01956nas a2200145   4500008004100000022001400041245004800055210004800103260001600151520144000167100002801607700002601635700002001661856012901681       2017                        eng d  a0024-406600aEvolution of synchronies in insect choruses0 aEvolution of synchronies in insect choruses  cFeb-09-20173 a<p>In many acoustic insects, neighbouring males adjust their calling rhythms and broadcast a temporally structured chorus ranging from an irregular mixture of alternation and synchrony to a nearly perfect synchrony wherein most males sing in unison. Irregular synchrony can arise where females ignore calls that follow a neighbour&rsquo;s call by a brief delay, a perception that selects for competitive male adjustments to calling rhythm that increase leading calls and ultimately yield alternation and synchrony. Such chorusing emerges as an incidental property, and the collective temporal structure may have little significance for females and males. More perfect synchronies are expected where females must perceive distinct sound envelopes before approaching a chorus or a given male. Here, selection will favour cooperative male adjustments by which neighbours align their calls, as any male who does not adjust would reduce the group&rsquo;s attractiveness and therefore his own. We tested these expectations in two sympatric bushcrickets, Ephippiger diurnus and Sorapagus catalaunicus, that exhibit irregular and more perfect synchrony, respectively. We found, however, that females in both species prefer leading calls and must hear distinct sound envelopes. We infer that fundamental differences in perception and singing influence the relative importance of competition and cooperation, producing the two synchronies.</p>
1 aGreenfield, Michael, D.1 aMarin-Cudraz, Thibaut1 aParty, Virginie  uhttp://academic.oup.com/biolinnean/article/doi/10.1093/biolinnean/blx096/4103004/Evolution-of-synchronies-in-insect-choruses02521nas a2200217   4500008004100000022001300041245011500054210006900169260001600238300001200254490000800266520178700274653003502061653001802096653003602114653002302150653002202173653002402195100001802219856006602237       2017                        eng d  a0003347200aWhen do acoustic cues matter? Perceived competition and reproductive plasticity over lifespan in a bushcricket0 aWhen do acoustic cues matter Perceived competition and reproduct  cJan-06-2017  a41 - 490 v1283 a<p>Individuals often modify their behaviour in response to environmental cues and their own condition. Here we asked whether males modify ejaculates based on information from the sociosexual environment and their physiological age, and how those two factors may interact. We used two populations of the chorusing bushcricket, Ephippiger diurnus, to test whether males strategically adjust large, costly spermatophores they transfer to females during mating based on experience of rivals&#39; calls, and whether males change their investment strategies with age. Males broadcast highly consistent, rhythmically repeated calls of syllables in daily choruses. Populations differ in average syllable number, an important trait under selection via female preference, and females from our two populations prefer calls with more syllables than the population mean. We reared males in one of five acoustic environments that varied in call syllable number. We then mated males twice, as young and old adults, measuring spermatophore size each time. We found that acoustic experience, age and their interaction all significantly influenced male investment, resulting in reaction norms with different slopes. Young males differentially invested in spermatophores in response to acoustic experience, whereas old males generally invested in larger spermatophores across environments. We then tested for a broad pattern of age-related investment with eight different field-collected populations, finding the majority of old males significantly increased spermatophore investment. Our findings demonstrate that both environmental context and an individual&#39;s life history state influence plasticity in reproductive investment, and such adjustments may optimize their reproductive success.</p>
10aexperience-mediated plasticity10anuptial gifts10apostcopulatory sexual selection10asocial environment10asperm competition10aterminal investment1 aRebar, Darren  uhttp://linkinghub.elsevier.com/retrieve/pii/S000334721730075100278nas a2200085   4500008004100000245004700041210004700088100001600135856004100151       1879                        eng d00aUber den Tonapparat von Ephippigera vitium0 aUber den Tonapparat von Ephippigera vitium1 aBertkau, P.  uhttps://bio.acousti.ca/it/node/1725400523nas a2200133   4500008004100000022001400041245014600055210006900201260001600270300000800286490000900294100002900303856005700332       2017                        eng d  a1175-532600aLluciapomaresius nisae, a new species of Ephippigerini (Orthoptera: Tettigoniidae: Bradyporinae) from the northeast of the Iberian Peninsula0 aLluciapomaresius nisae a new species of Ephippigerini Orthoptera  cApr-01-2018  a1230 v42211 aOlmo-Vidal, Josep, Maria  uhttp://biotaxa.org/Zootaxa/issue/view/zootaxa.4221.1