A Reproductives Excluder for Subterranean Termites in Laboratory Experiments

Area of Science:

• Entomology
• Social Insect Behavior
• Termite Biology

Background:

• Termite colonies exhibit complex social structures with distinct castes and labor division.
• Studying subterranean termites (Coptotermes formosanus) is challenging due to their cryptic nature and large colony size.
• Current laboratory methods using planar arenas lack ways to isolate reproductives, hindering research on royal chambers and central nests.

Purpose of the Study:

• To determine the minimum passing size for different castes of Coptotermes formosanus.
• To develop a functional reproductive excluder for laboratory experiments.
• To correlate minimum passing size with caste-specific head dimensions.

Main Methods:

• Measured the minimum gap size passable by workers and soldiers of Coptotermes formosanus.
• Correlated passing size with head width and head height measurements for each caste.
• Tested the efficacy of developed reproductive excluders with incipient colonies of C. formosanus.

Main Results:

• Workers and soldiers of C. formosanus can pass through gaps >= 0.7 mm.
• Significant differences in head width and height exist between castes.
• Head height is a more critical determinant of passing size than head width.

Conclusions:

• The study successfully identified critical dimensions for designing reproductive excluders for C. formosanus.
• Reproductive excluders enable independent study of termite royal chambers and central nests in laboratory settings.
• This advancement facilitates deeper research into the social behavior and colony organization of termites.