Paternity analysis of wild‐caught females shows that sperm package size and placement influence fertilization success in the bushcricket <i><scp>P</scp>holidoptera griseoaptera</i>

Parker, Darren J.; Zaborowska, Julia; Ritchie, Michael G.; Vahed, Karim

doi:10.1111/mec.14089

Cited by 6 publications

(26 citation statements)

References 70 publications

(171 reference statements)

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“…comm.). Spermatodoses are capsules of sperm that are formed within the female's sperm storage organ (spermatheca) each time she mates (Vahed 2003, 2006, Parker et al 2017. Microsatellite analysis of sperm from spermatodoses in the bushcricket Pholidoptera griseoaptera, which had mated under natural field conditions, revealed that in over 80% of females, each spermatodose within the spermatheca was from a different male (Parker et al 2017).…”

Section: Methodsmentioning

confidence: 99%

“…Spermatodoses are capsules of sperm that are formed within the female's sperm storage organ (spermatheca) each time she mates (Vahed 2003, 2006, Parker et al 2017. Microsatellite analysis of sperm from spermatodoses in the bushcricket Pholidoptera griseoaptera, which had mated under natural field conditions, revealed that in over 80% of females, each spermatodose within the spermatheca was from a different male (Parker et al 2017). Re-mating between pairs in bushcrickets is unlikely due to the long sexual refractory periods of both males and females that occur after each mating, which are associated with the transfer of the large spermatophores that are typical of this family (Vahed 2007).…”

Section: Methodsmentioning

confidence: 99%

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Male genital titillators and the intensity of post-copulatory sexual selection across bushcrickets

et al. 2017

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Animal genitalia are diverse and a growing body of evidence suggests that they evolve rapidly under post-copulatory sexual selection. This process is predicted to be more intense in polyandrous species, although there have been very few comparative studies of the relationship between the complexity of genital structures in males and measures of the degree of polyandry. In some bushcricket families, males possess sclerotised copulatory structures known as titillators, which are inserted into the female's genital chamber and moved rhythmically. Like other genital structures, bushcricket titillators are widely used as important taxonomic characters and show considerable variation across species in structure, shape and the extent to which they are spined. Here, we examine relationships between the presence/absence of titillators, titillator complexity and both mating frequency and the degree of polyandry in bushcrickets, using phylogenetic comparative analyses. Using published sources combined with original observations, data were obtained for the mean level of polyandry, the duration of the male and female sexual refractory periods and the level of complexity of titillators. To analyse data, we fitted phylogenetic generalised least squares models. No significant relationships were found between titillator presence or complexity and either the level of polyandry, duration of the male's sexual refractory period or the ratio of the female and male sexual refractory periods. The duration of the female's refractory period, however, was positively associated with titillator presence and negatively associated with titillator complexity. The data therefore partially support the hypothesis that post-copulatory sexual selection drives genital evolution in this taxon.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Male genital titillators and the intensity of post-copulatory sexual selection across bushcrickets

et al. 2017

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“…For instance, Walling, Pemberton, Hadfield, and Kruuk () show that parentage analysis in red deer can be improved by using masterbayes to include phenotypic data. masterbayes has also been used, in a full‐probability framework, to estimate a number of interesting ecological parameters, such as the fecundities of dispersing banner‐tail kangaroo rats (Waser, Nichols, & Hadfield, ) and the relationships between mating order, sperm package size and siring success in bush crickets (Parker, Zaborowska, Ritchie, & Vahed, ). Other full‐probability models, similar to those implemented in masterbayes , have been developed independently using the tools available in r , for example, to estimate distances of seed and pollen movement in the red oak (Moran & Clark, ; see also Robledo, and Chybicki, for non‐R implementations).…”

Section: Choosing Softwarementioning

confidence: 99%

The future of parentage analysis: From microsatellites to SNPs and beyond

2019

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Parentage analysis is a cornerstone of molecular ecology that has delivered fundamental insights into behaviour, ecology and evolution. Microsatellite markers have long been the king of parentage, their hypervariable nature conferring sufficient power to correctly assign offspring to parents. However, microsatellite markers have seen a sharp decline in use with the rise of next‐generation sequencing technologies, especially in the study of population genetics and local adaptation. The time is ripe to review the current state of parentage analysis and see how it stands to be affected by the emergence of next‐generation sequencing approaches. We find that single nucleotide polymorphisms (SNPs), the typical next‐generation sequencing marker, remain underutilized in parentage analysis but are gaining momentum, with 58 SNP‐based parentage analyses published thus far. Many of these papers, particularly the earlier ones, compare the power of SNPs and microsatellites in a parentage context. In virtually every case, SNPs are at least as powerful as microsatellite markers. As few as 100–500 SNPs are sufficient to resolve parentage completely in most situations. We also provide an overview of the analytical programs that are commonly used and compatible with SNP data. As the next‐generation parentage enterprise grows, a reliance on likelihood and Bayesian approaches, as opposed to strict exclusion, will become increasingly important. We discuss some of the caveats surrounding the use of next‐generation sequencing data for parentage analysis and conclude that the future is bright for this important realm of molecular ecology.

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“…Since other males have the same reproductive interests, they also attempt to fertilize as many females as possible, and there is an energy-demanding competition between them (Simmons, 2005). However, because a female acquires sperm from several males and collects them inside the reproductive apparatus (spermatheca) in the form of spermatodoses for the rest of its life, sperm competition for egg fertilization keeps on going (Hockham, Graves, & Ritchie, 2004;Parker, Zaborowska, Ritchie, & Vahed, 2017;Simmons, 2005;Wedell et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…The size of the spermatodoses could be accepted as a proxy for ejaculate volume and likely also as the overall spermatophore size (Parker et al, 2017;Vahed, 2003;Vahed & Gilbert, 1996). Although females should prefer larger males, spermatophore production is energyconsuming (Gwynne, 1984a;Simmons, 1990Simmons, , 1993) and a negative association has been found among-and within-species between spermatodose size and mating rate in bush-crickets (Jarčuška & Kaňuch, 2014;Vahed, 2006).…”

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confidence: 99%

Size‐dependent mating pattern in a nuptial gift‐giving insect

Dorková

Naďo

Jarčuška

et al. 2018

Ecology and Evolution

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The reproductive interests of females and males often diverge in terms of the number of mating partners, an individual’s phenotype, origin, genes, and parental investment. This conflict may lead to a variety of sex‐specific adaptations and also affect mate choice in both sexes. We conducted an experiment with the bush‐cricket Pholidoptera griseoaptera (Orthoptera, Tettigoniidae), a species in which females receive direct nutritional benefits during mating. Mated individuals could be assigned due to the genotype of male spermatodoses, which are stored in the female’s spermatheca. After 3 weeks of possible copulations in established mating groups which were random replications with four females and males we did not find consistent assortative mating preference regarding to body size of mates. However, our results showed that the frequency of within‐pair copulations (192 analyzed mating events in 128 possible pairwise combinations) was positively associated with the body size of both mated individuals with significant interaction between sexes (having one mate very large, association between body size and the number of copulations has weaken). Larger individuals also showed a higher degree of polygamy. This suggests that body size of this nuptial gift‐giving insect species is an important sexual trait according to which both sexes choose their optimal mating partner.

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Paternity analysis of wild‐caught females shows that sperm package size and placement influence fertilization success in the bushcricket Pholidoptera griseoaptera

Cited by 6 publications

References 70 publications

Male genital titillators and the intensity of post-copulatory sexual selection across bushcrickets

Male genital titillators and the intensity of post-copulatory sexual selection across bushcrickets

The future of parentage analysis: From microsatellites to SNPs and beyond

Size‐dependent mating pattern in a nuptial gift‐giving insect

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