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Sperm Structure and Semen Composition01:22

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During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
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Phosphopeptide Analysis of Rodent Epididymal Spermatozoa
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New insights in Cercopithecinae spermatozoa.

Guillaume Martinez1,2, Cécile Garcia3, Céline Francois-Brazier4

  • 1Hôpital Couple-Enfant, Centre Hospitalier Universitaire de Grenoble, UM de Génétique Chromosomique, 38000Grenoble, France.

Zygote (Cambridge, England)
|March 18, 2021
PubMed
Summary

This study provides novel sperm morphometric data for several primate species, including the endangered Roloway monkey (Cercopithecus roloway). These findings offer valuable insights for primate conservation and reproductive research.

Keywords:
ARTNon-human primatesSperm morphologySperm morphometrySperm parameters

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Area of Science:

  • Primate reproductive biology
  • Sperm morphology and morphometrics
  • Conservation genetics

Background:

  • Sperm morphometric and morphologic data are crucial for assessing fertility, enhancing assisted reproduction, and conserving genetic material.
  • Understanding primate sperm characteristics aids in detecting inbreeding in endangered species.

Purpose of the Study:

  • To present the first sperm morphologic and morphometric data for Cercopithecus neglectus, Cercopithecus cephus, Papio papio, and the critically endangered Cercopithecus roloway.
  • To provide comparative data with other Cercopithecinae species, including Allochrocebus lhoesti, Mandrillus sphinx, and Papio anubis.
  • To establish a foundational dataset for understanding primate sperm variation.

Main Methods:

  • Spermatozoa were collected from the epididymis of multiple primate species.
  • Key morphometric parameters were measured: head length, width, perimeter, area, midpiece length, and total flagellum length.
  • Derived parameters including head volume, ellipticity, elongation, roughness, and regularity were calculated.

Main Results:

  • Data align with general Cercopithecinae sperm morphology and morphometric proportions.
  • Cercopithecus cephus exhibited a notably narrow head width (2.76 ± 0.26 µM).
  • Cercopithecus roloway displayed a shorter midpiece length (6.65 ± 0.61 µM).

Conclusions:

  • The generated dataset is a significant contribution, particularly for the endangered Cercopithecus roloway.
  • Further research incorporating more specimens and ecological data is needed to elucidate mechanisms behind observed morphological differences.
  • This study enhances our understanding of primate reproductive ecology and morphology.