Complex alarm strategy in the most basal termite species

0453324 - ÚOCHB 2016 RIV DE eng J - Journal Article
Delattre, O. - Sillam-Dusses, D. - Jandák, V. - Brothánek, M. - Rücker, Karel - Bourguignon, T. - Vytisková, B. - Cvačka, Josef - Jiříček, O. - Šobotník, J.
Complex alarm strategy in the most basal termite species.
Behavioral Ecology and Sociobiology. Roč. 69, č. 12 (2015), s. 1945-1955. ISSN 0340-5443. E-ISSN 1432-0762
Institutional support: RVO:61388963
Keywords : defence * labial glands * vibroacoustic communication * chemical communication
Subject RIV: EH - Ecology, Behaviour
Impact factor: 2.382, year: 2015

Studying basal taxa often allows shedding a light on the evolution of advanced representatives. The most basal termite species, Mastotermes darwiniensis, possesses unique morphological and behavioural traits, of which many remain scarcely studied. For these reasons, we conducted a comprehensive study of the alarm communication in this species and compared its components to behavioural modes described in other termites. In M. darwiniensis, the alarm is communicated by substrate-borne vibrations resulting from vertical vibratory movements. Another similar behaviour consists in longitudinal movements, by which the alarm is delivered to other termites in contact with alerted individual. Both these two behavioural modes could be used in synergy to create complex movements. M. darwiniensis also uses chemical alarm signals produced by labial gland secretion, in contrast to Neoisoptera in which this function is fulfilled exclusively by the frontal gland secretion. Moreover, we demonstrated in M. darwiniensis the presence of a positive feedback mechanism thought to occur exclusively in the crown group Termitidae. This positive feedback consists in both oscillatory movements of alerted individuals in response to alarm signals and release of alarm pheromone by excited soldiers. Our results confirm that M. darwiniensis is a remarkable example of mosaic evolution, as it combines many primitive and advanced features, and its alarm communication clearly belongs to the latter category.
Permanent Link: http://hdl.handle.net/11104/0254147