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Current, temperature, and salinity beneath George VI Ice Shelf, Antarctica
1 January, 1984
Speed, direction, temperature, and conductivity were recorded from February to July 1980 within the thermocline near the northern ice front of George VI Ice Shelf. There were no significant changes…Read more on Current, temperature, and salinity beneath George VI Ice Shelf, Antarctica
Filtration rates of Euphausia superba Dana: under- or overestimates?
1 January, 1984
Filtration rates of adolescent Euphausia superba obtained by both constant volume and flow-through techniques are presented. Filtration rate data for a range of particle sizes are presented. An increase in…Read more on Filtration rates of Euphausia superba Dana: under- or overestimates?
Feeding of krill around South Georgia. II. Relations between feeding activity, environment and vertical distribution
1 January, 1984 by Peter Ward
Relations between a model of the feeding activ- ity of Euphausia superba, the oceanic environment and the vertical distribution of krill around South Georgia are described. Krill with full alimentary…Oxygen consumption of five species of fish from south Georgia
1 January, 1984
The oxygen consumption rates of five species of sub-Antarctic fish, Notothenia rossii Fischer, 1885; Notothenia angustifrons Fischer, 1885; Notothenia nudifrons Lonnberg, 1905; Trematomus hansom Boulenger, 1902; and Harpagifer georgianus Richardson,…Read more on Oxygen consumption of five species of fish from south Georgia
Cold shock injury in Tetrahymena pyriformis
1 January, 1984 by Andrew Clarke
The ciliated protozoan Tetrahymena pyriformis has been used to study the biochemistry of cellular injury induced by rapid cooling (cold shock). Cellular viability was found to depend on the time…Isotopic tracers in polar seas and glacier ice
1 January, 1984
The relationship between isotope concentration and salinity provides important evidence on the origin of water masses. In polar regions it can be used to deduce the isotopic composition of melting…Scaling of foraging radius and growth rate in petrels and albatrosses (Procellariiformes)
1 January, 1984
Data are assembled from a number of sources on several species of Procellariiformes breeding on South Georgia, covering the amount, frequency and energetic content of feeds brought to the young,…Glaciological and oceanographic calculations of the mass balance and oxygen isotope ratio of a melting ice shelf
1 January, 1984
Glaciological estimates of the ice supply to George VI Ice Shelf are obtained by integrating the accumulation over the catchment. The basal melt (or possible shelf thickening) rates for the…Automated measurement of meal sizes and feeding frequency in albatrosses
1 January, 1984
An artificial nest incorporating an automated weighing device, suitable for chick growth studies on some species of seabirds, is described. (2) The operating weight range is 1-7 kg, with an…Read more on Automated measurement of meal sizes and feeding frequency in albatrosses
Activity budgets of foraging gray-headed albatrosses
1 January, 1984
Activity recorders were attached to 13 Gray-headed Albatrosses (Diomedea chrysostoma) rearing chicks at South Georgia in February 1982. During foraging trips to sea totalling 284 bird-days, an average of 74%…Read more on Activity budgets of foraging gray-headed albatrosses
Electrical resistivity of ice from the Antarctic Peninsula, Antarctica
1 January, 1984
Georesistivity soundings have been carried out at four sites in the Antarctic Peninsula. The objective of the work was to investigate the electrical behaviour of ice from an area where…Read more on Electrical resistivity of ice from the Antarctic Peninsula, Antarctica
Estimation by use of field weighings of metabolic rate and food conversion efficiency in albatross chicks
1 January, 1984
A knowledge of the assimilation of food and of the energetic demands of chicks at different stages in the growth period can provide a basis for understanding growth strategies of…Spread-F ionospheric irregularities and their relationship to stable auroral red arcs at magnetic mid-latitudes
1 January, 1984
The signature of the stable auroral red arc (SAR arc) as it appears on ionograms is described. The key features are a very significant increase in the amount of spread-F…Dawn-dusk (y) component of the interplanetary magnetic field and the local time of the harang discontinuity
1 January, 1984 by Michael Pinnock
We describe a simple method for determining the time at which the meridian of a sub-auroral magnetic observatory crosses that of the Harang discontinuity—the separation of the eastward and westward…Accelerating flow of the Brunt Ice Shelf, Antarctica
1 January, 1984
Position fixes made at the British Antarctic Survey station, Halley, on the Brunt Ice Shelf are considered for the period 1968–82. These show an initial westward velocity of approximately 400…Read more on Accelerating flow of the Brunt Ice Shelf, Antarctica
Beauchêne Island: a historical account
1 January, 1984
Southernmost of the Falkland Islands, Beauchêne Island (52° 54' S, 59° 09' W, area 3 km2) is a wildlife reserve with large colonies of Black-browed albatrosses and Rockhopper penguins. Discovered…An extraordinary peat-forming community on the Falkland Islands
1 January, 1984
Most of Beauchêne Island in the South Atlantic is covered by tussac, the tussock-forming grass Poa flabellata (Lam.) Rasp., which has produced a deep accumulation of exceptionally dense peat during…Read more on An extraordinary peat-forming community on the Falkland Islands
Glacier flexure and the position of grounding lines: measurements By tiltmeter on Rutford Ice Stream, Antarctica
1 January, 1984
Two methods were used to locate the grounding line on the Rutford Ice Stream. The first method determined where the glacier was floating in hydrostatic equilibrium, while the second method…Processes of formation and filling of a Mesozoic back-arc basin on the island of South Georgia
1 January, 1984
South Georgia contains a diverse suite of rocks representing different stages in the development of a back-arc basin on the Gondwana margin during the Mesozoic. Basin formation initially involved intrusion…Ecophysiology of two intertidal mites at South Georgia
1 January, 1984 by William Block
The resistance of Halozetes marinus (Cryptostigmata) and Hyadesia maxima (Astigmata) to cold and heat, to submergence in water and to anoxia was studied to determine their adaptations to the intertidal…Read more on Ecophysiology of two intertidal mites at South Georgia
Excitation of the lower oblique resonance by an artificial plasma jet in the ionosphere
1 January, 1984
Aboard the Porcupine rockets, bursts of noise were detected in the electron whistler range during the operation of a xenon plasma gun on a package ejected from the main payload.…Read more on Excitation of the lower oblique resonance by an artificial plasma jet in the ionosphere
Laboratory studies of predation by the Antarctic mite Gamasellus racovitzai (Acarina: Mesostigmata)
1 January, 1984
Laboratory investigations of predation by Gamasellus racovitzai (Acarina: Mesostigmata) on Cryptopygus antarcticus (Insecta: Collembola) are described. The predator appeared to search at random, but, when contact with prey had been…A dipteran from south of the Antarctic Circle: Belgica antarctica (Chironomidae) with a description of its larva
1 January, 1984
Belgica antarctica Jacobs is recorded for the first time from two localities south of the Antarctic circle: Orford Cliff (66°55'S) on the Continental mainland and the Refuge Islands (68°21'S). The…Introduced reindeer and their effects on the vegetation and the epigeic invertebrate fauna of South Georgia (subantarctic)
1 January, 1984
The introduced reindeer of South Georgia have had a serious impact on the vegetation throughout the range of three populations on the island. Exclosure experiments in areas where the reindeer…Aspects of the biology of Antarctomysis maxima (Crustacea: Mysidacea)
1 January, 1984 by Peter Ward
Population structure and aspects of the reproductive biology of Antarctomysis maxima from South Georgia and the South Orkney Islands were examined. Size frequency analysis indicated that the generation time is…Read more on Aspects of the biology of Antarctomysis maxima (Crustacea: Mysidacea)
A two-phase model of electrical conduction in polar ice sheets
1 January, 1984 by Eric Wolff
It has been suggested that the dc conductivity of polar ice sheets could be due to the presence of liquid layers at the grain boundaries. These layers would consist of…Read more on A two-phase model of electrical conduction in polar ice sheets
Comparative respirometry of peat decomposition on a latitudinal transect in the maritime Antarctic
1 January, 1984
The hypothesis that moss peat respiration in the maritime Antarctic was dependent more on edaphic conditions, substrate quality and microflora than latitude was broadly supported by studies on a 14°…Leptoglossum omnivorum sp.nov. from Antarctica
1 January, 1984
Leptoglossum omnivorum sp.nov. is proposed and compared with other species of the genus Leptoglossum Karst., together with species formerly included in Mniopetalum Donk & Singer.Pathology of the antarctic fur seal (Arctocephalus gazella) in South Georgia
1 January, 1984
This paper reports the post-mortem findings in 135 wild Antarctic fur seal pups which died of natural causes. The predominant lesions were those associated with starvation, trauma to the head…Read more on Pathology of the antarctic fur seal (Arctocephalus gazella) in South Georgia
An early miocene ridge crest-trench collision on the South Scotia Ridge near 36°W
1 January, 1984 by Ed King
Preliminary interpretation of marine geophysical data and geochemical analyses of dredged rocks has led to the identification of a ridge crest-trench collision zone southeast of the South Orkney Islands. The…Read more on An early miocene ridge crest-trench collision on the South Scotia Ridge near 36°W
An insect introduction to the maritime Antarctic
1 January, 1984 by William Block
Although several invertebrates have been introduced by Man into the Antarctic, no holometabolous insects have survived to colonize terrestrial habitats successfully. Data are presented on the survival of populations of…Read more on An insect introduction to the maritime Antarctic
Seals of the Galapagos Islands
1 January, 1984
The Galapagos archipelago has been colonized by two species of otariid, the fur seal, Arctocephalus galapagoensis, and the sea lion, Zalophus californianus wollebaeki. The former probably arrived from South America…The respiratory responses of the dog cockle Glycymerisglycymeris (L.) to declining environmental oxygen tension
1 January, 1984
The subtidal bivalve Glycymeris glycymeris (L.) exhibits a high degree of respiratory independence in conditions of declining environmental oxygen tension. In contrast to other bivalves previously studied, the index of…The population dynamics of Notothenia rossii from South Georgia (Antarctica)
1 January, 1984
The population dynamics of nearshore juvenile Notothenia rossii were studied at South Georgia during 1978 and 1979. Mortality of the population was calculated from length-class abundance of fish sampled by…Read more on The population dynamics of Notothenia rossii from South Georgia (Antarctica)
Energy partitioning in the Antarctic collembolan Cryptopygus antarcticus
1 January, 1984
1. Consumption, production and assimilation rates were determined for two age groups of Crypropygus antarcticus to give an estimate of energy utilization, and to investigate low temperature adaptation in its…Read more on Energy partitioning in the Antarctic collembolan Cryptopygus antarcticus
Life cycle strategies in two Antarctic Collembola
1 January, 1984
1. Populations of two coexisting Antarctic Collembola were studied in the field and under constant conditions in the laboratory to determine their life cycles and to compare their energy utilisation.…Read more on Life cycle strategies in two Antarctic Collembola