10717 to 10728 of 14026 results
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Cretaceous (Late Albian) coniferales of Alexander Island, Antarctica. 2. Leaves, reproductive structures and roots
Read more of: Cretaceous (Late Albian) coniferales of Alexander Island, Antarctica. 2. Leaves, reproductive structures and rootsConiferous foliage from the Albian of AlexanderIsland, Antarctica, is assigned to the Araucariaceae, Podocarpaceae, and Taxodiaceae based on attached or associated fertile remains. Araucarian foliage represented by Araucaria alexandrensis sp. […]
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Early Oligocene Nothofagus from CRP-3, Antarctica: implications for the vegetation history
Read more of: Early Oligocene Nothofagus from CRP-3, Antarctica: implications for the vegetation historyA single fossil leaf of Nothofagus from CRP-3 drillhole in the Victoria Land Basin provides further evidence for woody vegetation in the Tertiary of East Antarctica. The plicate vernation of […]
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Recent aqueous environments in Martian impact craters: an astrobiological perspective
Read more of: Recent aqueous environments in Martian impact craters: an astrobiological perspectiveThe discovery of gullies and debris aprons raises the question of the existence of aqueousenvironments on Mars in recent geological times and its astrobiological implications. Three cases of such environments […]
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Global relationships amongst black-browed and grey-headed albatrosses: analysis of population structure using mitochondrial DNA and microsatellites
Read more of: Global relationships amongst black-browed and grey-headed albatrosses: analysis of population structure using mitochondrial DNA and microsatellitesThe population structure of black-browed (Thalassarche melanophris and T. impavida) and grey-headed (T. chrysostoma) albatrosses was examined using both mitochondrial DNA (mtDNA) and microsatellite analyses. mtDNA sequences from 73 black-browed […]
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Enhanced magma supply at the southern East Scotia Ridge: evidence for mantle flow around the subducting slab?
Read more of: Enhanced magma supply at the southern East Scotia Ridge: evidence for mantle flow around the subducting slab?Bathymetric and seismic data show that the southernmost segment of the EastScotia Ridge (segment E9) is anomalous in its curved plan form, and in the presence of a large axial […]
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Seasonality of feeding and nutritional status during the austral winter in the Antarctic sea urchin Sterechinus neumayeri
Read more of: Seasonality of feeding and nutritional status during the austral winter in the Antarctic sea urchin Sterechinus neumayeriThe seasonal pattern of food intake and tissue energy status was measured over a 2 year period for two populations of the common Antarctic echinoid Sterechinus neumayeri living on contrasting […]
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Seasonality of respiration and ammonium excretion in the Antarctic echinoid Sterechinus neumayeri
Read more of: Seasonality of respiration and ammonium excretion in the Antarctic echinoid Sterechinus neumayeriOxygen consumption (MO2) and ammonium excretion rates were recorded monthly over 2 yr for the regular Antarctic echinoid Sterechinus neumayeri to investigate metabolic activity in relation to seasonal food limitation […]
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The relative influence of temperature and food on the metabolism of a marine invertebrate
Read more of: The relative influence of temperature and food on the metabolism of a marine invertebrateMany benthic marine invertebrates exhibit a seasonal cycle in activities such as feeding, growth and reproduction. In temperate regions, this seasonality is typically correlated with coincident cycles in photoperiod, temperature […]
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The seasonal energetics of the Antarctic bivalve Laternula elliptica (King and Broderip) at Rothera Point, Adelaide Island
Read more of: The seasonal energetics of the Antarctic bivalve Laternula elliptica (King and Broderip) at Rothera Point, Adelaide IslandSeasonal changes in feeding activity, metabolic rate and major tissue energy concentrations of the infaunal bivalve Laternula elliptica were monitored over a 12 degrees month period in relation to phytoplankton […]