Sperm Competition in the Field Cricket Gryllus integer (Orthoptera: Gryllidae)

1986 ◽  
Vol 69 (4) ◽  
pp. 722 ◽  
Author(s):  
Vickie L. Backus ◽  
William H. Cade
Keyword(s):  
Sperm Competition ◽  
Field Cricket ◽  
Gryllus Integer

scholarly journals Integrating behaviour with life history: boldness of the field cricket, Gryllus integer, during ontogeny

2011 ◽  
Vol 26 (2) ◽  
pp. 450-456 ◽  
Author(s):  
Petri T. Niemelä ◽  
Anssi Vainikka ◽  
Ann V. Hedrick ◽  
Raine Kortet
Keyword(s):  
Life History ◽  
Field Cricket ◽  
Gryllus Integer

Differences in age structure among field cricket populations (Orthoptera; Gryllidae): possible influence of a sex-biased parasitoid

1995 ◽  
Vol 73 (7) ◽  
pp. 1207-1213 ◽  
Author(s):  
Anne-Marie Murray ◽  
William H. Cade
Keyword(s):  
Cross Sections ◽  
Age Structure ◽  
Life History Traits ◽  
Mating Behaviour ◽  
Field Cricket ◽  
Male Mating ◽  
Ormia Ochracea ◽  
Age Patterns ◽  
Gryllus Integer ◽  
Study Species

This study examined age structure in adult populations of three species of field cricket, Gryllus veletis, G. pennsylvanicus, and G. integer. Adults were aged by counting growth layers in cross sections of tibiae. The study species differ in several life-history traits including the likelihood of parasitism by Ormia ochracea, a tachinid that orients to calling males. Gryllus integer is parasitized whereas G. veletis and G. pennsylvanicus are not. Such differences between the species should result in different age patterns. Data from field collections demonstrated that adult G. veletis and G. pennsylvanicus had similar maximum life-spans of about 4 weeks, and males were similar in age or slightly older than females. The maximum age for female G. integer was also about 4 weeks, but few males > 20 days old were encountered. Moreover, male G. integer were significantly younger than females in five out of six samples. This pattern in G. integer, evident in 2 successive years, could be consistent with sex-biased mortality by Ormia ochracea. The results are discussed in relation to differential longevities and the intensity of sexual selection on male mating behaviour.

Temporal patterns of parasitoid fly (Ormia ochracea) attraction to field cricket song (Gryllus integer)

1996 ◽  
Vol 74 (2) ◽  
pp. 393-395 ◽  
Author(s):  
William H. Cade ◽  
Mark Ciceran ◽  
Anne-Marie Murray
Keyword(s):  
Mating Behaviour ◽  
Calling Song ◽  
Field Cricket ◽  
Lower Probability ◽  
Ormia Ochracea ◽  
The Hours ◽  
Cricket Song ◽  
Temporal Rate ◽  
Gryllus Integer ◽  
Male Cricket

Female flies, Ormia ochracea (Diptera, Tachinidae), orient to the calling song of the field cricket Gryllus integer (Orthoptera, Gryllidae) and deposit larvae that burrow into and consume the cricket host. Selection pressure from O. ochracea has probably been important in the evolution of male cricket songs and mating behaviour in G. integer and other cricket species. Tape-recorded G. integer calling song was broadcast to study the temporal rate of attraction of O. ochracea. Flies became phonotactic to cricket song approximately at sunset, and the highest level of attraction was observed in the following hours of the evening. Fly phonotaxis decreased in the hours immediately preceding sunrise and no flies were attracted during daylight hours. More male G. integer call at sunrise and in the preceding hours than earlier in the evening, perhaps in response to the lower probability of attracting O. ochracea.

scholarly journals Sex-specific behavioral syndromes allow the independent evolution of behavioral dimorphism

2021 ◽  
Author(s):  
Raphaël Royauté ◽  
Ann Hedrick ◽  
Ned A. Dochtermann
Keyword(s):  
Genetic Correlations ◽  
Field Cricket ◽  
Behavioral Syndromes ◽  
Phenotypic Traits ◽  
Multiple Traits ◽  
Constrained Evolution ◽  
Genetic Level ◽  
Males And Females ◽  
Male Activity ◽  
Gryllus Integer

When selection differs by sex, the capacity for sexes to reach optimal phenotypes can be constrained by the shared genome of males and females. Because phenotypic traits are often correlated, this difference extends across multiple traits and underlying genetic correlations can further constrain evolutionary responses. Behaviors are frequently correlated as behavioral syndromes, and these correlations often have a genetic basis. However, whether cross-sex and across behavior correlations lead constrained evolution remains unknown. Here, we show that a boldness-activity syndrome is strongly sex-specific at the genetic level in the western field cricket (Gryllus integer) and that emergence from a shelter is genetically independent between males and females. However, male activity is strongly related to female shelter emergence, creating the potential for biased responses to selection. Our results show that the sex-specific genetic architecture of behavioral syndromes can shape the evolution of behavioral phenotypes.

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