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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 : Автор(ы): 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 : Автор(ы): 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 : Автор(ы): 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 : Автор(ы): 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 : Автор(ы): 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 : Автор(ы): D.J. Slip and H.R. Burton (Australia)
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Management plan for Site of Special Scientific Interest No. 36 – Eastern Dallmann Bay
; • allow visits for management purposes in support of the aims of the management plan. Author(s ... to, the values of the Area by preventing unnecessary human disturbance; • allow scientific research ... ): Submitted by the USA Title: Management plan for Site of Special Scientific Interest No. 36 – Eastern ... Abstract: Management at Eastern Dallmann Bay aims to: • avoid degradation of, or substantial risk ...
Meeting Document : WG-EMM-02/57 : Автор(ы): Submitted by the USA
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Management plan for Site of Special Scientific Interest No. 35 – Western Bransfield Strait
; • allow visits for management purposes in support of the aims of the management plan. Author(s ... risk to, the values of the Area by preventing unnecessary human disturbance; • allow scientific ... ): Submitted by the USA Title: Management plan for Site of Special Scientific Interest No. 35 – Western ... Abstract: Management at Western Bransfield Strait aims to: • avoid degradation of, or substantial ...
Meeting Document : WG-EMM-02/58 : Автор(ы): Submitted by the USA
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A hybrid approach to acoustic classification and length estimation of krill
the acoustic estimates of species and sizes to net samples collected during three surveys conducted in ... components are the mean ratios of the volume backscattering coefficients, measured at two different ... / Description: The problem of acoustically identifying and estimating the sizes of two euphausiid species is ... are derived by integrating the individual decisions. The size structure of the classified aggregation ... ) j if f is the geometric mean of the acoustic wave number (c = speed of sound in m/s; fj , fi ... and moulting (Bucholz, 1982). (ii) Differences in swimming behaviour: The mean swimming angle of ... with mean value μ and standard deviation σ in dB. The pair of Gaussian-distributed pattern classes ... differently within fi shed aggregations. Another shortcom- ing is that the acoustic mean length of krill in ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Автор(ы): Azzali, M., I. Leonori and G. Lanciani
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Ross Sea region Marine Protected Area: Reporting, Periodic Review and Period of Designation Elements
Protected Area in the Ross Sea Region (CCAMLR-XXXIV-29): a possible procedure for reporting on research and ... might review the extent to which the objectives of the RSRMPA are still relevant and are being achieved ... ; and the period of designation for the RSRMPA. Author(s): Delegations of the USA and New Zealand Title ... Abstract: This paper describes the following elements associated with the proposal for a Marine ...
Meeting Document : CCAMLR-XXXIV/BG/39 : Автор(ы): Delegations of the USA and New Zealand
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