02711nas a2200217   4500008004100000022001300041245011300054210006900167260001600236300001200252490000800264520182600272653003202098653002002130653002402150653002402174653002702198100001802225700001702243856023302260       2018                        eng d  a0003347200aObligate, but not facultative, satellite males prefer the same male sexual signal characteristics as females0 aObligate but not facultative satellite males prefer the same mal  cJan-10-2018  a37 - 430 v1443 a<p>Signalling is energetically expensive and increases the risk of predation and parasite infection. To balance the costs and benefits of mate attraction, individuals may adopt an alternative mating strategy such as satellite behaviour, in which nonsignalling males will settle near signalling males and attempt to intercept approaching females. While many suggest that alternative strategies are &lsquo;making the best of a bad job&rsquo;, little research has examined whether satellites, particularly obligate satellites, have the potential to increase their mating success by preferentially targeting more attractive signallers. Using the Pacific field cricket, Teleogryllus oceanicus, we tested the hypothesis that males are more likely to act as satellites to signalling males with particularly attractive songs, as these callers are likely to attract the most females. In this species, a novel male wing mutation, &lsquo;flatwing&rsquo;, renders some males unable to call. Flatwings are obligate satellites, while nonmutated, normal-wing males switch between calling and satellite strategies. We presented males with calling song models varying in the percentage of long-to-short chirps, a characteristic important in female choice. As was shown for females in previous work, flatwings exhibited a strong preference for calling songs composed of 60% long chirp. Normal wing males did not prefer any particular calling song model. Our results lead to the paradoxical conclusion that males with highly attractive songs may not have the highest mating success. Such male preference for male sexual signals may oppose selection by females and increase competition between signalling and satellite males. This could potentially slow the rate of male trait evolution and influence the evolution of male competition.</p>
10aalternative mating strategy10arapid evolution10asatellite behaviour10asignal exploitation10aTeleogryllus oceanicus1 aOlzer, Rachel1 aZuk, Marlene  uhttps://linkinghub.elsevier.com/retrieve/pii/S000334721830229Xhttps://api.elsevier.com/content/article/PII:S000334721830229X?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S000334721830229X?httpAccept=text/plain01894nas a2200229   4500008004100000022001400041245006100055210006000116260001600176300001400192520113100206653002501337653002001362653001801382653002701400100002701427700001701454700003201471700002601503700002201529856011301551       2018                        eng d  a0003-014700aPurring Crickets: The Evolution of a Novel Sexual Signal0 aPurring Crickets The Evolution of a Novel Sexual Signal  cMar-10-2018  a000 - 0003 a<p>Opportunities to observe contemporary signal change are incredibly rare but critical for understanding how diversity is created and maintained. We discovered a population of the Pacific field cricket (Teleogryllus oceanicus) with a newly evolved song (purring), different from any known cricket. Male crickets use song to attract females from afar and to court females once near. Teleogryllus oceanicus is well known for sexual signal evolution, as exemplified by a recent signal loss. In this study, we characterized the new purring sound and investigated the role of the purr in long-distance and short-distance communication. The purring sound differed from typical ancestral calls in peak frequency, amplitude, and bandwidth. Further, the long-distance purring song facilitated mate location, though the role of courtship purring song is less clear. Our discovery of purring male crickets is an unprecedented opportunity to watch the emergence of a newly evolved sexual signal unfold in real time and has potential to illuminate the mechanisms by which evolutionary novelties arise and coevolve between the sexes.</p>
10aevolutionary novelty10arapid evolution10asexual signal10aTeleogryllus oceanicus1 aTinghitella, Robin, M.1 aBroder, Dale1 aGurule-Small, Gabrielle, A.1 aHallagan, Claudia, J.1 aWilson, Jacob, D.  uhttps://www.journals.uchicago.edu/doi/10.1086/700116https://www.journals.uchicago.edu/doi/pdf/10.1086/700116