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Related Experiment Videos

Scanning electron microscope studies of turkey semen.

B J Marquez, F X Ogasawara

    Poultry Science
    |July 1, 1975
    PubMed
    Summary
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    Yellowish turkey semen contains abnormal spermatozoa and macrophages, leading to significantly reduced fertility in hens. Morphological examination revealed coiling as the primary sperm defect.

    Area of Science:

    • Reproductive biology
    • Avian science
    • Veterinary medicine

    Background:

    • Semen quality is crucial for successful avian reproduction.
    • Morphological abnormalities in spermatozoa can impact fertility.
    • Yellowish semen in turkeys has been anecdotally linked to poor fertility.

    Purpose of the Study:

    • To morphologically characterize turkey spermatozoa.
    • To investigate the composition of yellowish turkey semen.
    • To correlate semen characteristics with fertility rates.

    Main Methods:

    • Scanning electron microscopy was used for detailed sperm morphology analysis.
    • Semen samples were classified as normal or yellowish.
    • Fertility was assessed by inseminating hens with different semen types and observing hatch rates.

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    Main Results:

    • Normal turkey spermatozoa dimensions were established (e.g., total length 76.7 µm).
    • Yellowish semen exhibited increased abnormal spermatozoa, primarily with coiled tails.
    • Large macrophages, sometimes containing phagocytized sperm, were identified in yellowish semen.
    • Fertility was significantly lower (57.6%) in hens inseminated with yellowish semen compared to control semen (92.1%).

    Conclusions:

    • Yellowish semen in turkeys is associated with increased sperm abnormalities and the presence of macrophages.
    • These factors contribute to a substantial decrease in fertility.
    • Semen color can serve as an indicator of potential reproductive issues in turkeys.