Substrate vibrations mediate behavioral responses via femoral chordotonal organs in a cerambycid beetle

Publication Type:Journal Article
Year of Publication:2016
Authors:Takanashi, Fukaya, Nakamuta, Skals, Nishino
Journal:Zoological Letters
Volume:2
Issue:1
Date Published:Jan-12-2016
Keywords:Behavior, Coleoptera, Sense organ, vibration
Abstract:

Background
Vibrational senses are vital for plant-dwelling animals because vibrations transmitted through plants allow them to detect approaching predators or conspecifics. Little is known, however, about how coleopteran insects detect vibrations.

Results
We investigated vibrational responses of the Japanese pine sawyer beetle, Monochamus alternatus, and its putative sense organs. This beetle showed startle responses, stridulation, freezing, and walking in response to vibrations below 1 kHz, indicating that they are able to detect low-frequency vibrations. For the first time in a coleopteran species, we have identified the sense organ involved in the freezing behavior. The femoral chordotonal organ (FCO), located in the mid-femur, contained 60–70 sensory neurons and was distally attached to the proximal tibia via a cuticular apodeme. Beetles with operated FCOs did not freeze in response to low-frequency vibrations during walking, whereas intact beetles did. These results indicate that the FCO is responsible for detecting low-frequency vibrations and mediating the behavioral responses. We discuss the behavioral significance of vibrational responses and physiological functions of FCOs in M. alternatus.

Conclusions
Our findings revealed that substrate vibrations mediate behavioral responses via femoral chordotonal organs in M. alternatus.

URL:http://zoologicalletters.biomedcentral.com/articles/10.1186/s40851-016-0053-4
DOI:10.1186/s40851-016-0053-4
Short Title:Zoological Lett
BioAcoustica ID: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith