Factors Affecting the Survival of Ram Spermatozoa during Liquid Storage and Options for Improvement

Semen preservation is an essential component of reproductive technologies, as it promotes genetic gain and long-distance semen transport and multiplies the number of ewes able to be inseminated per single ejaculate. However, the reduced temperature during cold storage at 5 or 15 °C inflicts sub-leth...

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Bibliographic Details
Published in:Animals (Basel) 2022-01, Vol.12 (3), p.244
Main Authors: Rizkallah, Natalie, Chambers, Caitlin G, de Graaf, Simon P, Rickard, Jessica P
Format: Article
Language:English
Subjects:
Antioxidants
Artificial insemination
Biosafety
Cholesterol
Cold
Cold storage
Cooling
Cryopreservation
egg yolk
Fertility
Lipid peroxidation
Lipids
Melatonin
Metabolism
Motility
Peroxidation
Preservation
Reproduction (biology)
Reproductive technologies
Review
Room temperature
Semen
semen preservation
Sheep
Sperm
Spermatozoa
Survival
viability
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Summary:Semen preservation is an essential component of reproductive technologies, as it promotes genetic gain and long-distance semen transport and multiplies the number of ewes able to be inseminated per single ejaculate. However, the reduced temperature during cold storage at 5 or 15 °C inflicts sub-lethal damage to spermatozoa, compromising sperm quality and the success of artificial breeding. New and emerging research in various species has reported the advantages of storing spermatozoa at higher temperatures, such as 23 °C; however, this topic has not been thoroughly investigated for ram spermatozoa. Despite the success of storing spermatozoa at 23 °C, sperm quality can be compromised by the damaging effects of lipid peroxidation, more commonly when metabolism is left unaltered during 23 °C storage. Additionally, given the biosafety concern surrounding the international transport of egg-yolk-containing extenders, further investigation is critical to assess the preservation ability of synthetic extenders and whether pro-survival factors could be supplemented to maximise sperm survival during storage at 23 °C.
ISSN:2076-2615
2076-2615
DOI:10.3390/ani12030244