• 한국산학기술학회논문지
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• 제21권11호
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• pp.825-832
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• 2020

소의 발정을 정확하게 탐지하는 것은 번식률을 향상시키는데 매우 중요하며, 현재 발정기 소의 행동 특성들을 활용한 다양한 발정탐지 기술들이 개발되고 있다. 본 연구에서는 우리나라 고유품종인 한우의 발정기 행동변화에 대한 기초자료를 수집하기 위하여 발정기 한우의 활동량, 승가행동 및 발성횟수 등에 대해 조사하였다. 총 4두의 한우 경산우를 공시하였으며, 각 개체별로 목걸이형 생체정보 수집장치(Bio-telemetry device)를 설치하였다. 발정이 확인된 날을 포함하여 발정 2일 전부터 발정 후 3일까지 총 6일간 이동거리, 승가행동 및 발성음을 비교 분석한 결과, 발정 2일 전부터 발정 1일 전까지 이동거리의 변화가 거의 없었으나, 발정이 확인된 당일부터 급격히 증가하였으며(p<0.001), 발정 후 1일 후부터는 서서히 감소하기 시작하였다. 또한 소의 활동량이 낮보다 밤 시간대에 더 활발한 것으로 나타났다. 반면, 승가행동은 발정 2일 전부터 발생빈도가 점점 증가하기 시작하여 발정 당일에 가장 높게 나타났으며(p<0.01), 전 시간대에 걸쳐서 불특정하게 나타나는 것을 확인할 수 있었다. 한편, 발성음의 경우 발정 당일에는 발성음 빈도가 증가하는 경향을 보였으나 유의적인 차이가 없었다(p>0.05). 발정기 한우의 승가행동은 발정 2일전부터 시작해서 발정 당일에 가장 높게 나타나는 특성이 있기 때문에 활동량보다 우선적으로 발정을 예측할 수 있는 지표로써 활용 가능할 것으로 보이며, 이 두 가지 지표를 함께 활용한다면 한우의 발정탐지율을 향상시키는데 도움이 될 것으로 판단된다. 발정탐지율을 높이기 위해서는 한우의 발정기 행동 특성과 관련하여 더욱 다양한 정보들이 필요할 것이다.

• Asian-Australasian Journal of Animal Sciences
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• 제31권11호
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• pp.1714-1720
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• 2018

Objective: This study was conducted to analyze the effects of stocking density on growth and carcass quality, and behavior of Hanwoo cattle to conform with global trends, targeting animal welfare production through the practice of environmentally friendly condition. Methods: Thirty six steers were randomly assigned to three treatment groups (C: 5 heads, T1: 4 heads, T2: 3 heads) and reared in separate pens with a constant stocking density of $50m^2$ (C: $10m^2/head$, T1: $12.5m^2/head$, T2: $16.67m^2/head$) per group from 12 to 30 month of age. Growth performance, behavior and carcass quality traits of each steer were recorded and compared between the treatment groups. Results: In general, the average daily gain during the fattening period was lower in group T2 than in T1 and the control groups. However, carcass weight and dressing percentage was lower in the control group than in T1 or T2 groups (p<0.05). Also, marbling score at 30 months of age was the lowest in the control group (p<0.05), while the three heads group (T2) had the greatest longissimus muscle area and marbling score (p<0.05). The behavior of walking time was the greatest in T2 group, while self-grooming and fighting occurred with the most frequency in the control group (p<0.05). Conclusion: Our results show that the steers in more spacious stocking density had better carcass quality and wellbeing related behaviors, indicating that a lower density has a positive effect on raising management and carcass quality. Thus it is a need to install appropriate pens fitted to welfare-oriented management practices from growing to fattening period in Hanwoo cattle.

• 한국축산식품학회지
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• 제25권3호
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• pp.271-276
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• 2005

경남 지역에 거주하는 178명의 주부를 대상으로 브랜드 돈육의 소비행동을 분석하였다. 소비자들은 브랜드 돈육에 대한 인지도와 신뢰도는 낮은 것으로 조사되었다. 돼지고기 구입 시 고려하는 품질 요인은 안전성과 위생성, 맛과 연한 정도, 육색 순이었다. 재래 브랜드 돼지고기가 일반 돼지고기 보다 맛이 더 좋다($68.7\%$)고 하였으나, 가격은 비싼 편($67.0\%$)이라고 하였다. 한편, 돼지고기 품질인증은 정부기관보다는 소비자단체에서 하는 것을 선호하였다. 소비자들은 연령이나 수입에 따라서 정보를 얻는 경로나 구입횟수 및 구입장소가 다른 소비행동을 보인 것으로 분석되었다. 따라서 향후 브랜드 돈육 개발 시에는 브랜드의 가치에 대한 소비자들의 인식을 파악하고 또한 소비자의 구매 행동과 인지도, 기호도, 의사 결정 과정 등을 종합적으로 분석하여 반영하는 더 많은 연구가 진행되어야 할 필요성이 있다.

• Food Science and Biotechnology
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• 제15권5호
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• pp.721-727
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• 2006

This study was carried out to investigate the effect of hydrocolloids on the changes in physical properties of a model ice cream. The model ice cream contained water, sugar, skin milk powder, com oil, and 4 different hydrocolloid stabilizers (gelatin, pectin, hydroxyethylstarch, locust bean gum), was manufactured in a batch type freezer. The following physical characteristics of ice cream were examined: flow behavior, overrun, air cell size, ice crystal size, and melt resistance. With regard to flow behavior, all of aged mixes had a lower apparent viscosity relative to the mix before aging, and ice cream mix containing locust bean gum had the highest viscosity. Air cell size was observed to range from 20 to $38\;{\mu}m$, and ice cream with locust bean gum showed the largest size. There was an inverse correlation between overrun and air cell size. The ice crystal sizes of all samples ranged from 25 to $35\;{\mu}m$. Ice cream with added pectin contained the smallest ice crystal size, which was significantly difference from other stabilizers (p<0.05), and resulted in superior melt resistance with increased melting time compared to other samples.

• Animal cells and systems
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• 제16권5호
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• pp.351-356
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• 2012

Food is important to any animal, and a large part of the behavioral repertoire is concerned with ensuring adequate nutrition. Two main nutritional sensations, hunger and satiety, produce opposite behaviors. Hungry animals seek food, increase exploratory behavior and continue feeding once they encounter food. Satiated animals decrease exploratory behavior, take rest, and stop feeding. The signals of hunger or satiety and their effects on physiology and behavior will depend not only on the animal's current nutritional status, but also on its experience and the environment in which the animal evolved. In our novel, nutritionally rich environment, improper control of appetite contributes to diseases from anorexia to the current epidemic of obesity. Despite extraordinary recent advances, genetic contribution to appetite control is still poorly understood partly due to lack of simple genetic model systems. In this review, we will discuss current understanding of molecular and cellular mechanisms by which animals regulate food intake depending on their nutritional status. Then, focusing on relatively less known muscarinic and cGMP signals, we will discuss how the molecular and behavioral aspects of hunger and satiety are conserved in a simple invertebrate model system, Caenorhabditis elegans so as for us to use it to understand the genetics of appetite control.

• 한국임상수의학회지
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• 제37권1호
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• pp.15-22
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• 2020

This study investigated the effectiveness of radiation safety rules in animal hospital and the awareness and behavior of veterinary radiation workers. With the questionnaires, the data was collected from randomly selected veterinarians in animal hospitals and animal medical imaging centers. Collected data were about radiation device, shielding device, regulations, safety management, education, knowledge, behavior and awareness. Frequency, correlation and multiple regression analysis were performed. The medical devices related with radiation in animal hospital were X-ray (59%), CT (15%), fluoroscopy (12%), mobile X-ray (12%) and others (2%). The number of people using radiation shielding device is high. The answers were low on knowing radiation related regulation and receiving radiation protection education. The group with higher knowledge and awareness shows positive correlation with safety behavior. The increase of use of the radiation related medical devices in veterinary hospital causes the increase of radiation exposure risk. This study suggests that radiation safety management system and policies need to be developed to protect radiation workers and give them correct information and consciousness.

• 한국지구과학회지
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• 제23권1호
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• pp.112-118
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• 2002

The anomalous behaviour of animals prior to a large earthquake has been frequently reported from many places throughout the world since ancient times. This study is to experimentally testify what relations exist between the anomalous animal behavior and electric field effect, which is reported due to the piezo-electric effects in a basement rock before earthquake occurrences. We investigated the electric field effects on behaviors of two kinds of rats and birds. Rats show more sensitive anomalous behavior than birds. Even though the current applied to the experimental birds and rats is just a few ${\mu}$A, they show various abnormal behaviors. The anomalous animal behaviors under the small ground electric field may have some relations to the actual phenomena before great earthquake.

• 한국축산시설환경학회지
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• 제1권2호
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• pp.155-164
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• 1995

Despite considerable progresses made in our understanding of environmental fate of pollutants stemming from animal production systems, relatively little is known about the processes and mechanisms regulating their dispersement (via emission) into and deposition from the earth's atmospheric system. Here we present and summarize up-to-date knowledge on this topic with a main emphasis on their origin, physico-chemical characteristics, and geochemical distribution behavior.

• Journal of Ginseng Research
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• 제18권3호
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• pp.165-174
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• 1994

To investigate the significant indicators Improving the undisturbed memory in animal behavior, we employed several behavioral methods (learning, relearning in radial maze, and active avoidance) with ginseng components. Results showed that the repeated intranasal administration of $Rb_1$ and total saponins from Korean red ginseng induced direct effects on the brain mechanisms in rats, and improved the spatial memory during the learning, relearning and retention in the 12-arm radial maze test. The intranasal treatment of the total saponins also effectively improved the disturbed memory (amnesia) by pentylentetrazole, and simultaneously protected the brain by decreasing the severity of motor epileptic seizures. The intraperitonial administration of polysaccharide fraction of Korean red ginseng could improve avoidance behavior (amount of the total ecapes) in the active-avoidance test. In addition, local changes of the temperature and resistance of skin observed after Rb, administration were suggested to reflect some action of sympathetic nerve Key words Memory, intranasal administration, pentylenetetrazole, Korea red ginseng.

• Journal of Animal Science and Technology
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• 제65권3호
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• pp.579-587
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• 2023

In this study, rumen temperature and environment in estral and non-estral Korean Native breeding cattle were evaluated by using a bolus sensor. Behavioral and physiological changes in study animals were also assessed. To assess the rumen temperature and environment, we inserted bolus sensors into 12 Korean Native cattle with an average age of 35.5 months, then measured temperature and activity within the rumen using the wireless bolus sensor. Drinking, feeding and mounting behavior, and measured vaginal temperature and levels of intravaginal mucus resistance were recorded. We found that cattle in estrus exhibited more acts of mounting (37.4 vs. 0 times/day), increased vaginal temperature (39.0℃ vs. 38.4℃), and decreased vaginal mucus resistance (136.3 Ω vs 197.4 Ω), compared with non-estral animals. Furthermore, increased levels of rumen activity were most significant in estrus cattle at the highest activity levels (p < 0.01). Overall, the estrus group exhibited increased rumen temperature (p = 0.01), compared with the non-estrus group. In conclusion, the results of this study not only provide basic physiological data related to estrus in improved Korean Native breeding cattle, but also suggest that monitoring of rumen temperature and activity might be used as an effective smart device for estrus detection.