DOES SEXUAL SIZE DIMORPHISM VARY WITH LOG SEXUAL SIZE DIMORPHISM IN RED MILLIPEDES CENTROBOLUS COOK, 1897?

Author Name: Mark Ian Cooper

Volume/Issue: 02/12

Country: South Africa

DOI NO.: 08.2020-25662434 DOI Link: https://www.doi-ds.org/doilink/06.2022-83544225/UIJIR

Affiliation:

School of Animal, Plant & Environmental Sciences, University of the Witwatersrand, Johannesburg 2050, South Africa

ABSTRACT

This study aimed to determine what happened when Sexual Size Dimorphism (SSD) and log SSD were covaried. The log SSD was correlated with SSD in the forest millipede genus Centrobolus. There was a significant correlation between SSD and the log SSD (r=0.97, Z score=9.29, n=22, p=0). SSD was significantly different from log SSD (U=0, z score=-5.66864, n=22, 22, p<0.00001). Variance in the polygynandrous reproductive systems occurred when larger females and higher SSD covary with log SSD. There is no apparent reason to favor the log-transformed model over the non-transformed model.

Key words: Dimorphic; eco-geography; gradient; log; size; species