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신원집,김희석,서국성,김종계 ( Won Jib Shin,Hee Seok Kim,Kug Sung Suh,Jung Key Kim ) 한국축산학회 1980 한국축산학회지 Vol.22 No.6
This study was conducted to investigate the rate of multiple births in Korean native cow treated with subcutaneous injection of 1000IU PMS on day 17 of estrus cycle followed by an intravenous injection of 1000IU HCG on the onset day of estrus. The results obtained were as follows: 1. The rate of normal estrus exhibited was 78.9% in the lst m 2nd parity cows and increased as the parity increased. 2. The mean duration from PMS Treatment to the onset of estrus was 4.3 days grad was no significant difference among tire parities. 3. The mean number of matured follicles per cow treated was 1.2 and was no significant difference among the parities. 4. The rates of multiple birts were 4.8%, 40.0% and 23.9% for 1st to 2nd parity, over 3rd parity and over all, respectively, and were increased as the parities increased.
한우 다태분만 ( 多胎分娩 ) 유도를 위한 호르몬 처리수준 결정시험
김희석,서국성,김종계,신원집 ( Hee Seok Kim,Kug Sung Suh,Jung Kye Kim,Won Jib Shin ) 한국축산학회 1980 한국축산학회지 Vol.22 No.6
This study was carried out to determine the dosage of PMS for increasing the rate of multiple births in Korean native cow. Animals were injected subcutaneously with 50G, 750, 1,000IU PMS, respectively on day 17 of the oestrus cycle followed intravenously by 1000IU HCG at the onset of the next oestrus (Only 1-2 Graffian follicles). The results obtained were as follows; 1. Most. of the cows treated witty 1000IU PMS exhibited normal oestrus behaviour(87.5%) and those treated with 500ICT revealed the poorest oestrus rate (56.6%) among the treatments. 2. Duration from the injection time with PMS to the onset of estrus was 4.8 days and was no significant difference among the treatments of various dosages of PMS. 3. The mean number of matured follicles per cow treated with 1000IU PMS was 1.3.
돼지의 임신기간과 산자성비에 미치는 몇가지 환경요인의 효과
김용환(Yong Hawn Kim),신원집(Won Jib Shin),백동훈(Dong Hoon Baik) 한국축산학회 1988 한국축산학회지 Vol.30 No.7
This study was carried out to investigate the effect of breed, parity, year, season of farrowing and age of sire on gestation length and sex ratio at birth in swine. The data were obtained from 831 litters of Duroc, Hampshire, Landrace and Yorkshire raised at the Swine Breeding Station, National Livestock Cooperatives Federation from 1983 to 1987. This results obtained are summarized as follows: 1. Gestation length was shortest (113.5±.022 days) in Hampshire and longest (115.6±0.16) in Yorkshire (p$lt;0.01). Sex ratio showed no significant differences among the breeds studied. 2. Gestation length was 114.5±0.19 days for the 1st parity, which was significantly different from 115.7±0.14 days for the 7th parity only in Landrace. 3. Gestation length was significantly different among years in Landrace (p$lt;0.01) and Yorkshire (p$lt;0.05). 4. Effect of season on gestation length was significant in Landrace and tended to be longer in spring and summer than others. 5. Gestation length appeared to be longer as the age of the sire increased in Yorkshire.
Influence of Pig Embryos on Uterine Growth
Shin, Won Jib,Wu, M. C.,Dziuk, P. J. 全北大學校 附設 畜産開發硏究所 1988 畜産開發硏究報告 Vol.2 No.-
子宮의 成長에 대한 胚의 影響을 알아보기 위하여 한쪽 子宮角에만 姙娠시킨 末經産豚의 姙娠된 子宮角과 姙娠안된 子宮角의 길이, 무게 및 직경을 北較하였다. 成熟前 암돼지 82頭를 5個月令에 한쪽 卵巢를 除去하였고 또 卵巢를 除去한쪽의 子宮角과 子宮體 接合部位를 結??하였다. 이러한 末經産豚을 種付시켜서 임신 9, 12, 15, 21 24 및 27 日로 무작위로 배치하여 한쪽 子宮角에 姙娠된 末境産豚의 姙娠된 쪽의 子宮角과 姙娠안된쪽의 子宮角간의 子宮길이, 무게, 직경의 絶對差와 北를 分析하였다. 그 結果 姙娠된쪽의 子宮角은 반대편의 姙娠안된 子宮角보다 姙娠 18日에는 40% 더 길었고 姙娠 27日까지로 계속 40% 더 길었으며 姙娠15日과 27日사이에 姙娠된 쪽의 子宮角은 子宮무게와 직경이 直線的으로 增加하였다(P<0.01). 胚는 姙娠18日頃에 子宮角의 길이, 무게 및 직경을 현저히 增加하게 하였으나 그 以前에는 그렇지 않았다.
申源執,白東勳,羅昇煥 全北大學校 1984 論文集 Vol.26 No.-
A study was conducted to find out effects of calving season, parity, sex, birth type, sire, and location on gestation length in Korean native cow. The least square means were estimated from 192 cows raised at general farms in Chunchun-Myun and Sanseo Myun, Jangsu, Chonbuk from 1981 to 1983. The results obtained are as follows: 1. The least square mean of gestation length of Korean native cow was 283.9 days. 2. There was no significant difference in gestation length among seasons, but the cows calved in spring and summer tended to maintain longer gestation than the cows calved in fall or winter. 3. The effect of parity also showed no significance, but the gestation length was increased as the parity progressed and was gradually decreased after 5th parity. 4. The effect of the sex of the fetus was not significant, but male calves were carried two days longer than females. 5. The effect of birth type showed signicant differences at the 5% level. Twin calves were carried about 5 days shorter than single calves. (p<0.05) 6. The effects of sire and location were not significant, but there were about 10 day differences amo-ng sires and 9 day differences between locations.