Centrifugal waste disposal and the optimization of ant nest craters

N R Franks, N F Britton, A B Sendova-Franks, A J Denny, E L Soans, A P Brown, R E Cole, R J Havardi, C J Griffiths, S R Ellis

Research output: Contribution to journalArticle

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Abstract

We considered how ant, Tapinoma simrothi, colonies dispose of the material generated by their nest excavations in nest entrance craters. We developed a model for optimum crater formation on both flat and sloping ground (although we have not solved it in full generality for sloping ground). We found that the ants, when working on flat ground, show a close approximation to this least costly waste disposal. Craters on slopes may not be optimal even though they will be cheaper to make than ones of a similar volume on level ground. We further tested the model with a manipulative experiment, which also suggested the simple rule of thumb that ants might use. In response to having one-quarter of their crater removed, the ants focused most of their further waste disposal in that quarter. This suggests that their rule of thumb may be to deposit material at the nearest point with an angle of elevation less than that of the optimal angle. This should generate symmetrical craters on flat ground. The model also makes certain additional and testable predictions about the fine structure of craters.
LanguageEnglish
Pages965-973
Number of pages9
JournalAnimal Behaviour
Volume67
StatusPublished - 2004

Fingerprint

ant nests
waste disposal
crater
ant
nest
Formicidae
Tapinoma
nests
prediction
excavation
experiment

Keywords

  • NAVIGATION
  • TIME
  • LANDMARKS
  • LEAF-CUTTING ANT
  • COST
  • HYMENOPTERA
  • LEPTOTHORAX-ALBIPENNIS
  • FORMICA-RUFA

Cite this

Franks, N. R., Britton, N. F., Sendova-Franks, A. B., Denny, A. J., Soans, E. L., Brown, A. P., ... Ellis, S. R. (2004). Centrifugal waste disposal and the optimization of ant nest craters. Animal Behaviour, 67, 965-973.

Centrifugal waste disposal and the optimization of ant nest craters. / Franks, N R; Britton, N F; Sendova-Franks, A B; Denny, A J; Soans, E L; Brown, A P; Cole, R E; Havardi, R J; Griffiths, C J; Ellis, S R.

In: Animal Behaviour, Vol. 67, 2004, p. 965-973.

Research output: Contribution to journalArticle

Franks, NR, Britton, NF, Sendova-Franks, AB, Denny, AJ, Soans, EL, Brown, AP, Cole, RE, Havardi, RJ, Griffiths, CJ & Ellis, SR 2004, 'Centrifugal waste disposal and the optimization of ant nest craters' Animal Behaviour, vol. 67, pp. 965-973.
Franks NR, Britton NF, Sendova-Franks AB, Denny AJ, Soans EL, Brown AP et al. Centrifugal waste disposal and the optimization of ant nest craters. Animal Behaviour. 2004;67:965-973.
Franks, N R ; Britton, N F ; Sendova-Franks, A B ; Denny, A J ; Soans, E L ; Brown, A P ; Cole, R E ; Havardi, R J ; Griffiths, C J ; Ellis, S R. / Centrifugal waste disposal and the optimization of ant nest craters. In: Animal Behaviour. 2004 ; Vol. 67. pp. 965-973.
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