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Artificial Life and Robotics

, Volume 23, Issue 4, pp 444–448 | Cite as

Behavioral pattern of pill bugs revealed in virtually infinite multiple T-maze

  • Jin Murano
  • Meiji Mitsuishi
  • Toru Moriyama
Original Article
  • 646 Downloads

Abstract

A behavior called turn alternation has been studied extensively in terrestrial isopods. This behavior is seen when they alternate their path choice on successive trials of the T-maze test. We made the multiple T-maze device which consists of two turntables with a T-maze mounted on each and examined the behavior of 36 pill bugs (Armadillidium vulgare) that each completed 130 successive T-maze trials. As a result, in addition to turn alternation, turn repetition (turning in the same direction on two successive turns) appeared at a rate of 20%. In the turn sequences, we observed segments consisting of successive turn alternations and defined the number of turn alternations in a segment as the length of it. Cumulative frequency distribution of segment lengths obeyed power law with exponent of 1.76. This result suggests that pill bugs in the multiple T-maze device behaved as Lévy walkers which forage in an environment, where resources are unpredictably distributed.

Keywords

Lévy walk Multiple T-maze Pill bug Turn alternation Turn repetition 

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Copyright information

© ISAROB 2018

Authors and Affiliations

  1. 1.Department of BioengineeringShinshu UniversityUedaJapan

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