• Journal of Animal Environmental Science
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• v.18 no.3
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• pp.157-164
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• 2012

This study was conducted to investigate the effect of different farrowing space, narrow and wide, on the sow performances and piglet growth performances. The $1.5m^2$ of narrow farrowing space was determined as the size of farrowing crate. The $3.0m^2$ of wide space for farrowing sow was the same of farrowing pen to allow the behavior freedom of sow. Baby piglets in the wide farrowing space was protected from crushing of sow by installation of safety bar. The pregnant sows used in this study were stall-housed during gestation and moved to each farrowing spaces on 8 d before parturition. Feed intake, backfat thickness and body condition score of sow were not affected by both farrowing spaces. However, the changes in backfat thickness and body condition score between farrowing and weaning in wide farrowing space were lower (p<0.05) than in narrow farrowing space. The return to estrus of sow was remarkably decreased in wide farrowing space compared to sows in narrow farrowing space. The lower number of stillbirth and higher mortality of piglets were observed in wide farrowing space. From the results, although wide farrowing space could be practically acceptable in terms of sow performances, possible cause of mortality of piglets should be scrutinized through observation of piglet and sow behaviors.

• Journal of Practical Agriculture & Fisheries Research
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• v.10 no.1
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• pp.91-99
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• 2008

Gnotobiotic piglets were routinely produced by hysterectomy. In this study, 22 pregnant miniature pigs (111th to 113th day of gestation) were used for hysterectomy. Before surgery, 14 pigs were insensibilizated by Ketamine 50^® plus CO₂ gas and 8 pigs by a slaughter pistol. The high level of Ketamine 50^® (0.09㎖/kg) was faster (146 vs 283 seconds) in surgery but the time taken for complete revival of one piglet was more prolonged (427 vs 64 seconds) than 0.03㎖/kg level. In hysterectomies with a slaughter pistol, surgery time was faster (470 vs 155 seconds) and the rate of alive piglets was higher (97.0 vs 83.8%) than in those with Ketamine 50^®. There were no problems in the rate of alive newborn piglets even when sows were hysterectomized at 3 days prepartum.

• Journal of Animal Environmental Science
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• v.13 no.2
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• pp.89-96
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• 2007

The aim of this study was to investigate the effect of parity and postpartum day on the behavior of nursing sows and their suckling piglets. Total 36 Landrace or Yorkshire sows(range of parity: 1 to 8) and their litters(range of litter size: 11 to 13 piglets) were assigned with sow's parity($1{\sim}2,\;3{\sim}4$ and 5 or more) and sow's postpartum days(day 1, 7, 14 and 21). The sows were housed in farrowing crates($0.6{\times}2.1m$) located in pens($2.4{\times}1.8m$) with totally perforated flooring. The sows and piglets were conventionally managed. The sows and their piglets behaviors were recorded during the 24 hour period at 1, 7, 14 and 21 days of postpartum. The obtained results from this study were as follows; 1. All the nursing sows in both group made attempts for lateral tying more than for other behaviors for whole days. The order of behavioral frequency at 1 and 3 weeks postpartum according the days of postpartum of sows was lateral tying, ventral lying, standing, sitting, feeding and drinking. The nursing sows at day 1 postpartum spent more time on sitting and standing than the sows at day 7 or more postpartum. 2. The parity of sows did not affected the lateral tying and sitting behavior of nursing sows, however the ventral tying are lowed in $1{\sim}2$ parity of sow group than the other parity group. Standing, feeding and drinking behavior of sows was not showed at any trends according to the sow's parity. 3. In the behaviors of suckling piglets, lying was increased and unsuccessful suckling was decreased until 21 days postpartum. Compared to the 7, 14 and 21 day postpartum, piglets at the 1 day postpartum spent less time for lying and walking, whereas they spent much more time for unsuccessful suckling. 4. According th the sow's parity, their piglets tying and unsuccessful suckling was lowed in $1{\sim}2$ parity sow group, however more than 3 parity sow's piglets behavior are not affected.

• The Korea Swine Journal
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• v.12 no.9 s.133
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• pp.136-139
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• 1990

자돈의 폐사는 대부분 생후3일 이내에 발생한다.이러한 손실을 줄이는 방법중에 하나가 저장에너지를 많이 가진 자돈을 분만시키고, 분만후에는 모돈에게 지방함량이 많은 젖을 분비하게 하여 육설율을 높이는 것이다.이와 같은 목적을 위해서는 임신말기에 고에너지 사료인 유지사료를 첨가하여 급여하는 것이 바람직하다

• Journal of Animal Science and Technology
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• v.45 no.6
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• pp.1061-1066
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• 2003

The present study was performed to investigate the effect of ozonation of the swine nursery building on indoor air quality and growth efficiency of the weanling piglets. Forty 21-day-old, cross-bred weanling piglets were housed in two ozonated or unozonated pens(10 males and 10 females per pen) for 3 wk alternately in a swine nursery building and this procedure was repeated three times. Ozone was generated using a commercial apparatus outside the nursery building and infused into the nursery building through a duct at a level of 0.03 ppm. Indoor concentrations of harmful gases were measured at 2-h intervals for a 24-h period per each 3-wk feeding trial. Indoor ammonia and carbon dioxide gas concentrations were reduced by the ozonation(P〈0.01) by 21% and 7%, respectively, compared with those of the control(unozonation), although hydrogen sulfide concentration was not affected by the treatment. However, the weight gain, feed intake and feed/gain of the piglets did not change due to the ozonation. Results suggest that ozonation of the swine nursery building is effective for improving the indoor air quality without affecting the production efficiency of weanling piglets.

• Journal of Animal Environmental Science
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• v.1 no.2
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• pp.137-144
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• 1995

This experiment was conducted to determine the effects of non-climatic environmental factors on growth performances and behavioural patterns of weanling pigs. Three hundred and sixty weanling pigs were contained and carried out with three levels of spaces per pig(0.18, 0.23 and 0.30$m^2$) and three different numbers of pigs per pen(15, 20 and 25 pigs) up to 30kg body weight. Designed by using a 3 $\times$ 3 factorial arrangement(three levels of spaces $\times$ three different numbers of pigs). This experiment investigated the effects of main factors and the relationship between each factors. The result of this experiment were summarized as follows ; 1. The reduction of floor space caused the reduction of feed/gain in the weanling pigs. Pigs responded with the increased feed intake(p<0.01) and with no change in body weight gain. 2. There were no significant differences in the body weight gain and feed/gain in weanling pigs by changing group sizes, but group size affected the feed intake significantly(p<0.01). 3. Space allowance affected the behavioural patterns significantly(p<0.01) of weanling pigs. The reduction of floor space caused the increment of aggressive behaviour and weanling pigs responded with the decreased resting, non aggressive social and play behaviour. 4. There were no significant differences in the resting, eating, aggressive and non aggressive social behaviour in weanling pigs by changing group sizes, but the large group size caused the reduction of play behaviour in the weanling pigs(p<0.01). 5. Therefore we concluded that weanling pigs require 0.23$m^2$ per pig and 20~25 pigs per pen for the better environment condition.

• Journal of Animal Science and Technology
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• v.47 no.4
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• pp.691-696
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• 2005

Suckling piglets must avoid positions with high air velocity because they don’t have hypodermic fat. Therefore this study examined the effects of air ejection on the behaviors of sows and their piglets. Compressed air was released for 5s at 5s intervals between floor and udder of sows only when they were standing or sitting. Sixteen multiparous crossbred(Landrace×Yorkshire) sows and their piglets were used. Behaviors of sixteen sows and their piglets were recorded for 4 days postpartum, using the LED lamp(wavelength:950nm), CCD camera(Samsung SDC-411), multiplexer(Samsung SDM-080), and time lapsed VCR(Samsung SRV-30). The videotapes were scanned every 30s to obtain an instantaneous behavioral sample. The sow’s standing and sitting rates between control group(CG) and air ejection group(AEG) were not significantly different(P＞0.05). This means that air ejection does not affect the behavior of sows. Frequency of the suckling piglets’ behaviors closely related to the crushing by sows was lower in AEG than in CG(P＜0.05). These results suggest that air ejection may be available for reduction of the crushing of suckling piglets by sows.

• Korean Journal of Veterinary Research
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• v.37 no.2
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• pp.417-423
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• 1997

돼지 생식기 호흡기 증후군 바이러스의 nucleocapsid와 반응을 하는 SDOW17 단크론항체를 이용하여 중성 포르말린에 고정시킨 자연감염된 포유자돈의 폐장에서 면역조직화학법을 이용하여 돼지 생식기 호흡기 증후군 바이러스 항원을 확인하였다. 서울대학교 수의과대학 병리학교실에 의뢰된 포유자돈들 중에서 병리조직학적으로 폐장에서 간질성 폐렴이 관찰된 포유자돈 7두를 임의로 선택하여 본 실험을 실시하였다. 간질성 폐렴의 병변으로 많은 수의 대식세포 침윤을 동반한 폐포벽 두께의 증가와 제II형 폐포세포의 비후가 관찰되었다. 검사한 7두 포유자돈중에서 6두에서 돼지 생식기 호흡기 증후군 바이러스에 대한 항체를 enzyme-linked immunosorbent assay에 의해 확인하였다. SDOW17 단크론항체를 이용한 면역조직화학염색과 간질성 폐렴의 대식세포에서 돼지 생식기 호흡기 증후군 바이러스의 항원을 검출하였고, 항원은 (주로)대식세포의 세포질에서만 진한 갈색의 양성반응이 관찰되었다. 이상 검사결과 돼지 생식기 호흡기 증후군 바이러스는 폐장의 간질과 폐포강에 분포되어 있는 대식세포에서 주로 증식하는 것으로 판명되었다. 본 실험에서 사용한 면역조직화학법은 돼지 생식기 호흡기 증후군 바이러스 감염여부를 바이러스 분리 또는 혈청검사 없이 진단하는데 사용할 수 있는 유용한 진단방법으로 판명되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1162-1165
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• 2012

어미로부터 생후 21일령(또는 28일령)에 젖을 때는 어린 자돈들은 면역력이 약하여 통상 폐사율이 30~40%까지 치솟는 등 자돈 관리가 국내 양돈 농가의 가장 큰 문제 중 하나로 인식되고 있다. 본 논문에서는 이러한 양돈 농가의 문제를 해결하기 위하여 자돈사(새끼돼지 축사)에 카메라와 마이크를 설치하고 획득된 영상과 소리 정보를 이용하여 자돈들을 모니터링하는 시스템을 제안한다. 제안된 시스템은 실시간으로 유입되는 영상과 소리 스트림 데이터로부터 각각 움직임 벡터와 평균 피치 값을 추출하여 이미 설정된 정상 상황의 임계치 값을 넘는 순간부터를 불특정 이상 상황이라 판단한다. 실제, 경상남도 함양군의 한 돼지 농장에 A/V 센서 기반의 실험 환경을 구축하고 2012년 6월 한 달간의 이유자돈 돈사의 모니터링 데이터 셋을 취득하였고 전반기 15일간의 데이터 셋을 이용하여 자돈사 모니터링 시스템의 프로토타입을 설계 구현하였으며 후반기 15일간의 A/V 스트림 데이터로는 검증 실험을 수행하였다.

• Korean Journal of Animal Reproduction
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• v.27 no.2
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• pp.97-102
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• 2003

This study was carried out to find out PSS(Porcine Stress Syndrome) with the PSE(Pale, Soft, Exudative) in different piglets. These experiments were accomplished with the aid of PCR-RFLP(Polymerase Chain Reaction-Restriction Fragment Length Polymorphism). The samples were collected and examined from umbilical cord blood of piglets of Yorkshire, Landrace and Crossbred. And then, the PCR products were digested by restriction enzyme, Hha I. The results obtained were as follows; The PCR products of the blood genomic DNA of ryanodine receptor gene were length of 1 .8kb in umbilical cord blood. Normal type(NN), heterozygous type(Nn) and recessively homozygous type(nn, PSS) as a result of digestion of restriction enzyme, Hha 1, were 90.0%, 10.0% and 0.0% in Yorkshire piglets, 76.2%, 19.0% and 4.8% in Landrace, 69.1%, 23.8% and 7.1% in crossbred, respectively. As already showing the above results, the blood from piglets umbilical cord can be availably used for the determination of genotypes of PSS because of easiness of blood collection without stress in live piglets.