A Dynamic Individual-Based Model for High-Resolution Ant Interactions

Research output: Contribution to journalArticle

Abstract

Ant feeding interactions (i.e., trophallaxis events) are thought to regulate the flow of nutrients and disease within a colony. Consequently, there is great interest in learning which environmental and behavioral factors drive ant trophallaxis. In this paper, we analyze ant trophallaxis behavior in a colony of 73 carpenter ants, observed at 1-s intervals over a period of 4 h. The data represent repeated observations from a dynamic contact network; however, traditional statistical analyses of network models are ill-suited for data observed at such high temporal resolution. We present a model for high-resolution longitudinal network data, where the network is assumed to be a time inhomogeneous, continuous-time Markov chain, with transition rates modeled as a function of time-varying individual and pairwise biological covariates. In particular, the high temporal resolution of the data leads to a tractable likelihood function, and likelihood-based inference procedures are utilized to explain which biological factors drive contact. Our results reveal how differences in ant social castes and individual behaviors, such as ant speed and activity levels, influence patterns of ant trophallaxis in the colony. Supplementary materials accompanying this paper appear online.

Original languageEnglish (US)
Pages (from-to)589-609
Number of pages21
JournalJournal of Agricultural, Biological, and Environmental Statistics
Volume24
Issue number4
DOIs
StatePublished - Dec 1 2019

Fingerprint

Individual-based Model
individual-based model
Ants
trophallaxis
ant
Dynamic Model
Formicidae
High Resolution
Interaction
Markov processes
Nutrients
Dynamic Contact
Continuous-time Markov Chain
Likelihood Function
carpenter ants
Network Model
Covariates
Pairwise
Likelihood
Time-varying

All Science Journal Classification (ASJC) codes

  • Statistics and Probability
  • Agricultural and Biological Sciences (miscellaneous)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)
  • Statistics, Probability and Uncertainty
  • Applied Mathematics

Cite this

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A Dynamic Individual-Based Model for High-Resolution Ant Interactions. / Wikle, Nathan B.; Hanks, Ephraim M.; Hughes, David P.

In: Journal of Agricultural, Biological, and Environmental Statistics, Vol. 24, No. 4, 01.12.2019, p. 589-609.

Research output: Contribution to journalArticle

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