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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Target strengths of Antarctic krill (Euphausia superba)
, except for the fourth cause. In order to extract target strengths or backscattering cross sections ... with the theoretical beam patterns. Integration of the squared beam pattern over the cage cross section ... . This is alternatively expressed through the backscattering cross section 0' by the standard relation, TS=10 log ... section per krill. (2) The effective cage contribution can also be inferred by regressing the equivalent ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Author(s): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote
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Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3
stocks and which may or may not be predictable. The possibility of major ecosystem interactions ... conservative. This paper is divided into two sections. The first explores the possibility of developing ... by the uncertainties in M associated with ecosystem interactions at South Georgia (Figure 1). The various sources ... that krill is particularly scarce. As more information is acquired about the dynamic interactions in Figure ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Author(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes
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Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)
generally begins with a simple descriptive picture of major interactions. Extending such studies ... ). Quantification of the interactions surrounding C. gunnari forms part of a major BAS program investigating ... the key interactions of harvested and dependent species around South Georgia. Everson et a1 ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Author(s): Everson, I., B. Bendall and A. Murray
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Status of krill target strength
is the following. The quantities of target strength, back scattering cross section, and mean volume backscattering ... fis the far-field scattering amplitude. The backscattering cross section, 0' or O'bs, is defined ... called the differential scattering cross section in the backscattering direction. Because ... the backscattering cross section is expressed in SI units. The TS of an idealised, perfectly reflecting sphere ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Author(s): Foote, K.G., D. Chu and T.K. Stanton
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
, 2001; Post, 2002). Therefore, using a combination of FA profiles (diet composition) and stable ... interactions within the Ross Sea continental shelf ecosystem. Phil. Trans. R. Soc. B, 362: 95–111. Stevens ... . Rasmussen. 2001. Variation in δ15N and δ13C trophic fractiona- tion: implications for aquatic food web ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Author(s): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish
. The mortality resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea ... resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea 88.2 ... the loss of sections of bottom longline gear in the Ross Sea region and Subarea 88.2 Antarc- tic toothfish ... longline gear is most often lost due to interactions of downlines (lines connecting surface floats ... of sections of bottom longline gear in the Ross Sea region and Subarea 88.2 Antarctic toothfish (Dissostichus ... attached to sections of line each year, and the associated length of longline lost (iii) provide ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Author(s): Webber, D.N. and S.J. Parker
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
; Williams et al., 2002; Pollock et al., 2004). A further adjust- ment issue, and one that interacts ... distribution, need to be accommodated. The present study addresses these issues by devel- oping a parametric ... on the population object counted (adult, nest or chick) and the date of the count. These issues are addressed ... . This case was cho- sen because it represented four issues of the estima- tion process: adjustment of counts ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Author(s): McKinlay, J., C. Southwell and R. Trebilco
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
is usually higher than 10% (Campana, 2001). There was no apparent bias between the two readings of reader ... by the presence of between-reader bias (see Campana, 2001). Both readers obtained similar age estimates ... growth curves with those for other skates from New Zealand (Francis et al., 2001), the Falkland Islands ... to Antarctic skates. In addition, understanding the dynamics of thorn growth, principally through sectioning ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Author(s): Francis, M.P. and M.J. Gallagher
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Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited
(Jones et al., 2001). Absolute fecundity was esti- mated by weighing all oocytes and a subsample ... and Trella, 2001). USSR fi shing vessels from Murmansk and Kaliningrad fi shed in the area in most years ... in comparatively small areas (Shust, 1998; Sosinski and Trella, 2001) which were easily missed during research ... between 200 and 300 m (Sosinski and Trella, 2001). Catches in the commercial fi shery, as far ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Author(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina