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1. Subordinate helpers in cooperative societies may gain both immediate and future benefits, including paternity and territorial inheritance. However, if such opportunities correlate with rank … in the queue, it is unclear why such queues should be stable. 2.
The eVect of diVerent light regimes on the … development of sexual maturity and body composition … (carbon, nitrogen, lipid and protein) of Antarctic krill, Euphausia … superba, was studied over 12 weeks under laboratory … conditions.
Law Dome is situated in East Antarctica, and is a relatively high elevation … coastal site, with an ice core record spanning approximately 80,000 years. It … receives high snow accumulation and is situated on the most northerly … coastline in Antarctica (apart from the tip of the Peninsula)…
Fast ice makes up about 10 % by area (or 14 - 20 % by volume) of the total … Antarctic pack. Its growth is largely determined by thermodynamics processes, which makes it a valuable tool to monitor changes in the polar climate system. Time series of fast-ice properties…
The event that occurred approximately 8200 years ago is the largest excursion in climate since the beginning of the Holocene. In this event we observe the climatic response to a perturbation which provides a probe with which to investigate the stability of interglacial climate.
Quantifying the contribution of solar variability to past and present climate change has been an important and controversial aspect of climate research. 10Be records from polar ice have played a key role in extending solar activity reconstructions beyond the period of direct observations of the sun.
We have developed a method for determining ICME (Interplanetary coronal mass ejection) geometry from galactic cosmic ray data recorded by the ground-based muon detector network. The … cosmic ray density depression inside the ICME, which is the cause of a Forbush decrease…
The size-differentiated sex ratio (proportion of males, PM) of Antarctic krill Euphausia … superba was examined with an extensive dataset derived from scientific surveys in the Indian Ocean … sector and the southwest Atlantic sector, and from the krill fishery in the Southern Ocean.
Blue-dyed bait is a seabird bycatch mitigation technique which is assumed to reduce the … contrast between the bait and the ocean background making baits visually cryptic to seabirds. We tested this assumption in two ways. First, using measured spectral profiles of blue-dyed … baits (fish and squid)…
Many modern spatially explicit ecosystem models use modelling subdomains of different … shape and size (‘polygons’) to resolve space, and movement of biomass between them forms … an important part of the modelling effort. In marine applications…
FPGA is a potential medium for DSP implementation of direct conversion transmitters and receivers. However analog interface cannot be ruled out since amplification and other tasks are still in the analog domain. In a previous work…
Quantization is a representation of data samples with a certain number of bits per sample after rounding to a suitable … level of precision. Quantization errors in a Digital Signal Processing (DSP) system can be introduced from three … sources; one source is input quantization…
This overview describes an international scientific cooperation between Brazil, USA and Japan, for an … integrated research program developed in south of Brazil for observations of solar-terrestrial interactions … and geospace.
At 08:35 UT on 21 November 2004, the onset of … an interval of substorm activity was captured in the southern … hemisphere by the Far UltraViolet (FUV) instrument on … board the IMAGE spacecraft. This was accompanied by … the onset of Pi2 activity and subsequent magnetic bays…
Abstract The diet of pinnipeds is most commonly … inferred from morphologically diagnostic remains of prey … in their scats. Although this method can generate quantitative … estimates of diet simply, important prey types may not … always be detected.
Pelagic longline and trawl fisheries are known to kill large numbers of albatrosses worldwide. However, the impact on individual species and populations has rarely been assessed, often … because many albatross species are difficult to identify. Shy albatrosses (Thalassarche … cauta)…
1] This study examines the accuracy of the model 501A UV biometer in taking … measurements relative to a predetermined background condition. The UVSPEC model … with the discrete ordinates radiative transfer (DISORT)…
Fan-Beam and Pencil-Beam Radar Scaterrometers on many satellites in polar orbits, e.g. ERS-1/2, ADEOS-1/2 and QuikSCAT, have been designed primarily for estimation of vector winds over the … global oceans. However, these scatterometers…
The Cryosphere and Climate Project (CliC) c~-ordinates climate activities related to all … parts of the earth's cryosphere. This includes sea ice, snow, ice shelves, ice bergs, lake ice, and permafrost. This talk will give a brief overview of the CliC project…