Found 14035 items
1 January, 1977 by Andrew Clarke
The Antarctic benthic prawn Chorismus antarcticus (Pfeffer) was sampled regularly for a year and its total lipid content measured. Immature and transitional prawns had very variable lipid contents but similar…1 January, 1977
The present geographical position of the Ellsworth Mountains is geologically anomalous on account of their stratigraphy, which does not relate to western Antarctica, their structural trend, approximately perpendicular to the…Read more on Age and position of the Ellsworth Mountains crustal fragment, Antarctica
1 January, 1977
ICE ages and reversals of the Earth's magnetic field are two widely different geophysical phenomena; but they may be casually linked by the following mechanism. The moment of inertia of…Read more on A possible effect of ice ages on the Earth’s magnetic field
1 January, 1977
Elsevier Earth and Planetary Science Letters Volume 36, Issue 2, September 1977, Pages 253-262 Earth and Planetary Science Letters A geochemical study of island-arc and back-arc tholeiites from the Scotia…Read more on A geochemical study of island-arc and back-arc tholeiites from the Scotia Sea
1 January, 1977
Sediment samples taken at depths from 5 to 50 m in Borge Bay, Signy Island, Antarctica yielded purple (Chromatiaceae) and green (Chlorobiaceae) phototrophic bacteria when inoculated into Winogradsky columns or…1 January, 1977
Previous studies on fish Mg2+Ca2+ activated myofibrillar ATPases have been extended to species inhabiting diverse thermal environments. Cold adapted ATPases have considerably higher catalytic centred activities at low temperatures than…1 January, 1977
Studies have been carried out on the Mg2+ Ca2+-myofibrillar ATPase from the muscles of fish adapted to different environmental temperatures. The thermal stability of the ATPase is strongly correlated with…1 January, 1977
Six main British Antarctic Survey stations were occupied throughout the year. Of these, Adelaide air base on Adelaide Island was closed down at the end of the summer, as it…1 January, 1977 by Andrew Clarke
Following a shift from autotrophic to heterotrophic nutrition, cells of Chlorella protothecoides become sensitive to the stresses of freezing and thawing. The injury then observed at slow rates of cooling…1 January, 1977
O'HARA1 has recently proposed an open-system model for the fractional crystallisation of magmas involving continual replenishment of the magma chamber and only partial extraction of the fractionated liquid at each…Read more on Open system crystal fractionation and incompatible element variation in basalts
1 January, 1977
Following current interpretation of isotope data from oceanic basalts, the case for inheritance of Rb/Sr and 87Sr/86Sr ratios in continental igneous rocks from long-lived heterogeneities in the mantle is reviewed,…Read more on Strontium isotope evidence for mantle events in the continental lithosphere
1 January, 1977
The growth of two Antarctic lamellibranchs, Adamussium colbecki (E.A. Smith) and Laternula elliptica (King and Broderip), has been investigated. A. colbecki is a pectinid that grows to a shell height…Read more on Growth of two Antarctic lamellibranchs: Adamussium colbecki and Laternula elliptica
1 January, 1977
An analysis is made of the disturbance in conductive heat flow caused by drilling a bore hole in ice in which there is a vertical temperature gradient. The model used…1 January, 1977
The Larsen Harbour Formation of southern South Georgia is part of an ophiolite sequence of submarine lavas and sheeted dykes emplaced into metasedimentary country rocks. The metasediments are remnants of…Read more on The occurrence of Mesozoic oceanic floor and ancient continental crust on South Georgia
1 January, 1977
The bibliography lists 166 references on the paleontology of Lesser Antarctica and the Scotia Ridge. It aims to identify all the paleontological discoveries made and to list all the major…Read more on An annotated bibliography of the paleontology of Lesser Antarctica and the Scotia Ridge
1 January, 1977
We have found fossil angiosperm leaves more than 1,000 km further south than any other previously reported. Specimens were obtained in situ by R. W. B. from tuffs in a…1 January, 1977
Analysis of wind-speed measurements made over a six-month period on an Antarctic glacier showed that conditions near the surface were dominated by gravity winds flowing downhill. In such conditions there…1 January, 1976
A summary is given of comparative work carried out within the I.B.P. Tundra Biome at an Arctic station (Greenland) and a sub-Antarctic station (South Georgia). The investigations covered many aspects…1 January, 1976
(1) Six annual agricultural species were grown in summer at South Georgia (54⚬S) and in the winter-spring growing season at Melbourne (38⚬S). (2) The mean daily air temperature at South…Read more on Development and growth of some agricultural species on a subantarctic island
1 January, 1976 by William Block
Oxygen consumption rates of the minute terrestrial mite, Nanorchestes antarcticus Strandtmann were measured at +5°C with a Cartesian Diver microrespirometer. Individual respiration rates were in the range 0.156 (deutonymphy) to…Read more on Oxygen uptake by Nanorchestes antarcticus (Acari)
1 January, 1976
The British Antarctic Survey (BAS) has relied on sledge dogs as the main form of transport for field parties since its predecessor, the Falkland Islands Dependencies Survey (FIDS), imported them…1 January, 1976
Six species are described and compared with related algae. All were isolated in culture from terrestrial habitats on Signy Island, South Orkney Islands, Antarctica. They are: Botrydiopsis constricta sp. nov.…1 January, 1976
Studies of plants growing in tundra regions have tended to concentrate either upon whole plant communities or upon the physiology and metabolism of above- or below-ground plant organs considered separately.…Read more on Strategies of growth and population dynamics of tundra plants. 1. Introduction
1 January, 1976 by Andrew Clarke
The stomach oil produced by many marine birds of the order Procellariiformes is an important aspect of their breeding ecology. Fifty-seven samples of stomach oil from six species of subantarctic…1 January, 1976
The pattern of growth of Polytrichum alpestre Hoppe, a common moss in the maritime Antarctic, is described. It may form extensive communities, sometimes growing with another moss, Chorisodontium aciphyllum (Hook.…1 January, 1976
An ice shelf is a floating ice sheet, attached to land where ice is grounded along the coastline. Nourished both by surface snow accumulation and by glaciers and ice sheets…Read more on Thermodynamics of the interaction between ice shelves and the sea
1 January, 1976
A comparison has been mager between ice velocities that were measured by the radio-echo technique and by a survey method on the Devon Island ice cap, Arctic Canada (lat. 75°…Read more on A further comparison of glacier velocities measured by radio-echo and survey methods
1 January, 1976
Results of analysis of the diurnal variations of hmF2 for Argentine Islands (65°15'S, 64°16'W) and Halley Bay (75°30'S, 26°40'W) are presented. It is shown that, for summer months, the diurnal…1 January, 1976
Median height distributions of electron concentration may be determined from ionograms by means of the composite ionogram technique of Wright, or by inserting tabulated parameters in the idealized model of…1 January, 1976
The past ten years have seen a greatly increased interest in the Antarctic krill Euphausia superba Dana (Fig 1). In particular there have been several Russian expeditions whose main aim…Read more on Antarctic krill: a reappraisal of its distribution
1 January, 1976
The British Arctic Expedition sailed from Portsmouth on 29 May 1875. It left amid considerable public enthusiasm and with a telegram from the Queen. A contemporary journal had this to…