Converse of Rensch's Rule is not Necessarily True in Millipedes

Cooper M

doi:10.23880/izab-16000410

International Journal of Zoology and Animal Biology Research Article 1 min read

Converse of Rensch's Rule is not Necessarily True in Millipedes

Cooper M^*

^* Corresponding author

ISSN: 2639-216X 10.23880/izab-16000410 Received: October 03, 2022 Published: October 14, 2022

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Keywords

Dimorphism Rensch Rule Sexual Size

Abstract

Previous studies on Rensch's rule showed tests in the Diplopoda. These produced correct results of hypo-allometry however they were somewhat misinterpreted. The original corroboration of the rule appeared to be incorrect.

Introduction

Rensch's rule states that sexual size dimorphism (SSD) decreases with body size when females are larger [1]. This rule has implications for the outcome of mating events and has been tested in the Diplopoda with the correct interpretation of the results [2, 3, 4, 5, 6, 7, 8]. The correct interpretation of the rule for Diplopoda is indeed the converse which shows SSD increases with body size. The gradients (m) in the first two allometric equations (Centrobolus and Sphaerotherium) are positive [1, 6]. Covariates of SSD may include the allometry of gonopods and size-based post-insemination associations [2, 3, 7].

Conclusion

The converse of Rensch's rule is corroborated while the rule may probably be rejected here.

References

Cooper MI (2014) Sexual size dimorphism and corroboration of Rensch’s rule in Chersastus millipedes. J Entomol Zool Stud 2(6): 264-266.
Cooper MI (2016) Sexual conflict over the duration of copulation in Centrobolus inscriptus. J Entomol Zool Stud 4(6): 852-854.
Cooper M (2016) Post-insemination associations between males and females in Diplopoda: A remark on Alcock’s (1994) predictions of the mate-guarding hypothesis. J Entomol Zool Stud 4(2): 283-285.
Cooper MI (2017) Allometry of copulation in worm- like millipedes. J Entomol Zool Stud 5(3): 1720-1722.
Cooper M (2017) Re-assessment of Rensch’s rule in Centrobolus. J Entomol Zool Stud 5(6): 2408-2410.
Cooper MI (2018) Sexual size dimorphism and the rejection of Rensch’s rule in Diplopoda. J Entomol Zool Stud 6(1): 1582-1587.
Cooper MI (2018) Trigoniulid size dimorphism breaks Rensch. J Entomol Zool Stud 6(3): 1232-1234.
Cooper M (2018) Centrobolus size dimorphism breaks Rensch’s rule. Arthropods 7(3): 48-52.
Cooper M (2019) Julid and spirobolid millipede gonopods functional equivalents. J Entomol Zool Stud 7(4): 333-335.

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Converse of Rensch's Rule is not Necessarily True in Millipedes

Introduction

Conclusion

References

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