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It is well stablished that danger information can be transmitted by antsthrough relatively small distances, provoking either a state of alarm when theymove away from potentially dangerous stimulus, or charge toward itaggressively. There is almost no knowledge if danger information can betransmitted along large distances. In this paper, we perturb leaf cutting antsof the species Atta insularis while they forage in their natural evioronment ata certain point of the foraging line, so ants make a "U" turn to escape fromthe danger zone and go back to the nest. Our results strongly suggest thatthose ants do not transmit "danger information" to other nestmates marchingtowards the danger area. The individualistic behavior of the ants returningfrom the danger zone results in a depression of the foraging activity due tothe systematic sacrifice of non-informed individuals.

Uninformed sacrifice: evidence against long-range alarm transmission in foraging ants exposed to a localized perturbation