공기분사가 모돈과 포유자돈의 압사 관련 행동에 미치는 영향

전중환,연성찬,장홍희,Jeon, J.H.,Yeon, S.C.,Chang, H.H. 한국축산학회 2005 한국축산학회지 Vol.47 No.4

본 연구는 모돈이 서있거나 앉아 있을 때 모돈의 배 밑에 공기를 분사하는 것이 모돈과 포유자돈의 압사 관련 행동에 미치는 영향을 규명하고자 수행되었으며, 공시동물로는 경산돈 16복과 포유자돈 179두가 분만 후 4일까지 이용되었다. 모돈의 행동을 관찰한 결과, 서있는 행동과 앉아있는 행동에 있어서 대조구와 공기분사구간에 차이가 없는 것으로 나타나 공기분사가 모돈의 행동에 영향을 미치지 않는 것으로 분석되었다. 반면에 압사와 밀접하게 관련 있는 4가지 포유자돈의 행동을 관찰한 결과 모돈의 뒤로 지나가는 행동, 모돈의 뒤에 서있는 행동, 모돈의 배 밑으로 지나가는 행동, 모돈의 배 밑에 서있는 행동 모두가 대조구에 비해 공기분사구에서 현저히 낮게 나타났다. 따라서, 모돈이 서있거나 앉아있을 때 모돈의 배 밑에 공기분사를 함으로써 모돈의 행동과 포유자돈의 건강에 영향을 미치지 않고 포유자돈의 압사 관련 행동을 억제하여 포유자돈의 압사를 효과적으로 방지할 수 있을 것으로 예상된다. 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.

돼지용 전자태그 개발을 위한 돼지 귀의 크기에 관한 연구

전중환,연성찬,김두환,장홍희,Jeon J.H.,Yeon S.C.,Kim D.H.,Chang H.H. 한국축산환경학회 2006 축산시설환경학회지 Vol.12 No.2

This study was carried out to investigate the relationship between the physical dimensions of ear and age for swine. The physical dimensions of ear and weight for twenty pigs were investigated on 1, 20, 40, 90, 120, and 150 days of age, respectively. The thickness of ear was measured at the upper, middle, and lower part of fore perimeter, and the middle and lower part of hind perimeter. The length of ear was measured for width and height. The thickness of ear increased rapidly from 1 day to 20 days of age, then it developed gradually after that period of time. The thickness at the lower part of fore perimeter increased most rapidly from 1 day to 20 days of age. In the length of ear, width increased gradually whereas height increased rapidly from 1 day to 90 days of age and then they almost did not. All the regression equations between the physical dimensions of ear and age were best represented by $Y=a+b\;X^{0.5}$. These results suggest that RFID has to be installed on the middle part of hind perimeter and an ID chip has to be installed on the lower part of fore perimeter.

산란계의 열환경별 특이음에 대한 음성학적 분석

전중환,연성찬,하정기,이승주,장홍희,Jeon, J.H.,Yeon, S.C.,Ha, J.K.,Lee, S.J.,Chang, H.H. 한국축산학회 2005 한국축산학회지 Vol.47 No.4

본 연구는 산란계가 적정 환경, 더운 환경 그리고 추운 환경에서 특이하게 내는 특이음을 분류한 후 이들을 음성학적으로 판별할 수 있는지를 규명하고자 수행되었다. 일반 발성음은 총 5가지 형태, 더위stress 특이음은 1가지 형태, 그리고 추위stress 특이음은 총 3가지 형태로 각각 나타났다. 기본주파수, 음의 강도, 음의 길이 및 포먼트에 대하여 열환경별 발성음간 유의차를 분석한 결과 모든 parameter에서 유의차가 인정되었으나, Discriminant 분석을 실시하였을 때 음의 길이, 제 1포먼트, 제 3포먼트 및 제 4포먼트가 다른 parameter들 보다 유용한 parameter로 나타났다. 이상의 결과들을 종합해 볼 때, 산란계는 열환경 변화에 따라 특이음을 내었으며, 이들 특이음은 기본주파수, 음의 강도, 음의 길이 및 포먼트 등과 같은 parameter들에 의하여 음성학적으로 판별될 수 있었다. The aim of this study was to divide vocalizations of laying hens (Hy-Line Brown) into general vocalizations (GVs), heat stress-related vocalization (HSV), and cold stress-related vocalizations (CSVs) and to determine if they are classified by the discriminant function analysis method. Thirty laying hens, 65-wk-old, were recorded using digital video recorders 2 times from 10:00 to 14:00 h in each thermal environment (thermoneutral: $22.0{\pm}1.8^{\circ}C$, too hot: $32.0{\pm}2.0^{\circ}C$, too cold: <TEx>$8.0{\pm}1.9^{\circ}C)$ after a 7 day acclimation period. When the laying hens were not recorded, they were kept in thermoneutral conditions. The GVs, HSV, and CSVs were divided based on the shapes of spectrums and spectrograms. The GVs, HSV, and CSVs were identified as 5, 1, and 3 types, respectively. Pitch, intensity, duration, formant 1, formant 2, formant 3, and formant 4 among the thermal environment-related vocalizations were significantly different (P<0.001). The discrimination rate determined by discriminant function analysis was 86.2%. These results suggest that HSV and CSVs are present and may be used as an indicator of the thermal environment.

영상처리기법을 이용한 스톨 사육 모돈의 인공수정적기 예측 장치 개발

김동주 ( D. J. Kim ),연성찬 ( S. C. Yeon ),장홍희 ( H. H. Chang ) 한국동물자원과학회 2007 한국축산학회지 Vol.49 No.5

논문 : 생물생산시설 및 환경공학 ; 직접반사형 포토센서를 이용한 스톨 사육 모돈의 인공수정적기 예측 장치 개발

김동주 ( D. J. Kim ),연성찬 ( S. C. Yeon ),장홍희 ( H. H. Chang ) 한국농업기계학회 2004 바이오시스템공학 Vol.29 No.6

돼지의 수·포유행동 유발에 효과적인 소리의 선정

전중환,연성찬,장홍희 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.4

Piglets communicate with their sow by using special sounds and synchronize their suckling behavior with their mother's grunting. This study sought to find an effective sound for controlling the nursing/suckling behavior of pigs. Eighteen crossbred Landrace×Yorkshire sows and their piglets size studied on days 1, 7, and 14 post-partum. The parity of the sows was three or four. The litter size ranged from 9 to 11, with a mean fo 10.4 piglets. Thirty minutes after the end of the last suckling, either the nursing-suckling sound (NSS) or the nursing-suckling sound + click sound (NSSCS) was played for 90s randomly, and this experiment was repeated three times. The behavior of the sows and their piglets was reecorded using camcorders and observed each second. When comparing NSS and NSSCS, there was less lying and sleeping and more sitting, standing, walking, and massaging when NSSCS was played than when NSS was played. These results suggest that NSSCS may iduce more nursing suckling in pigs than NSS.

분만 후 모돈의 행동적 회복과 포유자돈의 행동적 발달

전중환,김동주,한지훈,연성찬,장홍희 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.6

We investigated postpartum behaviors of sows and their litters. The aim of this study was to determine the behavioral recovery of sows and behavioral development of their piglets postpartum. Five multiparous sows(Landrace × Yorkshire) and their litters were studied over a period of 5 days postpartum. The litter size varied from 8 to 13 with a mean of 11.2 piglets. The behaviors of sows and their piglets were recorded using five CCD cameras, a multiplexer and a time lapsed VCR. The videotapes were scanned every 2 min to obtain an instantaneous behavioral sample. In the behaviors of sows, ?Lying ventrally? increased from 1h postpartum to 26g postpartum, then decreased gradually, and stabilized after 80h postpartum. ?Lying ventrally? decreased from 1h postpartum to 26h postpartum and stabilized after 80h postpartum. ?Standing, drinking and feeding? increased from 1h postpartum to 23h postpartum, then decreased gradually, and increased again from 60h postpartum. ?Sitting? increased from 1h postpartum to 46h postpartum and then decreased. In the behaviors of piglets, ?Lying? increased rapidly from 1h postpartum to 45h postpartum, and then was maintained at an almost constant level. ?Massaging and Suckling? decreased rapidly from 1h postpartum to 36g postpartum, and then was maintained at an almost constant level. ?Walking? increased from 1h postpartum to 21h postpartum, then decreased gradually. These results suggest that the behavioral recovery of the sow is almost completed at 80h postpartum and that the behavioral development of the piglet is almost completed at 45h postpartum.

한우 어미소와 송아지의 행동 특성

한지훈,김동주,전중환,장홍희,구자민,김은정,이효종,연성찬 한국동물자원과학회 2004 한국축산학회지 Vol.46 No.1

This study was performed to investigate the behavioral characteristics of Hanwoo(Bos taurus coreanae) cows and their calves. Four cows and their calves were placed in pens. The behaviors of each cow and calf were recorded using a time lapse VCR from 07:00 h to 18:00 h for 6 days and were analyzed using the scan point sampling method. The cow's behaviors in order of frequency were LD(lying down, 25%), ST(standing, 23%), EA(eating, 13%), LR(lying down rumination, 10%) and SR(standing rumination, 7%). The cows spent less than 3% of their time PG(pairwise grooming) and SF(sniffing). The calves mainly showed LD(52%), ST(28%), LF(lying flat, 4%), EA(3%) and WA(walking, 3%). The calves spent less than 2% of their time SF(sniffing) and SUK(sucking). The behavioral patterns of cows and calves at 07:00 h, 12:00 h and 18:00 h were different, especially in ST and LD.