Now showing items 1-10 of 110
Survey site selection for data-deficient arthropod taxa: From R.A.G.S. to richness
Conservation of any taxon requires sound information on its distribution and abundance. Modern area selection techniques are critically dependent especially on distribution data, yet for poorly surveyed taxa, such as ...
Reactive oxygen species production and discontinuous gas exchange in insects
While biochemical mechanisms are typically used by animals to reduce oxidative damage, insects are suspected to employ a higher organizational level, discontinuous gas exchange mechanism to do so. Using a combination of ...
Litter decomposition in fynbos vegetation, South Africa
The Western Cape of South Africa is characterized by the hyperdiverse vegetation of the Fynbos biome. Typical fynbos vegetation is a fire-adapted sclerophyllous Mediterranean-type ecosystem on poor, sandy or stony soils. ...
Diversity and conservation of invertebrates on the sub-Antarctic Prince Edward Islands
The Prince Edward Islands form a unique component of South Africa's natural estate. Here we present an overview of the diversity of the invertebrate fauna found on Marion and Prince Edward Islands and the conservation ...
Using scale-area curves to quantify the distribution, abundance and range expansion potential of an invasive species
Aim Invasive species distribution and abundance data are essential for management decisions on mitigating impacts but is seldom available. Here, we use scale-area curves to assess the distribution, abundance and consequent ...
Respiratory dynamics of discontinuous gas exchange in the tracheal system of the desert locust, Schistocerca gregaria
Gas exchange dynamics in insects is of fundamental importance to understanding evolved variation in breathing patterns, such as discontinuous gas exchange cycles (DGCs). Most insects do not rely solely on diffusion for the ...
Challenges to the future conservation of the antarctic
Changing environments and resource demands present challenges to Antarctic conservation.
Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation
Much of the work on the responses of terrestrial arthropods to high and low temperatures has been done on model organisms such as Drosophila. However, considerable variation in thermotolerance is partitioned at the family ...
The effects of acclimation and rates of temperature change on critical thermal limits in Tenebrio molitor (Tenebrionidae) and Cyrtobagous salviniae (Curculionidae)
Critical thermal limits provide an indication of the range of temperatures across which organisms may survive, and the extent of the lability of these limits offers insights into the likely impacts of changing thermal ...
Biological survey of the Prince Edward Islands, December 2008
A biological survey of the Prince Edward Islands took place In December 2008. The survey repeated an earlier survey of the populations of surface-nesting seabirds on both islands and of fur seals (Arctocephalus spp.) and ...