Should he stay or should he go: male influence on offspring sex ratio via postcopulatory attendance

King, B. H.; Kuban, K. A.

doi:10.1007/s00265-012-1369-5

Cited by 16 publications

(11 citation statements)

References 43 publications

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“…The ‘guarding-now’ hypothesis postulates that this mate guarding takes the form of physical interference with mating attempts by other males (e.g. in Aphytis melinus mate guarding reduces mating but does not reduce receptivity: Allen et al , 1994), whereas the ‘guarding-in-absentia’ hypothesis implies reduced receptivity of females, or reduced female attractiveness to other males (King & Kuban, 2012). The post-copulatory courtship signals in a number of parasitoid wasps fits with the guarding-in-absentia hypothesis ( Nasonia vitripennis , Barrass, 1960; van den Assem & Visser, 1976; Lariophagus distinguendus , Steiner et al , 2008; Spalangia endius , King, 2010).…”

Section: Sexual Selection In Parasitoid Waspsmentioning

confidence: 99%

Beyond sex allocation: the role of mating systems in sexual selection in parasitoid wasps

2014

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Despite the diverse array of mating systems and life histories which characterise the parasitic Hymenoptera, sexual selection and sexual conflict in this taxon have been somewhat overlooked. For instance, parasitoid mating systems have typically been studied in terms of how mating structure affects sex allocation. In the past decade, however, some studies have sought to address sexual selection in the parasitoid wasps more explicitly and found that, despite the lack of obvious secondary sexual traits, sexual selection has the potential to shape a range of aspects of parasitoid reproductive behaviour and ecology. Moreover, various characteristics fundamental to the parasitoid way of life may provide innovative new ways to investigate different processes of sexual selection. The overall aim of this review therefore is to re-examine parasitoid biology with sexual selection in mind, for both parasitoid biologists and also researchers interested in sexual selection and the evolution of mating systems more generally. We will consider aspects of particular relevance that have already been well studied including local mating structure, sex allocation and sperm depletion. We go on to review what we already know about sexual selection in the parasitoid wasps and highlight areas which may prove fruitful for further investigation. In particular, sperm depletion and the costs of inbreeding under chromosomal sex determination provide novel opportunities for testing the role of direct and indirect benefits for the evolution of mate choice.

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Section: Sexual Selection In Parasitoid Waspsmentioning

confidence: 99%

Beyond sex allocation: the role of mating systems in sexual selection in parasitoid wasps

2014

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“…In Nasonia , males from different strains sire offspring that vary in sex ratios [28]. Mate-guarding after copulation by male Urolepis rufipes parasitoids increases the proportion of daughters among the offspring [33]. Similarly, nest-guarding by males in the mud-daubing wasp Trypoxylon politum allows their mates more time for nest provisioning, a possible strategy for enhancing the production of daughters [34].…”

Section: Discussionmentioning

confidence: 99%

Sex Allocation in a Polyembryonic Parasitoid with Female Soldiers: An Evolutionary Simulation and an Experimental Test

et al. 2013

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Parasitoid wasps are convenient subjects for testing sex allocation theory. However, their intricate life histories are often insufficiently captured in simple analytical models. In the polyembryonic wasp Copidosoma koehleri, a clone of genetically identical offspring develops from each egg. Male clones contain fewer individuals than female clones. Some female larvae develop into soldiers that kill within-host competitors, while males do not form soldiers. These features complicate the prediction of Copidosoma’s sex allocation. We developed an individual-based simulation model, where numerous random starting strategies compete and recombine until a single stable sex allocation evolves. Life-history parameter values (e.g., fecundity, clone-sizes, larval survival) are estimated from experimental data. The model predicts a male-biased sex allocation, which becomes more extreme as the probability of superparasitism (hosts parasitized more than once) increases. To test this prediction, we reared adult parasitoids at either low or high density, mated them, and presented them with unlimited hosts. As predicted, wasps produced more sons than daughters in all treatments. Males reared at high density (a potential cue for superparasitism) produced a higher male bias in their offspring than low-density males. Unexpectedly, female density did not affect offspring sex ratios. We discuss possible mechanisms for paternal control over offspring sex.

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“…Offspring sex ratios are about 2.5 females per male, i.e., 71% female (Matthews and Petersen 1990), and males emerge before females and are generally smaller (Powell et al 2003; personal observation). Males and females noticeably respond to each other only at fairly close range, a couple of wasp lengths (King and Kuban 2012;Cooper et al 2013). In most cases, the response begins with the male running after the female as his antennae move up and down and/or he briefly fans his wings.…”

Section: Biology Of Urolepis Rufipesmentioning

confidence: 99%

Mating Status Effects on Sexual Response of Males and Females in the Parasitoid Wasp Urolepis rufipes

King

Miller

2018

J Insect Behav

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Although mate preferences are most commonly examined in females, they are often found in both sexes. In the parasitoid wasp Urolepis rufipes, both female and male mating status affected certain aspects of sexual interactions. Female mating status mattered only in the later stages of mating. Males did not discriminate between virgin and mated females in terms of which they contacted or mounted first. However, once mounted, most virgin females were receptive to copulation, whereas very few mated females were. Whether a male's mating status affected his own sexual response depended on the female's ability to respond and the stage of mating. Examining male behavior toward dead females allowed elimination of the role of female behavior in how males responded. Virgin and mated males are both attracted to dead females as evidenced by their fanning their wings at such females. However, mated males were quicker than virgin males to contact and to mount in an experiment with dead females, whereas there was no such differential response in an experiment with live females. This difference is consistent with greater female sexual responsiveness to virgin males. Male mating status also affected female receptivity to copulate. Once mounted, live virgin females were less likely to become receptive to copulation by mated males than to virgin males, but only in a choice experiment, not in a no-choice experiment.

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Should he stay or should he go: male influence on offspring sex ratio via postcopulatory attendance

Cited by 16 publications

References 43 publications

Beyond sex allocation: the role of mating systems in sexual selection in parasitoid wasps

Beyond sex allocation: the role of mating systems in sexual selection in parasitoid wasps

Sex Allocation in a Polyembryonic Parasitoid with Female Soldiers: An Evolutionary Simulation and an Experimental Test

Mating Status Effects on Sexual Response of Males and Females in the Parasitoid Wasp Urolepis rufipes

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