scholarly journals Sexual conflict and sex allocation

2009 ◽  
Vol 5 (5) ◽  
pp. 660-662 ◽  
Author(s):  
Tracey Chapman
Keyword(s):  
Sexual Conflict ◽  
Sex Allocation

Intralocus sexual conflict, adaptive sex allocation, and the heritability of fitness

2015 ◽  
Vol 28 (11) ◽  
pp. 1975-1985 ◽  
Author(s):  
R. Calsbeek ◽  
M. C. Duryea ◽  
D. Goedert ◽  
P. Bergeron ◽  
R. M. Cox
Keyword(s):  
Sexual Conflict ◽  
Sex Allocation ◽  
Intralocus Sexual Conflict

scholarly journals Consequences of population structure for sex allocation and sexual conflict

2020 ◽  
Author(s):  
Leonor R. Rodrigues ◽  
Mario Torralba Sáez ◽  
João Alpedrinha ◽  
Sophie Lefèvre ◽  
Muriel Brengues ◽  
...  
Keyword(s):  
Population Structure ◽  
Sexual Conflict ◽  
Sex Allocation ◽  
Spider Mite ◽  
No Reduction ◽  
Female Fitness ◽  
Random Dispersal ◽  
Random Pairing ◽  
Offspring Sex ◽  
Theoretical Predictions

AbstractBoth sex allocation and sexual conflict can be modulated by spatial structure. However, how the interplay between the type of dispersal and the scale of competition simultaneously affects these traits in sub-divided populations is rarely considered.We investigated sex allocation and sexual conflict evolution in meta-populations of the spider mite Tetranychus urticae evolving under budding (pairing females from the same patch) or random (pairing females from different patches) dispersal and either local (fixed sampling from each subpopulation) versus global (sampling as a function of subpopulation productivity) competition.Females evolving under budding dispersal produced less female-biased offspring sex ratios than those from the random dispersal selection regimes, contradicting theoretical predictions. In turn, the scale of competition did not have a strong effect on sex allocation. Males evolved under budding dispersal induced less female harm than those exposed to random dispersal, but there was no reduction in female fitness following exposure to multiple mates from either selection regime.This work highlights that population structure can impact the evolution of sex allocation and sexual conflict. We also discuss how selection on either trait may reciprocally affect the evolution of the other, for example via effects on fecundity.

scholarly journals Sex allocation and sexual conflict in simultaneously hermaphroditic animals

2009 ◽  
Vol 5 (5) ◽  
pp. 705-708 ◽  
Author(s):  
Lukas Schärer ◽  
Tim Janicke
Keyword(s):  
Sexual Selection ◽  
Theoretical Prediction ◽  
Experimental Test ◽  
Sexual Conflict ◽  
Sex Allocation ◽  
Theoretical Work ◽  
Theoretical Research ◽  
Sperm Donor ◽  
Simultaneous Hermaphrodites

Links between sex allocation (SA) and sexual conflict in simultaneous hermaphrodites have been evident since Charnov's landmark paper published 30 years ago. We discuss two links, namely the potential for sexual conflict over SA between sperm donor and recipient, and the importance of post-copulatory sexual selection and the resulting sexual conflict for the evolution of SA. We cover the little empirical and theoretical work exploring these links, and present an experimental test of one theoretical prediction. The link between SA and sexual conflict is an interesting field for future empirical and theoretical research.

scholarly journals How does breeding system variation modulate sexual antagonism?

2009 ◽  
Vol 5 (5) ◽  
pp. 717-720 ◽  
Author(s):  
Stéphanie Bedhomme ◽  
Giorgina Bernasconi ◽  
Joris M. Koene ◽  
Åsa Lankinen ◽  
H. S. Arathi ◽  
...  
Keyword(s):  
Sexual Reproduction ◽  
Sexual Conflict ◽  
Breeding System ◽  
Sex Allocation ◽  
Breeding Systems ◽  
Sexual Antagonism ◽  
Sexual Conflicts ◽  
Empirical Tests

The study of sexually antagonistic (SA) traits remains largely limited to dioecious (separate sex), mobile animals. However, the occurrence of sexual conflict is restricted neither by breeding system (the mode of sexual reproduction, e.g. dioecy or hermaphroditism) nor by sessility. Here, we synthesize how variation in breeding system can affect the evolution and expression of intra- and inter-locus sexual conflicts in plants and animals. We predict that, in hermaphrodites, SA traits will (i) display lower levels of polymorphism; (ii) respond more quickly to selection; and (iii) involve unique forms of interlocus conflict over sex allocation, mating roles and selfing rates. Explicit modelling and empirical tests in a broader range of breeding systems are necessary to obtain a general understanding of the evolution of SA traits.

scholarly journals Sexual conflict in action: An antagonistic relationship between maternal and paternal sex allocation in the tammar wallaby, Notamacropus eugenii

2019 ◽  
Vol 9 (8) ◽  
pp. 4340-4348
Author(s):  
Amy M. Edwards ◽  
Elissa Z. Cameron ◽  
Janine E. Deakin ◽  
Tariq Ezaz ◽  
Jorge C. Pereira ◽  
...  
Keyword(s):  
Sexual Conflict ◽  
Sex Allocation ◽  
Tammar Wallaby

scholarly journals Consequences of population structure for sex allocation and sexual conflict

2021 ◽  
Author(s):  
Leonor Rodrigues ◽  
Mario Torralba Sáez ◽  
João Alpedrinha ◽  
Sophie Lefèvre ◽  
Muriel Brengues ◽  
...  
Keyword(s):  
Population Structure ◽  
Sexual Conflict ◽  
Sex Allocation

scholarly journals Sexual conflict, sex allocation and the genetic system

2009 ◽  
Vol 5 (5) ◽  
pp. 682-685 ◽  
Author(s):  
David M. Shuker ◽  
Anna M. Moynihan ◽  
Laura Ross
Keyword(s):  
Sex Ratio ◽  
Sexual Conflict ◽  
Sex Allocation ◽  
Sex Ratios ◽  
Genetic System ◽  
Next Generation ◽  
Evolutionary Conflict ◽  
Genetic Systems ◽  
Males And Females ◽  
Evolutionary Consequences

Decisions over what sex ratio to produce can have far-reaching evolutionary consequences, for both offspring and parents. However, the extent to which males and females come into evolutionary conflict over aspects of sex allocation depends on the genetic system: when genes are passed to the next generation unequally by the two sexes (as in haplodiploidy, for example), this biased transmission can facilitate a range of conflicts not seen in diploids. However, much less attention has been paid to these forms of sexual conflict, not least because it has not always been clear how the conflicts could be realized. Here we consider how biased gene transmission, as expressed in different genetic systems, enhances the opportunity for sex ratio conflict and give empirical examples that confirm that males and females have the opportunity to influence sex ratios.

scholarly journals Sexual conflict and sex allocation

2010 ◽  
Vol 6 (3) ◽  
pp. 430-430
Author(s):  
Tracey Chapman
Keyword(s):  
Sexual Conflict ◽  
Sex Allocation

scholarly journals A role for sexual conflict in the evolution of reproductive traits in Nasonia wasps?

2009 ◽  
Vol 59 (4) ◽  
pp. 417-434 ◽  
Author(s):  
Leo Beukeboom ◽  
Bart Pannebakker ◽  
Sylvia Gerritsma ◽  
Elzemiek Geuverink
Keyword(s):  
Sexual Conflict ◽  
Sex Allocation ◽  
Species Differences ◽  
Reproductive Traits ◽  
Reproductive Behaviour ◽  
Conflict Theory ◽  
Mating Frequency ◽  
Mating Rate ◽  
Heterospecific Male ◽  
Female Lifespan

AbstractSexual conflict theory predicts that female and male reproductive traits coevolve resulting in disruption of reproductive behaviour upon mating of individuals from diverged populations. We used interfertile species of haplodiploid Nasonia wasps to compare re-mating frequency, longevity, oviposition rate and sperm use of conspecifically and heterospecifically mated females. Females that first mated with a heterospecific male re-mated more often a second time, indicating that conspecific males reduce female receptivity more. Mating did not affect female lifespan. Lifetime production of sons and daughters was significantly reduced in heterospecifically mated females. Dissection of females confirmed that heterospecific sperm survives equally well as conspecific sperm during storage in the spermatheca. Differences in daily fecundity and age at which females become sperm depleted could in part be explained by species differences in ovariole numbers. We conclude that sexual conflict may play a role in the evolution of female mating rate, fecundity and sex allocation in Nasonia.

scholarly journals Intra-locus sexual conflict and sexually antagonistic genetic variation in hermaphroditic animals

2010 ◽  
Vol 278 (1703) ◽  
pp. 161-169 ◽  
Author(s):  
Jessica K. Abbott
Keyword(s):  
Genetic Variation ◽  
Sexual Conflict ◽  
Sex Allocation ◽  
A Priori ◽  
Natural Populations ◽  
Antagonistic Pleiotropy ◽  
Sexual Antagonism ◽  
Unique Form ◽  
Asymmetric Effects ◽  
Simultaneous Hermaphrodites

Intra-locus sexual conflict results when sex-specific selection pressures for a given trait act against the intra-sexual genetic correlation for that trait. It has been found in a wide variety of taxa in both laboratory and natural populations, but the importance of intra-locus sexual conflict and sexually antagonistic genetic variation in hermaphroditic organisms has rarely been considered. This is not so surprising given the conceptual and theoretical association of intra-locus sexual conflict with sexual dimorphism, but there is no a priori reason why intra-locus sexual conflict cannot occur in hermaphroditic organisms as well. Here, I discuss the potential for intra-locus sexual conflict in hermaphroditic animals and review the available evidence for such conflict, and for the existence of sexually antagonistic genetic variation in hermaphrodites. I argue that mutations with asymmetric effects are particularly likely to be important in mediating sexual antagonism in hermaphroditic organisms. Moreover, sexually antagonistic genetic variation is likely to play an important role in inter-individual variation in sex allocation and in transitions to and from gonochorism (separate sexes) in simultaneous hermaphrodites. I also describe how sequential hermaphrodites may experience a unique form of intra-locus sexual conflict via antagonistic pleiotropy. Finally, I conclude with some suggestions for further research.

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