Showing 11332 items
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
1 January, 1984 by Andrew Clarke
Available data on the lipid content and composition of the Antarctic krill Euphausia superba Dana are summarized. Female total lipid content increases during the summer as the ovary matures, and…Read more on Lipid content and composition of Antarctic krill, Euphausia superba Dana
1 January, 1984 by Andrew Clarke
The lipip content and composition of various tissues from three species of nototheniid fish from McMurdo Sound, Antarctic have been examined in relation to their habitat and buoyancy. The pelagic…1 January, 1984
A high frequency radio Doppler experiment was deployed in the Antarctic Peninsula region, centred on Argentine Islands (65°15′S, 64°16′W; L = 2.3), to investigate the morphology and sources of ionospheric…Read more on Large simultaneous disturbances (LSDs) in the Antarctic ionosphere
1 January, 1984
A 40 km line across George VI Ice Shelf was sounded in January 1981 by both radio echo and seismic reflection methods. Because the velocities of radio and seismic waves…Read more on Ice-shelf densities from a comparison of radio echo and seismic soundings
1 January, 1984
The extent and causes of pup mortality in the Antarctic fur seal, Arctocephalus gazella, were investigated at sites of high and low density at South Georgia. Mortality was greater at…1 January, 1984
Large numbers of pups of the Antarctic fur seal were weighed at regular intervals through their rearing period in six seasons between 1972 and 1981 at South Georgia. Growth rates…Read more on Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia
1 January, 1984
Methane was found to occur in all freshwater lakes, irrespective of trophic status, sampled during this preliminary investigation at Signy Island, South Orkney Islands, Antarctica. Methane accumulated in the water…1 January, 1984
The relationship between capillary density and mitochondrial volume density has been investigated for the slow trunk muscle of the haemoglobinless ‘Icefish’, Chaenocephalus aceratus Lönnberg. In general, for teleost slow muscles…Read more on Skeletal muscle capillary supply in a fish that lacks respiratory pigments
1 January, 1984
We present some results from a model of forced oscillations of the magnetosphere. The purpose of this work is to examine the effects and consequences of damping on geomagnetic pulsations…1 January, 1984
Analytical results for five different geomagnetic pulsation events which occurred between 0 and 10 UT on November 28, 1977 are presented. The periods and latitudinal characteristics of the pulsations recorded…1 January, 1984
Endoparasitic and predatory nematophagous fungi are widely distributed throughout the maritime Antarctic, being recorded along the Antarctic Peninsula as far south as 68° S. Fungi were recorded from 71% of…Read more on The distribution of nematophagous fungi in the maritime Antarctic
1 January, 1984
The variations of the diurnal range of the geomagnetic field with sunspot number and with magnetic activity was studied at mid and high latitude stations in the northern hemisphere at…1 January, 1984
The distribution of phytoplankton along transects amounting to about 10,000 nautical miles in the sector of the Southern Ocean between 20° and 70°W was determined during the austral summer of…1 January, 1984
Three grasses (Phleum alpinum L., Deschampsia antarctica Desv., Festuca contracta T. Kirk) and one perennial herb (Acaena tenera Alboff) are the earliest important colonizers of small-scale sorted stone stripes in…Read more on Plant colonization of actively sorted stone stripes in the subantarctic
1 January, 1984 by Richard Horne
During geomagnetic storms different partial pressure gradients in the auroral ionosphere may result in H+, He+, O+ and molecular ions drifting with different velocities along the Earth's magnetic field line.…Read more on The effects of differential ion flows on EISCAT observations in the auroral ionosphere
1 January, 1984
The breeding biology and population dynamics of the two species of giant petrels, Macronectes halli and M. giganteus, were studied at Bird Island, South Georgia during 1978–81. The mean laying…1 January, 1984
Moult scores were collected from colour‐ringed individuals of known reproductive status of the two species of giant petrel, Macronectes halli and M. giganteus, at Bird Island, South Georgia between 1978–81.…Read more on Moult of the giant petrels Macronectes halli and M. giganteus at South Georgia
1 January, 1984
More than two hundred recoveries of giant petrels Macronectes halli and M. giganteus originally ringed at Bird Island, South Georgia, were analysed to determine the nature of any interspecific differences…Read more on Movements of giant petrels Macronectes spp. ringed at South Georgia
1 January, 1984
During a survey of microfungi on the subantarctic island of South Georgia, large numbers of phylloplane yeasts were isolated in late spring from leaves of a tussock grass. The dominant…1 November, 1983
Diving depths of four breeding chinstrap penguins were recorded throughout complete foraging trips to sea lasting 18-48 h at Signy Island, South Orkney Islands. Deeper dives reached 70 m but…Read more on Diving depths of the Chinstrap Penguin Pygoscelis antarctica
1 January, 1983
Geomagnetic variation fields recorded at a particular location can be analysed to provide information on the distribution of induced currents within the Earth. An analysis of the variation fields on…Read more on The influence of tectonic boundaries on geomagnetic variations in the Scotia Sea
1 January, 1983 by William Block
Adaptations to the Sub-Antarctic climate of South Georgia were studied in four species of Coleoptera. in larvae and adults of Hydromedion sparsutum and Perimylops antarcticus (Perimylopidae) collected during summer, the…Read more on Low temperature adaptations in beetles from the Sub-Antarctic Island of South Georgia
1 January, 1983
Samples of mites and Collembola which had been acclimated at 5°C and provided with natural foods were cooled at four constant cooling rates: 1, 12 , 14 , 18deg min−1…Read more on Experimental studies on supercooling in two Antarctic micro-arthropods
1 January, 1983 by Andrew Clarke
Published data on the oxygen consumption, nitrogen excretion, feeding, growth and moulting physiology of the Antarctic krill, Euphausia superba, are reviewed with particular reference to experimental methodology and the value…1 January, 1983
The role of the sexes in incubation, their changes in body weight and associated energy costs were studied in the Wandering Albatross at South Georgia. Males incubate significantly more than…Read more on Energy costs of incubation in the Wandering Albatross Diomedea exulans
1 January, 1983
A multi-isotope approach has been applied to the origin of one of the largest and latest Newer Granite complexes of the Scottish Caledonides. Contributions from both mantle and unexposed late…1 January, 1983 by Alistair Crame
Malayomaorica malayomaorica is an important Upper Jurassic bivalve in the southern hemisphere: widely distributed in strata of Early - Middle Kimmeridgian age, it is a zone fossil of considerable potential…1 January, 1983
Age-specific fecundity data are presented for 17 yr of tagging and recapture of Leptonychotes weddelli at Signy Island, South Orkney Islands. Minimum age of first pupping was 2 yr, mean…Read more on Fecundity, survival and site fidelity in Weddell seals, Leptonychotes weddelli
1 January, 1983
Water turnover rates were measured in gentoo and macaroni penguins breeding sympatrically on South Georgia Island. At the time of this study, adult male macaronis were attending the nest while…1 January, 1983
The techniques for estimating hmF2 from M(3000)F2 are reviewed with particular stress put upon those in which the effects of underlying ionization are accounted for by a correction (ΔM) to…1 January, 1983
Case studies of the equatorward movement of the main F region trough are presented, using data recorded by a digital ionospheric sounder located at Halley Bay (76°S, 27°W; Λ =…Read more on Radio studies of the main F region trough in Antarctica
1 January, 1983
This series of papers comprises contributions to a symposium on the geography of the Falkland Islands, held at the Royal Geographical Society on 18 May 1982, with Lord Shackleton in…1 January, 1983
Certain Antarctic moss communities often have a pattern of concentric arcs or rings on their surfaces which can be up to 5 m in diameter. These are caused by fungal…Read more on Concentric fungal rings in antarctic moss communities
1 January, 1983
The lifetime of whistler ducts is determined in view of whistler data recorded over a 3-hour period at Sanae and Halley (L = 3.98 and 4.24, respectively) in South Africa,…1 January, 1983
Seasonal changes in nutrient concentrations, phytoplankton biomass and nutritional state were followed in two contrasting Antarctic lakes. Oligotrophic Sombre Lake receives little phosphate from its catchment and this limits the…1 January, 1983
My short note in an earlier issue of Polar Record [21(133): 394–95 (1983)] outlined events in the Falkland Islands Dependencies arising from the Argentinian attack and occupation of April 1982,…Read more on Hostilities in the Falkland Islands Dependencies March–June 1982
1 January, 1983
Giant petrels are the chief scavenging seabirds in the Southern Ocean. Quantitatively analysed regurgitations from chicks of both Macronectes halli and M. giganteus at Bird Island, South Georgia throughout the…1 January, 1983
The McAuliffe (1971) multiple equilibration technique has been used to measure the Henry's Law constants (H) for a variety of low molecular weight halocarbon gases in distilled and sea waters…1 January, 1983
Mucor hiemalis was frequently isolated from the litter of Poa flabellata where it apparently grows as a secondary sugar fungus in association with Chrysosporium pannorum.Read more on Association between Chrysosporium pannorum and Mucor hiemalis in Poa flabellata litter