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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

The following reviews were included in a volume published in honour of T. Bonadonna. The papers abstracted appear in the appropriate sections of ABA.Laing, J.A. Artificial insemination and the prevention of disease : 149-151.Macpherson, J.W. The protection of semen from contamination :...

Publisher
Bologna, Edizioni Agricole.,
Citation
Riproduzione animale e fecondazione artificiale., 1972, pp 331 pp.
Abstract

Author(s)
Niwa, T.
Citation
Korean Journal of Animal Reproduction, 1979, 3, 1, pp 26-29
Abstract

Author(s)
Niwa, T.
Citation
Japanese Journal of Swine Husbandry Research, 1974, 11, 2, pp 121-125
Abstract

Frozen boar semen from 12 boars (Landrace, Large White and Hampshire) were used to inseminate 23 sows or gilts of the same breeds. The ♀♀ were inseminated twice, at 1 and 11/2 days after the onset of standing oestrus. No difference was detected in the quality of semen used for sows which did or did ...

Author(s)
Niwa, T.; Hashizume, T.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1982, No. 3, pp 24-30
Abstract

A review.

Author(s)
NIWA, T.
Publisher
The Hague,
Citation
Proceedings. 4th Int. Congr. Anim. Reprod., The Hague, 1961, 1962, 1, pp 83-115
Abstract

In the new type of artificial vagina a spiral ring, similar in size and shape to the spiral part of the boar's penis, surrounds the rubber inner tube, giving the proper pressure when the penis is being introduced, and tending to prevent backflow of the semen. Use of the new type of vagina did not...

Author(s)
NIWA, T.; MIZUHO, A.; SOEJIMA, A.
Publisher
Chiba.,
Citation
Bull. natn. Inst. agric. Sci., Tokyo, 1959, 18, pp 45-56
Abstract

The method used by the Japanese in the artificial insemination of pigs is described. Practical details are given about the properties of boar semen, its collection, dilution and storage, and the technique of insemination.
The av. duration of ejaculation in the boar is 6 mins. 36 secs. The part of...

Author(s)
NIWA, T.
Publisher
Chiba-City, Japan : National Institute of Agricultural Sciences,
Citation
Artificial insemination with swine in Japan., 1958, pp 13 pp.
Abstract

The optimum concentration of sodium citrate in the diluent was 3. 0-3. 5% when it involved 11 molecules of combined water and 2. 5-3. 0% when it involved 2 molecules. It was approx. 0. 1 mol in concentration and 1. 015 in specific gravity in both cases. The freezing point depression most suitable...

Author(s)
NIWA, T.; MIZUHO, A.; SOEJIMA, A.
Citation
Bull. natn. Inst. agric. Sci., Tokyo, Ser. G, 1960, 19, pp 25-38
Abstract

The concentration of milk powder suitable for the survival of boar spermatozoa was 10% for whole milk and 8% for skim milk. There was no difference between whole and skim milk powder in their effect on sperm survival, but the latter gave better sperm visibility under the microscope and was cheaper. ...

Author(s)
NIWA, T.; MIZUHO, A.; SOEJIMA, A.
Citation
Bull. natn. Inst. agric. Sci., Tokyo, Ser. G, 1960, 19, pp 39-51

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