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11 results for “traumatic mating”
Data for: Traumatic mating causes strict monandry in a wolf spider
<p><span>In nature, most animal species are polygamous, and strict female monandry is rare. Though traumatic mating has been reported to postpone female re-mating, it rarely leads to strict female monandry. We demonstrate that traumatic mating causes strict female monandry in a wandering wolf spider <i>Pardosa pseudoannulata</i>. We showed direct evidence that male damaged the inner walls of the female genital tracts with the sharp embolus on its pedipalps during insemination. To confirm that the trauma reduced female's willingness to re-mate, we mimicked male pedipalp insertions by micro-injecting seminal fluids and/or causing trauma to female genital tracts and let them mate after the manipulations. Result of mating trials showed that seminal fluids have little impact to restrain female's mating willingness. However, once female genital tracts were wounded, its mating willingness would be greatly suppressed. In addition, impermeable amorphous mating plugs appeared in female genital tracts after mating. The mating plugs blocked female's genital tracts and completely prevented female from re-mating. We found that the components of mating plugs shared highly similar organic compounds and concentration percentage of free amino acids with female haemolymph, indicating that wounds caused by male traumatic mating lead to haemorrhages, which gradually turn into mating plugs. We thus provide evidence for strict female monandry being caused by male traumatic mating through two means together: genital trauma suppressed female's re-mating willingness and haemorrhage from the wounds formed impermeable mating plugs that completely prevented female from re-mating. </span></p>
Traumatic mating increases anchorage of mating male and reduces female remating duration and fecundity in a scorpionfly species
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Data for: Traumatic mating causes strict monandry in a wolf spider
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Traumatic mating in a wolf spider
<p><span>Strict monandry is rare in animals in nature. Though traumatic mating has been reported to </span><span>postpone female re-mating</span><span>, it rarely leads to strict monandry. We demonstrate that traumatic mating causes strict monandry in a wandering wolf spider, <em>Pardosa pseudoannulata</em>. We show direct evidence that males damaged the inner walls of female genital tracts with the sharp embolus on their palps during insemination. To confirm that the trauma reduced female willingness to re-mate, we mimicked male palp insertions by micro-injecting seminal fluids and/or causing trauma to female genital tracts, then we let the manipulated females mate. Result of mating trials showed that seminal fluids indeed have, but not significant impact in inhibiting female mating. However, once female genital tracts were wounded, female's mating willingness were greatly suppressed. In addition, we found that wounds caused by male traumatic matings lead to hemorrhages, which gradually turn into impermeable amorphous mating plugs. The mating plugs gradually blocked female genital tracts, and finally completely preventing females from re-mating. We thus provide evidence for strict monandry in P. pseudoannulata due to male traumatic mating through two means: genital trauma suppressed female's re-mating willingness and mating plugs completely prevented females from re-mating.</span></p>
Traumatic mating in a wolf spider
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Figures 6-8 from: Matsumura Y, Suenaga H, Kamimura Y, Gorb SN (2017) Traumatic mating by hand saw-like spines on the internal sac in Pyrrhalta maculicollis (Coleoptera, Chrysomelidae, Galerucinae). In: Chaboo CS, Schmitt M (Eds) Research on Chrysomelidae 7. ZooKeys 720: 77-89. https://doi.org/10.3897/zookeys.720.13015
Figures 6-8 - The internal sac membrane and spines of Pyrrhalta maculicollis. 6, 7 the sample was cut laterally, opened, dehydrated, and dried at the critical point 8 the sample dried at room temperature. The surfaces of the spines is slightly shrunken in comparison to that depicted in 7. Abbreviations: mp, membranous projections; s, spines; each is highlighted with blue and pink, respectively.
Figures 17-25 from: Matsumura Y, Suenaga H, Kamimura Y, Gorb SN (2017) Traumatic mating by hand saw-like spines on the internal sac in Pyrrhalta maculicollis (Coleoptera, Chrysomelidae, Galerucinae). In: Chaboo CS, Schmitt M (Eds) Research on Chrysomelidae 7. ZooKeys 720: 77-89. https://doi.org/10.3897/zookeys.720.13015
Figures 17-25 - Female reproductive systems: 17–19 Pyrrhalta maculicollis 20–22 P. tibialis 23 P. humeralis 24–25 Tricholochmaea semifulva species complex. 18, 21, 23, 25 show the cross sections of the lower part of the vagina, where wounds were found in P. maculicollis; each cuticular, epidermal, and muscular layer are partly highlighted in the upper right corner. 19, 22 show enlarged parts of the cuticular, epidermal, and muscular layers; these samples were embedded in glycerine for two days before taking the images. Arrowheads in 22 point to the strip stained with toluidine blue. Abbreviations: c, cuticle; e, epidermis; m, muscles; sc, spermathecal capsule.
Figures 1-5 from: Matsumura Y, Suenaga H, Kamimura Y, Gorb SN (2017) Traumatic mating by hand saw-like spines on the internal sac in Pyrrhalta maculicollis (Coleoptera, Chrysomelidae, Galerucinae). In: Chaboo CS, Schmitt M (Eds) Research on Chrysomelidae 7. ZooKeys 720: 77-89. https://doi.org/10.3897/zookeys.720.13015
Figures 1-5 - Aedeagus of Pyrrhalta maculicollis in the lateral view 1 relative size of the aedeagus compared to body size 2 the aedeagus and a part of the ejaculatory duct, muscles completely macerated. Two arrows point to the membranous areas of the median lobe 3 a micro CT scanned and segmented aedeagus and a part of the ejaculatory duct. The green structure represents the part of the ejaculatory duct with well–developed circular muscles, the yellow one represents the median lobe, and the red ones represent spines on the internal sac 4 the internal sac at rest with a part of the ejaculatory duct (ed) 5 schemes of the aedeagus at rest (left) and with partly evaginated internal sac during copulation (right). Abbreviations: aed, aedeagus; ed, ejaculatory duct; is, internal sac; ml, median lobe.
Figures 13-16 from: Matsumura Y, Suenaga H, Kamimura Y, Gorb SN (2017) Traumatic mating by hand saw-like spines on the internal sac in Pyrrhalta maculicollis (Coleoptera, Chrysomelidae, Galerucinae). In: Chaboo CS, Schmitt M (Eds) Research on Chrysomelidae 7. ZooKeys 720: 77-89. https://doi.org/10.3897/zookeys.720.13015
Figures 13-16 - Schemes of hypothetical couplings between male and female genitalia, light microscopy (LM) and scanning electron microscopy (SEM) images of the male internal sac 13 Pyrrhalta maculicollis 14 P. tibialis 15 P. humeralis 16 Tricholochmaea semifulva species complex. The schemes were created using information on morphology and dimensions of both male and female genitalia, but the genital coupling has not been experimentally proven. The meshed areas in the male internal sacs show areas covered by tiny projections, as shown in the SEM images. All samples were dried at room temperature. Abbreviations: is, internal sac; mp, membranous projection; s, sclerite; sc, spermathecal capsule; sd, spermathecal duct; v, vagina.
Figures 9-12 from: Matsumura Y, Suenaga H, Kamimura Y, Gorb SN (2017) Traumatic mating by hand saw-like spines on the internal sac in Pyrrhalta maculicollis (Coleoptera, Chrysomelidae, Galerucinae). In: Chaboo CS, Schmitt M (Eds) Research on Chrysomelidae 7. ZooKeys 720: 77-89. https://doi.org/10.3897/zookeys.720.13015
Figures 9-12 - Wounds observed on the vagina of Pyrrhalta maculicollis 9 schemes of three female vaginas, which had largest numbers of wounds, are shown. Each symbol represents one individual 10 one representative with four wounds 11, 12 enlarged images of the wounds. Abbreviations: sc: spermathecal capsule.
Data from: X-ray micro-CT scanning reveals temporal separation of male harm and female kicking during traumatic mating in seed beetles
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