Stridulation

As stridulation is called a special form of sound production in insects and spiders by rubbing two mutually movable body parts. Often shrill edges are routed via Shrill surfaces to produce sounds. The result is a scratchy, buzzing, hissing or chirping sound. As a shrill edge wing veins or leg edges are usually transformed, as shrill surfaces are surfaces of wings or other surfaces of the body.

Stridulation occurs in many insect groups; best known is the chirping in the long - and short- horned crickets and at various beetles (eg longhorn beetles ).

In spinning, the sounds are usually produced with the pedipalps, both by rubbing the pedipalps to shrill edges and through the drums with the palps or walking legs on the substrate. Some species, such as giant crab spiders, sounds generated by the vibrations of the body to the base. Spider webs, documents and sheets etc. are used as sounding boards. The stridulation is usually used for intraspecific communication, mainly during courtship, the males striduliert with palps in order to announce the females or to attract gravid females, but also for species recognition and deterrence ( interspecies communication). Predators are probably quenched by the frequencies of the robbers be imitated. Larger tarantulas sometimes produce sounds to defend against larger animals, such as humans. Most of the smaller spiders sounds are not audible to humans; so little is known about the stridulation of spiders. It can be assumed that stridulation is common in spinning.

Documents

• Foelix, Rainer F. 1979. Biology of spiders. Georg Thieme Verlag Stuttgart. ISBN 313575801x.

• Communication (biology)
• Arachnologie
• Entomology
• Noise