• Journal of Aquaculture
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• v.1 no.1
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• pp.25-39
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• 1988

The flounder reared in captivity matured and spawned when the water temperature gradually increased to $14\~15^{\circ}C$ from $12^{\circ}C$ during winter and the diurnal photoperiod changed from 10L/14D in winter season to 14L/10D in spring. The eggs spawned naturally by reared spawners in captivity during the first half of a spawning period were superior in quality to those spawned during the later half. It would be better to use the eggs of the first half for the mass production of the seedlings.

• Korean Journal of Poultry Science
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• v.48 no.4
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• pp.239-253
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• 2021

This study investigates the metabolomic changes in breast and thigh meat from Cobb and Ross 308 chickens regarding the rearing environment. One-day-old Cobb and Ross broilers were raised for 35 days in conventional and animal welfare farms with, amongst others, different floor sizes, stock densities, and ammonia concentrations. One-dimensional ¹H nuclear magnetic resonance, orthogonal partial least squares-discriminant analysis (OPLS-DA), and pathway analyses were performed to analyze the metabolomic properties of broiler meat. For breast meat, only those from the Ross strain could be separated according to the environment in the OPLS-DA plot. Ross breast meat from animal welfare farms showed significantly higher acetate, anserine, creatine, and inosine monophosphate content than those from conventional farms (P<0.05). In contrast, for thigh meat, the Cobb strain was differentiated using OPLS-DA. The contents of five metabolites, such as glucose and lactate, were higher in thigh meat from animal welfare farms; however, nine metabolites, including seven free amino acids, were lower compared to those from conventional farms (P<0.05). Pathway analysis was performed to interpret the biological changes in chicken meat based on environmental factors. The results indicated that the animal welfare environment led to significant changes in four metabolic pathways in Ross breast meat and in 20 metabolic pathways in Cobb thigh meat (P<0.05). In conclusion, the animal welfare environment could influence the metabolomic properties of Ross breast meat and Cobb thigh meat, which may affect the sensory quality of meat.

• KOREAN POULTRY JOURNAL
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• v.34 no.7 s.393
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• pp.75-79
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• 2002

우리나라의 기후는 분명 변하고 있다. 이미 6월초 부터 실제적으로 혹서기를 맞이한 현재, 우리가 살고있는 이 땅에 봄과 가을은 점점 그 기간이 짧아지고 있다. 불과 몇 년전만 해도 육계 사육에 있어서 가장 혹독한 기간($2\~5$월)을 보내고 나서 적어도 한 파스는 더위 스트레스에 시달리지 않고 사육하여 출하 할 수 있었다. 혹서기에 내 육계농장이 위치한 지역의 온도와 습도, 바람의 방향 등 환경요인을 이해하고 이에 적극적으로 대처해야만 우수한 육계 사육 성적을 확보할 수 있는 바, 본고에서는 우리 육계 사양가들께서 열정과 관심을 갖고 있다면 극복할 수 있는 고온 스트레스 예방 대책에 초점을 맞추고자 한다.

• 월간낙농육우
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• s.129
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• pp.54-58
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• 1993

• Korean Journal of Organic Agriculture
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• v.18 no.3
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• pp.387-399
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• 2010

This experiment was conducted to investigate the effects of dietary supplementation of oriental herb extracts (Alpha $Plus^{(R)}$ (AP)+Dried Foxglove Powder (DFP)) on growth performance and proliferation of splenocytes in broiler chicken raised under low or high density stocking conditions. A total of 240 male broiler chicks were randomly divided into four treatment groups with three replicates composed of ten birds in low density stocking groups and thirty birds in high density stocking groups. The four treatment groups were as follows: Cl (low density without AP and DFP); T1 (low density with AP 0.2% and DFP 0.03%); C2 (high density without AP and DFP); T2 (high density with AP 0.2% and DFP 0.03%). The feed intake of the high density stocking group was significantly lower than that of low density stocking groups during overall experimental period (p<0.05). The body weight of high density stocking groups was lower than that of low density stocking groups (p<0.05). The decrease of feed intake and body weight gain in growing stage (7~25day) under the high density stocking condition seems to be recovered in final stage (26~34day). Meanwhile dietary supplementation of AP+DFP in low and high density stocking groups tended to have higher daily body weight gain than control groups. The proliferation of splenocytes in treatment groups was significantly higher than control groups (p<0.05). In conclusion, the result of the present study suggested that the oriental herb extracts (AP+DFP) could be used as an alternative feed additive resources to improve growth performance and immune activity in broiler chickens.

• Journal of Animal Environmental Science
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• v.15 no.1
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• pp.1-8
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• 2009

This study was conducted to analyze the effects of sow breeding environment on the reproduction in the first litter in a large-sized hog farm, located in Dangjin-gun, Chungnam from July 1st, 2007 to June 30th, 2008 and provide basic information to improve the sow productivity in a family farming sows. The results obtained were as follows; 1. The gestation periods were proved to be similar without significant differences between indoor and outdoor breeding grounds, The average of farrowing rate was 91.91%, and 92.54% farrowing rate of out-door ground breeding sows was slightly greater than 91.57% of group-housed sows, but there was no significance between two groups. 2. The average of total litter size and the number of born alive per litter were 9.81 and 9.02, respectively. The number of total number was 0.98 and the number of born alive per litter was 1.18 in the outdoor-ground breeding sows, which was significantly greater than group-housed sows(p<0.001). 3. The number(rate) of piglets stillborn was 0.22(2.10%) from the outdoor-ground breeding sows was significantly greater, compared with 0.33(3.53%) from group-housed sows(p<0.01). The number of piglets culled was 0.23(2.27%) and 0.26(2.77%), in the out-door ground breeding sows and in group-housed sows, respectively and it was not significantly similar between two groups. And, the number of mummies was 0.21(2.1%) and 0.28(2.29%), in the out-door ground breeding sows and in group-housed sows, respectively, which showed no significance. 4. The weaning number in the playground breeding sows was 9.48 and it was significantly greater than that in the group-housed sows(p<0.001). The average of weaned age was observed to be 22.91 days. The weaned age in the out-door ground breeding sows was 22.39 days, and it was significantly smaller than that in group-housed sows(p<0.001). The breeding rate for the weaning of pigs was satisfactory as 96.82%, but there was no significant difference between two groups.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.909-910
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• 2009

본 논문은 모바일 단말 환경에서 3D 가상공간상에 접속하여 작물재배, 가축사육 등을 체험 할 수 있는 환경을 제공할 수 있도록 한다. 기존의 웹 형태를 통한 온라인 농작물재배/가축사육 시뮬레이션에서는 각종 자료와 정지화상(사진이미지)를 제공하고 있으며 사용자는 웹 접속을 통하여 학습 및 게임을 할 수 있다. 본 논문에서는 고정된 장소에서의 체험을 벗어나 이동환경인 모바일 단말에서도 3D 그래픽 기술을 통한 현실감있는 가상의 농장 환경을 제공하여, 작물재배에서부터 토지 환경까지 간단하고 직관적인 인터페이스로 쉽게 접근할 수 있는 시뮬레이션 환경을 제공하며, 농작물 재배가 실제 환경과 유사하도록 시뮬레이션 엔진을 구성하였다. 특히 Open GL 같은 범용 라이브러리가 탑재되지 못하는 저 사양의 모바일 단말을 위하여 3D 엔진을 자체적으로 구성하여 범용성을 도모하였다.

• 월간낙농육우
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• v.17 no.7 s.183
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• pp.102-105
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• 1997

한우를 사육하는데 있어 하절기는 생산활동을 저해하는 환경요인을 제공하고 있으므로 기온, 습도, 일사, 바람, 기압, 공기 및 흡혈곤충의 피해를 최소화 할수 있도록 노력 해야한다. 기온이 높으면 사료섭취향이 떨어지고 파리, 모기 진드기등에 의해 건강상태가 부진해지면 특히 임신우의 경우 일사병과 소화장애를 가져올수 있다. 현재 한우를 사육하고 있는 축사의 구조를 보면 계류식우사, 개방식우사, 지붕개폐식 개방식우사, 단방식우사등 여러형태를 볼수 있으며, 여름

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.68-69
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• 2003

외해에서 가두리를 이용하여 수산생물을 사육하는 방법은 연안에서 수산생물을 사육하는데 발생하는 해양오염 및 양식 공간의 제약 등 여러 가지 문제를 해결할 수 있는 현실적인 방안으로 인식되고 있다. 하지만, 외해에 부설되는 가두리는 대형의 시스템이며, 그 관리와 수리가 불편하고 외양의 해양환경에 견딜 수 있도록 부설되어야 하기 때문에 어려움이 따른다. (중략)

• KOREAN POULTRY JOURNAL
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• v.17 no.11 s.193
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• pp.128-135
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• 1985

농가마다 사정에 따라 수치의 차이가 상당히 있겠지만 앞으로 5천불 소득시대에 양계인으로 타산업과 경쟁을 할 수 있으려면 산란계 40,000$\~$50,000수의 사육규모는 되어야 할 것 같다. 종전에는 대군사육군에서 생산성이 떨어졌으나 기계화도입에 따라 환경을 제어하는 방법에 따라 소군사양방법보다는 대군사양농가에서 수익성은 더욱 높아질 것이다.