As a kind of syn-copula mate-guarding, Centrobolus usually has protracted copulation. In four species of the millipede genus Centrobolus, variations in copulation duration were calculated and examined. All four species had distinct mean copulation durations, however only two of them differed intra-specifically. Copulation duration coefficient of variation (CV) was different between C. inscriptus and C. anulatus (F=0.41490, d.f.=114, 7, p=0.04892), and copulation duration CV was different between C. fulgidus and C. anulatus (F=0.38912, d.f.=50, 7, p=0.04836). Copulation duration was vary within species, although it tended to be moderate and evolutionarily decisive (interspecifically). Male and female volumes were substantially linked (Spearman's Rho Calculator) with copulation duration (r=1, p=0, n=4, 4; 4, 4). Copulation length was shown to be strongly linked with size (volumes) when sex was accounted for (r=0.6655, r2=0.4429, p=0.004897, n=8, 8). Larger male and female physical sizes are linked to codependency.
Author(S) Details
Mark Cooper
School of Animal, Plant & Environmental Sciences, University of the Witwatersrand, Johannesburg 2050, South Africa
View Book:- https://stm.bookpi.org/NVBS-V8/article/view/5389
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