Search results
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Estimates of natural and fishing mortality from toothfish mark–recapture and catch-at-age data at South Georgia
-recapture model, applied to the South Georgia toothfish tagging data. The updated model incorporates the ... data from all the analysed cohorts in the estimation routine, and we examine the potential estimation ... bias, using simulated data. The results confirm earlier findings, with lower estimates of natural and ... fishing mortality, for the given age range, than are assumed and predicted by the current assessment ...
Meeting Document : WG-FSA-06/54 : Author(s): R.M. Hillary and D.J. Agnew (United Kingdom)
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Spectra analysis of Drake Passage Oscillation Index (DPOI) from 1952 to 2003, Antarctica
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... affects the Antarctic marine ecosystem as a whole. Naganobu et al. (1999) had assessed variability in ... (westerlies) determined from sea-level pressure differences across the Drake Passage, between Rio Gallegos ... , Argentina, and Base Esperanza, at the tip of the Antarctic Peninsula, sea ice cover and chlorophyll-a in the ...
Meeting Document : WG-EMM-04/46 : Author(s): M. Naganobu and K. Kutsuwada (Japan)
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Fishing intensity of Russian fleet krill fishery in Subarea 48.2 and 48.3
Abstract: The purpose of this paper was estimating commercial fleet impact on krill population in ... different months over 1987-1990 fishing seasons, during which the Soviet fleet’s yields from Subareas 48.2 ... and 48.3 amounted to at least 95% of total catch. The calculations were based on the Soviet fleet haul ... -by-haul data using a model of probabilistic-statistical theory of fishery systems developed in the ...
Meeting Document : WG-EMM-02/62 : Author(s): S.M. Kasatkina and V.F. Ivanova (Russia)
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Review of fish and invertebrate by-catch in trawl fisheries in Division 58.5.2
Abstract: This paper presents estimates of the total removals of fish and invertebrate bycatch by ... fishing season and fishing ground, from the D. eleginoides and C. gunnari trawl fisheries in Division ... 58.5.2. On average, 94 % of hauls in the D. eleginoides fishery and 93% of hauls in the C. gunnari ... fishery were observed. The percentage of observed hauls was used as a scaling factor to convert observed ...
Meeting Document : WG-FSA-02/46 : Author(s): E.M. van Wijk and R. Williams (Australia)
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Annual report from SCAR to CCAMLR
Abstract: Abstract This Background Paper reports on the various activities conducted by SCAR ... that are of potential interest to CCAMLR, with a focus on new activities. The book on Antarctic Climate ... Change and the Environment (ACCE) was published in October 2009 and the Southern Ocean Observing System ... (SOOS) planning document has been finalized, the implementation of which will be supported by a ...
Meeting Document : CCAMLR-XXIX/BG/15 : Author(s): Submitted by SCAR
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on recent survey results
Abstract: The annual Random Stratified Trawl Survey was undertaken in Division 58.5.2 in the ... icefish population structure, abundance and yield for the area of Division 58.5.2 to the west of 79 o 20 ... ’ E using standard CCAMLR methods. A pattern of 5 year classes being present simultaneously in the ... 2+, dominate the population in both abundance and biomass. A new length weight model is estimated ...
Meeting Document : WG-FSA-12/26 : Author(s): D.C. Welsford (Australia)
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Revised proposal for a conservation measure establishing a Marine Protected Area in Domain 1 (Western Antarctic Peninsula and South Scotia Arc)
Abstract: This paper contains the revised version of the proposed draft Conservation Measure ... presented in last year’s paper CC-CCAMLR-XXXVII/31. The revised version of the D1MPA proposal addresses ... outstanding issues as raised by Members during the 37th Scientific Committee Meeting (Hobart, 2018). The ... rationale underlying the modifications in the D1MPA Model, aimed to achieve conservation objectives agreed ...
Meeting Document : CCAMLR-38/25 Rev. 1 : Author(s): Delegations of Argentina and Chile
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Fulfilling CCAMLR’s commitment to create a representative system of Marine Protected Areas
Abstract: The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) first ... adoption and entry into force of the Ross Sea MPA, ASOC calls on CCAMLR to make swift progress towards ... : Adopts the East Antarctica MPA proposal including the MacRobertson, Drygalski and D’Urville Sea-Mertz ... areas. Adopts the Weddell Sea MPA, keeping the boundaries intact so that the MPA contains the ecological ...
Meeting Document : CCAMLR-XXXVII/BG/36 : Author(s): Submitted by ASOC
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Growth of Antarctic krill Euphausia superba at South Georgia
Abstract: Antarctic krill Euphausia superba has a central role in the ecosystem of the Southern ... Ocean and knowledge of its growth rate is central to determining the factors influencing population ... dynamics. The length of Antarctic krill in the diet of Antarctic fur seals Arctocephalus gazella at South ... Georgia revealed a consistent increase in size between c 42- c 54 mm over the period October-March ...
Meeting Document : WG-EMM-01/18 : Author(s): K. Reid (United Kingdom)
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Some changes observed in Antarctic seabird distribution and behaviour
Abstract: The data on sea birds distribution and abundance collected on the route Kaliningrad ... - Kaliningrad from 1999 November to 2000 April are analyzed. Significant shift of the southern boundary range of ... the great shearwater Puffinus gravis up to South Sandwich Islands (about 7 degrees) is revealed. The ... fact may be explained by abundance fluctuation or shift of the Southern Polar Front to the South ...
Meeting Document : WG-EMM-00/36 : Author(s): F. Litvinov (Russia)