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26 results for “remating”
Figure 1 in Ability of Sterile Males to Inhibit Female Remating in the Oriental Fruit Fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae)
Figure 1. Numbers of rematings observed per cage for females first mated to fertile wild or sterile DTWP males at 3 intervals after the initial mating. Each cage held 10 test females. Symbols represent mean values + 1 SE; N = 8 in all cases.
Fig. 5 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 5. Fecundities of Bactrocera dorsalis females of various mating statuses. A. Lifetime mean number (± S.E.) of eggs laid per female, and B. Mean oviposition rates per week of Bactrocera dorsalis females of various mating statuses. G1, virgin females housed alone (n = 30); G2, females mated once (n = 26); G3, females mated twice with different virgin males (n = 32); G4, females mated with males that had mated on the previous day (n = 29); G5, females housed with males at a sex ratio of 1: 1 (n = 23); G6, females housed with males at a sex ratio of 1♀: 23 (n = 24). Different letters indicate significant differences.
Fig. 1 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 1. Male accessory glands of Bactrocera dorsalis. One pair of long tube mesodermal accessory glands (MAG) and 3 pairs of long, convoluted, complex and fragile ectodermal accessory glands (EAG).
Fig. 6 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 6. Fertilities of Bactrocera dorsalis females of various mating statuses. A. Lifetime mean percent hatch of eggs laid by females of G2 – G6 mating statuses, B. Mean percent hatch of eggs laid each week by females of G2 – G6 mating statuses. G2, females mated once (n = 18); G3, females mated twice with virgin males (n= 20); G4, females mated with non-virgin males (n = 18); G5, females housed with males with a sex ratio of 1: 1 (n = 18); G6, females housed with males with a sex ratio of 1♀: 23 (n = 19). Data for the unfertilized eggs laid by virgin females in group G1 and for females that produced fewer than 5 eggs in total were not analyzed. Different letters indicate significant differences.
Fig. 3 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 3. Mean percentage of successful matings among Bactrocera dorsalis of different mating statuses. M1, matings of 8-day old virgin females with of 8-day old virgin males on day 1; M2, matings of 9-day old virgin females with 9-day old virgin males on day 2; M3, matings of 10-day old virgin females with 10-day old males on day 3; M4, matings on day 2 of virgin females with males that had mated on day 1; M5, both first and second matings with virgin males; M6, first mating to non-virgin male and remating to virgin male. Different letters indicate significantly different proportions.
Fig. 1 in Timing of irradiation and male mating history effects on female remating in Anastrepha ludens (Diptera: Tephritidae)
Fig. 1. Interaction between age of pupal irradiation (24, 48, or 72 h before emergence) and male previous sexual experience (virgin, once mated, or twice mated) of the GSS strain of A. ludens (Tapachula-7) males on wild female likelihood to remate (N = 945).
Fig. 1 in Ability of sterile males to inhibit female remating in the melon fly Zeugodacus cucurbitae (Diptera: Tephritidae)
Fig. 1. Numbers of rematings observed per cage for females first mated to wild or sterile males at 3 intervals afer the initial mating. Each cage held 10 test females. Symbols represent mean values ± 1 SE; N = 8 in all cases.
Remate de Portada renacentista
La pieza pertenece a la Portada renacentista (1519-1521) de la Iglesia de Biar. Se trata de la escena de la Coronación de la Virgen por Dios Padre, Dios Hijo y Dios Espíritu Santo. Actualmente se encuentra en el interior del templo. RICHART PARRA, M. T. (2019): "Portada renaixentista de la façana de l'església parroquial de Nostra Senyora de l'Assumpció de Biar", en BORJA i SANZ, J. (coord.), Descobreix Art en Valor, Col·lectiva 22, Instituto Alicantino de Cultura Juan Gil-Albert, págs. 193-215, Alicante. Source: Objaverse 1.0 / Sketchfab
Data: Female-limited responses in remating rate and mating duration in the experimental evolution of a beetle Callosobruchus chinensis
<p><span>Mating rate optima often differ between the sexes: males may increase their fitness by multiple mating, but for females, multiple mating confers little benefit and can often be costly (especially in taxa without nuptial gifts or mala parental care). Sexually antagonistic evolution is thus expected in traits related to mating rates under sexual selection. This prediction has been tested by multiple studies that applied the experimental evolution technique, which is a powerful tool to directly examine the evolutionary consequences of selection. Yet, the results so far only partly support the prediction. Here we provide another example of experimental evolution of sexual selection, by applying it for the first time to the mating behavior of a seed beetle <em>Callsorobruchus</em> <em>chinensis</em>. We found a lower remating rate in polygamy-line females than in monogamy-line (i.e. no sexual selection) females after 21 generations of selection. Polygamy-line females also showed a longer duration of first mating than monogamy-line females. We found no effect of male evolutionary lines on the remating rate or first mating duration. Though not consistent with the original prediction, the current and previous studies collectively suggest that the observed female-limited responses may be a norm, which is also consistent with the conceptual advances in the last two decades of the advantages and limitations of the experimental evolution technique.</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: Female-limited responses in remating rate and mating duration in the experimental evolution of a beetle Callosobruchus chinensis
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Data from: Female loggerhead sea turtles (Caretta caretta L.) rarely remate during nesting season
The goal of this study was to assess the consequences of single versus multiple paternity by identifying paternity of clutches per female to identify if there were detectable costs or benefits. Multiple mating can occur when the benefits of mating outweigh the costs, but if costs and benefits are equal, no pattern is expected. Previous research on loggerhead sea turtle (Caretta caretta) populations found male-biased breeding sex ratios and multiple mating by many females nesting in southwestern Florida. A sample of nesting loggerhead females who laid more than one nest over the course of the season and a subset of their hatchlings were examined from 36 clutches in 2016 on Sanibel Island, Florida. Males that fathered hatchlings in the first clutch sampled were identified in subsequent clutches. Interestingly, 75% of the females analyzed had mated singly. No male was represented in more than one female's clutches. The results suggest that females likely mate at the beginning of the season and use stored sperm for multiple clutches. Evidence for mating between laying events was limited. There was no consistent pattern across the subsequent multiple paternity clutches, suggesting benefits to loggerhead females likely equal their costs and subsequent mating is likely determined by female preference.
Data from: Female remating decisions and a shorter inter-mating interval diminish last-male sperm precedence
Highly variable within and across species, patterns of sperm use not only are often driven by post-copulatory sexual selection but can also be impacted by experimental design. In investigations of paternity bias using competitive double matings, the inter-mating interval is a temporal factor that can affect sperm use patterns if the first male's sperm is used or lost at an appreciable rate between matings or if its viability or relative competitiveness is influenced by the time since ejaculation. Rapid loss of first-male sperm within the female after mating has been established in the seed beetle (Callosobruchus maculatus), a model system in sperm competition studies. However, our understanding of sperm precedence in this species, which disproportionately favors the last (second) male to mate, is based on long inter-mating intervals. Here, I determine the effect of a shortened inter-mating interval on second-male paternity (P2) and, importantly, the extent to which females in this species are willing to remate immediately. I find that P2 is significantly reduced when females remate immediately than when they remate 24 or 48 h after the first mating and that immediate remating is common, indicating that there is a substantial potential for female remating decisions to influence the intensity of sperm competition within species. To understand the variation in inter-mating intervals from a female perspective, I further identify key differences between females that did and did not remate at three inter-mating intervals (0, 24, and 48 h after the initial mating) and discuss potential mechanisms for the observed variation in female refractoriness.
Remating opportunities and low costs underlie maternal desertion
<p>Parental care can enhance offspring survival but may impose significant costs to parents. The costs and benefits of care are key to understanding patterns of parental care, where parents can benefit by having their partner increase investment in care, while reducing their own effort. However, investigating the costs and benefits of parental care in wild populations is challenging. Here we use highly detailed behavioural observations in families of a small shorebird, where one parent frequently deserts its offspring, to explore the potential costs and benefits of desertion in a wild population. We firstly show that females desert their broods more frequently than males. Secondly, we investigate the benefits of this frequent female desertion in terms of additional mating opportunities, and the costs of desertion to females in terms of the growth and survival of deserted offspring. Our results indicate that female desertion is favoured by a combination of remating benefits and a lack of costs to brood growth and survival, as abandoned male parents continue to provide care after desertion. Our results shed light on the costs and benefits underlying natural desertion strategies and suggest that female desertion is a fine-tuned behaviour that responds to seasonally changing benefits of desertion.</p>
Data from: Female remating decisions and a shorter inter-mating interval diminish last-male sperm precedence
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Remating opportunities and low costs underlie maternal desertion
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Data from: Female loggerhead sea turtles (Caretta caretta L.) rarely remate during nesting season
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Males adjust their manipulation of female remating in response to sperm competition risk
<p>To reduce the potential for sperm competition, male insects are thought to inhibit the post-mating reproductive behaviour of females through receptivity inhibiting compounds transferred in the ejaculate. Selection is expected to favour phenotypic plasticity in male post-copulatory expenditure, with males investing strategically in response to their perceived risk of sperm competition. However, the impact that socially cued strategic allocation might have on female post-mating behaviour has rarely been assessed. Here, we varied male perception of sperm competition risk, both prior to and during mating, to determine if a male's competitive environment impacts the extent to which he manipulates female remating behaviour. We found that female Australian field crickets<i> </i>(<i>Teleogryllus oceanicus</i>) mated to males that were reared under sperm competition risk emerged from a shelter in search of male song sooner than did females mated to males reared without risk, but only when mating occured in a risk free environment. We also found that females reared in a silent environment where potential mates were scarce displayed greater post-mating mate searching behaviour than females exposed to male calls during development. Collectively, our findings suggest complex interacting effects of male and female sociosexual environments on female post-mating sexual receptivity.</p>
Fig. 7 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 7. Lifetime mean numbers (± S.E.) of offspring produced by Bactrocera dorsalis females of various mating statuses. G2, females mated once (n = 18); G3, females mated twice with different virgin males (n = 20); G4, females mated with non-virgin males (n = 18); G5, females housed with males with a sex ratio of 1: 1 (n = 18); G6, females housed with males with a sex ratio of 1♀: 23 (n = 19). Data for the unfertilized eggs laid by virgin females in group G1 and for females that produced fewer than 30 eggs and/or five offspring in total were not analyzed. Different letters indicate significant differences.
Fig. 2 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 2. Size of male mesodermal accessory gland (MAG) of Bactrocera dorsalis. A, mean length (± S.E.), and B, mean area (± S.E.) of glands. UP means unmated males that were paired with virgin females before the onset of the simulated dusk (when mating occurs), and UU means unmated males and that were not paired with females. 0 h is the size of the MAG just afer mating; 16 h is the size of the MAG at 16 h. Different letters above error bars indicate significantly different means.
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