Sexual Size Dimorphism (SSD) was reversed in Diplopoda, as it was in the majority of invertebrates. The goal was to examine SSD in the Sphaerotherium genus. Male and female morphological data for S. cinctellum, S. commune, S. compressum, S. punculatum, S. spinatum, S. tenuitarse, and S. tuberosum were gathered from the literature, including male and female width, volume, and SSD. The five morphological variables were regressed against latitude, precipitation, and temperature using linear regressions. SSD was substantially associated to the mating system, seasonality, and oviposition (r=0.76, Z score=1.97, n=7, p=0.02) and was strongly correlated with precipitation (r=0.76, Z score=1.97, n=7, p=0.02). Female breadth was associated to temperature (r=0.75, Z score=1.93, n=7, p=0.03) and fecundity selection (r=0.75, Z score=1.93, n=7, p=0.03). Temperature was only moderately associated to SSD (r=0.61, Z score=1.42, n=7, p=0.08).
Author(s) Details:
Mark Cooper,
School of Animal, Plant & Environmental Sciences University of the
Witwatersrand, Johannesburg 2050, South Africa.
Please see the link here: https://stm.bookpi.org/NVBS-V9/article/view/5872
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