Moving targets: collective decisions and flexible choices in house-hunting ants
Many decisions involve a trade-off between commitment and flexibility. We show here that the collective decisions ants make over new nest sites are sometimes sufficiently flexible that the ants can change targets even after an emigration has begun. Our findings suggest that, in this context, the ants’ procedures are such that they can sometimes avoid ‘negative information cascades’ which might lock them into a poor choice. The ants are more responsive to belated good news of a higher quality nest than they are when the nest they had initially chosen degraded to become worse than an alternative. Our study confirms, in a new way, that ant colonies can be very powerful “search engines”.
KeywordsSocial insects Decision-making Information cascades Multi-tasking Nest choice Temnothorax albipennis
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- Berman, S., Halász, Á., Kumar, V., & Pratt, S. (2006). Algorithms for the analysis and synthesis of a bio-inspired swarm robotic system. In Lecture notes in computer science : Vol. 4433. Proceedings of the 2nd SAB 2006 international workshop on swarm robotics (pp. 56–70). Berlin: Springer. Google Scholar
- Berman, S., Halász, Á., Kumar, V., & Pratt, S. (2007). Bio-inspired group behaviors for the deployment of a swarm of robots to multiple destinations. In Proceedings of the 2007 IEEE international conference on robotics and automation (pp. 2318–2323). Los Alamitos: IEEE Computer Society Press. CrossRefGoogle Scholar
- Bourke, A. F. G., & Franks, N. R. (1995). Social evolution in ants. Monographs in behavioral ecology (p. XIV+529). Princeton: Princeton University Press. Google Scholar
- Camazine, S., Deneubourg, J.-L., Franks, N. R., Sneyd, J., Theraulaz, G., & Bonabeau, E. (2001). Self-organization in biological systems. Princeton: Princeton University Press. Google Scholar
- Dean, T. L., & Boddy, M. (1988). An analysis of time-dependent planning. In T. M. Mitchell & G. Smith (Eds.), Proceedings of the seventh national conference on artificial intelligence (pp. 49–54). Menlo Park: AAAI Press. Google Scholar
- Franks, N. R. (1989). Army ants: a collective intelligence. American Scientist, 77, 138–145. Google Scholar
- Franks, N. R., Dornhaus, A., Metherell, B. G., Nelson, T. R., Lanfear, S. A. J., & Symes, W. S. (2006b). Not everything that counts can be counted: Ants use multiple metrics for a single nest trait. Proceedings of the Royal Society of London Series B, 273, 165–169. doi: 10.1098/rspb.2005.3312. CrossRefGoogle Scholar
- Seeley, T. D. (1995). The wisdom of the hive. Cambridge: Harvard University Press. Google Scholar