6901 to 6912 of 14084 results
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Foraging economics and performance of polar and subpolar Atlantic seabirds
Read more of: Foraging economics and performance of polar and subpolar Atlantic seabirdsSeabirds of high latitudes in the North and South Atlantic (chiefly penguins, Procellariformes, alcids, shags, Gannet and Kittiwake) are compared (on absolute and energy-, mass- and time-specific scaled bases) in […]
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Southern Ocean environmental changes: effects on seabird, seal and whale populations
Read more of: Southern Ocean environmental changes: effects on seabird, seal and whale populationsThe main changes in the distribution and abundance of marine top predators in the Antarctic in the last two centuries were caused by hum an over-exploitation. Hypotheses that increases in […]
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The extent of hydrocarbon contamination in the marine environment from a research station in the Antarctic
Read more of: The extent of hydrocarbon contamination in the marine environment from a research station in the AntarcticLow level hydrocarbon contamination is measurable in the vicinity of Antarctic stations, N-alkane and polycyclic aromatic hydrocarbon (PAH) concentrations in seawater and sediment at Signy Station, South Orkney Islands indicated […]
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Natural and anthropogenic hydrocarbons in the Antarctic marine environment
Read more of: Natural and anthropogenic hydrocarbons in the Antarctic marine environmentThe Antarctic marine environment contains a range of hydrocarbons at low concentrations, which are generally biogenic in origin. All major classes of hydrocarbons have been found in the Antarctic ecosystem. […]
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Late Cretaceous palaeoenvironments and biotas: an Antarctic perspective
Read more of: Late Cretaceous palaeoenvironments and biotas: an Antarctic perspectiveThe Cretaceous period is often regarded as one of “greenhouse” warmth, with perhaps its acme occurring in the late Albian stage (100 Ma ago). However, it is now apparent that, […]
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Evolutionary history of the polar regions
Read more of: Evolutionary history of the polar regionsWith the recent rapid increase in our knowledge of the palaeontological history of both polar regions it has become apparent that they should now be regarded as something more than […]
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Excitation and decay of flows in the magnetosphere-ionosphere system due to magnetic reconnection at the dayside magnetopause and in the geomagnetic tail
Read more of: Excitation and decay of flows in the magnetosphere-ionosphere system due to magnetic reconnection at the dayside magnetopause and in the geomagnetic tail -
The propagation of mixed polarization VLF (f≤5 kHz) radio waves in the Antarctic Earth-ionosphere waveguide
Read more of: The propagation of mixed polarization VLF (f≤5 kHz) radio waves in the Antarctic Earth-ionosphere waveguideDuring 1986, a series of special VLF transmissions at ∼3 kHz and ∼5 kHz were made from the crossed dipole antenna at Siple Station, Antarctica, which simulated transmissions from a […]
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Aspects of the biology of the midge, Eretmoptera murphyi Schaeffer (Diptera: Chironomidae), introduced to Signy Island, maritime Antarctic
Read more of: Aspects of the biology of the midge, Eretmoptera murphyi Schaeffer (Diptera: Chironomidae), introduced to Signy Island, maritime AntarcticThe biology of a population of the subantarctic chironomid midge Eretmoptera murphyi Schaeffer, introduced to Signy Island in the maritime Antarctic more than 20 years ago, is described. Investment in […]
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Seasonal lipid contents of Antarctic microarthropods
Read more of: Seasonal lipid contents of Antarctic microarthropodsA technique for the accurate determination of lipid content of very small quantities of biological tissue was applied to two Antarctic oribatid mites,Alaskozetes antarcticus andHalozetes belgicae, and a collembolan,Cryptopygus antarcticus. […]