Effectiveness of sexual selection in preventing fitness deterioration in bulb mite populations under relaxed natural selection

Radwan, Jacek; Unrug, Juliusz; Śnigórska, Katarzyna; Gawrońska, K

doi:10.1046/j.1420-9101.2003.00646.x

Cited by 54 publications

(63 citation statements)

References 51 publications

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“…It was then maintained as a large population (Ͼ1000 individuals) for more than 100 generations before commencement of this research. Culturing conditions were 22-26ЊC, Ͼ90% humidity, and food consisted of a 3:1 mixture of powdered yeast and wheat germ ad libitum (see Radwan et al 2004 for details). The same feeding, humidity, and temperature conditions were maintained throughout the procedures described below.…”

Section: Culturingmentioning

confidence: 99%

Evolution Under Relaxed Sexual Conflict in the Bulb Mite Rhizoglyphus Robini

Tilszer¹,

Antoszczyk²,

Ssaek³

et al. 2006

Evolution

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Abstract. The experimental evolution under different levels of sexual conflict have been used to demonstrate antagonistic coevolution in muscids, but among other taxa a similar approach has not been employed. Here, we describe the results of 37 generations of evolution under either experimentally enforced monogamy or polygamy in the bulb mite Rhizoglyphus robini. Three replicates were maintained for each treatment. Monogamy makes male and female interests congruent; thus selection is expected to decrease harmfulness of males to their partners. Our results were consistent with this prediction in that females from monogamous lines achieved lower fecundity when housed with males from polygamous lines. Fecundity of polygamous females was not affected by mating system under which their partners evolved, which suggests that they were more resistant to male-induced harm. As predicted by the antagonistic coevolution hypothesis, the decrease in harmfulness of monogamous males was accompanied by a decline in reproductive competitiveness. In contrast, female fecundity and embryonic viability, which were not expected to be correlated with male harmfulness, did not differ between monogamous and polygamous lines. None of the fitness components assayed differed between individuals obtained from crosses between parents from the same line and those obtained from crosses between parents from different lines within the same mating system. This indicates that inbreeding depression did not confound our results. However, interpretation of our results is complicated by the fact that both males and females from monogamous lines evolved smaller body size compared to individuals from polygamous lines. Although a decrease in reproductive performance of males from monogamous lines was still significant when body size was taken into account, we were not able to separate the effects of male body size and mating system in their influence on fecundity of their female partners.

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Section: Culturingmentioning

confidence: 99%

Evolution Under Relaxed Sexual Conflict in the Bulb Mite Rhizoglyphus Robini

Tilszer¹,

Antoszczyk²,

Ssaek³

et al. 2006

Evolution

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“…Selection for mate-acquisition traits could lead to deteriorating population-level performance if sexual and natural selection act in opposite directions, but the theoretical aspects of these questions remain largely unanswered to date , and the empirical evidence appears likewise conflicting (e.g. McLain et al 1995;Badyaev & Ghalambor 1998;Sorci et al 1998;Prinzing et al 2002;Doherty et al 2003;Morrow & Pitcher 2003;Morrow & Fricke 2004;Radwan 2004;Radwan et al 2004). In this review, instead of asking how sexual selection affects population dynamics (e.g.…”

Section: Introductionmentioning

confidence: 96%

Lonely hearts or sex in the city? Density-dependent effects in mating systems

Kokko

Rankin

2006

Phil. Trans. R. Soc. B

591

560

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Two very basic ideas in sexual selection are heavily influenced by numbers of potential mates: the evolution of anisogamy, leading to sex role differentiation, and the frequency dependence of reproductive success that tends to equalize primary sex ratios. However, being explicit about the numbers of potential mates is not typical to most evolutionary theory of sexual selection. Here, we argue that this may prevent us from finding the appropriate ecological equilibria that determine the evolutionary endpoints of selection. We review both theoretical and empirical advances on how population density may influence aspects of mating systems such as intrasexual competition, female choice or resistance, and parental care. Density can have strong effects on selective pressures, whether or not there is phenotypic plasticity in individual strategies with respect to density. Mating skew may either increase or decrease with density, which may be aided or counteracted by changes in female behaviour. Switchpoints between alternative mating strategies can be density dependent, and mate encounter rates may influence mate choice (including mutual mate choice), multiple mating, female resistance to male mating attempts, mate searching, mate guarding, parental care, and the probability of divorce. Considering density-dependent selection may be essential for understanding how populations can persist at all despite sexual conflict, but simple models seem to fail to predict the diversity of observed responses in nature. This highlights the importance of considering the interaction between mating systems and population dynamics, and we strongly encourage further work in this area.

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“…Within this framework, numerous studies have tested the efficacy of sexual selection in aiding adaptation by modifying the strength of sexual selection to study evolutionary responses from standing genetic variation (e.g., Holland and Rice 1999;Holland 2002;Martin and Hosken 2003;Rundle et al 2006;Fricke and Arnqvist 2007;Morrow et al 2008;Jarzebowska and Radwan 2010;Maklakov et al 2010;Plesnar-Bielak et al 2012;Chenoweth et al 2015;Lumley et al 2015) or purging naturally accumulated (e.g., Radwan et al 2004;Rundle et al 2006;Mallet et al 2011;McGuigan et al 2011;Sharp and Agrawal 2013) or artificially induced/introduced deleterious mutations (e.g., Radwan 2004;Sharp and Agrawal 2008;Hollis and Houle 2011;Plesnar et al 2011;Arbuthnott and Rundle 2012;Clark et al 2012;Almbro and Simmons 2013;Power and Holman 2015;Grieshop et al 2016). The results of these studies have been inconsistent, which allows several insights.…”

Section: Introductionmentioning

confidence: 99%

Intralocus Sexual Conflict and the Tragedy of the Commons in Seed Beetles

Berger

Martinossi‐Allibert

Grieshop

et al. 2016

The American Naturalist

128

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Online enhancements: appendixes, supplemental PDF. Dryad data: http://dx.doi.org/10.5061/dryad.bc94c.abstract: The evolution of male traits that inflict direct harm on females during mating interactions can result in a so-called tragedy of the commons, where selfish male strategies depress population viability. This tragedy of the commons can be magnified by intralocus sexual conflict (IaSC) whenever alleles that reduce fecundity when expressed in females spread in the population because of their benefits in males. We evaluated this prediction by detailed phenotyping of 73 isofemale lines of the seed beetle Callosobruchus maculatus. We quantified genetic variation in life history and morphology, as well as associated covariance in male and female adult reproductive success. In parallel, we created replicated artificial populations of each line and measured their productivity. Genetic constraints limited independent trait expression in the sexes, and we identified several instances of sexually antagonistic covariance between traits and fitness, signifying IaSC. Population productivity was strongly positively correlated to female adult reproductive success but uncorrelated with male reproductive success. Moreover, male (female) phenotypic optima for several traits under sexually antagonistic selection were exhibited by the genotypes with the lowest (highest) population productivity. Our study forms a direct link between individuallevel sex-specific selection and population demography and places lifehistory traits at the epicenter of these dynamics.

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Effectiveness of sexual selection in preventing fitness deterioration in bulb mite populations under relaxed natural selection

Cited by 54 publications

References 51 publications

Evolution Under Relaxed Sexual Conflict in the Bulb Mite Rhizoglyphus Robini

Evolution Under Relaxed Sexual Conflict in the Bulb Mite Rhizoglyphus Robini

Lonely hearts or sex in the city? Density-dependent effects in mating systems

Intralocus Sexual Conflict and the Tragedy of the Commons in Seed Beetles

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