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The Influence of Noise on the Behavior, Heart Rate Variability and Morphology of Ovarian Tissue of Chicken

Author: WuZuo
Tutor: YanPeiShi
School: Nanjing Agricultural College
Course: Animal Nutrition and Feed Science
Keywords: Noise Behavior Heart Rate Variability Ovarian Morphology
CLC: S831
Type: Master's thesis
Year: 2009
Downloads: 16
Quote: 1
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Abstract

With the rapid development of urban rail in China, the noise pollution of rail transport has become a increasing prominent factor which affects the urban environment. Noise would cause noise stress of animals, the present study analyzed the behavior changes, cardiac cycle and the heart rate variability response to noise as well as morphological changes in ovarian tissue, and the results can be used as the theoretical basis to evaluate stress situation and conduct whether it has been adapted to animals as well as the ovarian tissue injury.In the first part of the research,46-day-old Sanhuang-Chicken were used to stimulate with 125dB and 98dB sound of metal falling body in 8 minutes 0.2 seconds of each rhythm, the act and habituation of escape were observed. In the beginning of the sound Stimulation (125dB), there were some panic behaviors, such as jumping, running. The rise of wait-and-see appeared, with the number of stimulation increased, the number of panic behavior reduced and then disappeared. After three days sound stimulation, the intensity of sound stimulation reduced to 98dB, we found that relatively strong escape acts disappeared; the rise of wait-and-see is the most important act. Stimulated with 98 dB after another three days, the results were similar to the former result which stimulated with98 dB. The changing of panic behavior can reflect the response to noise exposure and the habituation adaptive tendency.In the second part of the research, the heart rate variability was used to analysis the effect of noise on animals. We also investigated the impact of noise on Sanhuang-Chicken from the cardiac cycle and heart rate variability in time-domain perspective. Twelve healthy 2-day-old experimental chicken, which were feeding on the bio-bed to 50-day-old in the fermentation bedding, were divided into three groups randomly and stimulated with subway noise, seismic noise and grinder voice which intensity was 95dB respectively. The results showed that:during the process of playing noise, the cardiac cycle of Sanhuang-Chicken was shortened, the autonomic nervous control system was inhibited and the RMSSD was decreased. The above results showed that in the process of stimulating with External noise, the parasympathetic excitatory of Sanhuang-Chicken reduced, the autonomic nervous system was inhibited or damaged. Heart rate variability can be used as an index to estimate whether animals were in noise stress or other kinds of stress.In the third part of research, we figured out that the influence of the noise from subway on ovarian morphology of ISA hens.20 healthy 100-day-old and 20 healthy 300-day-old ISA hens were selected. We divided them into 100-day-old test group and the control group, 300-day-old test group and control group randomly,10 chickens per group each. The test groups were stimulated with subway noise in the zoo.After histology observation of the ovarian of hens, the results were as follows:compared with control group, the chicken in100-day-old test group, had fewer secondary follicles and more follicular atresia. Noise stimulation hindered the development of ovarian as well as influenced of the generation of secondary follicles. Compared with control group, chicken in 300-day-old test group had fewer secondary follicles and other no significant changes, it can be concluded that such noise has less impact on adult hens.

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CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > Poultry > Chicken
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