Résultats de la recherche
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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 : Auteur(s): D.J. McCafferty, I.L. Boyd and T.R. Walker (UnitedKingdom)
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PHYSICAL CONTROLS ON CORAL COMMUNITIES ON THE GEORGE V LAND SLOPE: SOME WORKING HYPOTHESES
been identified as a Vulnerable Marine Ecosystem in the Antarctic. The challenge is now to understand ... slope in depths of 570 – 950 m. Based on these results we propose some working hypotheses to explain ... their distribution. Icebergs scour to 500 m in this region and the lack of such disturbance is probably ... a factor allowing growth of rich benthic ecosystems. In addition, the richest communities are found ...
Meeting Document : WS-VME-09/04 : Auteur(s): De Santis, L., Riddle, M.J., Beaman, R.J., Post, A.L., O’Brien, P.E.
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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 : Auteur(s): D.J. Agnew and M. Belchier (United Kingdom)
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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 : Auteur(s): R.L. Radtke and K.T. Hill (USA)
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Gestion de précaution de la pêcherie de krill antarctique à des échelles spatiales réduites dans le contexte de la variabilité climatique régionale : l'absence de données implique-t-elle une absence d'impact ?
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 : Auteur(s): 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 : Auteur(s): 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 : Auteur(s): É.E. Plagányi and D.S. Butterworth (South Africa)
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Beach litter survey, Signy Island, South Orkney Islands 1994/95
cleared from three study beaches, Foca Cove, Cummings Cove and Starfish Cove, in December 1994, and ... scientific research stations in the South Orkney Islands. For example, only six of the 208 items recovered ... (The beach litter surveys carried out in 1990/91, 1991/92 and 1992/93 showed a steady reduction in both ... in 1993/94. The results from 1994/95 are again higher than those recorded in 1992/93. Of particular ...
Meeting Document : CCAMLR-XIV/BG/15 : Auteur(s): Delegation of the United Kingdom
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KRILLBASE: a multinational, circumpolar database of abundance of Antarctic krill and salps
they are stored in national archives, sometimes only in archived notebooks. An international team of ... , including studies in support of fisheries management and conservation. Previous versions of KRILLBASE have ... contains data on krill from ~12,520 hauls and data on salps from ~10,832 hauls. These span 49 seasons in ... from both monitoring programs and large synoptic surveys. Due to variations in sampling method ...
Meeting Document : SC-CAMLR-XXXV/BG/24 Rev. 1 : Auteur(s): A. Atkinson, S. Hill, H. Peat, R. Downie and L. Gerrish