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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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Related references

Uchida, T.A.; Mori, T.; Oh, Y.K., 1984: Sperm invasion of the oviducal mucosa, fibroblastic phagocytosis and endometrial sloughing in the Japanese greater horseshoe bat, Rhinolophus ferrumequinum nippon. In the Japanese greater horseshoe bat, Rhinolophus ferrumequinum nippon, a vast number of spermatozoa invade the oviducal epithelial cells of the caudal isthmus and become concentrated in the endometrial lamina propria of the bicornuate horns. The...

O.Y.K.; Mori T.; Uchida T.A., 1985: Spermiogenesis in the japanese greater horseshoe bat rhinolophus ferrumequinum nippon. In the Japanese greater horseshoe bat, R. ferrumequinum nippon, the nuclear ring formation in spermiogenesis is characterized by an early appearance of a dense subplasmalemmal matrix which originates from the inner leaflet of the plasma membrane n...

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Oh, Y.K.; Mori, T.; Uchida, T.A., 1983: Studies on the vaginal plug of the Japanese greater horseshoe bat, Rhinolophus ferrumequinum nippon. The vaginal plug of the Japanese greater horseshoe bat is composed of an outer, thick, hard and homogeneous layer originating from the stratum disjunctum of the vaginal mucosa and a thin, soft and opaque central core containing accidentally trappe...

Funakoshi K.; Fukue Y.; Tabata A., 1992: Tooth development and replacement in the japanese greater horseshoe bat rhinolophus ferrumequinum nippon. The dental formula of the deciduous teeth in Rhinolophus ferrumequinum nippon was i1/2 c1/1 p2/3.times.2=20. All the germs of deciduous teeth were present in the fetuses of 7-8 weeks. The deciduous teeth, exclusive of the p3, attained their maxima...

Funakoshi K.; Fukue Y.; Tabata S., 1989: Resorption of the deciduous teeth in the japanese greater horseshoe bat rhinolophus ferrumequinum nippon. Zoological Science (Tokyo) 6(6): 1198

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Oh, Y.K.; Mori, T.; Uchida, T.A., 1985: Prolonged survival of the Graafian follicle and fertilization in the Japanese greater horseshoe bat, Rhinolophus ferrumequinum nippon. After the mating season of the Japanese greater horseshoe bat in mid- or late October, only the right ovary maintained a single Graafian follicle throughout hibernation until early April. During this time the ovum was in prophase of meiosis I (res...