autor(es): E. Barrera-Oro, E. Marschoff and D. Ainley
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Scientific justification for a marine protected area designation around the Balleny Islands to protect ecosystem structure and function in the Ross Sea region, Antarctica: progress report
can be aligned with both the CCAMLR ecosystem-wide conservation objectives and the values found in ... Article 3 of Annex V to the Protocol on Environmental Protection to the Antarctic Treaty. This paper’s ... includes the only known habitat in the region for juvenile toothfish, and perhaps also for early ... against unpredictable and potentially negative ecosystem impacts, consistent with the conservation mandate ...
Meeting Document : SC-CAMLR-XXIV/BG/25 : Autor(es): Delegation of New Zealand
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Comparative studies on the biological and acoustical properties of krill aggregations (Euphausia superba Dana) samples during the XIII Italian Expedition to the Ross Sea (December 1997–January 1998)
Abstract: During the XIII Italian Expedition to the Ross Sea in late spring and early summer ... processing acoustic data; (3) to analyse the structure of Euphausia superba population on the basis of ... homogeneous. The maturity stage of krill in general increase with decreasing of latitude (from 76° to 71°S ... (around 9%less) to the mean catch values; (3) The numerical abundance of the krill, estimated by the fluid ...
Meeting Document : WG-EMM-00/39 : Autor(es): M. Azzali, J. Kalinoswki, G. Lanciani and I. Leonori (Italy)
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Report on fishery and scientific activity of Ukraine in the Antarctic in 1993/94
in subarea 48.2 from 01.03.1994 to 10.04.1994 and from the middle of the second ten-day period of May ... to the middle of the first t en-day period of June. GENERAL PETROV worked from 21.04 to 17.05 in ... of their stocks, as well as their interrelations with external environmental conditions. To reveal ...
Meeting Document : SC-CAMLR-XIII/BG/12 : Autor(es): Observer (Ukraine)
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Development of foraging behaviour and evidence of extended parental care in the gentoo penguin (Pygoscelis papua)
sea. Trip duration increased significantly with chick age as trips to sea becoming more similar to ... trip to sea and its final dispersal from the breeding colony. Our study was conducted at a colony of ... with extended parental provisioning, behaviours not observed in other Pygoscelis species. Chicks took ... their first trip to sea at a mean age of 70 days of age, before finally departing the colony at an ...
Meeting Document : WG-EMM-06/8 : Autor(es): M. Polito and W.Z. Trivelpiece (USA)
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
more than 3 years, these are: Beached Marine Debris: Chile (Cape Shirreff, Livingston Island, South ... Database contains data from 11 sites, all within the Area 48 of which there are 3 sites that have data form ... ) Debris Associated with Seabird Colonies: United Kingdom (Bird Island 1993 – present) Marine Mammal ... of marine debris found in seabird colonies at Bird Island has continually increased, with fishing ...
Meeting Document : SC-CAMLR-XXII/BG/25 : Autor(es): Secretariat
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Annual variation in the timing of reproduction in Antarctic fur seals (Arctocephalus gazella) at Bird Island, South Georgia
, which is less synchronous within years than female arrival, was significantly later in 1987 than in any ... significantly later in 1984 and 1987 than in 1983, 1985 or 1986. The late arrival of both males and females in ... other year. Female arrival, estimated by pup birth date where necessary, was highly synchronous: it ...
Meeting Document : WG-CEMP-90/39 : Autor(es): C.D. Duck (United Kingdom)
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Monitoring a marine ecosystem using responses of upper trophic level predators
South Georgia (Southern Ocean) using up to 27 variables measured over 22 years from 3 upper trophic ... followed by variables representing diet. 4. There were 3 years in which the CSI showed extreme and ... . Individual variables had widely varying influence upon the CSI but, in general, those with longer time series ... had the greatest influence. 3. Principal components analysis showed that variables representing ...
Meeting Document : WG-EMM-01/25 : Autor(es): I.L. Boyd and A.W.A. Murray (United Kingdom)