Fire millipedes obey the female sooner norm in cross mating Centrobolus (Myriapoda)
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Copulation duration and ejaculate volume recorded in cross mating Centrobolus suggests size-assortative mating without a size based preference in these mate-guarding millipedes.Abstract:
Sexual mediation of copulation duration is reviewed in arthropods. Copulation duration and ejaculate volume were recorded in cross mating Centrobolus to test species' mediation differences. Conspecific C. inscriptus copulation durations were long (170.0 ± 49.3 min, n = 46), C. annulatus copulation durations were short (39.4 ± 18.6 min, n = 8), while mating between heterospecifics (C. inscriptus X C. annulatus) had the shortest copulation durations (12.4 ± 10.6 min, n = 6); when re-mating interval, sexual size dimorphism, sex ratio and ejaculate volume were controlled. âo (the female sooner norm) suggests size-assortative mating without a size based preference in these mate-guarding millipedes.read more
Citations
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Sexual conflict over the duration of copulation in Centrobolus inscriptus (Attems)
TL;DR: In this paper, the authors found evidence of a conflict of interests over control of copulation duration in Centrobolus inscriptus and found that female girth was positively correlated with the second copulation length.
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A review of studies on the fire millipede genus centrobolus (diplopoda: trigoniulidae)
TL;DR: Studies on Centrobolus spp.
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Allometry for sexual dimorphism in millipedes (Diplopoda)
TL;DR: Rensch’s rule predict the negative associations between sexual size dimorphism (SSD) and body sizes for relatively larger females and this prediction was tested for forest and savanna diplopods using a geometric morphometric approach using calculations of length and width to derive shape volume.
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Latitudinal-size trend in eight species of Centrobolus
TL;DR: Bergmann's eco-geographical rule maintained within a taxonomic clade was found in colder environments, and species of smaller size were found in warmer regions as mentioned in this paper, which was tested in the millipede genus Centrobolus with reversed sexual size dimorphism (SSD).
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Sexual size dimorphism and the rejection of Rensch’s rule in Diplopoda (Arthropoda)
TL;DR: Rensch’s rule predict the negative associations between sexual size dimorphism (SSD) and body sizes for relatively larger females and this prediction was tested for forest and savanna diplopods using a geometric morphometric approach using calculations of length and width to derive shape volume.
References
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Variable mate-guarding time and sperm allocation by male snow crabs (Chionoecetes opilio) in response to sexual competition, and their impact on the mating success of females
TL;DR: Sperm economy is predicted by sperm competition theory for species like snow crab in which polyandry exists, mechanisms of last-male sperm precedence are effective, and the probability that one male fertilizes a female’s lifetime production of eggs is small.
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Directional selection for duration of copulation in Drosophila melanogaster.
Ian T. MacBean,Peter A. Parsons +1 more
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Sexual conflict over the duration of copulation in Drosophila montana: why is longer better?
Dominique Mazzi,Dominique Mazzi,Jenni Kesäniemi,Anneli Hoikkala,Kirsten Klappert,Kirsten Klappert +5 more
TL;DR: It is shown that females make a substantial contribution towards shortening copulations, and evidence that copulation duration is a form of male reproductive investment that responds to the perceived intensity of sperm competition as predicted by game theoretical models is provided.
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Complex copulatory behavior and the proximate effect of genital and body size differences on mechanical reproductive isolation in the millipede genus Parafontaria.
Tsutomu Tanabe,Teiji Sota +1 more
TL;DR: Mechanical isolation between these sympatric species of Parafontaria resulted from morphological differentiation mediated by the obligatory preliminary intromission, demonstrating the proximate importance of genital and body size differences for reproductive isolation within this genus of millipede.