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Abstract

AI with semen from 2 Landrace boars that had been stored for 22.6 years resulted in the birth of 10 and 9 piglets, respectively, from 2 sows 115-116 days later. AI with semen from another 3 boars that had been stored for 25-26 years did not result in pregnancy.

Author(s)
Niwa, T.; Hashizume, T.; Mori, A.; Matsubara, E.; Yoshida, S.; Kitazume, K.; Matsumoto, N.
Publisher
Japanese Society of Swine Science, Atsugi-shi, Japan
Citation
Japanese Journal of Swine Science, 2003, 40, 4, pp 186-194
Abstract

In order to determine the correct amount of semen to be used in the artificial insemination of pigs, 283 experiments with 232 sows were made. The volume of semen normally necessary for successful conception was estimated to be 50 em.3; where the sperm concentration was high and the semen had been...

Author(s)
ITO, S.; NIWA, T.; KUDO, A.
Citation
Japanese Journal Zootechnical Science, 1949, 19, pp 113
Abstract

THE minimum quantity of semen normally required for conception is 50 cm.3, but if the semen is of high sperm density and stored for less than 24 hrs., 30 cm.3 will be sufficient. The number of spermatozoa necessary for conception is, in the case of under 24 hours' storage, 5 billion; when stored...

Author(s)
ITO, S.; NIWA, T.; KUDO, A.
Citation
Research Bulletin. zootech. Exp. Stn., 1948, 55,