Resultados de la búsqueda
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Revision of the fishery–foraging overlap model
Abstract: The fishery-foraging model of Agnew and Phegan (1995) was reviewed by the Working Group ... was related to the total amount of krill removed from the foraging area during December to March. The ... Secretariat was tasked with the revision of the model, including modifications to the model in terms of both ... adjustments to temporal aspects of the underlying model and changes in the form of the index of overlap. The ...
Meeting Document : WG-EMM-98/05 : Autor(es): Secretariat
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ANTARCTIC TOOTHFISH STOCK ASSESSMENT IN DIVISION 58.4.1 ON THE BASIS OF CATCH AND CPUE DATA
Abstract: An attempt to use reported catch and CPUE data based on data of observers in the ... assessment of Antarctic toothfish stock in Division 58.4.1 is made. Unlike some previous results obtained for ... this division (e.g. Agnew et al., 2008), the assessment was intended to be independent of estimates of ... toothfish stock biomass in the Ross Sea. As a result of implementation of an age-structured and a dynamic ...
Meeting Document : WG-FSA-09/14 Rev. 1 : Autor(es): D. Vasilyev, K. Shust, A. Petrov, V. Tatarnikov and I. Istomin (Russia)
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophris and D. chrysostoma at Bird Island, South Georgia
Abstract: Population dynamics of Black-browed and Grey-headed Albatrosses were studied at Bird ... Albatross colonies decreased, at an average rate of 1.8% per annum. Although the total Black-browed ... Albatross population increased (at 0.8% pa.), 14 of the 23 colonies (including both study colonies ... ) decreased. Black-browed Albatrosses follow an annual breeding cycle, with over 80% of birds successful in ...
Meeting Document : SC-CAMLR-XII/BG/21 : Autor(es): Delegation of United Kingdom
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A brief exploitation of the stone crab Lithodes murrayi (Henderson) off south west Africa, 1979/80
uneconomic level. The extent of the L. murrayi grounds is examined on the basis of catch-per-unit-effort data ... . The species is largely confined to a bathymetric corridor of 500–700 m off South West Africa. Prior to ... crabs were present in small numbers over a much larger area. Over 90 per cent of the fishing effort was ... applied in this area of high concentration, accounting for almost 95 per cent by mass of the total catch ...
Meeting Document : WS-CRAB-93/21 : Autor(es): R. Melville-Smith (South Africa)
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Growth and Natural Mortality of Yellowfin Notothenia Patagonotothen guntheri shagensis from Shag Rocks Shelf
Abstract: Regularities of growth are established from the data of age determinations and analysis ... of yellowfin notothenia length-weight composition, mathematical description of length-weight ... dependence and parameters of Bertalanffy equation are given. Natural mortality coefficient, M, calculated by ... six various methods ranged from 0.63 to 1.06. With mean value of M, age and length at optimum ...
Meeting Document : WG-FSA-89/18 : Autor(es): V.I. Shlibanov (USSR)
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Destruction of Antarctic terrestrial ecosystems by a rapidly increasing fur seal population
Abstract: The terrestrial environment of Signy Island, South Orkney Islands, maritime Antarctic ... past decade there has been a dramatic increase in the number of Antarctic fur seals Arctocephalus ... of seals were present on the island prior to the initiation of commercial hunting in the early 1820s ... . The impact that the continuing increase of these seals had made on the island's terrestrial and ...
Meeting Document : SC-CAMLR-VII/BG/06 : Autor(es): R.I. Lewis Smith (United Kingdom)
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The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species
approach for maintaining ecological relationships and providing for the recovery of depleted populations in ... ecosystem, (ii) what should be the conservation objectives for predators of fished species, and (iii) what ... account of uncertainties in knowledge of the structure of ecosystems. Estimates of production arising ... for management purposes because they integrate across a range of “ecosystem” effects and, as ...
Meeting Document : WG-EMM-12/P04 : Autor(es): A.J. Constable
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An overview of tagging skates (Rajiformes) and CCAMLR skate tagging data
Abstract: Tagging studies of skates and rays worldwide provide valuable information to help ... better understand a wide range of metrics including movements and migrations, stock units, growth rates ... potentially valuable data source to better understand this group of fish. Despite tagging programmes being ... CCAMLR Working Groups. This report provides an overview of global tagging studies on skates, a review of ...
Meeting Document : WG-SAM-13/25 Rev. 1 : Autor(es): S.R. McCully, D. Goldsmith, G. Burt, R. Scott and J.R. Ellis (United Kingdom)
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ICED workshop and conference session on Southern Ocean foodwebs and scenarios of change
ecosystems in order to help inform management of Southern Ocean fisheries. ICED will convene a workshop and ... conference session in the near future in order to address these issues. The theme of the November 2013 ... workshop is “Southern Ocean food webs and scenarios of change”, and that of the June 2014 conference ... session is “Detecting, projecting and managing the impacts of change in Southern Ocean ecosystems”. We ...
Meeting Document : WG-EMM-13/13 : Autor(es): R.D. Cavanagh on behalf of the international ICED Scientific Steering Committee
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An overview of tagging skates (Rajiformes) and CCAMLR skate tagging data
Abstract: Tagging studies of skates and rays worldwide provide valuable information to help ... better understand a wide range of metrics including movements and migrations, stock units, growth rates ... potentially valuable data source to better understand this group of fish. Despite tagging programmes being ... CCAMLR Working Groups. This report provides an overview of global tagging studies on skates, a review of ...
Meeting Document : WG-FSA-13/33 : Autor(es): S.R. McCully, D. Goldsmith, G. Burt, R. Scott and J.R. Ellis (United Kingdom)