Shalaby, A., Ghareeb, A., Abd El-Rahman, M., Abd El-Hamid, E. (2019). Effect of different levels of folic acid on the growth and some physiological aspects of Nile tilapia "Oreochromis niloticus". test, 9(3), 33-45. doi: 10.21608/eja.2019.19184.1008
Adel M. Shalaby; Amany A Ghareeb; Maaly M Abd El-Rahman; Eman A. A. Abd El-Hamid. "Effect of different levels of folic acid on the growth and some physiological aspects of Nile tilapia "Oreochromis niloticus"". test, 9, 3, 2019, 33-45. doi: 10.21608/eja.2019.19184.1008
Shalaby, A., Ghareeb, A., Abd El-Rahman, M., Abd El-Hamid, E. (2019). 'Effect of different levels of folic acid on the growth and some physiological aspects of Nile tilapia "Oreochromis niloticus"', test, 9(3), pp. 33-45. doi: 10.21608/eja.2019.19184.1008
Shalaby, A., Ghareeb, A., Abd El-Rahman, M., Abd El-Hamid, E. Effect of different levels of folic acid on the growth and some physiological aspects of Nile tilapia "Oreochromis niloticus". test, 2019; 9(3): 33-45. doi: 10.21608/eja.2019.19184.1008

Effect of different levels of folic acid on the growth and some physiological aspects of Nile tilapia "Oreochromis niloticus"

Egyptian Journal for Aquaculture
Article 2, Volume 9, Issue 3, September 2019, Pages 33-45    PDF (240.17 K)
Document Type: Research article
DOI: 10.21608/eja.2019.19184.1008
Authors
Adel M. Shalaby* 1; Amany A Ghareeb2; Maaly M Abd El-Rahman3; Eman A. A. Abd El-Hamid4
1Fish Reproduction and Physiology Department, Central laboratory for Aquaculture Research, Agriculture Research Center, Egypt
2Fish Reproduction and Physiology department, Central laboratory for Aquaculture Research, Agriculture Research Center, Egypt
3Fish Biology and Ecology Department, Central laboratory for Aquaculture Research, Agriculture Research Center, Egypt
4Limnology Department, Central Laboratory for Aquaculture Research, Agriculture Research Center, Egypt
Abstract
Folic acid is an essential vitamin in fish nutrition, and its lack or excessive intake may cause physiological disorders that reduce growth and production. Therefore, this study was conducted to evaluate the effects of different levels of folic acid (10, 20, 40, 80 and 160 mg/kg of dried rations) and compare it with the control group (0.0 folic acid) on the specific growth rate (SGR), weight gain (WG) and some physiological measurements in fingerlings of Nile tilapia; Oreochromis niloticus.
The experiment was designed in six groups in glass aquaria, each group in three replicates each with 10 fingerlings (20-30 g) after acclimation in laboratory conditions. Fish in each replicate was weighed and each group was fed with the processed feed to the extent of satiation twice a day for 8 weeks. At the end of the 8th week, fish weights were taken in each replicate separately to calculate the specific growth rate and weight gain. Blood samples were taken for physiological examinations.
Keywords
tilapia; Folic acid; Growth; physiology
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