Résultats de la recherche
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Stock status and population assessment of the Antarctic starry skate (Amblyraja georgiana) in Subarea 48.3
Deficient” by IUCN (Endicott & Kyne 2009) and is one of the main by-catch species in the longline ... Antarctic starry skates, and provide a preliminary stock assessment, showing that the current level of by ...
Meeting Document : WG-FSA-18/27 : Auteur(s): M. Söffker, N.D. Walker, M. Belchier and J. Ellis
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Modelling the impact of krill fishing on seal and penguin colonies
Abstract: A key area of concern highlighted by the Scientific Committee of the Commission for the ... region. The dynamics of krill in this region are strongly influenced by advective processes. A key ... ) are necessary given that there is a flux of krill through this region with its islands habited by ... spatial modelling framework that could be used to couple flux estimates with estimates of removals by both ...
Meeting Document : WG-EMM-05/14 : Auteur(s): 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
surveyed by large research vessels, and to survey responsively in areas where adult Macaroni penguins ... patterns in density but may have been exacerbated by the presence of a large iceberg (40 miles by 30 miles ... areas by large ocean-going research vessels will provide a more comprehensive understanding of the prey ...
Meeting Document : WG-EMM-04/35 : Auteur(s): A.S. Brierley, P.N. Trathan, J. Poncet and A. Morton (United Kingdom)
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Beach debris survey Signy Island, South Orkney Islands 1999/2000
from three study beaches. The debris was counted, measured and classified by type,material, mass and ... since 1998/99 by 17% but was still the second highest since 1995/96. Plastic waste was predominant, as ... into force by CCAMLR in 1995/96 has been effective and should continue. Classifying the waste by source ...
Meeting Document : SC-CAMLR-XIX/BG/06 : Auteur(s): Delegation of the United Kingdom
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Signy Island, South Orkney Islands, 1998/99
entangled but had lost their collars by the time of observation. All of the animals involved were juvenile ... males, the main component of the population at this time of year. The number of sightings increased by ... entangled fur seals had also increased (by 84%) since 1997/98 and decreased (by 8%) since 1996/97. Packaging ...
Meeting Document : SC-CAMLR-XVIII/BG/06 : Auteur(s): Delegation of the United Kingdom
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Fatty acid signature analysis from the milk of Antarctic fur seals and southern elephant seals from South Georgia: implications for diet determination
used in marine ecosystems in which diet determination by more direct methods is difficult and sometimes ... profiles determined by temperature programmed gas chromatography. Possible prey species collected from ... . Southern elephant seal data could be distinguished from Antarctic fur seals by lower levels of the fatty ... acids 16:4 n1, 18:2 n6, 18:4 n3, 18:4 n1 and 20:5 n3 and by higher levels of 18:0, 18:1 n9/ n11 (i.e. 18 ...
Meeting Document : WG-EMM-99/44 : Auteur(s): D.J. Brown, I.L. Boyd, G.C. Cripps and P.J. Butler (United Kingdom)
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INDICATIVE ESTIMATES OF BIOMASS AND YIELD OF WHITSON’S GRENADIER (M. WHITSONI) ON THE CONTINENTAL SLOPE OF THE ROSS SEA IN SUBAREAS 88.1 AND 88.2
ratio of the by-catch limit for macrourids to the catch limit for Dissostichus spp. in Division 58.5.2 ... bottom trawl surveys (IPY_CAML and BioRoss) have recently been carried out by New Zealand on parts of the ... those recorded for M. carinatus on Banzare Bank. Because the strata covered by the New Zealand surveys ... area were made by extrapolating the more recent IPY-CAML survey catch rates across the entire slope ...
Meeting Document : WG-FSA-08/32 : Auteur(s): S.M. Hanchet, D. Fu and A. Dunn (New Zealand)
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A critical re-examination of the evidence for a possible dependence of Weddell seals (Leptonychotes weddellii) on Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea, Antarctica
. As a new approach, we also estimate Weddell seal food requirements by considering nutritional quality ... -energy food resource for Weddell seals that possibly cannot be adequately replaced by other prey, in ... populations on toothfish, and hence possible impacts of toothfish removal by fisheries, is primarily hindered ... by (a) insufficient information on Weddell seal diet, due to inadequate temporal coverage and biased ...
Meeting Document : WG-EMM-13/28 : Auteur(s): R. Eisert, M.H. Pinkerton (New Zealand), S.D. Newsome and O.T. Oftedal (USA)
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Diets of Antarctic toothfish estimated from fatty acids and stable isotopes
Antarctic toothfish, by-catch and their stomach contents were collected for the past five years in the eight ... characterized by high proportions of monounsaturated FAs and low proportions of polyunsaturated FAs, differing ... were well established by self-organizing map (SOM) analysis. Similar FA profiles and SI values of ... shifts on the nonmetric multidimensional scaling plot and the SOM map by realistic diet proportions ...
Meeting Document : WG-FSA-17/12 : Auteur(s): C.-K. Kang, S.-G. Choi, J. Lee, J. Lee and D. An
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Predation release of Antarctic silverfish in the Ross Sea: how sensitive is the conclusion to uncertainties in the diet of Antarctic toothfish over the shelf?
toothfish stomachs showed that toothfish consume only a small proportion of silverfish (1.9–5.6%W i.e. by ... predation by fishing (643 tWW/y) was equivalent to 2.4% of the amount of silverfish estimated to be consumed ... annually by Adélie penguins in this region. This result was inconsistent with predation release of ... alternative indirect pathways through the food-web by which changes to toothfish could affect Adélie penguins ...
Meeting Document : WG-FSA-15/41 : Auteur(s): M.H. Pinkerton, P. O’B. Lyver, D.W. Stevens, J. Forman, R. Eisert and S. Mormede (New Zealand)