Resultados de la búsqueda
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Preliminary tag-recapture based population assessment of Antarctic toothfish (Dissostichus mawsoni) in Subarea 48.4
from tagging returns to average 1109 tonnes since 2010, with a five-year (2015-2019) average biomass of ... series and harvest rate of γ = 0.038, implies a 2019/20 yield of 45 tonnes using the 5-year average ... biomass. Historically, a precautionary approach has been applied in treating the 48.4 Antarctic toothfish ... as a separate stock. Based on the biological characteristics of the catches in Subarea 48.4, and the ...
Meeting Document : WG-FSA-2019/27 : Autor(es): T. Earl and A. Riley
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Managing fisheries to conserve the Antarctic marine ecosystem: practical implementation of the Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR)
1960s with exploitation of the marbled rockcod, Notothenia rossii, in the South Atlantic, a species ... deep longlining for toothfish (Dissostichus eleginoides and D. mawsoni) has caused a resurgence of ... Antarctic arose primarily from concern over potential effects of a fishery for the very abundant Antarctic ... krill, Euphausia superba. This species is considered to be an important prey of a wide range of avian ...
Meeting Document : SC-CAMLR-XVIII/BG/26
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Beach litter survey, Signy Island, South Orkney Islands 1994/95
Abstract: A beach litter survey was carried out on Signy Island, South Orkney Islands during the ... origin noted. At Foca Cove, a total of 91 items were found with a combined weight of 18.26 kg. At ... Cummings Cove, a total of 90 items were found (22.79 kg) and at Starfish Cove, a total of 27 items were ... (The beach litter surveys carried out in 1990/91, 1991/92 and 1992/93 showed a steady reduction in both ...
Meeting Document : CCAMLR-XIV/BG/15 : Autor(es): Delegation of the United Kingdom
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Multiple acoustic estimates of krill density at South Georgia during 2000/2001 reveal significant intra-annual and spatial variability
/ early January 2000/2001 (mid-season), and in March 2001 (late-season). The surveys were the first in a ... maintained by the British Antarctic Survey regularly since 1996 (and on a more ad hoc basis since the ... variability that could be used to set data from more restricted “snap-shot” cruises in a broader context. The ... restricted to four transects within a box to the north-west of South Georgia. The dedicated mid-season survey ...
Meeting Document : WG-EMM-01/15 : Autor(es): A.S. Brierley, C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst (United Kingdom)
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Abundance and trends in the breeding population of Adélie penguins (Pygoscelis adeliae) in the western Ross Sea
summer, with just over a quarter (27.5%) at colonies on Ross and Beaufort Islands (southern Ross Sea meta ... -population). The aggregated colonies of Cape Bird and Cape Crozier had a negative per capita growth rate of ... -1.8% for the years, 1981-2000 followed by a positive per capita growth rate of 5.5% for the years ... , 2001-2010. In contrast, a single declining trend line best represented the number of breeding pairs at ...
Meeting Document : WG-EMM-13/30 : Autor(es): P. O’B. Lyver, M. Barron, K.J. Barton, S. Gordon (New Zealand), D. Ainley, A. Pollard (USA), P.R. Wilson and M.H. Pinkerton (New Zealand)
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Beach debris survey – Main Bay, Bird Island, South Georgia, 2001/02
, South Georgia, a total of 193 items was collected, 140 during summer and 53 during winter. This ... 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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Fecundity and size at sexual maturity of the bigeye grenadier (Macrourus holotrachys) at South Georgia (CCAMLR Subarea 48.3)
to 260,000 eggs, a relatively high number for a macrourid. Mature ovaries were found to contain eggs ... final ovarian development is a prolonged process in M. holotrachys which probably lasts for a period of ... greater than a year. Sex ratios of specimens caught in the longline fishery are highly skewed with females ... outnumbering males by a ratio of 32:1 which may represent the true ratio of females to males within the ...
Meeting Document : WG-FSA-02/26 : Autor(es): T. Mulvey, S.A. Morley, M. Belchier and J. Dickson (United Kingdom)
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Longline fishing at Tristan da Cunha: impact on seabirds
important seabird populations. Two longline fisheries occur within Tristan’s Exclusive Economic Zone: a ... pelagic fishery for tunas and a demersal fishery for bluefish and alfoncino. Fishery observers have ... lines during the day, only one bird (a Great Sheawater Puffinus gravis) was killed (mortality rate 0.001 ... effort, probably has a much greater impact. Observations aboard one vessel in mid-winter suggest a ...
Meeting Document : WG-FSA-00/13 : Autor(es): N. Glass, I. Lavarello, J.P. Glass and P.G. Ryan (South Africa)
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Krill distribution variability and fishery conditions within the local ground of Subarea 48.3 in June 1991
Abstract: Experiments on estimation of krill transport by a current and its distribution ... characteristics variability were carried out within a local ground of Subarea 48.3 in the fleet operation area. It ... coefficient of catch per a houl of BMRT type vessel amount to V = 0.7, that of a trawl catchability V = 0.197 ... , the variation coefficient of krill biomass within the fishing ground V = 0.6, and a variation ...
Meeting Document : WG-EMM-95/04 : Autor(es): Kasatkina, S.M.
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Vessel notification
Abstract: A feasibility study of a modified NAFO ‘Hail’ System which requires that CCAMLR Flag ... divisions of the Convention Area, was carried out to assess how such a system might strengthen the CCAMLR ... Inspection if it were to be combined with a reliable system of advance notification of fishing vessels ... compared with the performance of a satellite-based vessel monitoring system (Inmarsat-C/GPS), which is also ...
Meeting Document : CCAMLR-XIV/13 : Autor(es): Secretariat