Evidence map›Paper›PMID 33462771›Full record

ArticlePrimates; journal of primatology2021

Comparative analysis of sperm motility in liquid and seminal coagulum portions between Bornean orangutan (Pongo pygmaeus) and chimpanzee (Pan troglodytes).

Kodzue Kinoshita, Yoriko Indo, Tomoyuki Tajima, Noko Kuze, Etsuko Miyakawa, Toshio Kobayashi, Tomoyuki Nakamura, Mitsuaki Ogata, Fumihiko Okumura, Takashi Hayakawa and 5 more

Erratum issuedAbstract read
PubMed Publisher
In one paragraph

Article in Primates; journal of primatology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
0.7field-weighted citation impact, top 29% 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

1 citing paper in PubMed, 4 citations in OpenAlex.

  1. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors at 6 institutions in 1 country.

Kodzue KinoshitaWildlife Research Center, Kyoto University, Kyoto, Kyoto, 606-8203, Japan. kinoshita.kodzue.8v@kyoto-u.ac.jp.ORCID http://orcid.org/0000-0002-5804-5485
Yoriko IndoPrimate Research Institute, Kyoto University, Inuyama, Aichi, 484-8506, Japan.
Tomoyuki TajimaHuman Evolution Studies, Graduate School of Science, Kyoto University, Kyoto, Kyoto, 606-8502, Japan.ORCID http://orcid.org/0000-0002-5034-2047
Noko KuzeJapan Society for the Promotion of Science, Chiyoda, Tokyo, 102-0083, Japan.ORCID http://orcid.org/0000-0003-4852-5351
Etsuko MiyakawaKanazawa Zoological Gardens, Yokohama, Kanagawa, 236-0042, Japan.
Toshio KobayashiZoorasia Yokohama Zoological Gardens, Yokohama, Kanagawa, 241-0001, Japan.
Tomoyuki NakamuraChiba Zoological Park, Chiba, Chiba, 264-0037, Japan.
Mitsuaki OgataPreservation and Research Center, The City of Yokohama, Yokohama, Kanagawa, 241-0001, Japan.
Fumihiko OkumuraJapan Monkey Centre, Inuyama, Aichi, 484-0081, Japan.
Takashi HayakawaPrimate Research Institute, Kyoto University, Inuyama, Aichi, 484-8506, Japan.ORCID http://orcid.org/0000-0002-1037-0350
Naruki MorimuraWildlife Research Center, Kyoto University, Kyoto, Kyoto, 606-8203, Japan.ORCID http://orcid.org/0000-0002-9117-4828
Yusuke MoriWildlife Research Center, Kyoto University, Kyoto, Kyoto, 606-8203, Japan.
Munehiro OkamotoPrimate Research Institute, Kyoto University, Inuyama, Aichi, 484-8506, Japan.
Yasuhiko OzakiDepartment of Obstetrics and Gynecology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Aichi, 467-8601, Japan.ORCID http://orcid.org/0000-0002-1295-5600
Satoshi HirataWildlife Research Center, Kyoto University, Kyoto, Kyoto, 606-8203, Japan. hirata.satoshi.8z@kyoto-u.ac.jp.ORCID http://orcid.org/0000-0002-1026-6270
Kyoto University · JPTokyo Zoological Park Society · JPHokkaido University of Science · JPJapan Monkey Centre · JPJapan Society for the Promotion of Science · JPNagoya City University · JP

Funding

JSPS KAKENHI Grant-in-Aid for Young Scientists (B) 16K18482JSPS KAKENHI Grant-in-Aid for Young Scientists (B) 16K18630
6 · The paper itself

Abstract

Coagulum in the semen of some primates plays different roles, depending on the species. In the present study, we examined sperm motility in the coagulum and liquid portions of semen collected from captive individuals from two great ape species: two adult Bornean orangutans (Pongo pygmaeus) (n = 27) and three adult chimpanzees (Pan troglodytes) (n = 14). The results revealed that orangutan sperm remained motile for significantly longer in the coagulum than in the liquid portion (> 18 h). By contrast, chimpanzee sperm motility did not differ significantly over time between the two portions of the semen, although motility was slightly higher in the liquid portion than in the coagulum. The evolution of the seminal coagulum is thought to be related to postcopulatory sperm competition; however, functions of seminal coagulum have not been completely elucidated. Our data from the orangutan semen suggest that in this species, seminal coagulum may strengthen own-sperm survival. This report is the first to provide evidence for this distinctive function of the seminal coagulum. This unique property of orangutan seminal coagulum might be attributable to their reproductive traits, e.g., difficulty in predicting ovulation due to a lack of genital swelling during estrus. The orangutan is a Critically Endangered species, and captive breeding, including artificial insemination (AI), is expected. However, worldwide, only one case of orangutan AI has been successful. Our findings may contribute to an understanding of their basic semen characteristics and help improve the AI method.

Indexed as

HominidaeSperm MotilityAnimalsFemaleMalePan troglodytesPongo pygmaeusSemenEjaculated semenGreat apeMale reproductionSeminal coagulumSperm motility

Identifiers

PMID33462771
OpenAlexW3126020074

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.