The affect of female body width on copulation duration in Centrobolus inscriptus (Attems)

Cooper, Mark Ian

doi:10.22271/j.ento.2017.v5.i1j.10

Cited by 8 publications

(11 citation statements)

References 4 publications

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“…However, our results gave no support to the rest upon literature evidence of positive correlations between fecundity and body mass in millipedes (Heath et al, 1974), Orthoptera (Sturm, 2016) and in oviparous species of several insect orders (Honěk, 1993). Larger females with thicker abdomens (Yang and Wang, 2004), greater body length (Lu et al, 2013), and body width (Cooper, 2017) were more attractive to males in different species. This could result not only from possessing a greater number of eggs, but also from being capable of receiving a larger volume of ejaculate (Lu et al, 2013;Cooper, 2017).…”

Section: Analyses Of Morphological Traits In M Bosniensecontrasting

confidence: 97%

Sexual behaviour and morphological variation in the millipede Megaphyllum bosniense (Verhoeff, 1897)

Vujić

Ilić

Jovanović

et al. 2018

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Sexual selection can be a major driving force that favours morphological evolution at the intraspecific level. According to the sexual selection theory, morphological variation may accompany non-random mating or fertilization. Here both variation of linear measurements and variation in the shape of certain structures can significantly influence mate choice in different organisms. In the present work, we quantified sexual behaviour of the millipede Megaphyllum bosniense (Verhoeff, 1897) as characterized by several sequences. These are: mating latency, duration of copulation, contact to copulation time, duration of contact without copulation, time from entrance (time-point when individuals were placed in boxes in which tests occurred) to contact with copulation, and time from entrance to contact without copulation. Further, we analysed the influence of morphological variation (both variation of linear measurements and variation in the shape of several structures) on mating success. Variation of body length, antennal length, length of the walking legs, trunk width, and trunk height was analysed by traditional morphometrics, while variation in size and shape of the antennae, walking legs, head, and gonopods (promeres, opisthomeres) was analysed using geometric morphometrics. More than half of all physical contacts detected among the millipedes resulted in copulation. Based on the value of sexual selection coefficients, preferences toward the previous partner were found to be prevalent in both female and male choice tests. Individuals with different mating status significantly differed in some morphological traits (body mass, head centroid size, head shape, and promere shape). Our study yielded new information about the sexual behaviour of millipedes and variation of morphological traits as a potential basis for mate preferences.

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Section: Analyses Of Morphological Traits In M Bosniensecontrasting

confidence: 97%

Sexual behaviour and morphological variation in the millipede Megaphyllum bosniense (Verhoeff, 1897)

Vujić

Ilić

Jovanović

et al. 2018

CTOZ

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“…It supports male control of the copulation duration in Spirostreptidae [9] . The appearance of larger females copulating for longer in Trigoniulidae is related to male size [6,7] .…”

Section: Discussionmentioning

confidence: 99%

“…Millipede copulation is usually prolonged and differs between species and between populations [4] . In some millipedes, males and female mass correlates with copulation duration [6,7] . No trend has been demonstrated in juliform millipedes.…”

Section: Introductionmentioning

confidence: 99%

Allometry of copulation in worm-like millipedes

Cooper¹

2017

J. Entomol. Zool. Stud.

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The prediction that copulation duration is longer when body mass increases was tested in juliform millipedes at the population-level by tabulating and correlating body mass (0.6-8.5g; n=1167) with copulation duration (34-206 min; n=391) in 8 southern African taxa: ord. Spirostreptida fam. Odontopygidae gen. Odontopyge (n=2spp.), Spinotarsus (n=1sp.) and fam. Spirostreptidae gen. Calostreptus (n=1sp.), Doratogonus (n=1sp.); and ord. Spirobolida fam. Trigoniulidae gen. Centrobolus (n=3spp.) collected in 1989 (Zimbabwe) and 1996 (South Africa). Copulation duration and body mass were positively correlated across populations (r=-0.7626, N=11, P=0.006347) and species (r=0.632; N=8; P=0.092734). This study contributes to the allometry of copulation.

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“…Diplopoda resemble the majority of invertebrates where SSD is reversed [12] . SSD has consequences for outcomes of sexual encounters in diplopod mating [13][14][15][16][17][18][19] . The allometry of SSD involves the detection of a relationship between body size and SSD and is known by Rensch's rule [20.…”

Section: Introductionmentioning

confidence: 99%

Allometry for sexual dimorphism in millipedes (Diplopoda)

Cooper¹

2018

J. Entomol. Zool. Stud.

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Rensch's rule predict the negative associations between sexual size dimorphism (SSD) and body sizes for relatively larger females. This prediction was tested for forest and savanna diplopods using a geometric morphometric approach using calculations of length and width to derive shape volume based on the mathematical formulae for estimated cylindrical worm-like millipede size (l.π.r 2 ) and spherical pill millipede size (4/3.π.r 3 ): (i) Centrobolus (were collected in February 1996, South Africa) SSD was 0.63-2.89 (1.52±0.35; 267) (ii) Sphaerotherium (extracted from literature) SSD was 1.49-5.36 (2.96±1.40; n≥7); (iii) savanna (Calostreptus, Doratogonus, Odontopyge and Spinotarsus were collected in February 1989, Zimbabwe) and forest helminthomorphs (collected in February 1996, South Africa) SSD was 0.88-1.62 (1.26±0.23; 1233). Interspecific variation regressed was SSD (0.63-5.36) on body sizes (n=1273) with no significant negative correlations rejecting Rensch's rule. Eco-morphological patterns were discussed.

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The affect of female body width on copulation duration in Centrobolus inscriptus (Attems)

Cited by 8 publications

References 4 publications

Sexual behaviour and morphological variation in the millipede Megaphyllum bosniense (Verhoeff, 1897)

Sexual behaviour and morphological variation in the millipede Megaphyllum bosniense (Verhoeff, 1897)

Allometry of copulation in worm-like millipedes

Allometry for sexual dimorphism in millipedes (Diplopoda)

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