Search results
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Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends
BblCB060Al1TbCH 113 KYTKa. CeJIeKTI1BHble - 3 - cnoco6HOCTif 060HX neHTO'IHblX KYTKOB 6bInH ropa3Ao nY'IWe ... , with an ICES slide caliper (load of 4 daN) and calculated as a mean from 30 measurements. For investigations ... . Basic selectivity factors, i.e. mean fish length for three main selectivity levels : 25, 50 and 75 ... : selectivity interval consisting of the difference in cm between the mean length of fish for selectivity ... . It was found that the selectivity properties of twine codends are unsatisfactory in the case of ... Paper Title: Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined ... , especially Scotia Sea icefish and South Georgia icefish the determination of a proper mesh size of trawls ... used in fishing for them requires further research. It should first of all cover twine codends with a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Author(s): Zaucha, J.
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The migration patterns of Electrona carlsbergi (Tåning, 1932)
ways and means (mechanisms) by which this species carries out meridional migration in various frontal ... the SPFZ into the Subantarctic zone by means of eddy formations which occur periodically in the ACC system ... ways and means (mechanisms) by which this species carries out meridional migration in various frontal ... the SPFZ into the Subantarctic zone by means of eddy formations which occur periodically in the ACC system ...
Meeting Document : WG-FSA-93/18 : Author(s): A.N. Kozlov (Russia)
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Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)
Resolution Imaging Spectroradiometer (MODIS) Aqua seasonal mean Fluorescence Line Height (FLH) for Austral ... ) and its products are readily available. Behrenfeld and Falkowski (1997b) used it to arrive at a mean ... have been applied to the Southern Ocean to derive (i) mean (per unit area) or total (spatially ... the per unit area productivity might be high in these regions, their small spatial extent means ... regard to their use in the Southern Ocean. A brief history of algorithms linking ocean colour to primary ... / Description: This paper reviews Southern Ocean primary productivity within the framework of satellite remote ... sensing and the development of food-web models. The satellite ocean colour (chlorophyll) data record is ... described, from the Coastal Zone Colour Scanner (CZCS) in the late 1970s through to the Ocean Colour and ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Author(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear
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Factors affecting the growth rate and mass at weaning of Antarctic fur seal pups at Bird Island, South Georgia
of foraging trips, and the mean duration of both foraging trips at sea and nursing visits ashore on the growth ... of pup and mean duration of foraging trips. Growth rates of male and female pups varied considerably ... , and the mean duration of both foraging trips at sea and nursing visits ashore on the growth and mass at weaning ... characteristics in 1988 or 1989. However in 1990 there was a negative relationship between growth of pup and mean ...
Meeting Document : WG-CEMP-93/09 : Author(s): N.J. Lunn, I.L. Boyd, T. Barton and J.P. Croxall (United Kingdom)
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Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983–2010
declined from 1983 to 1991, and an increase in mean size during 1983-84 is consistent with weak cohorts ... period showed no change in modal size or mean length of the fish. We relate these patterns to the fishery ... , and an increase in mean size during 1983-84 is consistent with weak cohorts during preceding years. Modal age ... size or mean length of the fish. We relate these patterns to the fishery and suggest that a further two ...
Meeting Document : WG-FSA-12/P01 : Author(s): E.R. Marschoff, E.R. Barrera-Oro, N.S. Alescio and D.G. Ainley
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An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort
of this paper, particularly with regard to the behaviour of vessels when detected, mean that this method ... Table 2). This means that the results differ primarily by the multiplier that is used and so ... conservative) using the new method. One of the advantages of the new method is that it allows an estimation ... shing. This means that for a given number of illegal cruises there is a negative correlation between ... performs better in the case of zero detections and can potentially better handle the evasion of detection ... fishing (in the simulation datasets) for a given estimated level of fishing is very large. This range of ... Paper Title: An alternative method for estimating the level of illegal fishing using simulated ... effort is put forward. The results from this new method are similar to those of the Agnew and Kirkwood ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Author(s): Ball, I
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Relationships between the distribution of whales and Antarctic krill Euphausia superba at South Georgia
abundance and mean krill density at the largest spatial scale examined (80 x 100km). At progressively ... m depth) that had higher mean krill densities compared with areas where whales were recorded. To compare ... at a number of spatial scales. There was a positive relationship between whale abundance and mean krill ... not recorded. In particular whales were absent from inshore areas (up to 300 m depth) that had higher mean ...
Meeting Document : WG-EMM-99/30 : Author(s): K. Reid, A.S. Brierley (United Kingdom) and G.A. Nevitt (USA)
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Hydrography and acoustic biomass estimates of Antarctic krill (Euphausia superba) near the South Shetland Islands, Antarctica, during January 2000: preliminary results
for integrated backscattering area to areal krill biomass density at 120 kHz was 0.1556. The mean density ... of krill near the SSI area was 12 g/m2 with a coefficient of variance (CV) of 14.5%. The mean density ... for integrated backscattering area to areal krill biomass density at 120 kHz was 0.1556. The mean density ... of krill near the SSI area was 12 g/m2 with a coefficient of variance (CV) of 14.5%. The mean density ...
Meeting Document : WG-EMM-00/52 : Author(s): D. Kang, Y. Lee, H.-C. Shin, W. Lee and S. Kim (Republic of Korea)
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Indices of prey availability near the Seal Island CEMP site: 1990 to 1996
C O r I I a C y W T C I I C . Q ~ M O T ~ ~ @ M Y ~ C K A M L ? A H A e K C a M B YI.ICIIeHH0CTI.I KpI.In5I, I I 0 n y Y e H H b I M I . I C n O M O U b W C e T e B b I X npo6 ... and averaged over each 100 m of distance along the trackline. For the purposes of this paper, mean volume ... - 31 Jan 17-28 Jan 16 - 29 Jar1 23 Jan - 4 Feb (ii) Mean distance of prey from Seal Island ... . (iii) Mean depth of prey, where D,,,,A is the mid-depth of the ith depth bin. (iv) Persistence ... / Description: Four indices of prey availability are calculated from surveys conducted in the vicinity of the ... Paper Title: Indices of prey availability near the Seal Island CEMP site: 1990 to 1996 Abstract ... Seal Island CEMP site during the austral summers of 1990 to 1996. The indices are measures of average ... surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Author(s): Hewitt, R.P., G. Watters and D.A. Demer
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METHODOLOGY OF EVALUATING THE AQUATIC LIFE RESOURCES
in the proposed technique offer the mean integral values of probabilities. It is recommended to minimize errors ... in the proposed technique offer the mean integral values of probabilities. It is recommended to minimize errors ...
Meeting Document : WG-SAM-08/P02 : Author(s): L.A. Kovalchuk (Ukraine)