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http://dx.doi.org/10.5352/JLS.2022.32.9.706

Comparison of Stress in General Farms and Animal Welfare Farms Using Feather Corticosterone Analysis  

Kim, Jong-Ryun (Department of Animal Biotechnology, Jeonbuk National University)
Choe, Ho-Seong (Department of Animal Biotechnology, Jeonbuk National University)
Shim, Kwan-Seob (Department of Animal Biotechnology, Jeonbuk National University)
Publication Information
Journal of Life Science / v.32, no.9, 2022 , pp. 706-711 More about this Journal
Abstract
Broiler chickens are exposed to various stresses throughout their lives, and those stresses affect their well-being and meat quality. Therefore, the farm breeding system is critical for reducing stress in broilers and improving animal welfare. This study was conducted to evaluate the difference between general farms and animal welfare farms and to evaluate feather corticosterone as an index for measuring stress. Samples of 28-day-old broilers (blood, feathers, and muscle) were collected from slaughter-houses, and corticosterone, along with HSP70, glycogen, and L-lactate, were extracted from feathers and serum as indicators of broiler stress levels and energy metabolism. The analysis results confirmed a significantly (p<0.01) higher feather cortisone level in the general farm group than in the welfare farm group, but no significance was detected for serum corticosterone. HSP70 levels did not differ in muscles and feathers. Glycogen levels were significantly higher in the general farm group than in the welfare farm group (p<0.01), but L-lactate levels showed no difference. Our results suggest that feather corticosterone can be used as an indicator to evaluate stress differences between general farms and animal welfare farms and that long-term stress can be assessed.
Keywords
Animal welfare; broiler; corticosterone; feather; stress;
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