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Sperm storage tubule in quail

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    Sexual Reproduction in Animals and Plants pp Cite as. The capability for sperm storage in the female genital tract is frequently observed in vertebrates as well as in invertebrates. Because of the presence of a system that maintains the ejaculated sperm alive in the female reproductive tract in a variety of animals, including insects, fish, amphibians, reptiles, birds, and in mammals, this strategy appears to be advantageous for animal reproduction. Although the occurrence and physiological reasons for sperm storage have been reported extensively in many species, the mechanism for sperm storage in the female reproductive tract has been poorly understood until recently. In this chapter, we report our recent findings on the mechanism of sperm storage in avian oviducts, especially data obtained from the Japanese quail Coturnix japonica , as an experimental model.
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    Specific Mechanism of Sperm Storage in Avian Oviducts

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    Development of sperm storage tubules in the quail during sexual maturation

    Try out PMC Labs and tell us what you think. Learn More. The ability to store sperm in the female genital tract is frequently observed in vertebrates as well as in invertebrates. Because of the presence of a system that maintains the ejaculated sperm alive in the female reproductive tract in a variety of animals, this strategy appears to be advantageous for animal reproduction.
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    A unique mechanism of successful fertilization in a domestic bird

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    Because of the presence of sperm storage tubules SSTs in the utero-vaginal junction UVJ in the oviduct, once ejaculated sperm enter the female reproductive tract, they can survive for a prolonged period in domestic birds; however, the specific mechanisms involved in sperm maintenance within the SST remain to be elucidated. When UVJ extracts were subjected to size-exclusion column chromatography, we obtained fractions that extend sperm longevity in vitro. When the ejaculated sperm were incubated with either purified TF or ALB, sperm viability increased after 24 h. These results indicated that oviductal TF and ALB are involved in the process of sperm storage in SSTs and may open a new approach for technological improvement to prolong sperm longevity in vitro. Distribution of spermatozoa in the oviduct and fertility in domestic birds.
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