Effect of vitamin B2 deficiency on growth, mortality, and deformities of nile Tilapia, Oreochromis niloticus Linn.
2004
Arunee Sommani(Silpakorn University. Sanam Chandra Palace Campus, Nakhon Pathom (Thailand). Faculty of Science. Department of Biology) | Chanwut Vittayakul(Silpakorn University. Sanam Chandra Palace Campus, Nakhon Pathom (Thailand). Faculty of Science. Department of Biology)
Effect of Vitamin B2 deficiency on growth, mortality and deformities on Nile Tilapia juvenile was studied. Nile Tilapia juvenile average weight 1.2 grams were fed with two experimental diets. The two diets were completely vitamin diet (formula 1 diet) and vitamin B2 free diet (formula 2 diet) The experiments was conducted within 8 weeks. The results showed that fish fed by formula 1 diet grew faster than fish fed by formula 2 diet. The average weight of fish fed formula 1 and formula 2 diets were 7.32+-0.10 grams and 4.67+-0.10 grams, respectively. Mortality of fish fed formula 2 diet was significantly higher than fish juvenile fed formula 1 diet. Mortality of fish fed formula 2 diet and formula 1 diet, was occurred 53.33 percent and 6.67 percent respectively. The symptoms of fish fed vitamin B2 free diet were obviously observed in the third week with pronounced body color deformation, lack of appetite, solitary and died after that.
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