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Estudio de la Edad en una población virginal de Notothenia gibberifrons (Pisces:Nototheniidae) de Bahia South, Antartica
1 January, 1985
The age of individuals Notothenia gibberifrons Lönnberg was determined for a sample from an unexploited population collected at South Bay ,Palmer Archipelago. Elsewhere in the Antartic this species has been…The structural evolution of George VI sound, Antarctic Peninsula
1 January, 1985
George VI Sound, 400 km long and between 25 and 90 km wide, separates Alexander Island from the Antarctic Peninsula. The straight parallel sides of its northern section and sub-parallel…Read more on The structural evolution of George VI sound, Antarctic Peninsula
Lower Cretaceous inoceramid bivalves from the Antarctic Peninsula region
1 January, 1985 by Alistair Crame
The occurrence of rich faunas of Lower Cretaceous inoceramid bivalves in the Antarctic Peninsula region further emphasizes their widespread distribution, and enhances their potential for regional biostrati-graphic correlations. The Antarctic…Read more on Lower Cretaceous inoceramid bivalves from the Antarctic Peninsula region
Fur seal diving behaviour in relation to vertical distribution of krill
1 January, 1985
Quantitative studies of predator-prey interactions depend on a knowledge of their spatial dynamics and behaviour. Studies on marine vertebrates have hitherto been precluded by the difficulty of acquiring the relevant…Read more on Fur seal diving behaviour in relation to vertical distribution of krill
The diet of the Southern rockhopper penguin Eudyptes chrysocome chrysocome at Beauchene Island, Falkland Islands
1 January, 1985 by Peter Ward
The diet of the Southern rockhopper penguin at Beauchene Island, Falkland Islands, was studied in the early chick‐rearing period by quantitative analysis of adult stomach contents. Juvenile squid (Teuthowenia sp.)…Trace elements in Antarctic air and snowfall
1 January, 1985
Measurements of trace elements in snow and ice are frequently used to describe past atmospheric composition although there is no firm basis for assuming a direct connection. Trace-element concentrations have…Flow law for ice in polar ice sheets
1 January, 1985 by Eric Wolff
Theories of glacier flow are based commonly on the assumption that ice is not a newtonian fluid, but has a non-linear stress-dependent viscosity1–5. Here we re-examine the spreading of Antarctic…Spatial structure of high latitude sporadic E
1 January, 1985
Observations of high latitude types of sporadic E, Es, have been made at Halley, Antarctica (76°S, 27°W; L = 4.2) using a modern digital ionosonde with a direction finding capability.…The winged Antarctic midge Parochlus steinenii (Gerke) (Diptera: Chironomidae) in the South Shetland Islands
1 January, 1985
The morphological variation of adult Parochlus steinenii (Gerke) is described from measurements of two populations from the South Shetland Islands. Morphologically, the population from Ardley Island is significantly larger than…Large losses of total ozone in Antarctica reveal seasonal ClOx/NOx interaction
1 January, 1985 by Jonathan Shanklin
Recent attempts1,2 to consolidate assessments of the effect of human activities on stratospheric ozone (O3) using one-dimensional models for 30° N have suggested that perturbations of total O3 will remain…Read more on Large losses of total ozone in Antarctica reveal seasonal ClOx/NOx interaction
Ozone photochemistry in the Antarctic stratosphere in summer
1 January, 1985
Ozone photochemistry over Antarctica in summer has been examined using a 1‐D model. With diffusive transport alone, the predicted ozone decay rates from the December (summer) solstice to the March…Read more on Ozone photochemistry in the Antarctic stratosphere in summer
Breeding of the Trindade Petrel Pterodroma arminjoniana on Round Island, Mauritius
1 January, 1985
Round Island (19°51'S, 57°47'E), an uninhabited volcanic islet lying 14 miles NNE of the Mauritian mainland, provides locally important breeding grounds for four species of seabirds; the Trindade Petrel Pterodroma…Read more on Breeding of the Trindade Petrel Pterodroma arminjoniana on Round Island, Mauritius
Storage carbohydrate production and overwintering strategy in a winter-green tussock grass on South Georgia (Sub Antarctic)
1 January, 1985
Water-soluble and ethanol-soluble carbohydrates were extracted from leaves, shoots, roots, rhizomes and flowers ofParodiochloa flabellata (Lam.) Rasp. (=Poa flabellata (Lam.) Hook f.) throughout a growing season. Very high levels of…Light climate and phytoplankton photosynthesis in maritime Antarctic lakes
1 January, 1985
The responses of phytoplankton populations to seasonal changes in radiation flux in two Antarctic lakes with extensive winter ice-cover are described. A phytoplankton capable of photosynthesis was found throughout the…Read more on Light climate and phytoplankton photosynthesis in maritime Antarctic lakes
The role of prolactin during incubation: Comparative studies of three Diomedea albatrosses
1 January, 1985
There is much recent evidence that prolactin is an important influence on parental and incubatory behaviour in birds. In this study prolactin was measured at various stages of the breeding…The absence of krill from the South Georgia zone, winter 1983
1 January, 1985
An extremely low abundance of the Antarctic krill, Euphausia superba, was observed in the Scotia Sea during the austral winter of 1983. The decline could not be attributed to any…Read more on The absence of krill from the South Georgia zone, winter 1983
Conservation and protection of marine mammals: past, present and future
1 January, 1985
This paper reviews some of the major issues, programs and events that have led to the current state of marine mammal populations, management goals and management programs worldwide. It notes…Read more on Conservation and protection of marine mammals: past, present and future
Mid-latitude Pi 2 pulsations, geosynchronous substorm onset signatures and auroral zone currents on March 22, 1979: CDAW 6
1 January, 1985
We relate the mid‐latitude Pi 2 pulsation signatures observed using the Air Force Geophysics Laboratory Magnetometer Network during the March 22, 1979, Sixth Coordinated Data Analysis Workshop interval to the…The effects of freeze-thaw cycles and leaching on the loss of soluble carbohydrates from leaf material of two subantarctic plants
1 January, 1985
Leaves and litter of two phanerogams (Acaena magellanica (Lam.) Vahl and Poa flabellata (Lam.) Hook. f.) were collected in spring on the subantarctic island of South Georgia. Leaves immersed in…Submarine glide blocks from the Lower Cretaceous of the Antarctic Peninsula
1 January, 1985
Isolated exotic blocks of late Jurassic age occur within an undeformed succession of marine Lower Cretaceous back‐arc basin deposits on the west coast of James Ross Island, Antarctica. These flat,…Read more on Submarine glide blocks from the Lower Cretaceous of the Antarctic Peninsula
The genus Thalassiosira (Bacillariophyceae): studies on species occurring south of the Antarctic Convergence Zone
1 January, 1985
Species of the genus Thalassiosira are abundant in the oceanic waters south of the Antarctic Convergence Zone. Species within the genus are differentiated on the basis of arrangement and density…Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish
1 January, 1985
1. Single fast fibres were isolated from the myotomal muscles of icefish (Chaenocephalus aceratus Lönnberg, Antarctica), North Sea Cod (Gadus morhua L.) and Pacific Blue Marlin (Makaira nigricans Wakiya, Hawaii).…Contractile and metabolic characteristics of muscle fibres from Antarctic fish
1 January, 1985
Contractile properties were determined for muscles from three species ofAntarctic fish with broadly similar activity patterns:Trematomus hansoni, Notothenia rossii and Chaenocephalus aceratus. C. aceratus differs from theother species in that…Read more on Contractile and metabolic characteristics of muscle fibres from Antarctic fish
The comparative breeding biology of Adelie and Chinstrap Penguins Pygoscelis adeliae and P. antarctica at Signy Island, South Orkney Islands
1 January, 1985
Adélie Penguins and Chinstrap Penguins breed in abundance at Signy Island, South Orkney Islands, which is near the northern breeding limit of the former but in the centre of the…The food and feeding ecology of Adélie penguins (Pygoscelis adeliae) and Chinstrap penguins (P. antarctica) at Signy Island, South Orkney Islands
1 January, 1985
Adélie Pygoscelis adeliae and Chinstrap P. antarctica penguins are important consumers of Southern Ocean marine resources. The stomach contents of adult penguins at Signy Island, South Orkney Islands, were analysed…Orientation studies of waterlogged wood: A paleocurrent indicator?
1 January, 1985
Fossil wood has been used extensively as a paleocurrent indicator, and published evidence suggests that it may be aligned either parallel or perpendicular to a unidirectional current. Flume experiments on…Read more on Orientation studies of waterlogged wood: A paleocurrent indicator?
An interhemispheric comparison of the concentrations of bromine compounds in the atmosphere
1 January, 1985
At least seven organic bromine compounds have been positively identified in the atmosphere1,2 (CH3Br, CH2Br2, CHBr3, CH2BrCl, CF3Br, CF2BrCl and C2H4Br2) and others have been observed in coastal seawater samples…Observations of a day-time mid-latitude ionospheric trough
1 January, 1985 by Michael Pinnock
A summer, dayside, mid-latitude trough detected by a digital ionosonde located at Halley (76°S, 27°W, L = 4.2) is described. The trough is found to be present in the F2-region…Read more on Observations of a day-time mid-latitude ionospheric trough
Interaction between ice shelf and ocean in George VI Sound, Antarctica
1 January, 1985
George VI Ice Shelf floats on warmer water than any other ice shelf in the Antarctic. Profiles of temperature (T) and salinity (S) taken in the vicinity of the northern…Read more on Interaction between ice shelf and ocean in George VI Sound, Antarctica
Dielectric behaviour of firn and ice from the Antarctic Peninsula, Antarctica
1 January, 1985
Dielectric experiments have been undertaken at temperatures between −2° and −70° C in the frequency range 10Hz to 100 kHz on 14 firn and ice samples retrieved from the Antarctic…Read more on Dielectric behaviour of firn and ice from the Antarctic Peninsula, Antarctica