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Dopamine modulates the physiological response of the tiger shrimp Penaeus monodon |
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| Authors: | Chin-Chyuan Chang Zhi-Rong Wu Cheng-Shou Chen Ching-Ming Kuo Winton Cheng |
| Affiliation: | aDepartment of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan bDepartment of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan cDepartment of Applied Japanese, Diwan College of Management, Tainan, 721, Taiwan dMarine Research Station, Institute of Zoology, Academia Sinica, Jiaoshi, Ilan, 26242, Taiwan |
| Abstract: | Levels of glucose, lactate, pO2, pCO2, HCO3−, TCO2, Na+, K+, Cl−, protein, and oxyhemocyanin in the hemolymph and its osmolality and pH were measured when tiger shrimp, Penaeus monodon (13.5 ± 1.5 g body weight), were individually injected with saline or dopamine at 10− 8, 10− 7, or 10− 6 mol shrimp− 1. Results showed that hemolymph glucose, lactate, pCO2, HCO3−, and TCO2 values increased from 2 to 4 h; hemolymph osmolality, Na+, and total protein had increased at 2 h; and hemolymph K+ decreased from 2 to 8 h after the dopamine injection. All physiological parameters returned to the control values 4–16 h after receiving dopamine. The dopamine injection also significantly decreased the oxyhemocyanin/protein ratio of P. monodon which occurred at 2 h, resulting from an elevation of hemolymph protein and a slight decrease of oxyhemocyanin. These results suggest that stress-inducing dopamine caused a transient period of modulation of energy metabolism, osmoregulation, respiration, and the acid–base balance in P. monodon in adapting to this environmental stress. |
| Keywords: | Penaeus monodon Dopamine Glucose Lactate Osmolality Ion Respiratory gas Protein Oxyhemocyanin Acid–base balance |
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