Feed efficiency, nutrient retention and body composition of Nile tilapia, Oreochromis niloticus L., fed diets containing L-ascorbic acid, L-ascorbyl-2-sulphate or L-ascorbyl-2-polyphosphate

1998 ◽  
Vol 29 (7) ◽  
pp. 503-510 ◽  
Author(s):  
A E Abdelghany
Keyword(s):  
Ascorbic Acid ◽  
Body Composition ◽  
Oreochromis Niloticus ◽  
Feed Efficiency ◽  
Nile Tilapia ◽  
Nutrient Retention ◽  
Nile Tilapia Oreochromis Niloticus

Challenge with fumonisins B1 and B2 changes IGF-1 and GHR mRNA expression in liver of Nile tilapia fingerlings

2018 ◽  
Vol 11 (2) ◽  
pp. 237-245 ◽  
Author(s):  
S.C. Claudino-Silva ◽  
B. Lala ◽  
N.H.A.P. Mora ◽  
C.R. Schamber ◽  
C.S. Nascimento ◽  
...  
Keyword(s):  
Weight Gain ◽  
Mrna Expression ◽  
Feed Intake ◽  
Oreochromis Niloticus ◽  
Feed Efficiency ◽  
Nile Tilapia ◽  
Growth Hormone Receptor ◽  
Control Treatment ◽  
Insulin Growth Factor ◽  
Nile Tilapia Oreochromis Niloticus

Although fumonisins are identified as responsible for alterations in weight gain, little information is available on their effects on expression of growth-related genes, especially for Nile tilapia (Oreochromis niloticus) fingerlings. In this study, Nile tilapia fingerlings were treated with increasing levels of fumonisin B1 (FB1) and fumonisin B2 (FB2) (diets of 0, 20, 40, and 60 mg/kg) to evaluate their effects on weight gain (WG), feed intake (FI), feed efficiency (FE), growth hormone receptor (GHR) and insulin growth factor 1 (IGF-1) mRNA expression in liver of this fish. All variables were evaluated at 15 and 30 days of treatment. Diet containing 0 mg fumonisin/kg was used as control treatment. Treatment with 20, 40, and 60 mg fumonisin/kg of diet significantly reduced WG (P<0.0001) and FE (P<0.0001), while GHR and IGF-1 mRNA expression was reduced both at 15 and 30 days of treatment. Feed intake was not affected by diets in any of the evaluated periods. These results indicate that fumonisins (FB1 + FB2) affect the growth of Nile tilapia fingerlings through mechanisms that involve reduction of GHR and IGF-1 expression.

scholarly journals Agonistic behaviour and feed efficiency in juvenile Nile tilapia Oreochromis niloticus

Aquaculture ◽  
2019 ◽  
Vol 505 ◽  
pp. 271-279 ◽  
Author(s):  
Hugues de Verdal ◽  
Catherine Maeve O'Connell ◽  
Wagdy Mekkawy ◽  
Marc Vandeputte ◽  
Béatrice Chatain ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Feed Efficiency ◽  
Nile Tilapia ◽  
Agonistic Behaviour ◽  
Nile Tilapia Oreochromis Niloticus
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