@article {58221, title = {Acoustic signals in cicada courtship behaviour (order Hemiptera, genus Tibicina)}, journal = {Journal of Zoology}, volume = {262}, year = {1999}, month = {Jan-01-1999}, pages = {217 - 224}, abstract = {

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\–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\–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.

}, keywords = {audible and silent wing-flicks, cicadas Tibicina, courtship, male{\textendash}female duet, sound communication}, issn = {0952-8369}, doi = {10.1017/S0952836903004680}, url = {http://doi.wiley.com/10.1017/S0952836903004680}, author = {Sueur, Jerome and Aubin, Thierry} } @article {53411, title = {Context-dependent variation of house finch song syntax}, journal = {Animal Behaviour}, volume = {147}, year = {2019}, month = {Jan-01-2019}, pages = {33 - 42}, abstract = {

We explored the role of social context in the syntactical variation of house finch, Haemorhous mexicanus, songs using both traditional song measures and network analysis. In comparison to solo bouts, the bouts of countersinging males had increased syntax diversity, with higher numbers of simple paths and transition types (but not syllable types) in comparison to solo song, which had high sequence consistency. Both the proportion of introductory syllables and the degree (number of transitions to and from those syllables) increased in countersinging bouts and were an important source of syntactic variability. In contrast, courtship bouts included longer songs and longer syllables than both solo and countersinging bouts, but were similar to solo songs in sequence consistency. The longest courtship songs often included concatenated sequences that formed \‘compound songs\’, or repeating strings of main song syllables, which slightly increased the degree of those syllables. Our results suggest that interactions between males are associated with increased syntactic variability in song delivery while female choice favours signals that maintain species-typical syntax and demonstrate fitness in terms of a male\&$\#$39;s capacity to sing extended songs.

}, keywords = {birdsong, countersinging, courtship, network analysis, sequence consistency, social context, syntax}, issn = {00033472}, doi = {10.1016/j.anbehav.2018.11.001}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0003347218303373https://api.elsevier.com/content/article/PII:S0003347218303373?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0003347218303373?httpAccept=text/plain}, author = {Ciaburri, Ivy and Williams, Heather} } @article {52605, title = {Complex coevolution of wing, tail, and vocal sounds of courting male bee hummingbirds}, journal = {Evolution}, year = {2018}, month = {May-01-2020}, abstract = {

Phenotypic characters with a complex physical basis may have a correspondingly complex evolutionary history. Males in the \‘bee\’ hummingbird clade court females with sound from tail-feathers, which flutter during display dives. On a phylogeny of 35 species, flutter sound frequency evolves as a gradual, continuous character on most branches. But on at least six internal branches fall two types of major, saltational changes: mode of flutter changes, or the feather that is the sound source changes, causing frequency to jump from one discrete value to another. In addition to their tail \‘instruments\’, males also court females with sound from their syrinx and wing feathers, and may transfer or switch instruments over evolutionary time. In support of this, we found a negative phylogenetic correlation between presence of wing trills and singing. We hypothesize this transference occurs because wing trills and vocal songs serve similar functions and are thus redundant. There are also three independent origins of self-convergence of multiple signals, in which the same species produces both a vocal (sung) frequency sweep, and a highly similar non-vocal sound. Moreover, production of vocal, learned song has been lost repeatedly. Male bee hummingbirds court females with a diverse, coevolving array of acoustic traits.

}, keywords = {courtship, Mellisugini, Sonation, Wind Tunnel}, doi = {10.1111/evo.13432}, url = {http://doi.wiley.com/10.1111/evo.13432}, author = {Clark, Christopher J. and McGuire, Jimmy A. and Bonaccorso, Elisa and Berv, Jacob S. and Prum, Richard O.} } @article {47922, title = {When males whistle at females: complex FM acoustic signals in cockroaches}, journal = {Naturwissenschaften}, volume = {93}, year = {2006}, month = {Jan-10-2006}, pages = {500 - 505}, abstract = {

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. \“Pure whistles\” consist of two independent harmonic series fast frequency modulated with independent harmonics that can cross each other. \“Noisy whistles\” 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 (\>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.

}, keywords = {acoustic communication, Cockroach, courtship, Elliptorhina chopardi, frequency modulations, two-voice system}, issn = {0028-1042}, doi = {10.1007/s00114-006-0135-9}, url = {http://link.springer.com/10.1007/s00114-006-0135-9}, author = {Sueur, Jerome and Aubin, Thierry} } @article {47809, title = {Long-distance signals influence assessment of close range mating displays in the field cricket, Gryllus integer}, journal = {Biological Journal of the Linnean Society}, volume = {100}, year = {2010}, month = {Jan-08-2010}, pages = {856 - 865}, abstract = {

Male sexual displays often include components detected across long distances, and those perceived only at close range. Understanding what information females gain from each component of a complex display and how they use these signals to make decisions are questions of major interest in sexual selection research. We evaluated content-based hypotheses (\‘redundant signals\’ and \‘multiple messages\’) for the courtship displays of field crickets (Gryllus integer) by measuring female responses to males\’ long-distance calling song (calls) and close-range chemical cues. Females\’ responses to a male\’s calls and chemical cues were uncorrelated, supporting the \‘multiple messages\’ hypothesis. We also tested the \‘inter-signal interaction\’ hypothesis by investigating how long-distance calls influence evaluation of close-range courtship. The relationship between long- and close-range signals was complex and conditional: females accepted close-range courtship more quickly after exposure to attractive calling song than they did after exposure to either unattractive calling song or silence, and unattractive calls were no more or less effective than silence. This inter-signal interaction could affect our understanding of mate choice in species with multiple mating signals because it implies that females may save time and energy by not assessing the close-range signals of attractive long-distance signalers.

}, keywords = {acoustic signal, chemical cues, courtship, mate choice, multimodal signals, multiple cues, multiple messages, redundant signals}, doi = {10.1111/bij.2010.100.issue-410.1111/j.1095-8312.2010.01472.x}, url = {http://blackwell-synergy.com/doi/abs/10.1111/bij.2010.100.issue-4https://academic.oup.com/biolinnean/article-lookup/doi/10.1111/j.1095-8312.2010.01472.xhttps://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111\%2Fj.1095-8312.2010.01472.x}, author = {Anne S. Leonard and Ann V. Hedrick} }