Sperm dumping in Centrobolus inscriptus Attems (Spirobolida: Trigoniulidae)

Abstract

Differential ejaculate usage was tested in the diplopod Centrobolus inscriptus. Copulation duration, post-mating interval, and ejaculate volume (disintegrations per minute of H3+) were analysed for single and double mating sequences. During the 24h post-mating, ejaculate volumes decline was identified. The significant drop in ejaculate volumes (dpm) post-mating (Z = 3.00, n = 6, 7, P = 0.003) indicates a female process thought to be sperm dumping.