Resultados de la búsqueda
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophrys and D. chrysostoma at Campbell Island, New Zealand, 1942–96
Abstract: The numbers of Black-browed Albatrosses Diomedea melanophrys and Grey-headed ... Albatrosses D. chrysostoma at Campbell Island, New Zealand, have declined dramatically since the 1940s. Black ... -browed Albatross numbers went into a steep decline in the 1970s and, since at least 1984, have been ... increasing slightly at average rates of 1.1% and 2.1% per annum at two colonies. The long-term downward trend ...
Meeting Document : WG-FSA-04/58 : Autor(es): S.M. Waugh (New Zealand), H. Weimerskirch (France), P.J. Moore and P.M. Sagar (New Zealand)
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Research plan for toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in 2012/13
Abstract: A tagging survey in SSRUs B and C in Division 58.4.4 a & b was conducted in the ... 2011/12 fishing season with the aims of providing the data required for assessments of the population ... structure, size, movement and growth of Dissostichus spp. in the centred area of Division 58.4.4 a & b ... . An approximate stock biomass level of Dissostichus spp. in the survey area was tentatively estimated ...
Meeting Document : WG-SAM-12/17 : Autor(es): Delegation of Japan
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Beach debris survey – Main Bay, Bird Island, South Georgia, 2001/02
Abstract: During the twelfth year of standardised beach surveys of man-made debris at Bird Island ... represents a 33 % decrease on the total of 290 items recorded in 2000/01 and the lowest level of summer beach ... debris since 1994/95. Although only 7 fewer items were collected during the summer (a 5% decrease from ... last season), 90 fewer items were collected throughout the winter, a 63% reduction compared with last ...
Meeting Document : SC-CAMLR-XXII/BG/10 : Autor(es): Delegation of the United Kingdom
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Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997
Abstract: Mackerel icefish are widespread on the South Georgia shelf, Antarctica and have been ... subject to commercial fishing since the early 1970s. They are known to feed predominantly on krill. An ... index of condition which uses the ratio of the measured total mass to the estimated mass is show to ... provide a good indicator of local krill density. The index is likely to be little affected by the ...
Meeting Document : WG-EMM-00/44 : Autor(es): I. Everson (United Kingdom) and K.-H. Kock (Germany)
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Beach debris survey – Main Bay, Bird Island, South Georgia 1996/97
Abstract: The seventh year of surveys of beached man-made debris at Bird Island, South Georgia ... revealed a total of 289 items, 60 % less than in the two previous years. Of the total number of items, 62 ... % (n = 180) were collected during the summer, only the second year on record when then summer ... collection exceeded the winter. Nylon line, identical to that used in longline gear, accounted for 57 % of ...
Meeting Document : CCAMLR-XVII/BG/7 : Autor(es): Delegation of the United Kingdom
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ANNUAL REPORT FROM SCAR TO CCAMLR
Abstract: This paper reports on the various activities conducted by or involving SCAR that relate ... biennial business and delegates meetings, as well as reports on progress with the Evolution and ... Biodiversity in the Antarctic (EBA) programme, SCAR-MarBIN, the Southern Ocean Continuous Plankton Recorder ... Survey and the Census of Antarctic Marine Life (CAML) project. The SCAR-MarBIN data portal continues to ...
Meeting Document : CCAMLR-XXVIII/BG/34 : Autor(es): Submitted by SCAR
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Laboratory target strength measurements of free swimming Antarctic krill (Euphausia superba)
freely in the tank triggering the data acquisition system when generating a back scattered signal larger ... than a threshold, determined by the system noise level. Dorsal and ventral target strength estimates ... were calculated indirectly by deconvolution of the cumulative probability function of echo ensembles of ... single animal insonifications. For mean length classes in the range [29.6, 36.2] mm the median single ...
Meeting Document : WG-EMM-97/75 : Autor(es): Pauly, T., Penrose, J.D.
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Estimating uncertainty in local biomass estimates of toothfish in CCAMLR in Subareas 58.4 and 48.6 research blocks
Abstract: This study has used bootstrap methodology to quantify the uncertainty in toothfish ... biomass estimates from Chapman mark-recapture and the CPUE-by-seabed area methods in Research Blocks in ... Subareas 58.4 and 48.6. The Chapman mark-recapture point estimates and their confidence intervals were ... generally much larger than the point estimates and confidence intervals from the CPUE-by-seabed area biomass ...
Meeting Document : WG-SAM-17/12 : Autor(es): L. Robinson, P. Burch and K. Reid
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Annual report of global toothfish trade data
Abstract: This paper provides analysis on the data collated by GLOBEFISH from publicly released ... sources for the trade of toothfish products for the 2017 calendar year. The analysis has identified that ... the forms with mean unit values of 22.30 US$/kg for imports and 18.85 US$/kg for exports. The data ... identified the largest importer was the United States of America (USA), accounting for 54.01% of the global ...
Meeting Document : CCAMLR-XXXVII/BG/08 Rev. 1 : Autor(es): CCAMLR Secretariat
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Trade data analysis – Annual report of global toothfish trade data
Abstract: This paper provides analysis on the data collated by GLOBEFISH from publicly released ... sources for the trade of toothfish products for the 2018 calendar year. The analysis has identified that ... forms with mean unit values of 24.03 US$/kg for imports and 23.40 US$/kg for exports. The data ... identified the largest importer was the United States of America (USA), accounting for 36.50% of the global ...
Meeting Document : CCAMLR-38/BG/09 : Autor(es): CCAMLR Secretariat