In "Food odors trigger Drosophila males to deposit a pheromone that guides aggregation and female oviposition decisions," Lin et al. report that food odors trigger male fruit flies to deposit an aggregation pheromone that also influences female oviposition preference.
Gustatory response scores (GRSs) and odor-memory retrieval were measured in bees that were previously exposed to changes in food characteristics.
Several recent studies have begun to classify the function of the iPNs and have shown a role in odor discrimination, in inhibiting food odor processing, and in pheromone-mediated behaviors.
Thus, DTKR signaling is necessary for starvation-dependent change in food search behavior at high, but not low odor concentrations.
The increased number of trophallaxis events under the scented food condition could be caused by changes in the gustatory perception of the bees involved, in addition to the presence of an already learned odor inside the colony that could release a CR (i.e. PER to the food odor) in potential food receivers.
This can be calculated by taking into account the probability that the nearby environment would emit food odor and then estimating the change in information the animal expects will result from any detection or non-detection events (Vergassola et al., 2007).
As noted above, the consequences of odor-fear conditioning include both learning specific associative fear responses such as freezing to the conditioned odor, and also changes in odor acuity, i.e., perceptual learning.
It is reflected in the two terms in the sensory index, one depending on the food odor concentration, the other one depending on the product of food odor and pheromone concentration.
It leads to changes in texture, flavor, odor, and quality of foods.
