01693nas a2200205   4500008004100000022001300041245012000054210007100174260001600245300001400261490000800275520099000283653002801273653001801301653003001319653002101349653002901370100002201399856006601421       2017                        eng d  a0003347200aMale–male courtship behaviour, not relatedness, affects the intensity of contest competition in the field cricket0 aMale–male courtship behaviour not relatedness affects the intens  cJan-04-2017  a217 - 2200 v1263 a<p>Males often compete intensely against rival males because access to females is a major factor contrib- uting to their reproductive success. However, there is controversy over whether maleemale competition is weakened when rival males are related, with reduced aggressiveness leading to inclusive fitness benefits. Furthermore, same-sex sexual behaviour is also expected to mitigate maleemale contests. Here, I examined how relatedness, developmental familiarity (i.e. males reared in the same container or not) and same sex sexual behaviour affect the intensity of maleemale competition in wild-caught field crickets, Teleogryllus occipitalis. Relatedness and familiarity had no significant effect on the intensity of maleemale contest behaviour. However, same-sex sexual behaviour did weaken maleemale competi- tion. In conclusion, my results indicate that same-sex sexual behaviour in this cricket has adaptive sig- nificance by mitigating risky maleemale contest behaviour.</p>
10aintrasexual competition10akin selection10asame-sex sexual behaviour10asexual selection10aTeleogryllus occipitalis1 aKuriwada, Takashi  uhttp://linkinghub.elsevier.com/retrieve/pii/S0003347217300465