Showing 11205 items
1 January, 1982
Summer profiles of sea-water temperature, salinity and flow were obtained on George VI Ice Shelf near its northern ice front. At each depth, temperature salinity and density show little variation…Read more on Oceanographic observations from George VI Ice Shelf, Antarctic Peninsula
1 January, 1982
Several species of serolid isopod from Signy Island, South Orkney Islands and also from South Georgia were studied, and aspects of their reproductive behaviour and associated morphology are discussed. InSerolis…Read more on The reproductive biology of some serolid isopods from the Antarctic
1 January, 1982
The aggressive and maternal behaviours of 44 individually marked female southern elephant seals, Mirounga leonina, were studied at South Georgia. Evidence of dominance and subordination could be determined in only…Read more on Aggressive and maternal activities of female southern elephant seals (Mirounga leonina)
1 January, 1982
The pattern of growth, timing and magnitude of seasonal changes in body weight and condition were compared between male and female reindeer. The data were derived from 300 animals shot…1 January, 1982 by Andrew Clarke
Incorporation of 14C‐leucine and 3H‐alanine into TCA‐precipitable protein, TCA‐soluble protein, and antifreeze glycoproteins (AFGP) was measured in isolated hepatocytes from Pagothenia borchgrevinki Boulenger following acclimation to −1.5°C and + 4°C.…1 January, 1982
Thirty-five new Rb-Sr whole-rock and mineral isochrons are reported for igneous rocks from Graham Land. Magmatism was essentially continuous but peaks of activity occurred in early Jurassic, early Cretaceous, late…1 January, 1982
As part of the Glaciology of the Antarctic Peninsula (GAP) programme, the snow cover at 25 stations was sampled to 10 m depth for oxygen–isotope and total β-radioactivity analysis. The…1 January, 1982 by Eric Wolff
A snow-pit and hand-drilled core have been sampled at Spaatz Island in the Antarctic Peninsula to obtain evidence on the importance of short-term fluctuations of heavy metal (Cd, Cu, Pb,…1 January, 1982
Systematic observations were made on reindeer feeding behaviour during 1973–74, and seven phanerogams and three bryophytes were selected for sampling during the following year. Material of the principal plant species…Read more on Seasonal trends in chemical composition of reindeer forage plants on South Georgia
1 January, 1982
A georesistivity survey was made on part of George VI Ice Shelf (71°55'S, 67°20'W). The principal objectives were to determine the electrical structure of the 1ce shelf, in particular how…Read more on Electrical resistivity of George VI Ice Shelf, Antarctic Peninsula
1 January, 1982 by Michael Pinnock
A new method for monitoring the position and movement of large ionospheric structures is described. The technique uses data from an ionosonde nominally operating at vertical incidence, but relies on…Read more on Movements of the mid-latitude ionospheric trough
1 January, 1982
Population structure and growth of Philine gibba Strebel have been examined using weight- and length-frequency analyses. The population consisted of five year classes but the 4th and 5th year classes…Read more on Population dynamics of the antarctic opisthobranch Philine gibba Strebel
1 January, 1982
Duct coupling, in which part of the energy of a downcoming whistler-mode wave becomes trapped in a different duct after upward reflection in the ionosphere, manifests itself in the phenomenon…1 January, 1982
75 taxa of Protozoa (18 flagellates, 9 naked rhizopods, 20 testate rhizopods and 28 ciliates) were found in 14 samples of mineral materials, peats, soils and guano collected from the…Read more on The terrestrial Protozoan fauna of South Georgia
1 January, 1982
The grounding-line region of Rutford Ice Stream was surveyed from the ground during 1978–79 and 1979–80, and from the air in 1980–81. Maps of surface elevation and ice thickness of…1 January, 1982
Part of an ophiolite sequence and pre-Jurassic continental basement rocks are remnants of the composite floor of the Cretaceous back-arc basin system on South Georgia. The partially preserved ophiolite consists…Read more on The composite floor of the Cretaceous back-arc basin of South Georgia
1 January, 1982
The directions of propagation, in the earth-ionosphere waveguide, of multi-component two-hop whistlers recorded on 10 July 1972 by four VLF goniometer receivers in eastern Canada have been determined. Using the…Read more on Multi-station VLF direction-finding measurements in eastern Canada
1 January, 1982 by William Block
The cold hardiness of two Antarctic species of Collembola, Cryptopygus antarcticus Willem and Parisotoma octooculata (Willem), was studied in field fresh, starved and low temperature acclimated specimens at Signy Island,…Read more on Cold hardiness of Collembola at Signy Island, maritime Antarctic
1 January, 1982
The Cumberland Bay Formation on South Georgia (South Atlantic) is an Upper Jurassic–Lower Cretaceous andesitic turbidite sequence >8 km thick, derived from a contemporary volcanic are and deposited in part…1 January, 1982
New K-Ar and Rb-Sr data are presented for the age of part of the supposed late Palaeozoic/early Mesozoic metamorphic complex in West Antarctica (here renamed the ‘Scotia metamorphic complex’). These…1 January, 1982
The diet of the Light-mantled Sooty Albatross Phoebetria palpebrata breeding at South Georgia is described on the basis of quantitative analysis of thirtyseven food samples from chicks and nine from…Read more on The food and feeding ecology of the light-mantled sooty albatross at South Georgia
1 January, 1982
Ammonite-bearing Jurassic and Cretaceous sedimentary successions are well developed in the Antarctic Peninsula and the Magallanes Basin of Patagonia. Faunas of middle Jurassic-late Cretaceous age are present in Antarctica but…Read more on A comparison of the ammonite faunas of the Antarctic Peninsula and Magallanes Basin
1 January, 1982
Cheus annae, new genus, new species, is described and figured. Comparisons with the Phoxocephalidae, Urothoidae, Platyischnopidae, Haustoriidae, and Pontoporeiidae show many characters in common, particularly with the first three families.…1 January, 1982
Equipment suitable for measuring temperature, solar radiation, humidity, and wind speed is reviewed together with problems encountered during field use in cold climates. The importance of matching the type of…1 January, 1982
South Georgia, at present governed as a Dependency of the Falkland Islands, has an interesting history of human activity extending back nearly two centuries. The sealers who visited the island…1 January, 1982
Marine planktonic primary production was studied in Borge Bay, Signy Island, the Antarctic, during the period January 1972–February 1974. Productivity was measured in situ by the radiocarbon uptake method. In…Read more on Primary production of phytoplankton off Signy Island, South Orkneys, the Antarctic
1 January, 1982
Seasonal variations in temperature and moisture in moss peat were monitored in the field at Signy Island, Antarctica. When simulated in intact peat cores in vitro after frozen storage, these…Read more on Simulation of seasonal changes in microbial activity of maritime antarctic peat
1 January, 1981
Populations of Serolis polita Pfeffer and S. cornuta Studer were studied over a continuous period of 2 yr at Signy Island, South Orkney Islands. Moult classes were recognized by a…1 January, 1981 by William Block
(1) Two superficially similar chalk grasslands in the Breckland of East Anglia provided very different habitats for the abundant terrestrial isopod Armadillidium vulgare (Latreille). At Lakenheath Warren the site was…Read more on Population ecology of a terrestrial isopod in two breckland grass heaths
1 January, 1981
Peripheral blood and haemopoietic tissues of spleen and kidney of the icefish, Chaenocephalus aceratus were examined using LM and EM techniques. The peripheral blood contained cellular elements from all the…1 January, 1981
The Malvernian igneous complex of the Malvern Hills consists mainlyof plutonic rocks and their locally deformed equivalents. The igneous rocks are calc-alkaline and range from ultra mafic diorite to granite…Read more on Rb-Sr whole-rock isochron evidence for the age of the Malvern Hills complex
1 January, 1981
Bottom melting rates have been calculated for a large number of sites on George VI Ice Shelf from measurements of its kinematic behaviour. No simple explanation for the melt-rate pattern…Read more on Bottom melting under George VI Ice Shelf, Antarctica
1 January, 1981 by William Block
The main features of the cold hardiness strategies adopted by Antarctic terrestrial arthropods (principally Acari and Collembola) are reviewed. These include lethal low temperatures, chill-coma temperature, supercooling ability, cryoprotectants and…1 January, 1981 by William Block
Cold environments impose several ecological and physiological constraints upon arthropods, including reduction of metabolic rate, locomotory activity, and feeding. These result in slow growth rates and extended life cycles. Additionally,…1 January, 1981
Krill fishing in the Southern Ocean has raised in acute form the question of wildlife conservation in Antarctica: what will be the effect on the ecosystem? how much krill can…1 January, 1981
Variations in the rate of moulting and of faecal pellet production by Cryptopygus antarcticus (Willem), collected from Signy Island in the maritime Antarctic, were measured over temperatures of 0° to…Read more on Feeding and growth in the Antarctic collembolan Cryptopygus antarcticus
1 January, 1981
1. The biomasses of free-living soil nematodes from a moss turf and a moss carpet, two contrasting bryophyte ecosystems in the maritime Antarctic, are analysed and compared with other tundra…1 January, 1981
1. Previous measurements of energy intake on sledging journeys in Antarctica have given a mean intake of 14.2 MJ (Acheson, 1974; Campbell, 1975), markedly lower than values reported earlier (see…1 January, 1981
1. Eighteen male sledge dogs were weighed immediately on removal from their sheltered winter quarters at Halley Bay, Antarctica (75° 31′s, 26° 42′W) and weekly thereafter for 14 weeks. The…1 January, 1981 by Andrew Clarke
Samples of marine benthic invertebrates collected from two sites in the Antarctic have been analysed for both aliphatic and aromatic hydrocarbons in order to establish baseline concentrations for some classes…1 January, 1981
Ice-thickness and surface-elevation data gathered from radio echo flights over the Antarctic Peninsula are presented as profiles for five major outlet glaciers in northern Palmer Land and as contour maps…Read more on Subglacial morphology in northern Palmer Land, Antarctic Peninsula
1 January, 1981 by Alistair Crame
The genus Anopaea represents a small but distinctive group of inoceramid bivalves that apparently remained functionally endobyssate. The somewhat unusual morphology (for an inoceramid) probably results from structural modifications tofacilitate…Read more on The occurrence of Anopaea (Bivalvia: Inoceramidae) in the Antarctic Peninsula
1 January, 1981
Late Triassic Radiolaria have been recovered from a bedded chert collected early in 1977 in the South Orkney islands. This is the first reliable palaeontological evidence for the age of…1 January, 1981
Two bryophyte—dominated communities in the maritime Antarctic are analyzed in terms of the transfer and standing crops of organic matter within them. A moss turf dominated by Polytrichum alpestre and…Read more on Structure and function of two Antarctic terrestrial moss communities
1 January, 1981
The polarization behaviour of radio waves which have been transmitted and reflected at or near normal incidence in an ice sheet can be explained if the ice is assumed to…1 January, 1981
A layer of moraine within the Antarctic ice sheet has been detected in the course of airborne radar ice soundings. The moraine was injected at the margin of the ice…Read more on Tracing particle paths in the Antarctic ice sheet
1 January, 1981
In an earlier paper (Green and Hamilton, J. atmos. terr. Phys.40, 1223, 1978), we reported on a preliminary analysis of six months' magnetic data from the conjugate stations St. Anthony…Read more on An ionospheric effect on the conjugate relationship of Pi2 magnetic pulsations
1 January, 1981
We infer that the Trinity Peninsula Group of the Antarctic Peninsula was deposited in a fore-arc basin(s) of composite type located between the Gondwanian arc massif (consisting of plutonic and…1 January, 1981
The Earth's plasmapause is a source of natural radio emission in the myriametric wavelength range (λvac∼10 km) and several mechanisms have been proposed for its generation. One such theory advocates…Read more on First remote sensing of the plasmapause by terrestrial myriametric radiation
1 January, 1981
Heavy metal variations in polar ice cores may reflect changes in global airborne pollution1. Reported profiles from Antarctica1–3 and Greenland4, where sampling resolution was normally larger than a year, have…Read more on Short-term fluctuations in heavy metal concentrations in Antarctic snow