Social interactions affect the choice of food patches in suggests a role of Z4-11Al in the formation of fly clusters at food sources.

Combined pheromone and food odour tuning by the two Or69a variants underscores the tie between sexual and natural selection during the evolution of specific mate communication, and is a convincing mechanism for the sensory drive hypothesis.

Projection neurons from the DA1 glomerulus, responding to the male-produced aphrodisiac c VA, are one important source of input [].

Or69a is the first olfactory gene known to encode dual olfactory traits; Or69a A and Or69a B achieve a coordination of sex and food stimuli already in first order neurons, at the antennal periphery.

We therefore collected volatile compounds released by flies in a glass aeration apparatus and found 16 aliphatic aldehydes, according to chemical analysis by gas chromatography-mass spectrometry (GC-MS).

Males and females shared saturated aldehydes with a carbon chain length of C7 to C18, but mono-unsaturated aldehydes were released by females only (Fig. Female-specific compounds are coloured, the most abundant cuticular hydrocarbon, 7-tricosene (17), is shown for reference, the internal standard (IS) was heptadecyl acetate.

Pheromones are released into an atmosphere that is filled with environmental, habitat-related odorants, some of which manifest mating sites and food sources.

The response to sex pheromones and food or habitat olfactory cues (kairomones) falls under sexual and natural selection, respectively.

Pheromones and kairomones are always perceived as an ensemble in a natural context, leading to an interaction of sexual and natural selection during adaptive divergence of sexual signalling, which is thought to facilitate premating reproductive isolation [ social communication.

A pair of Ors, feeding into the same neural circuit, has developed a dual affinity to this pheromone and to environmental semiochemicals, encoding adult and larval food.

A tentative explanation for the significantly reduced attraction response of ], and the interaction between these input channels with Or69a may be sexually dimorphic.