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Light levels experienced by foraging Antarctic fur seals, Arctocephalus gazella
(Arctocephalus gazella) at Bird Island, South Georgia (54° 00' S 38° 02' W) in the 1994/5 austral ... to minimum starlight (10-6 lux) at night and during deep daytime dives. The change in il1uminance ... with depth did not follow a simple exponential decrease as recorded in clear oceanic waters. TDRs ... recorded strong light attenuation in the top 50 m of the water column. The mean attenuation coefficient was ...
Meeting Document : WG-EMM-99/28 : Автор(ы): D.J. McCafferty, I.L. Boyd and T.R. Walker (UnitedKingdom)
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ADDING CATCH AT AGE AND SURVEY DATA TO THE 48.3 TOOTHFISH CASAL ASSESSMENT
Abstract: The catch-at-age based CASAL model for toothfish in Subarea 48.3, which was presented ... in 2007, is developed and extended here to include survey data. Additional adjustments to the model ... but in the past some cohorts have been missed by the survey. Fits to the survey CPUE are generally not ... retardation period and rate of tag loss. When these factors are included in the model the fits to the tag ...
Meeting Document : WG-SAM-09/13 : Автор(ы): D.J. Agnew and M. Belchier (United Kingdom)
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Dietary segregation of krill-eating South Georgia seabirds
period in 1986. For five species, Antarctic krill Euphausia superba was the main food (39-98% by mass ... , was different between all seabird species, reflecting some combination of differences in foraging ... ranges. selectivity by predators, or differences in escape responses of krill. For the krill-eating ... success and information on diet in 5-10 other years suggest that in 1986 seabird diet and reproductive ...
Meeting Document : WG-EMM-97/15 : Автор(ы): Prince, P.A., Croxall, J.P., Reid, K.
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Informative approaches to ageing Antarctic fishes
considered in terms of the passage of time (chronological age), and it can also be examined as ' ... ;physiological time'. In this regard otoliths and post-mitotic tissues may contain a large amount of ... biological and ecological information about a fish's age and past life history. In otoliths this ... correlated and that species differences in shape exist. Regression analyses of otolith dimensions may make it ...
Meeting Document : CCAMLR/86/FA/07 : Автор(ы): R.L. Radtke and K.T. Hill (USA)
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Streamlining the work of the Scientific Committee for the Conservation of Antarctic Marine Living Resources (SC-CAMLR)
Abstract: In recent years, the Scientific Committee has been dealing with a great diversity of ... at present. In our view, this stems from constraints on the way SC-CAMLR does work. In this paper ... , we describe these constraints and combine thoughts given to the CCAMLR Symposium in May 2015 on how ... these issues may be resolved. In particular, we propose some options for re-organising the work and ...
Meeting Document : WG-EMM-15/59 : Автор(ы): G. Watters (USA), A. Constable and D. Welsford (Australia)
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Предохранительное управление промыслом антарктического криля в мелких пространственных масштабах в контексте региональной изменчивости климата: означает ли отсутствие данных отсутствие воздействия?
Abstract: In this paper, we highlight how environmental variability has led to reduced penguin ... by the krill fishery at specific times or in particular areas might not be considered to be rational ... precautionary reductions in catch at relevant time and space scales in all areas. Moreover, an experimental ... implemented; this means that localised impacts from the fishery remain untested. Changing patterns in the ...
Meeting Document : SC-CAMLR-XXXV/11 : Автор(ы): Delegation of the United Kingdom
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Risk assessment framework for subdividing the krill catch trigger level, including relevant background data and information
Abstract: At its annual meeting in 2016, WG-EMM recalled its obligation to review and advise on ... discussions on this subject in paragraphs 2.201 to 2.244 of its WG report. WG-EMM recommended that work be ... in Area 48 through an e-group and to deliver these outputs to Scientific Committee (WG-EMM-16 ... , paragraphs 2.230-2.244). These outputs would first be provided to WG-FSA for review, which in turn would ...
Meeting Document : SC-CAMLR-XXXV/BG/37
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PROPOSAL TO STRENGTHEN CCAMLR’S PORT INSPECTION SCHEME TO PREVENT, DETER AND ELIMINATE ILLEGAL, UNREPORTED AND UNREGULATED FISHING
and the European Union In 2002, the Commission adopted conservation measure 10-03, Port Inspections of ... Vessels Carrying Toothfish. In 2008 and 2009, the Commission adopted amendments to conservation measure 10 ... be a problem in the Convention Area. The goal of this proposal is to address the continuing problem ... Conservation Measure 10-03. In our view, this proposal complements well and enhances the improvements made in ...
Meeting Document : CCAMLR-XXIX/35 : Автор(ы): Delegations of the USA and the European Union
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Modelling the impact of krill fishing on seal and penguin colonies
with the foraging area of land-based predators such as seals and penguins in the Antarctic Peninsula ... region. The dynamics of krill in this region are strongly influenced by advective processes. A key ... predator colonies. In order to estimate the krill production actually available for predator consumption ... , it is necessary not only to consider “snapshot” survey estimates of krill abundance in the vicinity ...
Meeting Document : WG-EMM-05/14 : Автор(ы): É.E. Plagányi and D.S. Butterworth (South Africa)
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Near-shore acoustic surveys for Antarctic krill at South Georgia, January 2004
Islands and off the Barff Peninsula, South Georgia, from a 59 foot yacht in January 2004. The purpose of ... the surveys was to determine krill density near shore, in regions that have not traditionally been ... surveyed by large research vessels, and to survey responsively in areas where adult Macaroni penguins ... were collected in seastate 6 with winds up to 30 knots and swells of approximately 2.5 m at survey ...
Meeting Document : WG-EMM-04/35 : Автор(ы): A.S. Brierley, P.N. Trathan, J. Poncet and A. Morton (United Kingdom)
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