Evidence map›Paper›PMID 34086677›Full record

ArticlePloS one2021

Exceptional long-term sperm storage by a female vertebrate.

Brenna A Levine, Gordon W Schuett, Warren Booth

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
9.1field-weighted citation impact, top 2% 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

12 citing papers in PubMed, 32 citations in OpenAlex.

  1. Article
  2. Article
  3. Pre-oviposition development of the brown anole (Anolis sagrei).Developmental dynamics : an official publication of the American Association of Anatomists · 2026
    Article
  4. Article
  5. Parentage Analysis in a Green Sea Turtle (Ecology and evolution · 2025
    Article
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  12. The life history ofProceedings of the National Academy of Sciences of the United States of America · 2022
    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

3 authors at 1 institution in 1 country.

Brenna A LevineDepartment of Biological Science, The University of Tulsa, Tulsa, Oklahoma, United States of America.
Gordon W SchuettChiricahua Desert Museum, Rodeo, New Mexico, United States of America.
Warren BoothDepartment of Biological Science, The University of Tulsa, Tulsa, Oklahoma, United States of America.ORCID 0000-0003-2355-0702
Museum of Indian Arts and Culture · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Females of many vertebrate species have the capacity to store sperm within their reproductive tracts for prolonged periods of time. Termed long-term sperm storage, this phenomenon has many important physiological, ecological, and evolutionary implications, particularly to the study of mating systems, including male reproductive success and post-copulatory sexual selection. Reptiles appear particularly predisposed to long-term sperm storage, with records in most major lineages, with a strong emphasis on turtles and squamates (lizards, snakes, but not the amphisbaenians). Because facultative parthenogenesis is a competing hypothesis to explain the production of offspring after prolonged separation from males, the identification of paternal alleles through genetic analysis is essential. However, few studies in snakes have undertaken this. Here, we report on a wild-collected female Western Diamond-backed Rattlesnake, Crotalus atrox, maintained in isolation from the time of capture in September 1999, that produced two healthy litters approximately one and six years post capture. Genetic analysis of the 2005 litter, identified paternal contribution in all offspring, thus rejecting facultative parthenogenesis. We conclude that the duration of long-term sperm storage was approximately 6 years (71 months), making this the longest period over which a female vertebrate has been shown to store sperm that resulted in the production of healthy offspring.

Indexed as

AnimalsBiological EvolutionFemaleGenotypeMaleMicrosatellite RepeatsReproductionSexual Behavior, AnimalSpermatozoaVertebrates

Identifiers

PMID34086677
PMCPMC8177532
OpenAlexW3165146346

What OpenQuestion holds

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LicenceCC BY
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.