| 要旨トップ | 目次 | 日本生態学会第71回全国大会 (2024年3月、横浜) 講演要旨
ESJ71 Abstract


一般講演(口頭発表) C03-04  (Oral presentation)

Comparative study of termites movement: do workers and soldiers shows different pattern?【EPA】【S】

*Akiya SATOH(Tokyo Metropolitan Univ.), Kensei KIKUCHI(OIST), Nobuaki MIZUMOTO(OIST)

The defensive behavior of termites against enemies significantly impacts the viability of their populations. The soldier caste primarily engages in colony defense, and soldier’s defensive strategies vary widely among species. For example, some species use chemical defense by secreting toxic chemicals against enemies, while some species use phragmotic defense, where soldiers plug the entrance to the nest with their large heads, to prevent the intrusion of enemies. These defense strategies could influence the activity level of the soldier caste; chemically defending soldiers must move quickly to attack external enemies, while phragmotic soldiers remain motionless to seal their nests. Although many studies revealed a relationship between defense strategies and morphological differences among soldiers, the relationship between locomotive patterns and defensive strategies remains unclear. In this study, we examined how locomotive patterns vary across castes and species with different defense strategies in termites. We found that when termites were alone in an arena, there were no significant differences in movement distance or speed between castes, regardless of the species or difference in defense strategy. When comparing soldier movement across species, there were no significant differences in locomotive patterns between species except for Cryptotermes domesticus, which has a typical phragmotic soldier. These results indicate that termites' defensive strategies and task allocation may not drive differences in innate movement patterns when isolated. Future comparisons of worker and soldier behavior patterns at the group level and within nests could help to clarify if these patterns persist in a group context, the evolutionary process leading to the development of different defense strategies, and how individual differences occur in a social context.


日本生態学会