Search results
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Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 to 1996
regions in the western Antarctic from October 1978 to August 1994, including the Long Term Ecological ... data collected by the Scanning Multichannel Microwave Radiometer (SMMR) from October 1978 to August ... versus years, four periods of extensive ice cover are evident. The first period peaked in August 1980 ... . The second peaked in August-September 1986; the ice did not fully retreat during the following summer ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 65–73 : Author(s): Hewitt, R
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Experimental evaluation of the effectiveness of weighting regimes in reducing seabird by-catch in the longline toothfish fishery around South Georgia
this area are also likely to interact with the vessel during setting operations. From early sets ... . Stone weights were attached at regular intervals along the line, every 24 hooks (40 m). These sections ... redeployed but approximately half its length had been lost. The lost section of the streamer line ... was dependent on the weighting regime long-term health of the bird concerned. In total, and the number of black ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 119–131 : Author(s): Agnew, D.J., A.D. Black, J.P. Croxall and G.B. Parkes
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International CCAMLR applied research and monitoring program, Prydz Bay priority area
to investigate the factors controlling natural variability and interactions between the key species ... in, and interactions between components of the ecosystem are essential complements to ship-board investigations ... carried out during 1986. During the next three summers (Section 7) intensive field work ... and 1988/89 summers (Section 7) a short period (5+ days) will be devoted to sampling Pleuragramma ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Author(s): Australia
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Assessment of krill flux factors in waters of South Orkney Islands during summer 1996
) was located in the zone of interaction between waters of the Antarctic Circumpolar Current (ACC ... of interaction between waters of the Antarctic Circumpolar Current (ACC) and the Weddell Sea. The study area ... in Subarea 48.2. The study area (S0 X 240 n miles) was located in the zone of interaction between waters ... . A oceanographic stations; 1-16 sections of the boundary of the study area used to estimate krill flux and water ... Georgia). In order to assess the overall pattern of krill flux over the Atlantic Antarctic Section (AAS ... (ACC) and the Weddell Sea interact and have a fundamental impact on the overall pattern of krill flux ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 195–204 : Author(s): Kasatkina, S.M., V.N. Shnar, M.I. Polischuk, A.M. Abramov and V.A. Sushin
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Movement, growth and available abundance to the fishery of Dissostichus eleginoides Smitt, 1898 at Heard Island, derived from tagging experiments
has been published (Appleyard et al., 2001; Smith et al., 2001; Smith and McVeagh, 2000) which ... on a more local scale are less well defi ned; Appleyard et al. (2001) found very few genetic differences ... , k = 0.029 year-1, t0 = -2.56; data from SC-CAMLR, 2001). The tagged fi sh then grow each day according ... and M = 0.16 (SC-CAMLR, 2001). As tagged fi sh are released in a group, they may not immediately mix ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 33–48 : Author(s): Williams, R., G.N. Tuck, A.J. Constable and T. Lamb
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Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels
-system longline vessels to attach 8.5 kg weights at 40 m intervals on longlines to minimise interactions ... at 40 m intervals on longlines to minimise interactions with seabirds. The weights typically used ... on longlines to minimise interactions with seabirds. The weights typically used are collections of rocks ... interactions avec les oiseaux de mer. Les lests sont généralement constitués d'un un sac en filet contenant un ... interactions with seabirds. Spanish- system longlines are particularly dangerous to seabirds in the first ... lines are payed out from opposing sides of the vessel. The hook line is kept in sections in baskets ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon
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A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia
; for otoliths, we used transverse sections prepared by baking and grinding the posterior and anterior sides ... impressions on acetate slides; for otoliths, we used transverse sections prepared by baking and grinding ... CCAMLR Scicrzce, Vol. 8 (2001): 75-92 A COMPARISON ... ; for otoliths, we used transverse sections prepared by baking and grinding the posterior and anterior sides ... avons pris des elnpreintes sur des lames d'acktate; pour les otolithes, nous avons utilise des sections ... 5, but were distinct on fin-ray sections; validation of older fish was necessary to prevent errors in age ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Author(s): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson
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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
. 2. METHODS 2.1 The Survey Design The survey was designed to investigate some of the interactions taking ... of systematic errors. Each transect was divided into six sections approximately 30 n miles in length. Each ... section was further divided into 1 n mile integration intervals (ESDU). Density was estimated from ... the acoustic parameter mean volume backscattering strength (MVBS). 226 At the end of each section various ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Author(s): Murphy, E., I. Everson and A. Murray
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
, with five sections with hooks No. 3 and five sections with hooks No. 4. The hooks used were also of Mustad ... /0) (Figure 2). Sections of different types of hooks were arranged randomly along the longline according ... to methodology described by Pope et al., (1983). Each section comprised of 150 hooks placed 2 m apart on 60 cm ... of females was 1:3.6. Figure 4 presents data collected in August 1991 off the coast of Valdivia from ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Author(s): Moreno, C.A.
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Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects
of an area stratum by fishing year interaction as an additional random effect in the GLMM is investigated ... . Fitting the stratum-by-year interaction as a fixed effect is problematic since it requires weighting ... -by-year interaction as a random effect avoids this difficulty, and diagnostic methods to evaluate ... the validity of considering this interaction as random are described. The methods are demonstrated using catch ... by fi shing year interaction as an additional random effect in the GLMM is investigated. Fitting ... the stratum-by-year interaction as a fi xed effect is problematic since it requires weighting ... -by-year interaction as a random effect avoids this diffi culty, and diagnostic methods to evaluate ... the validity of considering this interaction as random are described. The methods are demonstrated using catch ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Author(s): Candy, S.G