29 KB706 KB22 KB199320242010Gogala, MatijaTrilar, Tomištevilka:1letnik:18str. 5-18ISSN:1318-1998COBISSID:850933URN:URN:NBN:SI:doc-XWW6F2AJenPrirodoslovni muzej SlovenijeSlovensko entomološko društvo Štefana MichielijaActa entomologica slovenica (Ljubljana)CreteentomologijafavnaKretaškržadiTettigetta carayoni Boulard (Hemiptera: Cicadidae) from Crete, faunistic data and first description of its song| Tettigetta carayoni Boulard (Hemiptera: Cicadidae) s Krete, favnistični podatki in opis pozivnega napeva|Using recording equipment for sonic and ultrasonic range we recorded the calling song of Tettigetta carayoni Boulard 1982, which is endemic to the Greek island of Crete (Kriti). It is widely distributed and common species from the seacoast to the mountains up to 1500 m above sea level. Nevertheless,the song of this species has not been described until now. The calling song structure is characteristic and easily distinguishable from the songs of related cicadas. Typical for the calling song is very fast repetitionrate with 7 to 11 echemes per second. It consists of two parts, together forming a complete song with usual duration of many minutes. The monotonous part is a regular repetition of echemes with medium length, while rhythmic part consists of series with 2 to 4 very short echemes followed by one longer echeme. The monotonous part and rhythmic part can exchange either on a regular basis either one part is very long and can be randomly interrupted with a few echemes from opposite part. Studied was also the microstructure of the song, which shows 4-click units and consequently the stepwise distribution of the echeme duration. The song contains frequencies from 6 to 20 kHz with a maximum between 10.8 and 14.7 kHz. This species specific calling song pattern is compared with songs of other European cicadasS pomočjo snemalne opreme za slušno in ultrazvočno območje smo posneli pozivninapev škržada vrste Tettigetta carayoni Boulard 1982, ki je endemičen na grškem otoku Kreta. Vrsta je splošno razširjena in pogosta od morske obale do nadmorske višine 1500 metrov. Kljub temu oglašnje te vrste še ni bilo opisano. Struktura napeva je vrstno značilna in jo po pozivnem napevu zlahka ločimo od napevov sorodnih pojočih škržadov. Značilna za pozivni napev je zelovelika ponavljalna frekvenca s 7 do 11 ehemi v sekundi. Napev, ki je sestavljen iz dveh delov, običajno traja več minut. Monotoni del je enakomernoponavljanje srednje dolgih ehemov, medtem ko je ritmični del sestavljen iz serij z 2 do 4 zelo kratkimi ehemi, ki jim sledi en daljši ehem.Monotoni in ritmični del se bodisi izmenjujeta enakomerno ali pa en del traja zelo dolgo in je le naključno prekinjen z nekaj ehemi iz drugega dela. Mikrostrukturo napeva sestavljajo enote iz 4 klikov in zato je časovna razporeditev dolžin ehemov stopničasta. Frekvenčni obseg napeva je med 6 in 20kHz z maksimumom med 10,8 and 14,7 kHz. Vrstno značilni pozivni napev sva primerjala tudi z drugimi evropskimi pojočimi škržadiTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaPrirodoslovni muzej Slovenije