Even though aggregation and attraction to food odors are
very similar behaviors — locomotion to a desirable odor
source — the biological roles of these two behaviors are
unique. For males and virgin females, aggregation behavior
provides a means to increase chance encounters for
mating. For gravid females, it serves as a locator of
oviposition sites, used previously by other females.
And for larvae hatching from eggs laid by attracted
females, aggregation behavior assures optimal growth
conditions through appropriately high larval density. This
is important for food quality, low mortality rates, and
achieving short developmental periods [44