The term glomerulonephritis (GN) covers a group of conditions in which there is injury in the glomerulus, the filtering unit of the kidney. This can occur either as a primary glomerular disease, or secondary to drugs, infections or tumours (see Secondary Glomerular Disease, pp 464â466 of this issue).
As insects are spiders' main prey, it is likely that they would impose strong selectional forces on the foraging behavior of spiders. Most commonly found in the sheet-web spider families, some webs will have loose, irregular tangles of silk above them.
What do arachnids eat? Arachnids are mostly carnivorous predators and usually feed on smaller arthropods, with the exception of daddy longlegs and some mites that feed on plant matter. Ticks and mites tend to be parasitic, feeding on fluids from living animals, plant material or decaying organic matter.