| Title: | "Local, Geographical, and Contextual Variation in the Aggregation Pheromone Blend of the Spruce Beetle, Dendroctonus rufipennis (Coleoptera: Curculionidae)" |
| Author(s): | Isitt RL; Bleiker KP; Pureswaran DS; Hillier NK; Huber DPW; |
| Address: | "Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada. risitt@unb.ca. Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, British Columbia, Canada. risitt@unb.ca. Canadian Forest Service, Pacific Forestry Centre, Victoria, British Columbia, Canada. Canadian Forest Service, Laurentian Forestry Centre, Quebec City, Quebec, Canada. Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada. Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, British Columbia, Canada" |
| DOI: | 10.1007/s10886-020-01185-3 |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "Prior research from trapping experiments using synthetic pheromone components suggested the existence of local and geographical variation in the pheromone system of the spruce beetle, Dendroctonus rufipennis (Kirby). To test hypotheses concerning variation in the spruce beetle's aggregation pheromone blend, we extracted volatiles from the hindguts of individual spruce beetles sampled from sites in eastern Canada (Nova Scotia and Newfoundland) and western Canada (British Columbia and Alberta) and quantified the amounts of four known aggregation pheromone components within each sample. Chiral analyses were performed on a subset of samples. Frontalin (1,5-dimethyl-6,8-dioxabicyclo[3.2.1]octane) was more dominant in western Canada, whereas MCOL (1-methyl-2-cyclohexen-1-ol) and seudenol (3-methyl-2-cyclohexen-1-ol) were more dominant in the east. Verbenene (4-methylene-6,6-dimethylbicyclo[3.1.1]hept-2-ene) was prevalent only in one of our six sites (Rocky Mountain House, AB). Female beetles in Rocky Mountain House (AB) also produced a higher proportion of (+)-frontalin than females from the other sites, and a comparison to previously published data suggests additional geographic variation that was not captured among our sites. When paired with a male in a gallery, female spruce beetles produced pheromone blends with more frontalin and less MCOL compared to solitary female beetles. Our results show that variation in the spruce beetle's pheromone blend exists at both large and small spatial scales, possibly a consequence of local selective pressures and assortative mating" |
| Keywords: | Animals Canada Female Geography Male Pheromones/*chemistry Weevils/*chemistry Bark beetle Dendroctonus rufipennis Frontalin Pheromone variation Seudenol Verbenene; |
| Notes: | "MedlineIsitt, R L Bleiker, K P Pureswaran, D S Hillier, N K Huber, D P W eng 2020/06/20 J Chem Ecol. 2020 Jun; 46(5-6):497-507. doi: 10.1007/s10886-020-01185-3. Epub 2020 Jun 16" |
