碩士 / 國立屏東科技大學 / 熱帶農業暨國際合作研究所 / 93 / This study was to determine the effects of dopamine on the immunity and suscetability of the freshwater giant prawn, Macrobrachium rosenbergii, to the pathogen, Lactococcus garvieae, by injecting the prawn with saline or dopamine at 0.5, 5.0, and 50.0 pmol per prawn. The effects of dopamine were determined by measuring the total hemocyte count (THC), phenoloxidase activity, respiratory burst (release of superoxide anion), superoxide dismutase activity, and phagocytic activity and its clearance efficiency to prevent the growth of L. garvieae. The results show that a transient period of immunosuppression on all immune parameters, except circulating hemocytes, occurred between 2 and 8 h after injection of dopamine. All of the immune parameters returned to the values same as the control within 8 – 16 h after receiving dopamine. Injection of dopamine also significantly increased the mortality of M. rosenbergii challenged with L. garvieae. These results suggest that stress-inducing dopamine suppresses the immune system, which in turn promotes the susceptibility of M. rosenbergii to L. garvieae.
| Identifer | oai:union.ndltd.org:TW/093NPUST643010 |
| Date | January 2005 |
| Creators | Ou-Chuan Chen, 陳歐泉 |
| Contributors | Winton Cheng, 鄭文騰 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 64 |
Page generated in 0.0021 seconds