Fig 1 - available from: Oecologia
This content is subject to copyright. Terms and conditions apply.
Partial Least Squares-Discriminant Analysis (PLS-DA) based on emission rates according to treatment. Treatments: control (C), Handling (H), and Predator (P)

Partial Least Squares-Discriminant Analysis (PLS-DA) based on emission rates according to treatment. Treatments: control (C), Handling (H), and Predator (P)

Source publication
Article
Full-text available
Chemical communication plays an important role in mammalian life history decisions. Animals send and receive information based on body odour secretions. Odour cues provide important social information on identity, kinship, sex, group membership or genetic quality. Recent findings show, that rodents alarm their conspecifics with danger-dependent bod...

Contexts in source publication

Context 1
... investigate differences at the compound level, PLS-DA was performed for the emission rates of the individual compounds emitted for each treatment (Fig. 1). A global permutation test of the PLS-DA showed significant differences (PLS-DA, 999 permutations, P = 0.001), while a pairwise permutation test confirmed these (PLS-DA, 999 permutations, P = 0.001) for all three pairwise comparisons. An analysis of the ten compounds of interest revealed significantly higher ER in the P treatment ...
Context 2
... first result in the volatile compound (VOC) analyses shows clearly that a disturbed or scared individual smells differently than an undisturbed control vole (Fig. 1). The grouping of the different treatments clearly shows no overlap of the VOCs of animals from the control group and animals from either the handling or weasel exposure group. This simple result verifies the idea that animals can use body odours for signalling and information exchange between conspecifics (Flood 1992;Inagaki et al. ...

Similar publications

Article
Full-text available
To attract a mate, females of most moth species synthesize and emit sex pheromone from a specific gland in a behavior termed “calling”. In a broad temporal sense, calling behavior and pheromone synthesis are synchronized through the overlap of their circadian rhythms. However, the limited amount of pheromone a female produces each day must be manag...

Citations

... 1-Octanol in essential oils of plants has been reported as a biting deterrent in the mosquito Aedes aegypti 38 and as an oviposition deterrent in the Asian corn borer, Ostrinia furnacalis 39 . A recent study has shown 1-octanol to be a major component of the alarm pheromones in a mammal, the Bank vole Myodes glareolus 40 . However, the function of 1-octanol in O. smaragdina is currently unknown. ...
Article
Full-text available
Humans have used weaver ants, Oecophylla smaragdina, as biological control agents to control insect pests in orchards for many centuries. Over recent decades, the effectiveness of weaver ants as biological control agents has been attributed in part to deterrent and oviposition inhibiting effects of kairomones produced by the ants, but the chemical identity of these kairomones has remained unknown. We have identified the kairomone responsible for deterrence and oviposition inhibition by O. smaragdina, providing a significant advance in understanding the chemical basis of their predator/prey interactions. Olfactometer assays with extracts from weaver ants demonstrated headspace volatiles to be highly repellent to Queensland fruit fly, Bactrocera tryoni. Using electrophysiology and bioassays, we demonstrate that this repellence is induced by a single compound, 1-octanol. Of 16 compounds identified in O. smaragdina headspace, only 1-octanol evoked an electrophysiological response from B. tryoni antennae. Flies had greatly reduced oviposition and spent significantly less time in an olfactometer arm in the presence of 1-octanol or a synthetic blend of headspace volatiles containing 1-octanol than in the presence of a synthetic blend of headspace volatiles without 1-octanol, or clean air. Taken together, our results demonstrate that 1-octanol is the functional kairomone component of O. smaragdina headspace that explains repellence and oviposition deterrence, and is hence an important contributor to the effectiveness of these ants as biological control agents.