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Models of variability in Adélie penguin foraging trip durations were constructed and fitted … to data collected at Béchervaise Island over a 12-year period when only natural variation … was known to occur. Variability among trips and penguins was greater in the crèche … stage…
Reliable estimates of diets are vital to monitor impacts of sea lion populations … on their ecosystems and their interactions with fisheries, and to … understand the role of food to animal nutrition and health. Approaches … include using (1) prey remnants in stomach contents, spews and scats; … (2)…
This review concerns crustaceans that associate with sea ice. Particular … emphasis is placed on comparing and contrasting the Arctic and Antarctic … sea ice habitats, and the subsequent influence of these environments on the … life history strategies of the crustacean fauna.
Underwater calling behaviour between breathing … bouts of a single adult male Weddell seal … (Leptonychotes weddellii) was examined with … respect to call type and timing late in the breeding … season at Davis Station, Antarctica.
Two vascular plant species (hair grass Deschampsia antarctica … and herb Acaena magellanica) from sub-Antarctic Heard Island … were sampled on 5 days between December 2003 and February … 2004.
Over the past 50 years the sub-Antarctic has experienced increases in temperature and radiation. Little scientific attention has been paid to the ecophysiological response of vascular plant species growing on these islands and it is unclear what impact climate change may have on these species.
HPLC-pigment measurements, Production vs Irradiance and daily primary production experiments were carried out on the Kerguelen Plateau during the KEOPS cruise in January and February 2005. The respective contribution of three phytoplankton size classes, namely micro- (> twenty micron)…
: P vs E experiments determining photosynthetic parameters and daily primary production were carried out east of Kerguelen Island during the KEOPS cruise in January and February 2005. The Kerguelen Plateau region is naturally enriched with iron, while deeper waters (>1000m) nearby may not be.
The oxygen isotopic record obtained from Globigerina bulloides, Globorotalia inflata, and Neogloboquadrina pachyderma … (s.) was analysed for 5 sediment traps moored in the Southern Ocean and Southwest Pacific. The traps extend from Subtropical … to the Polar Frontal environments…
Procellariiform seabirds (petrels, albatrosses and shearwaters) navigate vast distances … over seemingly featureless ocean habitat by mechanisms that are not well understood. These birds … have large olfactory bulbs, and the use of smell has been implicated in both foraging and homing … behavior.
Research and data collection over several years has allowed us to determine the best alternative energy option for Australian stations. This is to install a small number of large commercially available, minimally modified wind-turbines. They would be variable-speed, 280kW machines without gearboxes…
A common technique for comparing the in situ microbial potential for mineralisation of petroleum hydrocarbons in different environments or under different remediation strategies, is by use of radiolabelled tracer studies.
The depth distributions of eight groups of phytoplankton were determined along eight north-south transects between longitudes 80„aE and 150„aE, from 63„aS to the sea ice edge or beyond.
The distribution and abundance of phytoplankton communities off east Antarctica were surveyed using CHEMTAX analysis of HPLC pigment profiles, supplemented by microscopy. Eight north--south transects … were surveyed between 80°E and 150°E, from approximately 63°S to the sea-ice, during Jan.--Mar.
Elephant seals were immobilized intravenously with a mixture of tiletamine and zolazepam at a rate of 0.5 mg/kg. This provided a satisfactory degree of anaesthesia with no side effects. Induction, duration and recovery times were short which proved advantageous to researchers and animals.
Accurate assessments of the past and future mass budgets of polar ice sheets are essential to resolving contributions to past sea-level rise and projecting responses to climate change respectively. Both tasks require that ice accumulation and ice flow are each accurately described…
The long-term variation of the solar diurnal anisotropy of the galactic cosmic … ray intensity in the sub-TeV region is studied by using data recorded over … 20 years with the deep underground muon detector at Matsushiro in Japan … since 1984.
Anthropogenic noise generated through travel in the Antarctic has the potential to affect the region’s … wildlife. Weddell seals (Leptonychotes weddellii) in particular can be exposed to anthropogenic noise because they … live under, and breed on, the fast ice on which humans travel.
The diatom flora of three lakes in the ice-free … Amery Oasis, East Antarctica, was studied. Two of the … lakes are meltwater reservoirs, Terrasovoje Lake (31 m … depth) and Radok Lake (362 m depth), while Beaver … Lake (>435 m depth) is an epishelf lake.
Recent research indicates extensive basal melting near the deep grounding lines of major … Antarctic outlet glaciers. Further…
Using satellite altimeter measurements of Antarctic surface elevation changes Davis and … others (Science, 2005) reported that the interior of the East Antarctic ice sheet is thickening … slightly, contributing 0.12 mm/a towards lowering global sea-level.
We evaluated the weekly NIC (National Ice Center) ice chart dataset with in situ sea-ice … thickness observations from the ASPeCt (Antarctic Sea Ice Processes and Climate) program … during the 1995 to 2000 time period. Five ship voyages from May/June 1995, August 1995, May/June 1998…
Antarctica remains one of the last bastions of exploratory limnology. Lakes in many regions … remain completely unknown, in part because of their often cryptic nature. Of particular interest … is whether the biological communities present in these isolated lakes consist of recent (postglacial)…
The southern elephant seal (Mirounga leonina) population at Macquarie Island represents … about 10% of the world’s population. The number of adult females breeding at the island has … decreased substantially since the first whole island census was conducted in 1952.
Significant changes in zooplankton composition have occurred in various ocean systems in … recent years. These changes can be quite dramatic, occurring within one or two seasons, as … happened with the regime shift in the North Sea and North Atlantic in the late 1980s.