Evidence map›Paper›PMID 21220334›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2011

Mating behavior and the evolution of sperm design.

Lukas Schärer, D Timothy J Littlewood, Andrea Waeschenbach, Wataru Yoshida, Dita B Vizoso

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 55 papers.

0numbers the graph read from it
0cells of the map it votes in
55citing papers in PubMed
14.9field-weighted citation impact, top 1% of its field
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

55 citing papers in PubMed, 135 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Unraveling patterns of disrupted gene expression across a complex tissue.Evolution; international journal of organic evolution · 2022
    Article
  13. Article
  14. B Chromosomes in Free-Living Flatworms of the GenusInternational journal of molecular sciences · 2021
    Article
  15. Article
  16. Article
  17. Article
  18. Impact of Segmented Magnetization on the Flagellar Propulsion of Sperm-Templated Microrobots.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2021
    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

5 authors at 3 institutions in 3 countries.

Lukas SchärerEvolutionary Biology, Zoological Institute, University of Basel, 4051 Basel, Switzerland. lukas.scharer@unibas.ch
D Timothy J Littlewood
Andrea Waeschenbach
Wataru Yoshida
Dita B Vizoso
Natural History Museum · GBUniversity of Basel · CHHirosaki University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sperm are the most diverse of all animal cell types, and much of the diversity in sperm design is thought to reflect adaptations to the highly variable conditions under which sperm function and compete to achieve fertilization. Recent work has shown that these conditions often evolve rapidly as a consequence of multiple mating, suggesting a role for sexual selection and sexual conflict in the evolution of sperm design. However, very little of the striking diversity in sperm design is understood functionally, particularly in internally fertilizing organisms. We use phylogenetic comparative analyses covering 16 species of the hermaphroditic flatworm genus Macrostomum to show that a complex sperm design is associated with reciprocal mating and that this complexity is lost secondarily when hypodermic insemination--sperm injection through the epidermis--evolves. Specifically, the complex sperm design, which includes stiff lateral bristles, is likely a male persistence trait associated with sexual conflicts over the fate of received ejaculates and linked to female resistance traits, namely an intriguing postcopulatory sucking behavior and a thickened epithelium of the sperm-receiving organ. Our results suggest that the interactions between sperm donor, sperm, and sperm recipient can change drastically when hypodermic insemination evolves, involving convergent evolution of a needle-like copulatory organ, a simpler sperm design, and a simpler female genital morphology. Our study documents that a shift in the mating behavior may alter fundamentally the conditions under which sperm compete and thereby lead to a drastic change in sperm design.

Indexed as

Biological EvolutionAnimalsDNA, HelminthDNA, RibosomalFemaleMaleMolecular Sequence DataPhylogenyPlatyhelminthsReproductionSequence Analysis, DNASexual Behavior, AnimalSpecies SpecificitySpermatozoaDNA, HelminthDNA, Ribosomal

Identifiers

PMID21220334
PMCPMC3029721
OpenAlexW2028752116

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.