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Stridulation is the act of producing sound by rubbing together certain body parts. This behavior is mostly associated with insects, but other animals are known to do this as well, such as a number of species of fish, snakes and spiders. The mechanism is typically that of one structure with a well-defined lip, ridge, or nodules (the "scraper" or plectrum) being moved across a finely-ridged surface (the "file" or stridulitrum—sometimes called the ''pars stridens'') or vice versa, and vibrating as it does so, like the dragging of a phonograph needle across a vinyl record. Sometimes it is the structure bearing the file which resonates to produce the sound, but in other cases it is the structure bearing the scraper, with both variants possible in related groups. Common onomatopoeic words for the sounds produced by stridulation include chirp and chirrup. ==Arthropod stridulation== Insects and other arthropods stridulate by rubbing together two parts of the body. These are referred to generically as the stridulatory organs. The mechanism is best known in crickets, mole crickets, and grasshoppers, but other insects which stridulate include Curculionidae (weevils and bark beetles), Cerambycidae (longhorned beetles), Mutillidae ("velvet ants"), Reduviidae (assassin bugs), Buprestidae (metallic wood-boring beetles), Hydrophilidae (water scavenger beetles), Cicindelinae (tiger beetles), Scarabaeidae (scarab beetles), Glaresidae ("enigmatic scarabs"), larval Lucanidae (stag beetles),〔(Stridulation in stag beetle larvae (Lucanus cervus L.) ) by Dr. Eva Sprecher-Uebersax, January 2002〕 Passalidae (Bessbugs), Geotrupidae (earth-boring dung beetles), Alydidae (broad-headed bugs), Miridae (leaf bugs), Corixidae, notably Micronecta scholtzi, various ants (including the Black imported fire ant, ''Solenopsis richteri''),〔(Stridulation Sounds of Black Fire Ants (Solenopsis richteri) in Different Situations )〕 and some species of Agromyzidae (leaf-mining flies). Stridulation is also known in a few tarantulas (Arachnida) and some pill millipedes (Diplopoda, Oniscomorpha). The anatomical parts used to produce sound are quite varied: the most common system is that seen in grasshoppers and many other insects, where a hind leg scraper is rubbed against the adjacent forewing (in beetles and true bugs the forewings are hardened); in crickets and katydids a file on one wing is rubbed by a scraper on the other wing; in longhorned beetles, the back edge of the pronotum scrapes against a file on the mesonotum; in various other beetles, the sound is produced by moving the head—up/down or side-to-side—while in others the abdominal tergites are rubbed against the elytra; in assassin bugs, the tip of the mouthparts scrapes along a ridged groove in the prosternum; in velvet ants the back edge of one abdominal tergite scrapes a file on the dorsal surface of the following tergite. Most spiders are silent, but some tarantula species are known to stridulate. When disturbed, ''Theraphosa blondi'', the Goliath tarantula, can produce a rather loud hissing noise by rubbing together the bristles on its legs. This is said to be audible to a distance of up to 15 feet (4.5 m).〔(Goliath Tarantula, ''Theraphosa blondi'' ) at (Extreme Science ). Accessed 13 March 2007.〕 One of the wolf spiders, ''Schizocosa stridulans'' Stratton, produces low-frequency sounds by flexing its abdomen (tremulation, rather than stridulation) or high-frequency stridulation by using the cymbia on the ends of its pedipalps. Stridulation in several of these examples is for attracting a mate, or as a form of territorial behaviour, but can also be a warning signal (acoustic aposematism, as in velvet ants and tarantulas). This kind of communication was first described by Slovenian biologist Ivan Regen (1868–1947). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Stridulation」の詳細全文を読む スポンサード リンク
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