Passive dispersal in arachnids

摘要: Some arachnids (spiders, mites and pseudoscorpions) are able to use both active passive dispersal. The best-known dispersal method in is called eballooningi starts with etiptoe behaviouri. Using threads of silk, spiders can move from place air currents. Usually the spider aeronauts small, but sometimes larger ones also be transported this way. spread passively by using or their own body as a carrying surface. A great number mite species intentionally other animals (e.g. insects) carriers, phenomenon known phoresy. Similarly, pseudoscorpions infest insects. most probable reasons that may cause are: overpopulation, changeable physical conditions, ecocatastrophe. Passive one major ways colonization new areas habitats, which extends geographical ranges species. oldest traces come Tertiary period, it thought have existed late Mesozoic. From an evolutionary point view, interesting phoront-host relationship, result co-evolution Rhinoseius hummingbirds).