• 한국축산시설환경학회지
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• 제7권3호
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• pp.183-190
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• 2001

본 연구는 영상처리를 통한 보다 간편하고 정확한 젖소의 체중측정을 위해 수행되었다. 카메라와 개인용 컴퓨터를 이용하여 젖소의 영상을 받은 후 이의 화소 값들을 이용하였으며, 또한 여러 가지 방법으로 체중과의 관계를 회귀분석 방법을 하였다. 1. 본 실험의 결과 다중회귀식에 의한 계산체중, 화소표면적, 부피와 체증과의 상관계수는 각각 0.9424, 0.9439, 0.9651로 나타났으며, 젖소의 체중과 상관관계도가 높았다. 2. 실험에 이용된 젖소의 개체수를 50두이었지만, 각각 상태별 체형의 차이고 인하여 일관된 회귀식을 적용하기에는 정확도 문제에서 다소 문제가 있었다. 그래서 각 개체군으로 나누어서 연구할 필요가 있을 것으로 판단되었다. 3. 젖소의 체중 계측시간은 10초에 불과하지만 실험장치까지의 유도과정은 편균 한 마리에 10분 정도가 소요되었다.

• 한국화재소방학회논문지
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• 제21권4호
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• pp.81-87
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• 2007

근래에 축사가 화재로 인하여 큰 피해가 발생하고 있다. 또한 화재로 피해를 입은 축사를 재건축하기가 매우 어렵다. 이러한 화재로부터 축사를 보호하기 위해서 철저한 재검토가 필요하다. 소방서에서 화재를 예방하는 대에는 한계가 있다. 무엇보다도 축사를 운영하는 사람이 어떻게 예방할 것인가를 아는 것이 중요한데, 축사를 화재로부터 예방하는 것을 명백히 세분할 필요가 있다. 화재로부터 축사를 안전하게 보호하는 것이 중요하다. 축사관리자는 화재를 진압하는 장비를 갖추어야 한다. 대부분의 축사화재는 전기에서 기인된다. 따라서 전기시설의 재정비가 필요한데, 소방서나 한전과 같은 기관의 도움이 필요하다. 축사소유자나 그 종사자들에게 화재발생 원인을 소방 교육을 통하여 알려야 한다. 소방서는 매년 발생하는 축사화재에 대비하여 소방도로나 장비, 경보시설 등을 정비하고 소방훈련 등을 실시하는 것이 화재예방에 도움에 될 것이다.

• 한국동물위생학회지
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• 제34권3호
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• pp.245-250
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• 2011

In the present study, we carried out a seropositive survey of Neospora (N) caninum and Toxoplasma (T) gondii in cattle at northern area of Gyeongnam province, Korea. Serum sample was obtained from Holstein cattle (n=248, 44 farms in 5 counties) and Korean indigenous cattle (n=120, 23 farms in 4 counties). All 368 sera were tested for antibodies to N. caninum and T. gondii by an enzyme-linked immunosorbent assay (ELISA). Seropositive of N. caninum at farm and heads were 41.8% (28/67) and 12.8% (47/368), respectively. Twenty-five cattle (6.8%) were seropositive to T. gondii, and eighteen (26.9%) of 67 studied farms had cows seropositive to T. gondii. The seroprevalence of Holstein cattle was much higher than that of Korean indigenous cattle. There was no apparent association of T. gondii seropositivity with age, while the seropositivity for N. caninum was associated with cattle age. The farm of cattle above the age of 5 years (16.8%) was more infective than less than 4 years (9.3%). This is the first report on seroprevalence of N. canium and T. gondii in Holstein and Korean indigenous cattle in Gyeongnam, Korea.

• 한국수정란이식학회지
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• 제30권1호
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• pp.65-71
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• 2015

The aim of this study was to determine the relationship between the coat color appearance of Korean brindle cattle and the changes of relevant hormone levels that may affect the hair pigmentation during different stages of growth and maturation. In mature cattle, levels of both ACTH and DHEA in Korean brindle cattle with brown color were significantly higher than those with black color (p<0.05). Levels of ${\alpha}$-MSH in Korean brindle cattle with whole brindle ($${\geq_-}50%$$) color were significantly higher than those with brown color (p<0.05). In calves of Korean brindle cattle at 2 to 6 months, the concentration of estradiol was significantly higher in calves with whole brindle color than those with part brindle color (p<0.05), when the coat color was confirmed. After 6 month of coat color confirmation, levels of testosterone and ACTH increased in calves with part brindle color and were significantly higher than those with whole brindle color (p<0.05). In calves of Korean brindle cattle at 1 or 2 months, there were no significant differences in hormone levels of estradiol, ACTH, DHEA and ${\alpha}$-MSH between the calves with brindle color and brown color, except estradiol before brindle color appearance. Changes of relevant hormone levels at different stage of growth and maturation may affect the pigmentation of coat during the development of cattle. In addition to the current study correlating the different coat colors with relevant hormone levels, investigation of the coat color associated genes expressed in Korean brindle cattle may further clarify the mechanisms of coat color changes during their development.

• Animal Bioscience
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• 제37권2호
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• pp.295-302
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• 2024

Objective: The aim of this study was to assess the effect of Thai native cattle grazing in the lowland or mountain forest on carcass characteristics, meat quality, sensory palatability, and chemical composition. Methods: Twelve male Thai native cattle with an average weight of 110±10 kg are allowed to be grazing in the lowland or Phu Phan mountain forest during the rainy season in northeastern Thailand. Results: The carcass characteristics, meat pH, and meat color were unaffected by treatment (p>0.05). The boiling loss was lower in the cattle grazing on the mountain forest (p = 0.027). The cattle grazing in the mountain forest had increased shear force (p = 0.039), tenderness (p = 0.011), and flavor intensity (p = 0.003). The protein and fat were higher (p<0.001 and p = 0.035, respectively) in cattle grazing in the mountain forest. The different grazing systems of the cattle had no effect (p>0.05) fatty acids in meat, except for capric acid (C10:0) and lauric acid (C12:0), which were higher (p = 0.046 and p = 0.049, respectively) when the cattle were grazing in the mountain forest. The different grazing systems did not influence (p>0.05) the unsaturated fatty acids in meat. Conclusion: Thai native cattle grazing in the Phu Phan mountain forest in the rainy season improves meat quality, sensory evaluation, and chemical composition.

• Parasites, Hosts and Diseases
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• 제55권5호
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• pp.481-489
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• 2017

Tick-borne pathogens can cause serious problems in grazing cattle. However, little information is available on tick-mediated diseases in cattle grazing on mountains. Thus, this study aimed to understand the potential problems related to tick-borne diseases in grazing cattle through the investigation of prevalent tick-transmitted infections, and their associated hematological changes, in terms of season and grazing type in Korean indigenous cattle (=Hanwoo). Hanwoo cattle from 3 regions of the Republic of Korea (=Korea) were either maintained indoors or placed on grassy mountains from spring to fall of 2014 and 2015. Cattle that grazed in mountainous areas showed a greater prevalence of tick-borne infections with an increased Theileria orientalis infection rate (54.7%) compared to that in non-grazing cattle (16.3%) (P<0.001). Accordingly, the red blood cell (RBC) count and hematocrit (HCT) values of grazing cattle were significantly lower than those of non-grazing cattle throughout the season (P<0.05). Moreover, RBC, hemoglobin (Hb), and HCT of T. orientalis-positive group were significantly lower than those of T. orientalis-negative group (P<0.05). T. orientalis is a widespread tick-borne pathogen in Korea. Grazing of cattle in mountainous areas is closely associated with an increase in T. orientalis infection (RR=3.4, P<0.001), and with consequent decreases in RBC count and HCT. Thus, these findings suggest that the Hanwoo cattle in mountainous areas of Korea are at a high risk of infection by T. orientalis, which can lead to hematological alterations. This study highlights the necessity of preventive strategies that target T. orientalis infection.

• Asian-Australasian Journal of Animal Sciences
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• 제16권11호
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• pp.1560-1564
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• 2003

The study was carried out in Sahiwal, Holstein Friesian, Jersey and crossbred cattle to find out the effect of genotype of beta-lactoglobulin gene on milk production traits. The polymorphism at beta-lactoglobulin gene was identified by conducting PCRRFLP studies. A 398 bp fragment of the gene was amplified and digested with Hae III restriction enzyme. The two alleles A and B and three genotypes AA, AB and BB were identified in all cattle breeds. The frequency of B allele was comparatively higher than that of A allele. The AA genotype produced significantly higher milk yield in Sahiwal cattle whereas BB genotype yielded higher milk in Holstein friesian cattle. In other cattle breeds the genotypic effect was non-significant. In conclusion it may be stated that the genotype with significantly higher milk yield may be favoured in the farm along with other conventional selection criteria to enhance the milk production of animals.

• 한국유기농업학회지
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• 제16권2호
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• pp.173-188
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• 2008

This study focused on production and distribution situations of Korean organic beef cattle at Hongseong Chungnam. Case Farmers have raised cattle organically based on interchange between a few Consumers' Life Cooperatives(CLC) and them. CLC furnished with funding to purchase calves and bought the cattle beef. However, they have many problems related to procuring organic feed in producing organic beef. Presently, they have used organic byproducts from sowing farming and prepared grass places. But they don't breed organic beef cattle in a large scale because of the limitation of organic feed output.

• 한국동물위생학회지
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• 제14권2호
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• pp.154-158
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• 1991

To investigate the Akabane antibody in the cattle with the serological test in Chung Chung Buk Do from May to Nov 1191. The result are summarized as follows. 1. Breed in cattle reacted as positive condition in Akabane antibody 76 heads(42%) in 180 cattles reacted as positive condition in Akabane antibody, 23 heads(51%) in 45 Korea native cattle reacted as positive condition in Akabane antibody. 2. During 5, 9, 10, 11 month, Akabane antibody in cattle is over 45%. 3. Less of 2 years old and over 4 years old cattle are Akabane antibody in cattle is over 40%. 4. The relation of titer of 2 folds of dilution HA and 10 folds of dilution TCID$_{50}$ was same relation.n.

• Parasites, Hosts and Diseases
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• 제41권1호
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• pp.1-16
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• 2003

Neospora caninum is a coccidian parasite of animals. It is a major pathogen for cattle and dogs and it occasionally causes clinical infections in horses, goats, sheep, and deer. Domestic dogs are the only known definitive hosts for N. caninum. It is one of the most efficiently transmitted parasite of cattle and up to 90% of cattle in some herds are infected. Transplacental transmission is considered the major route of transmission of N. caninum in cattle. Neospora caninum is a major cause of abortion in cattle in many countries. To elicit protective immunity against abortion in cows that already harbor a latent infection is a major problem. This paper reviews information on biology, diagnosis, epidemiology and control of neosporosis in animals.