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The application of blue-dye to fishing baits is a seabird bycatch mitigation technique used … in some pelagic longline fisheries that is thought to make the baits less visible and hence … less attractive to seabirds. We tested this assumption in two ways. First…
Airgun ‘shots’ from seismic surveys are powerful enough to be heard across ocean basins. At … close range, though, there is extraordinarily little understanding of the potential for these intense … sounds to cause temporary or permanent hearing threshold shifts (TTS/PTS) in marine … mammals.
Modelled 10Be production by solar cosmic ray (SCR) events is compared with measured 10Be concentrations … in a Law Dome snow pit record. The snow pit record spans 2.7 years, providing a quasi-monthly 10Be … sampling resolution which overlaps with the SCR events of 29 Oct 2003 and 20 Jan 2005.
The dual HF radars comprising the Tasman International … Geophysical Environment Radar (TIGER) system … often observe localized high-velocity F-region plasma flows … (1500 m/s) in the midnight sector (20:00–02:00 MLT) at … magnetic latitudes as low as 3=60 S.
A conceptual, lithospheric-scale cross-section of the conjugate, oblique-slip margins of George V Land, East … Antarctica, and southeast Australia (Otway Basin) has been constructed based on the integration of seismic and sample … data.
We present for the first time hourly variations of the spatial density gradient of 50 GeV cosmic rays within a sample … solar rotation period in 2006. By inversely solving the diffusive flux equation, including the drift…
Planetary waves with periods between two and four days in the middle atmosphere over … Antarctica are characterized using one year of data from the medium-frequency spaced … antenna (MFSA) radars at Scott Base, Rothera, and Davis. In order to investigate the origin … of the observed waves…
A barotropic tidal model has been applied to the Amery Ice Shelf cavity and Prydz … Bay region of East Antarctica. The sensitivity of the tidal solution of the model to … variation of the water column thickness of the Amery Ice Shelf cavity has been … determined.
Antarctic terrestrial ecosystems are noted for their relative simplicity and limited trophic structure. In this context, knowledge of biotic … interactions in structuring terrestrial soil communities would seem beneficial from a theoretical perspective as well as from a conservation … perspective.
We carried out a comparative study using mtDNA (COI) for two free-living, endemic, terrestrial invertebrate taxa—the springtail Gomphiocephalus hodgsoni (Hypogastruridae) and the mite Stereotydeus mollis (Penthalodidae) collected from sites throughout Victoria Land and the Queen Maud Mountains…
Human-induced changes to natural systems can cause major disturbances to fundamental … ecological and population processes and result in local extinctions and secondary contacts … between formerly isolated species. Extensive fur seal harvesting during the nineteenth … century on Macquarie Island…
A series of nutrient-amended microcosms was used to investigate changing microbial communities during biodegradation in … hydrocarbon-contaminated Antarctic soils at 4, 10 and 42 °C. Although sample heterogeneity resulted in no statistically significant … reduction in total petroleum hydrocarbons…
We sequenced the mitochondrial (mt) DNA cytochrome c oxidase subunit I gene to examine comparative phylogeographic patterns … for the springtail Gomphiocephalus hodgsoni and the mite Stereotydeus mollis throughout their ranges in southern Victoria Land, Antarctica.
Abstract. An eddying global model is used to study the characteristics … of the Antarctic Circumpolar Current (ACC) in a … streamline-following framework. Previous model-based estimates … of the meridional circulation were calculated using … zonal averages:
We reexamine the relationship between circulation, bathymetry, and surface … chlorophyll in the Southern Ocean, using new high-resolution maps of the frontal structure … of the Antarctic Circumpolar Current (ACC) derived from satellite altimetry.
Repeat hydrographic sections occupied in 1995 and … 2005 reveal a rapid decline in the salinity and density of … Antarctic Bottom Water throughout the Australian Antarctic … Basin. The basin-wide shift of the deep potential … temperature-salinity (qS)…
The spatial and temporal characteristics of cyclonic eddies in the Antarctic … Divergence off Ade´lie Coast are described using repeated in situ observations between … 2001 and 2003, satellite observations, and results of a high-resolution ocean general … circulation model.
Repeat summer hydrographic observations along … 140E are used to document significant changes in the … properties of the Ade´lie Land Bottom Water (ALBW) between the mid-1990s and 2002–2003. Water on the 28.35 … kgm3 neutral density surface cooled by 0.2C and … freshened by 0.
A hot water drill was used to penetrate 480 m of ice to reveal a diverse benthic assemblage, dominated by … suspension-feeding invertebrates, under the Amery Ice Shelf (East Antarctica) at a location 100 km from open … water and at a depth of 775 m below sea level (840 m below the ice shelf surface)…
An extensive Pb isotope ratio survey of ∼100 marine sediment samples from near Casey … Station, East Antarctica has been undertaken. Sediment surface grabs and cores were … collected over nine years between 1997–2006 and, following HF total digestion, were … analysed by magnetic sector ICP-MS.
1. Correlational studies of reproductive success are plagued by difficulty over the direction of … causation. For example, improved reproductive success with age can result from increased … experience or reproductive effort, or selection against low-quality phenotypes that survive poorly.
ABSTRACT: Collisions with vessels are a well-documented conservation problem for some populations of large whales (LW) in the Northern Hemisphere. Less attention has been given to incidents in the Southern Hemisphere or to small cetaceans … (SC) worldwide…
Length-at-age data for Patagonian toothfi sh (Dissostichus eleginoides) at Heard Island … (Division 58.5.2) were fi tted using a von Bertalanffy (VB) growth model taking into … account response-biased sampling of fi sh that were aged. Subsampling of random lengthfrequency … (LF)…