THE MOMENTS OF INERTIA TIE-UP WITH FEMALE SIZE, HOURS OF SUNSHINE THROUGHOUT THE YEAR, LATITUDE, LONGITUDE AND MINIMUM TEMPERATURE IN RED MILLIPEDES CENTROBOLUS COOK, 1897

Author Name: M. Ian Cooper

Volume/Issue: 03/02

Country: South Africa

DOI NO.: 08.2020-25662434 DOI Link: https://www.doi-ds.org/doilink/08.2022-76913842/UIJIR

Affiliation:

School of Animal, Plant & Environmental Sciences, University of the Witwatersrand, Johannesburg 2000, South Africa

ABSTRACT

Body size is a correlate of copulation duration in Centrobolus. I tested for the presence of relationships between latitude, longitude, female size, hours of sunshine throughout the year, and minimum temperature and moments of inertia in C. digrammus (n=6), C. fulgidus (n=11), C. inscriptus (n=88, 56+41), and C. ruber (n=18). Moments of inertia were related to hours of sunshine throughout the year (r=-0.67, Z score=-2.15, n=10, p=0.02). Male moments of inertia were not related to hours of sunshine throughout the year (r=-0.68, Z score=-1.19, n=5, p=0.12). Female moments of inertia were related to hours of sunshine throughout the year (r=-0.83, Z score=-1.67, n=5, p<0.05). Moments of inertia were related to female size (r=0.78, Z score=2.77, n=10, p<0.01). Male moments of inertia were related to female size (r=0.84, Z score=1.72, n=5, p=0.04). Female moments of inertia were related to female size (r=0.93, Z score=2.33, n=5, p<0.01). Moments of inertia were related to latitude (r=0.55, Z score=1.64, n=10, p=0.050). Male moments of inertia were not related to latitude (r=0.55, Z score=0.86, n=5, p=0.19). Female moments of inertia were not related to latitude (r=0.69, Z score=1.21, n=5, p=0.11). Moments of inertia were related to longitude (r=0.64, Z score=2.00, n=10, p=0.02). Male moments of inertia were not related to longitude (r=0.641, Z score=1.08, n=5, p=0.14). Female moments of inertia were marginally related to longitude (r=0.80, Z score=1.54, n=5, p=0.06). Moments of inertia were related to minimum temperature (r=0.58, Z score=1.74, n=10, p=0.04). Male moments of inertia were not related to minimum temeprature (r=0.56, Z score=0.89, n=5, p=0.19). Female moments of inertia were marginally related to minimum temperature (r=0.77, Z score=1.33, n=5, p=0.09).

Key words: Interia, Sunshine, Latitude, Longitude, Millipedies