Résultats de la recherche
-
The diet of Antarctic fur seals, Arctocephalus gazella, at King George Island, during the summer–autumn period
, krill and fish were the most frequent prey, occurring in an average of 97% and 69% of samples (n=128 ... fish species associated with krill swarms. A seasonal change observed in the relative proportions of ... the different fish prey taxa would indicate that fur seals spent more time foraging over the shelf in ... summer and off shelf in autumn. During the study period commercial fishing in the area was not based upon ...
Meeting Document : WG-EMM-04/4 : Auteur(s): G.A. Daneri, A.R. Carlini, C.M. Hernandez and A. Harrington (Argentina)
-
The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species
Abstract: Managing fisheries to achieve ecosystem objectives is in its infancy. A general ... approach for maintaining ecological relationships and providing for the recovery of depleted populations in ... taking the ecosystem approach in managing fisheries: (i) how might fisheries impact incidentally on an ... account of uncertainties in knowledge of the structure of ecosystems. Estimates of production arising ...
Meeting Document : WG-EMM-12/P04 : Auteur(s): A.J. Constable
-
Summary of holdings of Patagonian toothfish (Dissostichus eleginoides) otoliths and size-at-age estimates from Heard and McDonald Islands (Division 58.5.2)
Abstract: Scientific observers aboard vessels in the Australian fisheries in 58.5.2 have ... collected Dissostichus eleginoides otoliths since the fishery commenced in the 1996/97 season. This program ... has yielded data which has assisted with understanding age structure and growth rates of toothfish in ... 21000 otoliths have been collected from toothfish in 58.5.2, and more than 2500 otolith pairs have been ...
Meeting Document : WG-FSA-07/45 : Auteur(s): D.C. Welsford and G.B. Nowara (Australia)
-
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)
-
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.
-
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)
-
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)
-
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
-
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
-
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