The Effects of Different Low Temperature Cold Stimulation on Tibias Fluctuating Asymmetry of China-Lindian Native Chickens

Abstract

In this study, China-Lindian native chickens were given cold stimuli from the following three aspects: different interval days, different decrease of temperature and different stimulation time. The three levels of different interval days are interval of 0 day , interval of 1 day and interval of 2 days; The three levels of different decrease temperature are temperature decreasing 3℃, temperature decreasing 5℃ and temperature decreasing 7℃; The three levels of different stimulation time are stimulating time of 1h, stimulating time of 3h and stimulating time of 6h.We identified the influence of cold stimuli on welfare of CLNC through detecting fluctuating asymmetry welfare indexes.The main fluctuating asymmetry welfare index of detection were asymmetry of tibias.It was concluded from the study that the stimulation time of cold stimuli had effect on asymmetry of tibias (P0.05); and the interval days of cold stimuli had no effect on asymmetry of tibias (P>0.05).