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2014 ; 11
(101
): 20140951
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Social insect colony as a biological regulatory system: modelling information
flow in dominance networks
#MMPMID25320069
Nandi AK
; Sumana A
; Bhattacharya K
J R Soc Interface
2014[Dec]; 11
(101
): 20140951
PMID25320069
show ga
Social insects provide an excellent platform to investigate flow of information
in regulatory systems since their successful social organization is essentially
achieved by effective information transfer through complex connectivity patterns
among the colony members. Network representation of such behavioural interactions
offers a powerful tool for structural as well as dynamical analysis of the
underlying regulatory systems. In this paper, we focus on the dominance
interaction networks in the tropical social wasp Ropalidia marginata-a species
where behavioural observations indicate that such interactions are principally
responsible for the transfer of information between individuals about their
colony needs, resulting in a regulation of their own activities. Our research
reveals that the dominance networks of R. marginata are structurally similar to a
class of naturally evolved information processing networks, a fact confirmed also
by the predominance of a specific substructure-the 'feed-forward loop'-a key
functional component in many other information transfer networks. The dynamical
analysis through Boolean modelling confirms that the networks are sufficiently
stable under small fluctuations and yet capable of more efficient information
transfer compared to their randomized counterparts. Our results suggest the
involvement of a common structural design principle in different biological
regulatory systems and a possible similarity with respect to the effect of
selection on the organization levels of such systems. The findings are also
consistent with the hypothesis that dominance behaviour has been shaped by
natural selection to co-opt the information transfer process in such social
insect species, in addition to its primal function of mediation of reproductive
competition in the colony.
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