Last male sperm precedence is modulated by female remating rate in<i>Drosophila melanogaster</i>

Laturney, Meghan; Eijk, Roel van; Billeter, Jean‐Christophe

doi:10.1002/evl3.50

Cited by 36 publications

(54 citation statements)

References 60 publications

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“…Moreover, although LMSP is extensively documented for twice-mated females, LMSP is reduced when females mate with three or more males (Billeter, Jagadeesh, Stepek, Azanchi, & Levine, 2012). In thrice-mated females who remated sooner (i.e., those with reduced remating latencies), the effects of LMSP were even further reduced, though these effects were not found in twice-mated females (Laturney, Eijk, & Billeter, 2018 (Bachtrog et al, 2014;Beukeboom & Perrin, 2014), and instead one individual may exhibit both male and female functionality, that is, simultaneous or sequential hermaphrodites. Aside from pure gonochorism and pure hermaphroditism, hermaphrodites and males and/or females may coexist to form yet other reproductive systems such as gynodioecy (Bachtrog et al, 2014;Charlesworth & Charlesworth, 1978).…”

Section: Future Research On Irscmentioning

confidence: 96%

“…Moreover, although LMSP is extensively documented for twice‐mated females, LMSP is reduced when females mate with three or more males (Billeter, Jagadeesh, Stepek, Azanchi, & Levine, ). In thrice‐mated females who remated sooner (i.e., those with reduced remating latencies), the effects of LMSP were even further reduced, though these effects were not found in twice‐mated females (Laturney, Eijk, & Billeter, ). By altering their mating behavior, females may modulate the effects of LMSP, and therefore can have an active role in biasing the paternity among offspring instead of passively undergoing male manipulation.…”

Section: Interlocus Sexual Conflictmentioning

confidence: 99%

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Making sense of intralocus and interlocus sexual conflict

Schenkel

Pen

Beukeboom

et al. 2018

Ecology and Evolution

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Sexual conflict occurs because males and females are exposed to different selection pressures. This can affect many aspects of female and male biology, such as physiology, behavior, genetics, and even population ecology. Its broad impact has caused widespread interest in sexual conflict. However, a key aspect of sexual conflict is often confused; it comprises two distinct forms: intralocus and interlocus sexual conflict (IASC and IRSC). Although both are caused by sex differences in selection, they operate via different proximate and ultimate mechanisms. Intralocus sexual conflict and IRSC are often not clearly defined as separate processes in the scientific literature, which impedes a proper understanding of each form as well as of their relative impact on sexual conflict. Furthermore, our current knowledge of the genetics of these phenomena is severely limited. This prevents us from empirically testing numerous theories regarding the role of these two forms of sexual conflict in evolution. Here, we clarify the distinction between IASC and IRSC, by discussing how male and female interests differ, how and when sex‐specific adaptation occurs, and how this may lead to evolutionary change. We then describe a framework for their study, focusing on how future experiments may help identify the genetics underlying these phenomena. Through this, we hope to promote a more critical reflection on IASC and IRSC as well as underline the necessity of genetic and mechanistic studies of these two phenomena.

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Section: Future Research On Irscmentioning

confidence: 96%

Section: Interlocus Sexual Conflictmentioning

confidence: 99%

Making sense of intralocus and interlocus sexual conflict

Schenkel

Pen

Beukeboom

et al. 2018

Ecology and Evolution

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“…This effect is mainly mediated by products of the male accessory glands [10][11][12][13] . Despite this chemical mate guarding, females mate multiple times when in social groups and in the presence of food [14][15][16][17] . The outcome of sperm competition in multiply inseminated females depends on genotypes of all involved parties and female remating rate 11,12,[15][16][17] .…”

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confidence: 99%

Female copulation song is modulated by seminal fluid

2020

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In most animal species, males and females communicate during sexual behavior to negotiate reproductive investments. Pre-copulatory courtship may settle if copulation takes place, but often information exchange and decision-making continue beyond that point. Here, we show that female Drosophila sing by wing vibration in copula. This copulation song is distinct from male courtship song and requires neurons expressing the female sex determination factor DoublesexF. Copulation song depends on transfer of seminal fluid components of the male accessory gland. Hearing female copulation song increases the reproductive success of a male when he is challenged by competition, suggesting that auditory cues from the female modulate male ejaculate allocation. Our findings reveal an unexpected fine-tuning of reproductive decisions during a multimodal copulatory dialog. The discovery of a female-specific acoustic behavior sheds new light on Drosophila mating, sexual dimorphisms of neuronal circuits and the impact of seminal fluid molecules on nervous system and behavior.

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“…Previous work has shown that sperm competition outcome varies with female genotype [30,31] and can be subject to male×female genotype interactions [32,33]. Variation in SDP susceptibility represents a potential mechanism through which female genotype can influence sperm competition outcome and remove the last-male sperm competition advantage observed in Drosophila and many other insects [34]. To explore this, future work should seek to identify the genetic contributions to SDP formation.…”

Section: Discussionmentioning

confidence: 99%

Structural variation in Drosophila melanogaster spermathecal ducts and its association with sperm competition dynamics

2020

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The ability of female insects to retain and use sperm for days, months, or even years after mating requires specialized storage organs in the reproductive tract. In most orders, these organs include a pair of sclerotized capsules known as spermathecae. Here, we report that some Drosophila melanogaster females exhibit previously uncharacterized structures within the distal portion of the muscular duct that links a spermatheca to the uterus. We find that these ‘spermathecal duct presences' (SDPs) may form in either or both ducts and can extend from the duct into the sperm-storing capsule itself. We further find that the incidence of SDPs varies significantly between genotypes, but does not change significantly with the age or mating status of females, the latter indicating that SDPs are not composed of or stimulated by sperm or male seminal proteins. We show that SDPs affect neither the number of first male sperm held in a spermatheca nor the number of offspring produced after a single mating. However, we find evidence that SDPs are associated with a lack of second male sperm in the spermathecae after females remate. This raises the possibility that SDPs provide a mechanism for variation in sperm competition outcome among females.

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Last male sperm precedence is modulated by female remating rate inDrosophila melanogaster

Cited by 36 publications

References 60 publications

Making sense of intralocus and interlocus sexual conflict

Making sense of intralocus and interlocus sexual conflict

Female copulation song is modulated by seminal fluid

Structural variation in Drosophila melanogaster spermathecal ducts and its association with sperm competition dynamics

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