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http://dx.doi.org/10.7744/cnujas.2015.42.3.231

Effect of mixing with non-familiar piglet on change of body temperature  

Kim, Kwang-Sik (National Institute of Animal Science, Rural Development Adminstration)
Cho, Eun-Seok (National Institute of Animal Science, Rural Development Adminstration)
Kim, Young-Hwa (National Institute of Animal Science, Rural Development Adminstration)
Kim, Jo-Eun (National Institute of Animal Science, Rural Development Adminstration)
Seol, Kuk-Hwan (National Institute of Animal Science, Rural Development Adminstration)
Kim, Ki-Hyun (National Institute of Animal Science, Rural Development Adminstration)
Publication Information
Korean Journal of Agricultural Science / v.42, no.3, 2015 , pp. 231-235 More about this Journal
Abstract
This study was performed to investigate the change of the body surface temperature during socialization of weaning pigs. A total of 108 piglets (Landrace 60 and Yorkshire 48) aged 31 (${\pm}1.1$) day was used for this study. Experiment was designed as follows; familiar group (T1), randomly mixed with unfamiliar piglets (T2), mixed based on weight of unfamiliar piglet (T3). The transport and mixing of pigs were performed at 10:00, and then body surface temperature was taken by thermo-graphic camera after 4 hours (14:00). Average surface temperature and hot-spot-temperature, which is the hottest spot of the body surface, were analyzed using Testo IRsoft 3.1 software. Average temperature of body surface were 36.0, 38.2, and 37.5 in T1, T2, and T3, respectively. Average of body surface temperature in T2 and T3 were higher (p<0.001) than T1, and average temperature of body surface of T3 was greater (p<0.001) than that of T2. The hot-spot-temperature of T1, T2, and T3 were 38.7, 39.5, and 39.6, respectively. The hot-spot-temperature of T2 (p<0.01) and T3 (p<0.001) were significantly higher than that of T1. Above results demonstrate that grouping unfamiliar pigs leads to increase in the body temperature possibly by pigs aggressive behavior during social conflict. By the result on average body temperature, this study suggests that the mixing with similar body weight would increase the struggle time and frequency.
Keywords
Weaning; Stress; Mixing; Body surface temperature; Piglet;
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