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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

A semen extender (ID-2) containing N-tris (hydroxymethyl) methyl-2-aminoethane sulphonic acid 1.2 g, anhydrous dextrose 3.2 g, tris hydroxymethyl aminomethane 0.36 g, citric acid 0.076 g, sodium lauryl sulphate 40 mg, caffeine sodium benzoate 8 mg, amikacin sulphate 4 mg dibakacin sulphate 4 mg and ...

Author(s)
Niwa, T.; Hashizume, T.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1982, No. 3, pp 31-38
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

Semen from 6 Landrace boars was frozen in pellets, and was compared with semen collected from 3 Large White and 3 Landrace boars, diluted with a skim milk-glucose extender, and stored unfrozen. Sperm motility was low immediately after thawing, rose to peak levels 30-60 min. later, and then...

Author(s)
Niwa, T.; Hashizume, T.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1982, No. 3, pp 1-8
Abstract

Thiamine, caffeine, catalase and PGF were added to the thawing solution. Thiamine and catalase did not affect sperm survival compared with an unsupplemented control group, although the addition of Tris plus citric acid, with or without PGF, or caffeine sodium benzoate gave a slower loss of...

Author(s)
Niwa, T.; Hashizume, T.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1982, No. 3, pp 9-15
Abstract

Frozen boar semen stored in plastic straws, imported from Canada and the USA, was compared with that produced in Japan for sperm viability and acrosome abnormalities. The US and Canadian semen gave 63±5 and 73±3 pellets per straw resp., 0.12 and 0.13 ml semen per pellet, and 3210±90 × 106 and...

Author(s)
Niwa, T.; Hashizume, T.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1982, No. 3, pp 16-23
Abstract

Regression equations are given for estimating sperm concentration from spectrophotometer readings, and a table is given from which sperm concentration in diluted semen can be read off against spectrophotometer reading.

Author(s)
Niwa, T.; Hashizume, T.; Shibata, M.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1981, No. 2, pp 66-78
Abstract

The progesterone concentrations were determined in 5 cows in oestrus, 5 cows in the luteal phase of the cycle, and 16 cows at 20-62 days after mating. In blood plasma, morning milk and evening milk, the progesterone concentration (±standard deviation) averaged 0.63±0.13, 2.8±0.2 and 3.4±0.6 ng/ml...

Author(s)
Hashizume, T.; Niwa, T.; Kimura, H.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1981, No. 2, pp 60-65
Abstract

Sows were injected with PGF analogue on days 111, 112 or 113 of pregnancy in an experiment involving 81 treated and untreated animals. The level of progesterone in the blood was determined in 4 treated sows. Compared with untreated controls, treatment significantly advanced the date of...

Author(s)
Niwa, T.; Suginome, Y.; Hashizume, T.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1981, No. 2, pp 48-59
Abstract

Biopsies were carried out at intervals of 2-3 days in cycling and pregnant sows. The degree of stratification of the vaginal epithelium is given in 4 graphs. It increased greatly at oestrus. During pregnancy, the vaginal epithelium had 3-4 layers of cells.

Author(s)
Hayashi, T.; Niwa, T.
Citation
Bulletin of the Laboratory of Artificial Insemination, Iwate University, 1981, No. 2, pp 43-47

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