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Here's the wiki for Holldobler & Wilson. Have fun!

This paper is discussing the three reasons ants communicate (food, defense, territory) and the various ways they communicate (2 pheromone glands and antenna-movement/touching as well as food sharing and body jerks).

One of the main questions of the article was "Is it possible that the anal liquid contains pheromones by which the ants recognize their own territories and avoid -- or at least respond differently to -- the territories of other colonies?" (p. 50) In other words, it had already been determined that the ants mark their territories with these anal spots, but does that also serve the purpose of being specific to a single group of ants so that they mark their territory against an enemy group (of the same species)?

The answer is yes. There is a group pheromone which is persistent. (Ants responded to an enemy groups pheromone just as strongly 12 days later).

The ants also have the advantage in a fight if they were in "a familiar odor environment" (p. 56) which they say is more proof of the territorial pheromone.

How this article concludes and ties into anything we would deem relevant: "The question of interest is why the African weaver any employs more complex communication. We suggest that it is a combination of the large worker size and strongly arboricolous life characteristics of the species, which two modifications have it advantageous for //O. longinoda// colonies to maintain total and strict control over the areas surrounding their nests." (p.58)

Also: "the close similarity between recruitment to invaders and recruitment to food makes more sense: they can be conceived as merely ends of a single continuum." (p. 59) Which is to say, enemies are killed and brought back to the nest as food, and because of that they are no different than simply food. This means the ideas of "recruitment to invaders" and "recruitment to food" are very similar endeavors.

In my view, this research shows that even the most simple chemical reactions can lead to complex behavior patterns. It is interesting that the ants rely on scouts for recruiting, thus promoting division of communication roles and differentiation of messages. Yet the lack of subtext, nuanced meaning, and other complex neural structures limits communication to basic messages. We can categorize these signals as territory, food, and enemy (of which the last two are often treated the same).