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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kim, Hokyung Jang, Yikweon Choe, Jae C. |
| Copyright Year | 2011 |
| Abstract | Sexual dimorphism, the difference between the sexes in secondary sexual characters, is in general driven by processes of sexual selection. The horn-headed cricket, Loxoblemmus doenitzi, exhibits sexual dimorphism in head shape. Males have flat heads and triangular horns on both sides of their heads, whereas females have rounded heads and no horns. We hypothesized that male horns have evolved due to intra-sexual selection, in which males use these horns as weapons in aggressive interactions. We tested two predictions of this hypothesis by conducting agonistic trials with field-caught males of L. doenitzi: (1) the horns should be used in agonistic interactions between males, and (2) the asymmetry in horn size or horn use may determine contest outcome. Horn length was significantly correlated with thorax length and hind femur length. During agonistic interactions, males aggressively used their horns by beating the opponent’s horns with their own or by poking the opponent’s body. However, logistic regression analysis revealed that neither horn length nor horn use were significant factors for contest outcome. Instead, body size was significant for determining contest outcome. We discuss possible scenarios for evolution of male horns in L. doenitzi. |
| Starting Page | 435 |
| Ending Page | 441 |
| Page Count | 7 |
| File Format | |
| ISSN | 02890771 |
| Journal | Journal of Ethology |
| Volume Number | 29 |
| Issue Number | 3 |
| e-ISSN | 14395444 |
| Language | English |
| Publisher | Springer Japan |
| Publisher Date | 2011-05-11 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Loxoblemmus doenitzi Sexual dimorphism sexual character Agonistic behavior Calling song character Neurosciences Zoology Evolutionary Biology Behavioural Sciences Animal Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
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