Search results
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Large-scale peculiarities of phytocenosis species composition in the surface layer in the Antarctic Atlantic and Indian Ocean sectors
. In the eastern Weddell Gyre a great change in the composition of phytoplankton species was registered ... peripheral waters and the centre of the Weddell Gyre. In the eastern Weddell Gyre a great change ... the distribution of the south peripheral waters and the centre of the Weddell Gyre. In the eastern Weddell Gyre ... Current. In other regions phytoplankton biomass was lower. In the eastern part of the Weddell Gyre ... lost its importance. Two other species, T. antarctica and R. hebetata, prevailed in the community ... , but a substantial drop in phytoplankton biomass was observed (eastern part of tack Ill, tacks IV and V, see Figures ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 201-214 : Author(s): Makarov, R.R. and K.P. Fedorov
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Food consumption by predators in a CCAMLR integrated study region
in the Scotia Sea (Croxall et al., 1985). Unfortunately, the working version of the program was lost when BAS ... moved its computing away from Cambridge University. The lost program will be referred to as Version 1.0 ... travelling (e.g., feeding or resting). If the travel speed is v m S-l and proportion of the trip spent ... ). A foraging trip is defined here as the time between feeds, and is calculated from the feeding frequency ... Paper Title: Food consumption by predators in a CCAMLR integrated study region Abstract ... consumption of seabird predators is provided. This model is a development of earlier ones used in the South ... Georgia Integrated Study Region and incorporates new features, allowing for seasonal variation in predator ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 489–519 : Author(s): Croxall, J.P., C. Ricketts and A.G. Wood
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A simple approach for calculating the potential yield of krill from biomass survey results
captura. Se considera que los efectos estacionales tienen menos importancia. 1. IN1RODUCTION One ... which is to be used in equation (1) is considered to be made in the middle of the season (Le. mid ... the mass of laiU of age a at the start of the "year" (wa) is given by: (A.3) In the middle ... of the initial deterministic age-structure has been lost. (iv) In year y = 10 (the year before fishing ... results Abstract / Description: Estimates are calculated for the parameter λ in the yield equation Y = λ ... MB 0 for a krill fishery in which both the fishery and krill growth are seasonal. The criterion used ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Author(s): Butterworth, D.S., A.E. Punt and M. Basson
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Validation of sink rates of longlines measured using two different methods
or in congregations of seabirds before the target depth was reached. No TDRs were lost during the trial. Bottle tests ... before the target depth was reached. No TDRs were lost during the trial. Bottle tests were most useful ... . No TDRs were lost during the trial. Bottle tests were most useful, depending on sea state and weather ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 179–187 : Author(s): Wienecke, B. and G. Robertson
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Reproductive performance of seabirds and seals at South Georgia and Signy Island, South Orkney Islands, 1976-1987: implications for Southern Ocean monitoring studies
of breeding population size, breeding success, foraging trip duration and offspring growth rate. 1977-78 ... in some or all of breeding population size, breeding success, foraging trip duration and offspring growth ... shown major fluctuations in some or all of : breeding population size, breeding success, foraging trip ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 445-447 : Author(s): Croxall, J.P., T.S. McCann, P.A. Prince and P. Rothery
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
Eastern Scotia Sea 62'5, 40°W 0" 49"s 62"s 56"W 20°W Antarctic Peninsula 65"S, 50°W 330" 52"s 68"s 79 ... °W 65"W 0, 0 Table 3: Parameters used to determine the transect sampling zones. Stratum Eastern Edge ... the Eastern Edge of the Transect Sampling Zones (km) Random Shift T-01 T-02 T-03 T-04 T-05 T-06 T-07 T-08 ... 0,o Table 6: Priority for omitting transects following periods of lost time; if a transect has already been ... krill which are used in models to estimate sustainable yield in Area 48. The survey design includes two ... large-scale oceanic strata: one in the southwest Atlantic located in the Scotia Sea, and the other to ... these large-scale strata, four mesoscale strata were included in the survey design; these were located ... and the planned cruise tracks for each of the four vessels participating in the survey are shown ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Author(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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Analysis of results from demersal fish surveys at South Georgia, undertaken by the United Kingdom and the USSR, January and February 1990
by the highest density in the middle stratum of western South Georgia, in which all the larger catches were made ... in the middle stratum of western South Georgia. A similar adjustment was made for the Hill Cove results at Shag ... 216264 Total 437261 Akademik Knipovich Survey divided into eastern and western South Georgia. Large ... haul analyzed separately. Stratum Eastern South Georgia 50 to 150m 2030 150 to 250 m 12103 250 ... discussions and analyses of the data from a survey from MV Hill Cove in January 1990 and RV Akademik Knipovich ... in February 1990 around South Georgia. Both surveys were characterized by large numbers of small ... increase in the estimated standing stock of Champsocephalus gunnari. The paper describes the ways in which ... these large hauls were considered in the analysis. No ideal method was found for incorporating the large ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 223–254 : Author(s): (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990)
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Diurnal variations in biological characteristics of krill, Euphausia superba Dana, to the west of the South Orkney Islands, 24 March to 18 June 1990 - based on data reported by a biologist-observer
, pa60TaBmero Ha npOMbICJIOBOM yt-IaCTKe OKOJIO lO:>KHbIX 0pKHeHCKHX O-BOB. Ha6JIIO,lleHH.5I BbInOJIH.5IJIHCb ... to the middle of June, 1990 (Table 1). At each station a series of catches was made using a standard commercial ... other. In the eastern area, where all other stations were carried out, diurnal variations ... . A very different pattern emerged at Station IV. Agreement between curves occurred in the middle ... Paper Title: Diurnal variations in biological characteristics of krill, Euphausia superba Dana ... biologist-observer Abstract / Description: Investigations of diurnal variations in the size composition of ... from March to June 1990. Observations at six daily stations were carried out in various locations ... trawl (9 to 12 tows per station, over one day). An increase in the total average size of animals caught ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Author(s): Vagin, A.V., R.R. Makarov and L.L. Menshenina
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Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
on both sides of the peninsula. Loss of ice on the eastern side results from warm air being brought over ... caused by intensification of the westerly winds has led to ice-shelf collapse along the eastern edge ... of the northern edge of the George VI ice shelf (67.840°W 71.692°S) which lost ~993 km2 over a number of years ... (72.500°W 70.416°S) which lost ~1 098 km2 in 1998 (Scambos et al., 2000); or it can be dramatic ... communities under ice shelves in the context of recent, rapid, regional climate change Abstract / Description ... : Recent rapid climate change is now well documented in the Antarctic, particularly in the Antarctic ... % of the Peninsula’s glaciers have retreated in recent decades. Further ice-shelf collapse will lead to ... the loss of existing marine habitats and to the creation of new habitats, with consequent changes in ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Author(s): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock
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Breeding numbers and success of Eudyptes penguins at Marion Island, and the influence of mass and time of arrival of adults
chrysolophus) over 26 years, as there was also for eastern rockhopper (E. chrysocome filholi) over 22 years ... at study colonies of macaroni penguins (Eudyptes chrysolophus) over 26 years, as there was also for eastern ... chrysolophus) over 26 years, as there was also for eastern rockhopper (E. chrysocome filholi) over 22 years ... (E. chrysolophus) and the eastern rockhopper pen- guin (E. chrysocome filholi). For both species, the numbers ... ), and eastern rockhopper penguins (Hull, 1999a). At Kerguelen Island, two closely-related species of prion ... Island, South Georgia, during incuba- tion macaroni penguins travelled long distances on foraging trips ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 175–190 : Author(s): Crawford, R.J.M., B.M. Dyer, J. Cooper and L.G. Underhill