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Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events

1 January, 2004 by Janet Silk, Richard Phillips

We identified a range of foraging strategies adopted by grey-headed albatrosses Thalassarche chrysostoma rearing chicks at Bird Island, South Georgia, by simultaneously using satellite telemetry, wet/dry activity recorders and stomach…

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An investigation of latitudinal transitions in the SuperDARN Doppler spectral width parameter at different magnetic local times

1 January, 2004 by Gareth Chisham, Mervyn Freeman

Latitudinal transitions from low to high Doppler spectral width in backscatter measured by the Super Dual Auroral Radar Network (SuperDARN) are now routinely used as proxies for the polar cap…

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A statistical comparison of SuperDARN spectral width boundaries and DMSP particle precipitation boundaries in the nightside ionosphere

1 January, 2004 by Gareth Chisham, Mervyn Freeman

The boundary between quasi-dipolar (closed) geomagnetic field lines and those connected to the interplanetary magnetic field (open) is a key diagnostic for the magnetospheric system. This study presents an HF…

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Measuring the dayside reconnection rate during an interval of due northward interplanetary magnetic field

1 January, 2004 by Gareth Chisham, Mervyn Freeman, Michael Pinnock

This study presents, for the first time, detailed spatiotemporal measurements of the reconnection electric field in the Northern Hemisphere ionosphere during an extended interval of northward interplanetary magnetic field. Global…

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Seaflux

1 January, 2004

High-resolution surface fluxes over the global ocean are needed to evaluate coupled atmosphere–ocean models and weather forecasting models, provide surface forcing for ocean models, understand the regional and temporal variations…

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Protective pigmentation in UVB-screened Antarctic lichens studied by Fourier transform Raman spectroscopy: an extremophile bioresponse to radiation stress

1 January, 2004

FT-Raman spectra were obtained for two Antarctic extremophiles, the epilithic lichens Xanthoria elegans and Caloplaca sublobulata from the maritime ecological long-term research site on Leonie Island. Twelve specimens from cloches…

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Protein synthesis, RNA concentrations, nitrogen excretion, and metabolism vary seasonally in the Antarctic holothurian Heterocucumis steineni (Ludwig, 1898)

1 January, 2004 by Andrew Clarke, Lloyd Peck

Seasonal changes in protein and nitrogen metabolism have not previously been reported in any Antarctic suspension-feeding species that ceases feeding for extended periods in winter. To provide comparison with data…

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A new aspidostomatid bryozoan from the Cape Melville Formation (Lower Miocene) of King George Island, West Antarctica

1 January, 2004 by Alistair Crame

Fragments of large, bilamellar aspidostomatid bryozoan colonies occur in Early Miocene glaciomarine sedimentary sequences of the Cape Melville Formation, King George Island, South Shetland Islands, West Antarctica. Investigation of the…

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Habitat moisture availability and the local distribution of the Antarctic Collembola Cryptopygus antarcticus and Friesea grisea

1 January, 2004 by Roger Worland, Peter Convey

Population densities of the Collembola Cryptopygus antarcticus and Friesea grisea were compared in two maritime Antarctic habitats with different moisture availability. C. antarcticus was absent from the drier rock platform…

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Evolución desde el Mioceno del margen pacífico de la Península Antártica frente a la Isla Adelaida: un ejemplo de margen pasivo glacial

1 January, 2004 by Robert Larter

The analysis of the morphology and stratigraphy of the Antarctic Peninsula Pacific margin offshore from Adelaide Island shows 3 main evolutionary intervals, from the Late Miocene to the recent which…

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Miocene changes in bottom current regime recorded in continental rise sediments on the Pacific Margin of the Antarctic Peninsula

1 January, 2004 by Robert Larter

A Fossil Mounded Sedimentary Body (MB) has been identified in the Miocene sedimentary record on the central continental rise west of Adelaide Island, Antarctic Peninsula, using multichannel seismic reflection profiles.…

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Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea

1 January, 2004 by Jonathan Watkins, Philip Trathan

Following an assessment of Antarctic krill (Euphausia superba) in the Scotia Sea, CCAMLR established a precautionary catch limit of 4 million tonnes and further adopted 15 small-scale management units (SSMUs).…

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Biomass of Antarctic krill in the Scotia Sea in January/February 2000 and its use in revising an estimate of precautionary yield

1 January, 2004 by Jonathan Watkins, Philip Trathan

In January and February 2000, a collaborative survey designed to assess the biomass of Antarctic krill across the Scotia Sea was conducted aboard research vessels from Japan, Russia, the UK…

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Environmental factors influencing the pigment composition of in situ benthic microbial communities in east Antarctic lakes

1 January, 2004 by Dominic Hodgson

To compile reference data for palaeolimnological studies using fossil pigments, we examined the extent to which environmental variables, gross morphology and species composition influence the modern pigment content of in…

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