Rhythmic signalling and entrainment in Vespa orientalis larvae: Characterization of the underlying interactions

Vered Barenholz-Paniry, Jacob S. Ishay, Zvi Grossman

Research output: Contribution to journalArticlepeer-review

Abstract

Rhythmic "circa-second" contrations of larvae of the hornet Vespa orientalis, believed to serve as hunger signals, were studied. A considerable degree of coordination among individual larvae, both in frequency and phase of these contractions, has been observed. The oscillations of singly isolated larvae are of short duration, non-constant, with increasing intervals in between and there is a substantial variability in the patterns shown by different larvae. In contrast, the association of two or more larvae leads to enhancement of their periodic behaviour and to (partial) entrainment. Communication among larvae may perhaps be mediated by the sound pulses ("scratching" noises) which are generated by these contractions. We have subjected individual and grouped larvae to external sound pulses and were able to demonstrate: (a) enhancement of rhythmic activity; (b) phase resetting; (c) entrainment to an external oscillator within a range of frequencies; (d) the existence of a subharmonic mode of entrainment. We propose a simple phenomenologic model to account for these larvae responses. Our model assumes the existence of an "energy" variable which declines with time but is upgraded, in a phase-dependent way, by external stimuli.

Original languageEnglish
Pages (from-to)661-679
Number of pages19
JournalBulletin of Mathematical Biology
Volume50
Issue number6
DOIs
StatePublished - Nov 1988

Fingerprint

Dive into the research topics of 'Rhythmic signalling and entrainment in Vespa orientalis larvae: Characterization of the underlying interactions'. Together they form a unique fingerprint.

Cite this