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Haul-by-haul logbook catch and effort data from the Japanese krill fishery for the 1980/81 to 2003/04 fishing seasons were analysed. For a number of definitions of effort … and catch-per-unit-effort (CPUE)…
The current shape and rate of change of the margins of the Antarctic ice sheet are … poorly known. Since polar regions are inhospitable, remotely sensed images … provide an invaluable data source for studying the ice margin.
[1] We analyzed d29Si of dissolved silicate for eight water column profiles across the … Southern Ocean (south of Australia in spring 2001) from the Seasonal Ice Zone (SIZ) north to the Subantarctic Zone (SAZ), including the first isotopic compositions measured … for Si-depleted seawaters.
Growth trends of Antarctic krill with sex, length, season, and region as independent variables … were modelled with a linear mixed model (LMM) using … 10 yr of accumulated instantaneous growth rate (IGR) measurements. A model of inter-moult period (IMP) as … a function of temperature…
Von Bertalanffy (VB) growth models for … Antarctic krill have been calibrated from populationlevel … data consisting of modal lengths obtained from … a time sequence of length frequency samples. We … developed an alternative approach to predicting the … trajectory of length over time…
Antarctic macroalgae survive extended periods of darkness followed by rapid and extreme increases in irradiance when sea-ice … breaks out in summer. Algae from dark, ice-covered locations had low values of saturating irradiance (Ek: 4–19 mmol photons … m2 s1)…
Ice-core records are a key resource for reconstructing Antarctic climate. However, a … number of physical processes preclude the simple interpretation of ice-core properties such as oxygen … isotopic ratios in terms of climate variables like temperature or sea-level pressure. We show that welldated…
Long-term studies at Bird Island, South … Georgia, show that numbers of wandering, black-browed … and grey-headed albatrosses have been decreasing … since the late 1970s. To determine the status of the total … South Georgia population…
Industrial longline fisheries are considered worldwide as the main threat to albatross and … petrel populations, particularly at open oceans. However, inside countries’ EEZ artisanal … fleets account for a significant fishing effort and eventually…
Two superficially similar species, Eusirus perdentatus Chevreux, 1912, and E. propeperdentatus Andres, 1979, have overlapping geographic distributions around Antarctica. Here, revisions are suggested for both species to clarify their status and distribution and to facilitate identifications…
A regional chemical boundary termed the ‘salt line ’,in the Vestfold Hills of East Antarctica, was investigated using X-ray diffraction and electron probe analyses of surficial salts, and conductivity of surficial sediments. West of the salt line, halite and thenardite are abundant.
In order to assess seasonal and spatial changes in diet, the ä15N and ä13C signatures of … vibrissae from leopard seals Hydrurga leptonyx obtained from Prydz Bay, Eastern Antarctica, were … compared with those of a captive seal on a known diet. Using the isotopic signatures of known prey…
(DMSP) in a variety of sea ice and seawater habitats in the Antarctic Sea Ice Zone (ASIZ) during spring and summer. Sixty-two sea ice cores of pack and fast ice were collected from twenty-seven sites across an area of the eastern ASIZ (648E to 1108E; and the Antarctic coastline north to 628S).
The dynamics of animal populations are determined by several key demographic parameters, which vary over time with resultant changes in the status of the population. When managing … declining populations, the identification of the parameters that drive such change are a high priority…
We report on the first Southern Hemisphere comparison between polar mesosphere summer echoes (PMSE) and cosmic noise absorption (CNA). Observations were obtained during the austral summer of 2003–2004 from a 55 MHz MST radar, a 38.
The calving activity of the Antarctic ice shelves is one of the major indicators of global climate change. Whereas massive calving events are well observed post factum from satellites, ice rifting and ice shelf breaks of smaller volumes are not monitored and statistically analysed.
The southern annular mode is the leading mode of Southern Hemisphere circulation variability, the … temporal evolution of which is characterized by large amplitudes and significant persistence.
Using a recent 22-yr (1979–2000) record of the NCEP–Department of Energy (DOE) reanalysis 2 dataset … (hereafter, NCEP2 reanalysis) and a two-level spherical quasi-geostrophic, quasi-linear model, the eddy–zonalmean … flow interactions associated with the Southern Hemisphere annular mode (SAM)…
Minimum approach distance guidelines are common tools to maintain a buffer between breeding seabirds and human activity, with the goal of mitigating potentially harmful impacts from these interactions.