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117 results for “Copulation”
Fig. 1 in An instance of intergeneric copulation in the family Rhopalidae (Heteroptera): structure, functioning and congruence of the genitalia in two different species from the standpoint of the lock-and-key hypothesis
Fig. 1. Copulation of Corizus hyoscyami (male) and Rhopalus parumpunctatus (female), Novgorod Province. Photograph by E.Yu. Kirtsideli.
Fig. 12 in An instance of intergeneric copulation in the family Rhopalidae (Heteroptera): structure, functioning and congruence of the genitalia in two different species from the standpoint of the lock-and-key hypothesis
Fig. 12. Female internal ectodermal genitalia in Corizus hyoscyami. b.g.c, basal part of gynatrial cone; a.g.c, apical part of gynatrial cone; l.p.g, lateral pouches of gynatrial sac. The basal part of gynatrial cone is shown in more or less dorso-ventral plane. Scale bar: 0.14 mm.
Fig. 6 in An instance of intergeneric copulation in the family Rhopalidae (Heteroptera): structure, functioning and congruence of the genitalia in two different species from the standpoint of the lock-and-key hypothesis
Fig. 6. Completely inflated aedeagus of Rhopalus parumpunctatus. Dry preparation in dorsal view. Scale bar: 0.14 mm
Figs 10, 11 in An instance of intergeneric copulation in the family Rhopalidae (Heteroptera): structure, functioning and congruence of the genitalia in two different species from the standpoint of the lock-and-key hypothesis
Figs 10, 11. Female terminalia in Rhopalus parumpunctatus. 10, external terminalia, ventral view; 11, internal ectodermal genitalia, dorsal view. b.g.c, basal part of gynatrial cone; a.g.c, apical part of gynatrial cone; gon, gonangulum; gp.I, gonapophysis I; f.d.w, fold on dorsal wall of basal part of gynatrial cone; gp.II, gonapophysis II; gx.VIII, gonocoxite VIII; gx.IX, gonocoxite IX; l.p.g, lateral pouches of gynatrial sac; lt.VIII, laterotergite VIII; lt.IX, laterotergite IX; prg, proctiger; sp.d, spermathecal duct. At fig. 10, the genital plates are shown somewhat driven apart and the inner margins of laterotergites IX are shown slightly turned ventrally; at fig. 11, the basal part of gynatrial cone is shown in more or less dorso-ventral plane. Scale bar: 0.14 mm.
Figs 4, 5 in An instance of intergeneric copulation in the family Rhopalidae (Heteroptera): structure, functioning and congruence of the genitalia in two different species from the standpoint of the lock-and-key hypothesis
Figs 4, 5. Aedeagus of Rhopalus parumpunctatus in intermediate stages of inflation.4, earlier stage of inflation; 5, somewhat later stage of inflation. Wet preparations in dorsal view. b.p.v., basal part of vesica; h.bd, hyaline band. Scale bar: 0.14 mm.
Figs 2, 3 in An instance of intergeneric copulation in the family Rhopalidae (Heteroptera): structure, functioning and congruence of the genitalia in two different species from the standpoint of the lock-and-key hypothesis
Figs 2, 3. Aedeagus of Rhopalus parumpunctatus. 2, at rest; 3, at very beginning of inflation. Wet preparations in dorsal view. a.p.v, apical part of vesica; ar.s, articular sclerite; d-l.l, dorso-lateral lobes of conjunctiva; ej.r, ejaculatory reservoir; l.l.v, left lobe of basal part of vesica; r.l.v, right lobe of basal part of vesica; s.gp, secondary gonopore. Scale bar: 0.14 mm.
Figures 7-12 in Couples in phoretic copulation, a tool for male-female association in highly dimorphic insects of the wasp genus Dissomphalus Ashmead (Hymenoptera: Bethylidae)
Figures 7-12. (7-9) Female of Dissomphalus firmus from Panama: (7) habitus in lateral view; (8) head in dorsal view; (9) mesosoma in dorsal view. (10-12) Female of Dissomphalus rettenmeyeri from Panama: (10) habitus in lateral view; (11) head in dorsal view; (12) mesosoma in dorsal view. Scale bars: 100 µm.
Copulation interruption decreases female reproductive success in a false widow spider
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Extra-pair copulations can insure female blue tits against male infertility
Mating outside the pair-bond occurs frequently in socially monogamous birds, but the benefits that females gain from this behaviour remain debated. One hypothesis is that females engage in extra-pair copulations (EPCs) to ensure that their clutch is fertilised in case their own mate is infertile, but evidence for this idea is scarce. We report on a case of an infertile male blue tit that bred in three successive years with three different females. In the first year, all eggs were sired by an extra-pair male whereas in the second year all eggs were unfertilised and contained no sperm. In the third year, the female produced two clutches that were fertilised by an extra-pair male, but - unlike 'normal' clutches - sperm numbers on the perivitelline membrane decreased rapidly over the laying sequence. Our findings show that blue tit females mated to an infertile male can escape reproductive failure by engaging in EPCs and support previous suggestions that EPCs in blue tits cease after the onset of egg laying.
Male genital lobe morphology affects the chance to copulate in Drosophila pachea
Abstract Introduction Male genitalia are thought to ensure transfer of sperm through direct physical contact with female during copulation. However, little attention has been given to their pre-copulatory role with respect to sexual selection and sexual conflict. Males of the fruitfly Drosophila pachea have a pair of asymmetric external genital lobes, which are primary sexual structures and stabilize the copulatory complex of female and male genitalia. We wondered if genital lobes in D. pachea may have a role before or at the onset of copulation, before genitalia contacts are made. Results We tested this hypothesis with a D. pachea stock where males have variable lobe lengths. In 92 mate competition trials with a single female and two males, females preferentially engaged into a first copulation with males that had a longer left lobe and that displayed increased courtship vigor. In 53 additional trials with both males having partially amputated left lobes of different lengths, we observed a weaker and non-significant effect of left lobe length on copulation success. Courtship durations significantly increased with female age and when two males courted the female simultaneously, compared to trials with only one courting male. In addition, lobe length did not affect sperm transfer once copulation was established. Conclusion Left lobe length affects the chance of a male to engage into copulation. The morphology of this primary sexual trait may affect reproductive success by mediating courtship signals or by facilitating the establishment of genital contacts at the onset of copulation.
Video S1. Possible copulation attempt
<p><strong>Video S1. </strong>Possible copulation attempt. The male is at the nest; the female arrives carrying moss. The male mounts the female, who drops the moss, and he attempts to hold her by feathers of her right carpus. The both fly out of the camera frame (7 June 2021, 04:54:28 hr).</p>
Figure 1 in Report of an extra-pair copulation in the Rufous Hornero, Furnarius rufus (Aves: Furnariidae)
Figure 1. Chronology of records of within-pair and extra-pair copulations involving two pairs of Rufous Horneros that inhabited adjacent territories. (A) WPC between members of the Territorial Pair; (B) Territorial Pair foraging outside its territory; (C) The male neighbor chases the territorial male away from its territory; (D) The male neighbor copulates with the territorial female (i.e., EPC). The yellow line indicates the border separating the Territorial Pair (red) and the Neighbor Pair (blue). Image source: Google Earth.
Fig. 1. A in A few notes on the diet and the copulation of Theba pisana (Müller, 1774) snails: observations on terrarium kept animals
Fig. 1. A pair of copulating Theba pisana hanging from the glass cover of the terrarium.
Data from: ultimate drivers of forced extra-pair copulations in birds lacking penises: jackdaws as a case-study
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Male genital lobe morphology affects the chance to copulate in Drosophila pachea
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Data from: Genetic Monogamy despite frequent extra-pair Copulations in “strictly monogamous” wild Jackdaws
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Extra-pair copulations can insure female blue tits against male infertility
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The function of prolonged copulations in monandrous Enchenopa treehoppers (Hemiptera: Membracidae)
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FIGURE 2 in Description of female genitalia, additional morphological variations, and courtship behavior and copulation of Macrostemum brasiliense (Fischer 1970) (Trichoptera Hydropsychidae)
FIGURE 2. Macrostemum brasiliense (Fischer 1970), female genitalia. 2A, left lateral; 2B, with phallus in copula, ventral; 2C, vaginal apparatus, ventral; 2D, vaginal apparatus with phallus in copula, left lateral; 2E, ventral.
FIGURE 1 in Description of female genitalia, additional morphological variations, and courtship behavior and copulation of Macrostemum brasiliense (Fischer 1970) (Trichoptera Hydropsychidae)
FIGURE 1. Macrostemum brasiliense (Fischer 1970), aspects of natural history. 1A, occurrence records; 1B, 1C, habitat; 1D, in copula.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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