| Title: | No Evidence of Responding Individuals Constraining the Evolution of the Pheromone Signal in the Pine Engraver Ips avulsus |
| Author(s): | Queffelec J; Sullivan B; McKenney JL; Allison JD; |
| Address: | "Canadian Forest Service, Natural Resources Canada, Great Lakes Forestry Centre, 1219 Queen Street East, P6A2E5, Sault Ste. Marie, ON, Canada. queffelec.josephine@gmail.com. U.S. Forest Service, USDA, Southern Research Station, Pineville, USA. Department of Entomology, Louisiana State University, Baton Rouge, USA. Canadian Forest Service, Natural Resources Canada, Great Lakes Forestry Centre, 1219 Queen Street East, P6A2E5, Sault Ste. Marie, ON, Canada. Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa. Forestry and Agricultural Biotechnology Institute, Pretoria, South Africa" |
| DOI: | 10.1007/s10886-022-01396-w |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Print) 0098-0331 (Linking) |
| Abstract: | "Chemical signals are important mediators of interactions within forest ecosystems. In insects, pheromone signals mediate intraspecific interactions such as mate location and acceptance. The evolution of pheromones in insects has been mostly studied from a theoretical perspective in the Lepidoptera. With this study, we aimed to broaden our understanding of pheromone communication in bark beetles. We first demonstrated that the enantiomeric ratios of ipsdienol produced by male I. avulsus, showed little variation. Subsequently, with field trapping trials we characterized the influence of the enantiomeric ratio of ipsdienol (pheromone component of I. avulsus) on I. avulsus captures and observed a great amount of variation in the receiver preference function. Most importantly, we demonstrated that responding individuals responded indiscriminately to all the enantiomeric ratios produced by the emitting individuals. These observations are consistent with the asymmetric tracking model which postulates that if the limiting sex is the emitting sex, responding individuals should not discriminate between emitted ratios. Consequently, responding individuals do not constrain the evolution of the signal. Our data suggest that, in I. avulsus, the composition of the aggregation pheromone signal might be more responsive to external selection forces, such as predation and metabolic constraints, as suggested by the asymmetric tracking model" |
| Keywords: | Male Animals Monoterpenes/metabolism *Coleoptera/metabolism Pheromones/chemistry Ecosystem *Weevils *Pinus/metabolism Asymmetric tracking Bark beetle Enantiomeric ratio Ipsdienol Ipsenol; |
| Notes: | "MedlineQueffelec, Josephine Sullivan, Brian Mckenney, Jessica L Allison, Jeremy D eng 2022/12/11 J Chem Ecol. 2023 Feb; 49(1-2):11-17. doi: 10.1007/s10886-022-01396-w. Epub 2022 Dec 10" |
