Evidence map›Paper›PMID 23782880›Full record

ArticleProceedings. Biological sciences2013

Neutral and selection-driven decay of sexual traits in asexual stick insects.

Tanja Schwander, Bernard J Crespi, Regine Gries, Gerhard Gries

Abstract read
In one paragraph

Article in Proceedings. Biological sciences, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed.

  1. Sexual conflict as a constraint on asexual reproduction: an empirical review.Biological reviews of the Cambridge Philosophical Society · 2025
    Review
  2. Interplay of asexual and sexual reproduction in bifunctional insects.Journal of the Royal Society, Interface · 2025
    Article
  3. Article
  4. Article
  5. Article
  6. Asexuality shapes traits in a hybrid fish.Nature communications · 2024
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Genomic Features of Parthenogenetic Animals.The Journal of heredity · 2021
    Article
  17. Article
  18. Spermathecal variation in temperate Opiliones.Integrative and comparative biology · 2020
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Tanja SchwanderCenter for Ecological and Evolutionary Studies, University of Groningen, Nijenborgh 7, 9700 CC Groningen, The Netherlands. tanja.schwander@unil.ch
Bernard J Crespi
Regine Gries
Gerhard Gries

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Environmental shifts and lifestyle changes may result in formerly adaptive traits becoming non-functional or maladaptive. The subsequent decay of such traits highlights the importance of natural selection for adaptations, yet its causes have rarely been investigated. To study the fate of formerly adaptive traits after lifestyle changes, we evaluated sexual traits in five independently derived asexual lineages, including traits that are specific to males and therefore not exposed to selection. At least four of the asexual lineages retained the capacity to produce males that display normal courtship behaviours and are able to fertilize eggs of females from related sexual species. The maintenance of male traits may stem from pleiotropy, or from these traits only regressing via drift, which may require millions of years to generate phenotypic effects. By contrast, we found parallel decay of sexual traits in females. Asexual females produced altered airborne and contact signals, had modified sperm storage organs, and lost the ability to fertilize their eggs, impeding reversals to sexual reproduction. Female sexual traits were decayed even in recently derived asexuals, suggesting that trait changes following the evolution of asexuality, when they occur, proceed rapidly and are driven by selective processes rather than drift.

Indexed as

Reproduction, AsexualSelection, GeneticSexual Behavior, AnimalAnimalsBiological EvolutionFemaleGenitalia, FemaleInsectaMaleMultifactorial InheritanceOvumasexualityregressive evolutionrelaxed selectiontrait decay

Identifiers

PMID23782880
PMCPMC3712416

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.