Pyridoxine deficiency of grouper, <Emphasis Type="Italic">Epinephelus coioides</Emphasis>: physiological and biochemical alteration |
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Authors: | J?W?Huang L?X?Tian Z?Y?Du H?J?Yang Email author" target="_blank">Y?J?LiuEmail author |
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Institution: | (1) Institute of Economic Aquatic Animals, School of Life Sciences, Sun Yat-sen University, 135 Xingang West Street, Haizhu District, Guangzhou, 510275, Guangdong Province, The People’s Republic of China |
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Abstract: | Pyridoxine is essential for animals. The purpose of this study was to investigate the pyridoxine deficiency symptoms and the
fit dose of pyridoxine to keep normal physiological function in grouper, Epinephelus coioides. Graded levels of pyridoxine (0, 1, 2, 4, 8, 16, 32 mg pyridoxine kg−1 diet) were fed to grouper juveniles (14.83±0.31 g) for 8 weeks, and then some physiological and biochemical parameters were
measured. Pyridoxine deficiency symptoms such as anorexia, poor survival, convulsion, helically swimming and hyperirritability
were observed in fish fed the pyridoxine-deficient diet, and these fish also showed low whole blood haemoglobin level, liver
glutamic-pyruvic transaminase (GPT) and superoxide dismutase (SOD) activities. Slight symptoms of pyridoxine deficiency also
appeared among fish fed the diet with very low dose (1 mg pyridoxine kg−1 diet) of pyridoxine in 6 weeks. Broken-line regression analysis showed that the optimal pyridoxine levels for these fish
to keep normal survival, whole blood haemoglobin level, liver GPT and SOD activities were approximately 1.75, 1.87, 2.22 and
2.05 mg kg−1, respectively. |
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Keywords: | Epinephelus coioides glutamic-pyruvic transaminase (GPT) grouper haemoglobin pyridoxine deficiency superoxide dismutase (SOD) |
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