@article {58314, title = {Mate Choice Behavior of Female Field Crickets Is Not Affected by Exposure to Heterospecific Calling Songs}, journal = {Environmental Entomology}, year = {2020}, month = {Sep-04-2020}, abstract = {

Many animals produce acoustic signals to mark territories and attract mates. When different species produce acoustic signals simultaneously, the signals create a noisy environment, with potential acoustic interference between species. Theoretical studies suggest that such reproductive interference may have strong effects on species interaction. For example, the inferior resource competitor can survive if its disadvantage is counterbalanced by superiority in reproductive interference. Two field cricket species, Teleogryllus occipitalis (Audinet-Serville) (Orthoptera: Gryllidae) and Loxoblemmus equestris Saussure (Orthoptera: Gryllidae), cooccur in the same habitat. A previous study has shown that L. equestris is an inferior species to T. occipitalis in terms of resource competition. Therefore, we predicted that mate location and choice behavior of female T. occipitalis would be negatively affected by the acoustic signals of L. equestris and tested this with a series of playback experiments. The mate choice behavior of female T. occipitalis was not significantly affected by the calling song of L. equestris. Our results suggest that the acoustic interference does not explain the cooccurrence of the two species in the same habitat.

}, keywords = {acoustic communication, calling song, interspecific competition, Orthoptera, species interaction}, issn = {0046-225X}, doi = {10.1093/ee/nvaa034}, url = {https://academic.oup.com/ee/advance-article/doi/10.1093/ee/nvaa034/5818179}, author = {Kuriwada, Takashi and Kawasaki, Rintaro and Kuwano, Akifumi and Reddy, Gadi V P}, editor = {Ginzel, Matthew} } @article {47593, title = {Male{\textendash}male courtship behaviour, not relatedness, affects the intensity of contest competition in the field cricket}, journal = {Animal Behaviour}, volume = {126}, year = {2017}, month = {Jan-04-2017}, pages = {217 - 220}, abstract = {

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.

}, keywords = {intrasexual competition, kin selection, same-sex sexual behaviour, sexual selection, Teleogryllus occipitalis}, issn = {00033472}, doi = {10.1016/j.anbehav.2017.02.009}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0003347217300465}, author = {Kuriwada, Takashi} } @article {15453, title = {Volcanic ash decreases mating effort in the field cricket Gryllus bimaculatus (Orthoptera: Gryllidae)}, journal = {Journal of Asia-Pacific Entomology}, year = {2017}, month = {Jan-01-2017}, abstract = {

Volcanic eruptions have serious impacts on ecosystems from individual behavior to community structure. Volcanic ash has an especially widespread effect on organisms, as it can be dispersed over a greater distance by the wind than are other volcanic products. We examined the effect of volcanic ash on calling songs and mating behavior of the male field cricket Gryllus bimaculatus De Geer (Orthoptera: Gryllidae). Adult males were randomly assigned to one of four treatments comprising different floor material (volcanic ash, filter paper, vermiculite, and Akadama soil), and parameters of calling songs and mating behavior were measured. The dominant frequency of calling song lowered by the volcanic ash. Males reared on volcanic ash and soil exhibited lower calling rates per night. Furthermore, males reared on ash and vermiculite exhibited a longer latency to courtship period than those reared on the other floor materials. Our results showed that floor material does affect the mating efforts of male field crickets.

}, issn = {12268615}, doi = {10.1016/j.aspen.2017.01.005}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1226861516301960}, author = {Kuriwada, Takashi and Gadi V.P. Reddy} }