02309nas a2200217   4500008004100000022001400041245008500055210006900140260001600209300001400225490000800239520163900247653003501886653002101921653001401942653002301956653002401979100001802003700001902021856005102040       1999                        eng d  a0952-836900aAcoustic signals in cicada courtship behaviour (order Hemiptera, genus Tibicina)0 aAcoustic signals in cicada courtship behaviour order Hemiptera g  cJan-01-1999  a217 - 2240 v2623 a<p>During pair formation, cicadas produce acoustic signals that allow sexual partners to meet. The male is generally the emitter, producing calling songs at long range and courtship songs at short range, and the female generally the receiver. The male&ndash;female courtship behaviour of seven taxa belonging to the Palaearctic genus Tibicina is described here for the first time. Male courtship songs consisted of a succession of groups of pulses arranged in two sub‐groups. They were short in duration with strong amplitude variations. In all taxa, courtship songs were preceded by a series of 1&ndash;5 audible wing‐flicks. Differences in courtship song structure between two pairs of sympatric species, respectively T. corsica corsica/T. nigronervosa and T. corsica fairmairei/T. tomentosa, suggest that courtship signals could act as distinctive species mating recognition systems. In response to male acoustic signalling, females of T. c. corsica, T. c. fairmairei and T. nigronervosa produced audible wing‐flicks such that both sexes established an acoustic duet ending in physical contact. In addition, males and females of T. tomentosa produced silent wing‐flicks, a previously unknown behaviour, which could facilitate pheromone diffusion. Females did not exhibit a species‐specific temporal pattern in acoustic reply to male courtship song and female wing‐flick behaviour does not seem necessary for pair formation. Nevertheless, this strategy through male and female signalling ensured a reciprocal phonotactic approach that probably enhanced the likelihood for the two sexes to meet in complex habitats.</p>
10aaudible and silent wing-flicks10acicadas Tibicina10acourtship10amale–female duet10asound communication1 aSueur, Jerome1 aAubin, Thierry  uhttp://doi.wiley.com/10.1017/S095283690300468002020nas a2200229   4500008004100000022001400041245007800055210006900133260001600202300001400218490000700232520133100239653002701570653001401597653001401611653002601625653002601651653002101677100001801698700001901716856005501735       2006                        eng d  a0028-104200aWhen males whistle at females: complex FM acoustic signals in cockroaches0 aWhen males whistle at females complex FM acoustic signals in coc  cJan-10-2006  a500 - 5050 v933 a<p>Male cockroaches of the species Elliptorhina chopardi expel air through a pair of modified abdominal spiracles during courtship. This air expulsion simultaneously produces air and substrate-borne vibrations. We described and compared in details these two types of vibrations. Our analysis of the air-borne signals shows that males can produce three categories of signals with distinct temporal and frequency parameters. &ldquo;Pure whistles&rdquo; consist of two independent harmonic series fast frequency modulated with independent harmonics that can cross each other. &ldquo;Noisy whistles&rdquo; also possess two independent voices but include a noisy broad-band frequency part in the middle. Hiss sounds are more noise-like, being made of a broad-band frequency spectrum. All three call types are unusually high in dominant frequency (&gt;5 kHz) for cockroaches. The substrate-borne signals are categorised similarly. Some harmonics of the substrate-borne signals were filtered out, however, making the acoustic energy centered on fewer frequency bands. Our analysis shows that cockroach signals are complex, with fast frequency modulations and two distinct voices. These results also readdress the question of what system could potentially receive and decode the information contained within such complex sounds.</p>
10aacoustic communication10aCockroach10acourtship10aElliptorhina chopardi10afrequency modulations10atwo-voice system1 aSueur, Jerome1 aAubin, Thierry  uhttp://link.springer.com/10.1007/s00114-006-0135-9