Résultats de la recherche
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An assessment of seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, March–May 1997
interactions with seabirds, and the effectiveness of measures employed to mitigate seabird mortality. In this ... into the side of the vessel. Few birds were generally seen following the vessel during setting ... to dive; large numbers of black-browed albatrosses were seen when the moon was full, but were ... effectiveness of streamer-lines in mitigating bird mortality found no significant difference due to a streamer ...
Meeting Document : WG-FSA-97/09 : Auteur(s): Ashford, J.R., Croxall, J.P.
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Operations of Chilean vessel Betanzos fishing Antarctic krill (Euphausia superba) (June 2011 – April 2012)
Abstract: This paper describes the main results obtained in krill fishing (Euphausia superba ... ) made by the conventional trawler Betanzos in the Antarctic region (Subareas 48.1, 48.2 and 48.3 ... , fishing yields and length frequency distributions of captured krills. Author(s): P.M. Arana (Chile) Title ... : Operations of Chilean vessel Betanzos fishing Antarctic krill (Euphausia superba) (June 2011 – April 2012 ...
Meeting Document : WG-EMM-12/30 : Auteur(s): P.M. Arana (Chile)
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A method for preparing large numbers of otolith sections for viewing by scanning electron microscope
Abstract: In an investigation of the age structure of a population of Notothenia coriiceps ... facilitate present methods of ageing fish populations, especially for fishery work in the Antarctic where ... Richardson at the South Orkney Islands, Antarctica, the microstructure of otoliths was examined. Progress is ... reported on a method used for processing large numbers of otoliths using a scanning electron microscope ...
Meeting Document : WG-FSA-93/07 : Auteur(s): J.R. Ashford, K. Robinson and M.G. White (United Kingdom)
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Collaborating to support effective protection of Southern Ocean ecosystems
transhipments in the Convention Area; tightening legal loopholes for those involved in IUU fishing; implementing ... Abstract: In this paper, COLTO and ASOC highlight important enforcement and compliance actions ... undertaken since CCAMLR XXXV and recommend further steps that CCAMLR can take to demonstrate leadership in ... compliance and enforcement as well as in environmental protection, including additional regulations for ...
Meeting Document : CCAMLR-XXXVI/BG/29 : Auteur(s): Submitted by ASOC and COLTO
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Populations of surface-nesting seabirds at Marion Island, 1994/95 to 2002/03
in numbers of king penguin chicks surviving to the end of winter. Author(s): R.J.M. Crawford, J ... Abstract: During the 1990s and early 2000s, populations of surface-nesting seabirds at Marion ... Island showed different trends, but for the majority of species numbers decreased. Reduced numbers of ... attributed to an altered availability of food. Decreases in numbers of dark-mantled sooty albatrosses ...
Meeting Document : WG-EMM-03/8 : Auteur(s): R.J.M. Crawford, J. Cooper, B.M. Dyer, M.D. Greyling, N.T.W. Klages, P.G. Ryan, S.L. Petersen, L.G. Underhill, L. Upfold, W. Wilkinson, M.S. de Villiers, S. du Plessis, M. du Toit, T.M. Leshoro, A.B. Makhado, M.S. Mason, D. Merkle, D. Tshingana, V.L. Ward and P.A. Whittington (South Africa)
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Results of fish stock assessment survey, South Georgia, December 1987 – January 1988
complements earlier surveys in the same area and showed that most of the stocks are continuing to decline ... in abundance. Author(s): United States of America Title: Results of fish stock assessment survey ... Abstract: Commercial fish stocks around South Georgia have been declining since the early 1970 ... . Notothenia rossii is showing no signs of recovery and Champsocephalus gunnari is likely to continue declining ...
Meeting Document : SC-CAMLR-VII/BG/23 : Auteur(s): United States of America
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Long-term observations from Antarctica demonstrate that mismatched scales of fisheries management and predator–prey interaction lead to erroneous conclusions about precaution
that can help conserve marine predators. Uncertainty about the impacts of fisheries removals on ... dependent predators bolsters this perspective, but consideration of the spatio-temporal scales over which ... are as precautionary as presumed. Antarctic krill are targeted by the largest fishery in the Southern ... local harvest rates of krill were ≥ 0.1, and this effect was similar in magnitude to that of poor ...
Meeting Document : WG-EMM-2019/11 : Auteur(s): G.M. Watters, J.T. Hinke and C.S. Reiss
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Study on reproductive biology of Champsocephalus gunnari, Chaenocephalus aceratus and Pseudochaenichthys georgianus from South Georgias and Shag Rocks, Dr Eduardo Holmberg survey – May 2013
This not only confirms the spawning time of C.gunnari in South Georgias and Shag Rocks, but also ... and 7 oocytes/g for C.aceratus and P.georgianus. In the case of C.gunnari and P.georgianus, it was ... Abstract: The reproductive biology of C.gunnari, C. aceratus and P.georgianus was studied on ... samples taken around South Georgias and Shag Rocks. The macroscopic analysis indicated the presence of ...
Meeting Document : WG-FSA-13/59 : Auteur(s): M.I. Militelli, G.J. Macchi and K.A. Rodrigues (Argentina)
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Determination of Antarctic krill acoustic back-scattering cross-section
-section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... signal from one specimen resolved by the hydroacoustic instrument. By calculating the mean level of the ... directivity diagramme of the antenna and the mean level of the standardized echo signal, it is possible to ... / Description: When determining the density krill of concentrations it is necessary to know the acoustic cross ... (7) in (10) and (4) in (7) we obtain the expression for determining the mean value of acoustic back ... the distance. The mean and maximum length of krill are determined from data collected in sample ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... , Pa antenna sensitivity in reception, V/Pa amplification of the receiver directivity function ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 141-152 : Auteur(s): Protaschuk, V.A. and T.A. Lukashova
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Accumulation of fishing debris, plastic litter and other artefacts on Heard Island and Macquarie Island, Southern Ocean
surveys in 1986-87 at Heard Island, and 1988 at Macquarie Island. The minimum rate of artefact ... Abstract: Sections of coastline of Heard and Macquarie Islands were surveyed for marine debris in ... summer 1987-88, and 1989 respectively. These surveys were carried out at the same sites of previous ... catchment area. Plastic litter was a major component of the debris at both islands. Fisheries related debris ...
Meeting Document : CCAMLR-VIII/BG/11 : Auteur(s): D.J. Slip and H.R. Burton (Australia)