AI Article Synopsis
- * The findings revealed that fish with no nitrite exposure (VE100-N) showed the best growth rates, while nitrite exposure significantly decreased hemoglobin and hematocrit levels, indicating harmful effects on fish health.
- * Higher vitamin E supplementation was found to reduce nitrite accumulation in the liver and muscle, suggesting it may help mitigate the negative impacts of nitrite exposure on growth and overall health by enhancing the body’s detoxification processes.
Article Abstract
This study investigated the effect of sub-lethal nitrite-nitrogen exposure on Labeo rohita. Fishes fed with different levels of vitamin E (VE) for 60days were exposed to nitrite for another 45days with same feeding regime. There were four treatment groups, viz., VE100-N, VE100+N, VE150+N and VE300+N. After 45days of exposure, lowest specific growth rate was observed in VE100+N and highest in VE100-N. Reno-somatic index and methaemoglobin reductase activity were significantly increased by nitrite exposure. Highest Hb and Hct were observed in VE100-N and significantly decreased upon nitrite exposure. Significant differences were observed in the activities of catalase and SOD as well as serum potassium and chloride levels among different treatments. However, serum calcium and osmolality was not significantly varied. Nitrite exposure caused marked increase in nitrite concentration in gill, liver and muscle. In liver and muscle dietary supplementation of higher amounts of VE found to reduce nitrite accumulation. It was noticed that nitrite exposure has adversely affected growth, haematological variables, ionic balance and dietary supplementation with additional amounts of VE found to overcome the adverse effects of nitrite-nitrogen. Detoxification of nitrite by methaemoglobin reductase system was enhanced by dietary supplementation of additional amounts of VE.
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| http://dx.doi.org/10.1016/j.cbpc.2013.05.009 | DOI Listing |
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