scholarly journals Corn Husk Phenolics Modulate Hepatic Antioxidant Response in Nile Tilapia (Oreochromis niloticus) Exposed to Hypoxia

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6161
Author(s):  
José Andrés Galeana-López ◽  
Cynthia E. Lizárraga-Velázquez ◽  
Crisantema Hernández ◽  
Nayely Leyva-López ◽  
J. Basilio Heredia
Keyword(s):  
Feed Efficiency ◽  
Nile Tilapia ◽  
Farming Systems ◽  
Antioxidant Response ◽  
Control Group ◽  
Test Diet ◽  
Corn Husk ◽  
Intensive Farming ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Oxygen Conditions

The hypoxia conditions in intensive farming systems generate oxidative stress related to oxidative damage and mortality of fish. Corn husk meal (CHM), as a source of antioxidants, might modulate the antioxidant response and prevent the damage elicited by hypoxia. This study evaluated CHM’s ability to modulate a hepatic response in Nile tilapia exposed to hypoxia. A control and a test diet supplemented with 25 g CHM/kg feed were formulated. Ninety Nile tilapias (5.09 ± 0.55 g initial weight) were fed for 36 days to evaluate growth, feed efficiency, and hepatic antioxidant response (CAT, catalase; SOD, superoxide dismutase, and GPx, glutathione peroxidase) in normal oxygen conditions (normoxia). After the feeding trial (36 days), fish were exposed to hypoxia (1.5 ± 0.2 mg/L dissolved oxygen), and the hepatic antioxidant response was determined. There was no significant effect of CHM on growth and feed efficiency. The CAT activity was significantly increased in tilapias exposed to hypoxia and fed the test diet compared to the control group exposed to hypoxia. The SOD and GPx activities were unchanged in tilapias in normoxia and hypoxia conditions. Results suggest that CHM dietary supplementation promotes the antioxidant response in Nile tilapia exposed to hypoxia through CAT modulation.

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.

Digestive enzyme activity in the intestine of Nile tilapia (Oreochromis niloticus L.) under pond and cage farming systems

2016 ◽  
Vol 42 (5) ◽  
pp. 1259-1274 ◽  
Author(s):  
Juliana Ferreira Santos ◽  
Karollina Lopes Siqueira Soares ◽  
Caio Rodrigo Dias Assis ◽  
Carlos Augusto Martins Guerra ◽  
Daniel Lemos ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Digestive Enzyme ◽  
Farming Systems ◽  
Digestive Enzyme Activity ◽  
Nile Tilapia Oreochromis Niloticus

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

scholarly journals Effect of Blend Oils from Waste Paring Coconut and Candlenut and Selenium for Formulating of Feed-in Nile Tilapia and Production Parameters

2021 ◽  
Author(s):  
Kiki Haetami ◽  
Junianto Junianto ◽  
Iskandar Iskandar ◽  
Abun Abun
Keyword(s):  
Feed Efficiency ◽  
Nile Tilapia ◽  
Unsaturated Fatty Acids ◽  
Coconut Oil ◽  
Protein Ratio ◽  
Production Parameters ◽  
Randomized Design ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Protein Feed ◽  
Basal Ration

This study aims to get growth and feed efficiency of Nile tilapia (Oreochromis niloticus) with plant oils supplement from paring coconut (P.C.) and candlenut (C.N.) enrichment of Se in rations formula. The oil of P.C. was dominated by saturated fatty acid (SFA) lauric (42.67%), while the extract of C.N. was unsaturated fatty acids (UFA), linoleic (34.4%), and oleic (48.99%). The extract of P.C. and C.N. or mix oils added 4% in basal ration formula (28% crude protein (C.P.) with energy-protein ratio 8 kcal/kg). Completely Randomized Design (6 &times; 3) consists R1: basal ration; R2: basal formula with blend of paring coconut and candlenut oils (2% PC + 2% CN); R3: blend oils (R2) with trace additive Se; R4: 4% PC + Se; R5: 4% CN + Se; R6: control ration (32% CP). The result of production parameters showed that blend oils supplement enrichment Se 0.15 ppm in feed formula with ratio SFA: UFA = 1: 1 was the best growth rate equal with high protein feed. Feed efficiency ranged from 50.14-57.93% and protein efficiency ratio 1.72-2.06 both for CN oil (SFA: UFA = 1 : 2), paring coconut (SFA : UFA = 2 : 1) or blend oils (SFA : UFA = 1 : 1). Incorporation of blend oils with Se can be used for Nile tilapia fingerlings (&ge; 10 g). Paring coconut oil was trend increasing on feed efficiency for tilapia bigger stadium (&ge; 30 g).

scholarly journals The effect of adding molasses in different times on performance of Nile tilapia (Oreochromis niloticus) raised in a low-salinity biofloc system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohammad Hossein Khanjani ◽  
Morteza Alizadeh ◽  
Mohammad Mohammadi ◽  
Habib Sarsangi Aliabad
Keyword(s):  
Digestive Enzymes ◽  
Nile Tilapia ◽  
Stocking Density ◽  
The Body ◽  
Control Group ◽  
Survival Ratio ◽  
Hepatic Enzymes ◽  
Low Salinity ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Experimental Treatments

Abstract This study aimed to evaluate the effect of adding molasses in different times on water quality, growth performance, body biochemical composition, digestive and hepatic enzymes of Nile tilapia in the biofloc system. Tilapia fingerlings (1.53 ± 0.14 g) were distributed in five treatments include control, BFT24 (adding molasses to the tanks every 24 h), BFT48 (48 h), BFT72 (72 h), and BFT96 (96 h) and reared for 37 days in fiberglass tanks (130 L), with a stocking density of one fish per litre. The results showed that highest increase in biomass (740.12 g) and survival (98.97 %) were obtained in BFT24 treatment (P <0.05). The body composition was affected by the experimental treatments so that the highest protein content was obtained in the BFT72 (P<0.05). Digestive enzymes activities were significantly (P<0.05) higher in BFT treatments than the control group. The current study showed, higher biomass and survival ratio for Nile tilapia were observed in BFT24 treatment. The liver and digestive enzymes of Nile tilapia were affected by the different addition times of molasses to the rearing tanks.

scholarly journals Effect of pollution with lead, cupper, cadmium on gene expression pattern of liver GST and serum lysozymes in Nile tilapia (Oreochromis. niloticus)

2020 ◽  
Vol 21 (3) ◽  
pp. 53-60
Author(s):  
Enas Hassan ◽  
Gehad El-Sayed ◽  
Azza Hassan ◽  
Shaimaa Abd Elsalam
Keyword(s):  
Gene Expression ◽  
Uric Acid ◽  
Expression Pattern ◽  
Total Protein ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Gene Expression Pattern ◽  
Total Leukocyte Count ◽  
Control Group ◽  
Nile Tilapia Oreochromis Niloticus

Objective: This study was conducted to evaluate the influence of pollution with lead, copper, cadmium on the gene expression pattern of liver Glutathione-S-transferase and serum lysozyme in Nile tilapia (Oreochromis. niloticus). Design: Descriptive study. Fish: A Total of 120 Nile tilapia fish (Oreochromis niloticus) samples were collected from Lake Manzala, and drainage water at different localities. Procedures: Cd, Cu, and Pb concentrations residues within mid-dorsal muscle tissue, within gills, liver, and kidney were determined. Erythrocyte count, hemoglobin concentration, Packed Cell volume and other blood indices, as well as, total leukocyte count were measured. Biochemically, Alanine transaminase, Aspartate transaminase activities, total protein, creatinine, uric acid, lysozymes activity were estimated. GST gene expression was determined in the liver. Results: The results showed that Pb, Cu and Cd were bio accumulated at a higher level in the liver, kidney and gills of Nile tilapia fish (Oreochromis niloticus) from all sampling sites. The levels of the ALT and AST were increased, total protein and Albumin concentrations were decreased. Creatinine and uric acid were significantly (P≤ 0.05) increased in all groups (compared to the control group. Hematological parameters and lysozyme activity were decreased. Up regulation of the hepatic GST expression levels in Nile tilapia exposed to the heavy metals in comparison to the control value. Conclusion and clinical relevance: This study shows that lead, copper and cadmium were bio accumulated at higher concentration in liver, kidney, gills and muscles of Nile tilapia due to large industrial activities near locations of the sampling sites. Additionally, GST gene expression represents sensitive biomarker of aquatic pollution.

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