Effect of water temperature on the physiological responses of Asian catfish Clarias batrachus (Linnaeus 1758)

Singh S. P., . and Sharma J. G., . and Ahmad T., . and Chakrabarti R., . Effect of water temperature on the physiological responses of Asian catfish Clarias batrachus (Linnaeus 1758). pp. 26-38. ISSN 0116-6514

Temperature plays significant roles in the life of poikilothermic aquatic animal fish. The physiological responses of Clarias batrachus (Linnaeus 1758) magur (80.605.34 g) at different temperatures were observed. Fish were acclimated at 25 C for 21 days and were exposed at 10 15 20 25 30 and 35 C temperatures. Blood and muscle samples were analysed after 12h and 7 days of reaching the assigned temperatures. Significantly (P0.05) higher mortality of fish was found in 10 C treatment compared to the other groups. At 10 C 50 fish died within 5 days. Serum protein was significantly (P0.05) higher in fish exposed at 15 C compared to the other treatments. Myeloperoxidase and reduced glutathione were significantly (P0.05) higher in fish exposed at 30 C and 25 C respectively compared to the other groups. Nitric oxide synthase was significantly (P0.05) higher in fish maintained at 25 C and 30 C compared to the other treatments after 12h and 7 days of exposure respectively. Thiobarbituric acid reactive substance was significantly (P0.05) higher in fish exposed at 10 and 15 C compared to others after 12h and 7 days of exposure respectively. Lowering of temperature adversely affected physiological processes of magur. Introduction Among the various physical factors influencing the aquatic environment temperature is of great importance and it plays a critical role in the life of aquatic poikilotherms. Temperature is considered as an abiotic master factor (Fry 1971; Brett 1979). Physiological processes of fish such as food consumption digestion immunity etc. are influenced by water temperature. Five major effects of temperature on fish physiological processes are controlling masking limiting directing and acting as a lethal agent (Fry 1947). Temperatures beyond the optimal limit of a particular species adversely influence fish health by increasing the metabolic rate oxygen consumption and the invasiveness and virulence of pathogens which in turn may cause a variety of pathophysiological disturbances that can lead to the death of the species (Gordon 2005; Dalvi et al. 2009). Low environmental temperatures show profound immunosuppressive effects on ectothermal animals like fish (Bly et al. 1986).

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Abstract

Temperature plays significant roles in the life of poikilothermic aquatic animal fish. The physiological responses of Clarias batrachus (Linnaeus 1758) magur (80.605.34 g) at different temperatures were observed. Fish were acclimated at 25 C for 21 days and were exposed at 10 15 20 25 30 and 35 C temperatures. Blood and muscle samples were analysed after 12h and 7 days of reaching the assigned temperatures. Significantly (P0.05) higher mortality of fish was found in 10 C treatment compared to the other groups. At 10 C 50 fish died within 5 days. Serum protein was significantly (P0.05) higher in fish exposed at 15 C compared to the other treatments. Myeloperoxidase and reduced glutathione were significantly (P0.05) higher in fish exposed at 30 C and 25 C respectively compared to the other groups. Nitric oxide synthase was significantly (P0.05) higher in fish maintained at 25 C and 30 C compared to the other treatments after 12h and 7 days of exposure respectively. Thiobarbituric acid reactive substance was significantly (P0.05) higher in fish exposed at 10 and 15 C compared to others after 12h and 7 days of exposure respectively. Lowering of temperature adversely affected physiological processes of magur. Introduction Among the various physical factors influencing the aquatic environment temperature is of great importance and it plays a critical role in the life of aquatic poikilotherms. Temperature is considered as an abiotic master factor (Fry 1971; Brett 1979). Physiological processes of fish such as food consumption digestion immunity etc. are influenced by water temperature. Five major effects of temperature on fish physiological processes are controlling masking limiting directing and acting as a lethal agent (Fry 1947). Temperatures beyond the optimal limit of a particular species adversely influence fish health by increasing the metabolic rate oxygen consumption and the invasiveness and virulence of pathogens which in turn may cause a variety of pathophysiological disturbances that can lead to the death of the species (Gordon 2005; Dalvi et al. 2009). Low environmental temperatures show profound immunosuppressive effects on ectothermal animals like fish (Bly et al. 1986).

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Item Type:	Article
AGROVOC Term:	Clarias batrachus
AGROVOC Term:	Physiological response
AGROVOC Term:	Water temperature
AGROVOC Term:	Aquatic animals
AGROVOC Term:	Mortality
AGROVOC Term:	Serum protein
AGROVOC Term:	Glutathione
AGROVOC Term:	Nitric oxide
AGROVOC Term:	Stocking density
AGROVOC Term:	Body weight
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23684

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