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No evidence for tactile communication of direction in foraging Lasius ants

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JournalInsectes Sociaux
DateAccepted/In press - 25 Sep 2017
DateE-pub ahead of print - 4 Oct 2017
DatePublished (current) - 1 Feb 2018
Issue number1
Volume65
Number of pages10
Pages (from-to)37-46
Early online date4/10/17
Original languageEnglish

Abstract

The idea that ants communicate when meeting on a trail is beguiling, but evidence for this is scarce. Physical communication in ants has been demonstrated to play a role as a modulator of behaviours such as alarm and recruitment. Honeybees can communicate the location of a resource using an advanced motor display – the waggle dance. However, no equivalent of the waggle dance has been described for any ant species, and it is widely believed that ants cannot communicate the location of resources using motor displays. One group of researchers report several demonstrations of such communication in Formica ants; however, these results have been largely ignored. More recently some evidence arose that Lasius niger foragers returning from a food source can communicate to outgoing foragers the direction that should be taken at the next bifurcation by means of physical contact on the trail. Here, we make a concerted effort to replicate these results. Although initial results seemed to indicate physical communication, once stringent controls to eliminate pheromone cues were put in place, no evidence for physical communication of food location could be found. This null result was replicated independently by a different research group on a closely related species, L. neglectus. We conclude that neither L. niger nor L. neglectus foragers communicate resource location using physical contact. Our results increase the burden of proof required for other claims of physical communication of direction in ants, but do not completely rule out this possibility.

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© International Union for the Study of Social Insects (IUSSI) 2017.
This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

    Research areas

  • foraging, communication , ants, information theory, social insects, pheromones, recruitment, Lasius niger, Distance homing, Tactile communication, Motor displays, Lasius neglectus, Antennation

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