Found 14089 items
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…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
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
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…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
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…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
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
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…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…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
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…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).…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
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…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…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?
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…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
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
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
1 January, 1985
The paper discusses how profiles of electron and/or ion distributions that are produced by two different computer models can be smoothly coupled together. The first of these models is the…Read more on Modelling the plasmasphere for the international reference ionosphere
1 January, 1985
Brood reduction is common in a population of Blue‐eyed Shags on Signy Island, South Orkney Islands. This paper describes possible adaptations which may reduce the brood. In clutches of three,…Read more on Brood reduction in the Blue-eyed Shag Phalacrocorax atriceps
1 January, 1985
The realistic model of Quegan et al. has been used to investigate the convection paths of ionospheric plasma at 300 km altitude, for different polar cap radii and in both…Read more on Modelling studies of ionospheric convection in northern and southern polar regions
1 January, 1985
A new and well-preserved.asteroid, Protremaster uniserialis (gen. & sp.nov.) is described from the Lower Jurassic (Sinemurian) of Antarctica. This find extends the fossil record of the family Asterinidae and the…Read more on Protremaster, a new Lower Jurassic genus of asteroid from Antarctica
1 January, 1985
Parametric and nonparametric analyses were used to investigate the relationships between the populations of viable microbes and 4 edaphic variables — soil moisture, rainfall, temperature, and pH. Microbial populations were…1 January, 1985
Smith (1982) reported the discovery in 1981 of Antarctic hair grass Deschampsia antarctica Desv. on the largest of the Refuge Islands (68° 21' S) in Marguerite Bay, off the south-west…Read more on New southernmost record for Antarctic flowering plants
1 January, 1985
Beauchêne Island is the most isolated of the Falkland Islands archipelago and until the authors' visit there in 1980 little was known or published about the island and its biota…1 January, 1985
The 35 × 20 km Cerro Galán resurgent caldera is the largest post-Miocene caldera so far identified in the Andes. The Cerro Galán complex developed on a late pre-Cambrian to…Read more on Ignimbrites of the Cerro Galan caldera, NW Argentina
1 January, 1985
The installation of a Fabry–Perot interferometer at Halley (75.5° S, 26.8° W; L = 4.2), Antarctica, has now allowed the first comparison to be made between Southern Hemisphere ground-based thermospheric…1 January, 1985
A subduction-accretion model incorporating new geophysical data is presented to explain the geology of the Antarctic Peninsula from late Palaeozoic to Cenozoic time. According to the model, the peninsula consists…Read more on Crustal growth of the Antarctic Peninsula by accretion, magmatism and extension
1 January, 1985
Whole‐rock and mineral analyses of polydeformed mica‐schist, quartzite, marble and amphibolite are presented from Signy Island, South Orkney Islands, part of the Scotia metamorphic complex. Whole‐rock chemistry suggests that the…