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J Anim Sci Technol


Title:"Evaluation of pig behavior changes related to temperature, relative humidity, volatile organic compounds, and illuminance"
Author(s):Kim YJ; Song MH; Lee SI; Lee JH; Oh HJ; An JW; Chang SY; Go YB; Park BJ; Jo MS; Lee CG; Kim HB; Cho JH;
Address:"Division of Food and Animal Science, Chungbuk National University, Cheongju 28644, Korea. Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea. Department of Animal Biotechnology, Kyungpook National University, Sangju 37224, Korea. Dronic, Daejeon 35240, Korea. Department of Animal Resource and Science, Dankook University, Cheonan 31116, Korea"
Journal Title:J Anim Sci Technol
Year:2021
Volume:20210731
Issue:4
Page Number:790 - 798
DOI: 10.5187/jast.2021.e89
ISSN/ISBN:2055-0391 (Print) 2055-0391 (Electronic) 2055-0391 (Linking)
Abstract:"The objective of this study was evaluation of pig behavior changes related to temperature, relative humidity, volatile organic compounds (VOCs), and illuminance. A total of 24 growing pigs ([Yorkshire x Landrace] x Duroc) were used in the experiment. A sensor was installed at a height of 0.5 m in the center of the pig house. In experiment 1, temperature was changed every four days to 18 degrees C (T1), 22 degrees C (T2), 26 degrees C (T3), and then 30 degrees C (T4). In experiment 2, relative humidity was adjusted to 45% (low humidity [LH]), 60% (middle humidity [MH]), and then 75% (high humidity [HH]) for four days. In experiment 3, after cleaning the pig house just before experiment, only minimal ventilation was provided. VOCs and pig behaviors were observed for 7 days without cleaning the pig house. In experiment 4, three light bulbs of 40 W (470 lumens / 45 lx; low illuminance [LI]), 75 W (1,055 lumens / 103 lx; middle illuminance [MI]), and 100 W (1,521 lumens / 146 lx; high illuminance [HI]) were used for four days each. Pig behavior analysis was performed for following criteria : Feed intake, Standing, Lying, Sitting, Drink water, Rooting, Posture transition (lying-standing), Posture transition (standing-lying), Wallowing, and Biting. In experiment 1, feed intake time was lower (p < 0.05) for the T3 than other treatment groups. Standing time was highest (p < 0.05) for the T1 and lowest (p < 0.05) for the T3. Lying time was shorter (p < 0.05) in T1 and T2 compared to T3 and T4. Drinking frequency was higher (p < 0.05) for the T4 than other treatment groups. In experiment 2, the frequency of rooting and wallowing increased (p < 0.05) with increasing humidity. LH showed the lowest (p < 0.05) rooting frequency and HH showed the highest (p < 0.05) rooting frequency. In experiment 3, VOCs concentration did not (p > 0.05) change pig behavior. In experiment 4, lying time was the longest (p < 0.05) at LI and shortest (p < 0.05) at HI. Therefore, pig behavior is heavily influenced by the environment, especially temperature and humidity. However, correlation between pig behavior to VOCs and illuminance seems to be needed more research"
Keywords:Illuminance Pig behavior Relative humidity Temperature Volatile organic compounds;
Notes:"PubMed-not-MEDLINEKim, Yong Ju Song, Min Ho Lee, Sang In Lee, Ji Hwan Oh, Han Jin An, Jae Woo Chang, Se Yeon Go, Young Bin Park, Beom Jun Jo, Min Seok Lee, Chang Gyu Kim, Hyeun Bum Cho, Jin Ho eng Korea (South) 2021/08/28 J Anim Sci Technol. 2021 Jul; 63(4):790-798. doi: 10.5187/jast.2021.e89. Epub 2021 Jul 31"

 
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