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RISS 인기검색어
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- 저자 : 연정웅(J . W . Youn) (검색결과 2 건)
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돼지의 분만월 및 산차가 (産次) 번식능력에 미치는 영향
연정웅 ( J . W . Youn ) 한국축산학회 1984 한국축산학회지 Vol.26 No.2
This study was aimed to investigate the effect of farrowing month and parity on reproductive performance in Hog. These data analyzed were collected from 1,344 heads of Landrace, Large Whine, Duroc, Hampshire and their crossbred dams farrowed from June, 1981 to May, 1982 at the experimental farm of Yeon Am Junior College stationed at Sung Whan. They were divided into 84 groups of 16 dams each according to farrowing month and parity their litter size at birth, number of still birth, number of initial suckling pigs, survival rate to weaning, number of weaning pigs, interval from weaning to estrus and number of dams remated were observed. The results obtained were as follows; 1. Litter size was significantly (P 0.05) largest for the 4th parity while the effect of farrowing month was not significant. 2. Numbers of still-birth per 16 litters of the 6th parity and October farrowing were largest while the effect of farrowing month and parity on the still-birth were not significant. 3. The effect of furrowing month and parity on the number of initial suckling pigs per litter was all significant at 1% level. 4. The survival rate to weaning of the 2nd parity and April furrowing was highest and the effect of furrowing month and parity on the survival rate to weaning were significant at 5% and 1% level, respectively. 5. The effects of furrowing month and parity on the number of weaning pigs per litter were all significant at 5% level. 6. Interval from weaning to estrus of March furrowing dams was significantly (P 0.05) shortest but the effect of parity on the interval from weaning to estrus was not significant. 7. Total number of dams remated per 16 litters of June furrowing was significantly (P 0.01) largest and that of March furrowing was smallest.
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미경산돈에서 교배전 자궁내 정액항원 주입에 의한 산자수 증가에 관한 연구
한기영(K . Y . Han),김창근(C . K . Kim),윤종택(J . T . Yoon),김형태(H . T . Kim),정영채(Y . C . Chung),서경덕(K . D . Seo),연정웅(J . W . Youn),이용우(Y . W . Lee) 한국축산학회 1988 한국축산학회지 Vol.30 No.9
This experiment was conducted to evaluate effect of a single intrauterine infusion of semen or seminal plasma at estrus before mating on subsequent litter traits of crossbred gilts. In addition, presence and level of early pregnancy factor activity (rosette inhibition titre, RITZ in serum of treated gifts and in vitro immunosuppressive activity of these antigens from boars used were tested immunologically to support the results in this experiment. The results obtained were as follows: 1. Semen-infused gifts significantly had a larger litter size (11.4) at birth than controls (9.6), but no significant differences were detected between others. 2. There was a tendency toward increased total pigs born alive, litter weight at birth and number of pigs suckling in antigen-infused gifts, but the differences between treated-gifts and controls were not statistically significant. 3. EPF activity (RIT) before and after mating in previously infused-gifts was 10.7±2.8 in the serum of nonpregnant gifts and 19.3±3.8 in the serum of pregnant gifts. RIT $gt; 14 could be considered evidence of presence of EPF in pregnant gifts. 4. Seminal plasma infusion before mating induced on obvious rise of RIT. RIT at 24 h and 48 h after mating was much higher (18-23 and 21-22) :in semen-and seminal plasma-infused gifts than in controls. RIT at 24 h after mating was found to be positively correlated (r=0.84) to litter size born in 6 gifts. 5. Dialyzed seminal plasma from 4 boars was significantly immunosuppressive at a concentration of 500 ㎍/㎖ than controls and degree of immunosuppression varied among individuals when the concentrations was under 500 ㎍/㎖. Undialyzed semen samples from 3 boars resulted in loss of immunosuppressive activity. These results indicate that infusion of gifts with semen at estrus before mating can be improved reproductive efficiency because of more litter size at birth and sukling pigs than controls and that these antigens had immunosuppressive potential of antilymphocyte serum and immunosuppressive activity to porcine lymphocytes that generate an immune response.
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