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Prostaglandin $F_2\alpha$ 투여에 의한 돼지의 분만유기에 관한 연구 II. 유기분만자돈의 건강과 발육
연정웅,정길생 한국동물번식학회 1979 Reproductive & developmental biology Vol.3 No.2
This experiment was conducted to clarity the possibility of practical use of farrowing inductionin sow by the administration of prostaglandin F2$\alpha$. For this experiment, total 320 heads of pregnant sow and its piglets were used. The reproductive characteristics of artificially farrowed sow and, health and growth state of piglets were estimated. The results obtained in this experiment were summarized as following: 1. No significant difference were observed between naturally and artifically farrowed sow in several aspects such as the rate of dystocia, length of farrowing, farrowing intervals from piglet to piglet. 2. significant (P<0.05) differences were observed between naturally and artificially farrowed sow in intervals from weaning to estrus. However, there were no significant differences among those of 5, 7.5 and 10mg treated group. 3. There were no differences in number of stillbirth, immature birth and alive piglets at 3 weeks age per litter were observed. 4. Similar birth weight, weaning weight, daily gain and rearing rate of piglets were obtained from both naturally and artificially farrowing.
$PGF_2\alpha$ 투여가 초산돈의 혈중 Progesterone 농도와 발정재귀일수에 미치는 영향
연정웅,김정우 한국동물번식학회 1994 Reproductive & developmental biology Vol.18 No.2
In order to examine the effects of PGF2$\alpha$ on intervals from weaning to estrus and serum progesterone levels seventeen crossbred primiparious sows were randomly alloted to two groups. One group was injected intramuscularly on the day of weaning with 10 mg PGF2$\alpha$ (10mg/2ml, Lutylase). The other group was treated with saline as a control. Serum progesterone concentrations were determined at 24 hour intervals for 12 days after weaning. A serum progesterone level in PGF2$\alpha$-treated group was reached to the lowest level(1.19$\pm$0.38 ng/ml) on day 3 after weaning and remained low(1.26~1.43ng/ml) thereafter. Whereas, the control group showed the lowest level of progesterone on day 4 after wearing, then showed a rapid increase up to 5.02$\pm$0.38ng/ml on day 8 and a rapid decrease was followed. The PGF2$\alpha$ treated group showed an interval from weaning to estrus(5.2$\pm$0.8 days) approximately 2 days shorter than the control(7.4$\pm$3.0 days)(p<0.05).
임신전 불임 수퇘지 종부 및 무정자정액 주입에 의한 미경산돈의 산자수 증가에 관한 연구
연정웅,김동덕,정흥우,성환후 한국동물생명공학회(구 한국동물번식학회) 2003 Reproductive & developmental biology Vol.27 No.1
본 연구는 초임전 임신항원인자로 정소상체제거 및 정관절제 수퇘지를 종부하거나 무정자 정액을 사용하였을 때 미경산돈의 번식향상 효과를 조사하기 위하여 수행하였다. 임신항원인자의 주입에 따른 번식성적을 조사하기 위하여 7∼8개월령의 교잡종 미경산돈을 160두 공시하였다. 시험돈은 4개의 시험군으로 나누었으며, 처리는 A처리구는 정소상체제거 교배, B처리구는 무정자 정액, C 처리구는 정관절제 교배, D처리구는 무처리하여 각구당 40두를 배 치 하여 완전임의배치법으로 하였다. 미경산돈의 초임시 총산자수는 A, B, C 및 D 처리구가 각각 10.05, 10.44, 11.63 및 9.97두로 가장 많은 처리구는 정관절제교배구인 C처리구였다(P<0.05). 비경산돈의 생존산자수는 총산자수와 유사하였다. 특히 C처리구는 10.70두로 9.12 및 9.11 두인 A군과 무처리보다 많았다(P<0.05). 반면 정관절제군과 무정자 처리구간에는 총산자수 및 생존산자수에서 차이가 없었다. 한편 미경돈의 혈중 progesterone 농도는 교배후 6일에서 C처리구가 다른 처리구보다 유의성 있게 높았다. 그러나 8일 이후에는 다른 처 리구보나 낮았다. 한편 혈중 cortisol농도는 처리간에 통계적인 유의성이 없었다. 이상의 시험결과를 볼 때 임신전 정관절제 수퇘지나 무정자정액을 항원으로 주입으로 미경산돈의 산자수 증가에 의한 번식효율을 증진을 확인할 수 있었다. 미경산돈의 산자수 증가를 위한 항원으로 정관절제 수퇘지나 무정자정액을 자궁에 주입하는 방법이 효과가 있다고 할 수 있다. This study was conducted to investigate the effect of infusion of sterile boar and their semen as pregnancy antigen factor for improvement of production in gilts. We observed 160 gilts between 7 to 8 months of age that were divided into 4 treatment groups vie. A group-epidimetomized boar, B group-no sperm semen infusion, C group-vasectomized boar, and D group-control in a completely randomized design. The number of total pigs born(NT) of A, B, C, and D groups were 10.05, 10.44, 11.63, and 9.97 pigs, respectively(P<0.05). And the NT of C g.cup was the highest among treatment. The number of live pigs born(NB) was similar to NT The NB of C group (10.70) was higher than that of A(9.12) and control(9.11)(P<0.05). However, there was not significant between B and C groups. The progesterone concentration of C group was the highest compare to other group at the 6th day after breeding. However, the progesterone concentration of C was lower than other groups after 8th day. There were not significant among cortisol of A, B, C and D groups. According of the results of this study, the infusion with vasectomized boar and semen at estrus before gestation can be improved reproductive efficiency because of more litter size in gilts.
돼지의 번식능력과 특성에 미치는 산차 ( 産次 )의 영향과 그 번식성간의 상관에 관한 연구
연정웅,나기현 ( Jeong Woong Youn,Ki Hyun Ra ) 한국축산학회 1981 한국축산학회지 Vol.23 No.1
This study was carried out to clarify effect of parity on reproductive performance and characteristics, and relationship between reproductive traits in swine. Total 320 heads of pregnant two-breed crosses between Landrace and Large Yorksshire or Duroc or Hampshire were used and divided equally into two groups; the lst to 3rd parity and the 4th to 6th parity, and reproductive performance or characteristics of each group was investigated. Also, the relations between reproductive traits were estimated on the basis of data from 320 litters (3,497 pigs farrowed and 2,800 pigs 30-day weaned). The results obtained are as follows: 1. Total length of furrowing and interval of furrowing from pig to pig of the 1st to 3rd parity were 5.26±2.89 hours and 18.98±8.13 minutes, and the length and interval of the 4th to 6th parity were 6.23±2.79 hours and 21.10±10.34 minutes respectively, and the length and interval of the 4th to 6th parity were significantly (5% to 1 % level) longer than that of the 1st to 3rd parity. 2. Average litter size, number of initial suckling pigs and number of survival pigs at a weeks age of the 4th to 6th parity were significantly (P $lt; 0.01) larger than those of the 1st to 3rd parity. 3. Number of weaning pigs per litter of the 1st to 3rd parity was significantly (P $lt; 0.05) smaller than that of the 4th to 6th parity. 4. Survival rates of piglets during lactation of the 1st to 3rd parity and the 4th to 6th parity were 90.78±9.21, and 87.86±12.12%, and the 1st to 3rd parity showed significantly (P $lt;0.05) better survival rate than the 4th to 6th parity. 5. An increase in litter size was significantly (5% to 1% level) correlated with a decrease in birth weight (r = -0.13), survival rate during lactation (r = -0.50) and interval of farrowing from pig to pig (r = -0.12). 6. An increase in number of initial suckling pigs was significantly (P $lt;0.01) correlated with an increase in number of survival pigs at 3 weeks age (r = 0.76), a decrease of weaning pig weight (r = -0.23) and a daily body weight gain during lactation (r = -0.21). 7. Survival rate of piglets during lactation was significantly (5% to 1% level) correlated with birth weight (0.14), number of weaning pigs (0.15) and interval from weaning to conception (0.22).