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Sperm storage in the oviduct of the japanese greater horseshoe bat rhinolophus ferrumequinum nippon


, : Sperm storage in the oviduct of the japanese greater horseshoe bat rhinolophus ferrumequinum nippon. Journal of the Faculty of Agriculture Kyushu University 27(1-2): 47-54

In the Japanese greater horseshoe bat, R. ferrumequinum nippon, copulation took place in mid- or late Oct. and ovulation was induced early in April. The principal site of sperm storage was the caudal isthmus of the oviduct, lined with non-ciliated epithelium, although moderate or small numbers of spermatozoa were found also in the intramural part of the uterotubal junction. The intact spermatozoa in contact with the microvilli or epithelial cells in folds in the storage sites appeared normal, while some degenerated spermatozoa were eliminated by extensive epithelial engulfment throughout the period of storage; leukocytic phagocytosis rarely occurred and was confined to the period just before or after ovulation.

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