Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"cuticular hydrocarbons"”.
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Recognition in burying beetles (Nicrophorus spp., Silphidae, Coleoptera)
… from individuals of different species. The cuticular hydrocarbons of various species of European and Canadian burying beetles were identified and quantified. Patterns of hydrocarbons were found to be species-specific. Statistical analyses were carried out to determine which hydrocarbons …
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Factors contributing to variation in cuticular hydrocarbon profiles of two species of longhorned beetles (Coleoptera: Cerambycidae)
In many insects, females have certain hydrocarbons in their cuticular hydrocarbon profile that serve as contact pheromones. These sex-specific mate recognition signals are present in much smaller quantities, or even absent in males. Although hydrocarbon profiles are to some degree heritable, the …
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Communication in the hymenoptera : chemistry, ecology and evolution
… of (Z)-11-eisosen-ol. The majority of the cuticular hydrocarbons of honeybees occur also in the headspace of foraging workers. These results strongly support the hypothesis that beewolf males evolved a pheromone that exploits the females’ pre-existing sensory sensitivity. In addition, the …
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Adhesive and frictional tarsal pads in stick insects
… contains a higher proportion of methylated cuticular hydrocarbons (CHCs), which are likely to increase fluidity and promote capillary forces. In contrast, the euplantulae feature denser, thinner cuticle fibers, resulting in greater stiffness and lower energy dissipation, their secretion …
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Co-operation and conflict in societies of the ponerine ant genus Pachycondyla
… before founding colonies. The analysis of cuticular hydrocarbons obtained from live queens revealed consistent differences between the patterns of cuticular hydrocarbons of queens with high vs. low rank: only high-ranking queens showed considerable amounts of cuticular pentadecane (n-C15) …
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Studies of the mechanisms involved in host finding and mating behaviour of the African coffee white stem borer, Monochamus leuconotus (pascoe) (Cleoptera: Cerambycidae)
… with the hexane washings, indicating that cuticular hydrocarbons are important for recognition of sex and species. A laboratory bioassay was developed for evaluating the olfactory response of M. leuconotus to different cues. Females responded positively to coffee leaves, coffee bark …
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Differentiation in reproductive potential and chemical communication of reproductive status in workers and queens of the ant Myrmecia gulosa
… were recognised by workers on the basis of cuticular as well as gland extracts or products. What is the exact function of the multiple pheromones identified and how they interact remains to be determined. This could help understand why queen "signal" in a "primitive" ant with weakly …
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Factors regulating signal composition and task allocation in colonies of the ant Myrmicaria eumenoides
… is their elaborate division of labour system. Cuticular hydrocarbons (CHCs) have long been implicated in nestmate recognition. In the African ant Myrmicaria eumenoides they also appear to vary with task. The factors regulating the task allocation (i.e. division of labour), as well as the CHC …
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The endocrinology and evolution of tropical social wasps: from casteless groups to high societies
… dominance, chemical signaling (e.g., cuticular hydrocarbons (CHCs)) in queens while promoting the early onset of certain tasks in workers. Evidence for a similar mechanism in bees and ants suggests a dual function of JH was intact in the last common ancestor of these groups (the …
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Ecological and molecular basis of differential resource use in populations of burying beetles Nicrophorus vespilloides
… We also found little evidence that a beetle’s cuticular hydrocarbons predict the carrion it will be attracted to in nature. However, we did find seasonal variation in the cuticular hydrocarbon profiles of wild-caught beetles that could be related to beetle quality or breeding status. In short, …
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Ganaspis kimorum as a classical biological control agent for Drosophila suzukii: from laboratory studies to field assessments
… G. kimorum females were attracted by host’s cuticular hydrocarbons present in fruits infested with young larvae, they were repelled by fermentation compounds found in older and deteriorated fruits. Vibrational assays revealed that D. suzukii larvae produce incidental vibrations in the form of …
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Reduced cuticular penetration as a contributor to insecticide resistance in the common bed bug, Cimex lectularius L.
… study, we investigated the mechanisms of reduced cuticular penetration type insecticide resistance in bed bugs. First, we determined and compared the lethal dosage (LD50) of a pyrethroid insecticide using topical and injection application. The resistant strain not only had significantly greater …
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Identifying mechanisms of pyrethroid resistance in the navel orangeworm and novel methods of control
… two were associated with the synthesis of cuticular hydrocarbons (CHCs) in the CYP4G subfamily, which has been linked to resistance in other insects by preventing or delaying passage of insecticides across the cuticle. CHCs were then extracted and quantified between the susceptible and …