scholarly journals Recovery from Hypersaline-Stress-Induced Immunity Damage and Intestinal-Microbiota Changes through Dietary β-glucan Supplementation in Nile tilapia (Oreochromis niloticus)

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2243
Author(s):  
Chang Xu ◽  
Yantong Suo ◽  
Xiaodan Wang ◽  
Jian G Qin ◽  
Liqiao Chen ◽  
...  
Keyword(s):  
Intestinal Microbiota ◽  
Brackish Water ◽  
Oreochromis Niloticus ◽  
Basal Diet ◽  
Distribution Width ◽  
High Expectations ◽  
Increase Risk ◽  
Red Blood Cell Count ◽  
Hypersaline Stress ◽  
Immune Related Genes

Long-term exposure to hyperosmotic environments can induce severe immune damage and increase risk in tilapia breeding. As an effective immunoregulator, β-glucan has attracted extensive attention in nutritional research and given rise to high expectations of improving health status and alleviating organismal damage in tilapia, Oreochromis niloticus, in brackish water. In this study, an 8-week cultivation experiment was conducted on tilapia fed a basal diet or diets with β-glucan supplementation in freshwater (control) and brackish water. Growth performance, hematological aspects, immune cytokine expression, and the intestinal microbiota of tilapia were analyzed. The results indicated that supplementation with β-glucan significantly reduced the enlarged spleen of tilapia resulting from hypersaline stress. Tilapia fed β-glucan showed significantly-greater decreases in the red blood cell count, hematocrit, red cell distribution width, platelet count, and plateletcrit than those fed the basal diet. β-glucan significantly decreased the high expression of immune-related genes in the spleen induced by hyperosmotic stress. In the intestine, the high migration inhibitory factor-2 (MIF-2) and IL-1β gene expression induced by hypersaline stress was significantly reduced. β-glucan supplementation also significantly increased the abundance of beneficial microbiota such as Lactobacillus, Phycicoccus, and Rikenellaceae. Therefore, dietary β-glucan supplementation can significantly reduce spleen enlargement and improve immune function in tilapia in brackish water. β-glucan intake can also optimize the intestinal microbiota of tilapia in brackish water and improve fish health.

The influence of feeding CAVP on intestinal microbiota of tilapia (Oreochromis niloticus)

2019 ◽  
Vol 26 (3) ◽  
pp. 546
Author(s):  
Zhencong WU ◽  
Shasha ZHANG ◽  
Zhuan YANG ◽  
Hejian XIONG ◽  
Ying MA
Keyword(s):  
Intestinal Microbiota ◽  
Oreochromis Niloticus

scholarly journals Effects of starvation and subsequent re-feeding on intestinal microbiota, and metabolic responses in Nile tilapia, Oreochromis niloticus

2020 ◽  
Vol 17 ◽  
pp. 100370 ◽  
Author(s):  
Michael Essien Sakyi ◽  
Jia Cai ◽  
Jufen Tang ◽  
Emmanuel Delwin Abarike ◽  
Liqun Xia ◽  
...  
Keyword(s):  
Intestinal Microbiota ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Metabolic Responses ◽  
Nile Tilapia Oreochromis Niloticus

scholarly journals Influence of Camembert consumption on the composition and metabolism of intestinal microbiota: a study in human microbiota-associated rats

2004 ◽  
Vol 92 (3) ◽  
pp. 429-438 ◽  
Author(s):  
Christophe Lay ◽  
Malène Sutren ◽  
Pascale Lepercq ◽  
Catherine Juste ◽  
Lionel Rigottier-Gois ◽  
...  
Keyword(s):  
Intestinal Microbiota ◽  
Dairy Products ◽  
Basal Diet ◽  
Fermented Milk ◽  
Metabolic Characteristics ◽  
Human Microbiota ◽  
Gradient Gel Electrophoresis ◽  
Metabolic Activities ◽  
Temperature Gradient Gel Electrophoresis ◽  
Micro Organisms

The objective of the present study was to evaluate the consequence of Camembert consumption on the composition and metabolism of human intestinal microbiota. Camembert cheese was compared with milk fermented by yoghurt starters andLactobacillus caseias a probiotic reference. The experimental model was the human microbiota-associated (HM) rat. HM rats were fed a basal diet (HMB group), a diet containing Camembert made from pasteurised milk (HMCp group) or a diet containing fermented milk (HMfm group). The level of micro-organisms from dairy products was measured in faeces using cultures on a specific medium and PCR–temporal temperature gradient gel electrophoresis. The metabolic characteristics of the caecal microbiota were also studied: SCFA, NH3, glycosidase and reductase activities, and bile acid degradations. The results showed that micro-organisms from cheese comprised 105–108bacteria/g faecal sample in the HMCp group.Lactobacillusspecies from fermented milk were detected in HMfm rats. Consumption of cheese and fermented milk led to similar changes in bacterial metabolism: a decrease in azoreductase activity and NH3concentration and an increase in mucolytic activities. However, specific changes were observed: in HMCp rats, the proportion of ursodeoxycholic resulting from chenodeoxycholic epimerisation was higher; in HMfm rats, α and β-galactosidases were higher than in other groups and both azoreductases and nitrate reductases were lower. The results show that, as for fermented milk, Camembert consumption did not greatly modify the microbiota profile or its major metabolic activities. Ingested micro-organisms were able to survive in part during intestinal transit. These dairy products exert a potentially beneficial influence on intestinal metabolism.

scholarly journals Dietary sodium requirement determined for juvenile hybrid tilapia (Oreochromis niloticus × O. aureus) reared in fresh water and seawater

2004 ◽  
Vol 91 (4) ◽  
pp. 585-590 ◽  
Author(s):  
Shi-Yen Shiau ◽  
Li-Shan Lu
Keyword(s):  
Weight Gain ◽  
Atpase Activity ◽  
Fresh Water ◽  
Oreochromis Niloticus ◽  
Polynomial Regression ◽  
Control Diet ◽  
Dietary Treatment ◽  
Basal Diet ◽  
Dietary Sodium ◽  
Whole Body

Two 8-week feeding trials were conducted to determine the dietary Na requirement for juvenile hybrid tilapia (Oreochromis niloticus × O. aureus) reared in fresh water and seawater. In each experiment, NaCl was added to the basal diet at 0, 0·5, 1, 2, 3, 5, or 7g Na/kg diet (fresh water) and at 0, 0·2, 0·5, 0·8, 1·2, 1·5, 2, or 3g Na/kg diet (seawater). Each diet was fed to three replicate groups of fish, individual fish initially weighing 0·69 (se 0·01) g, in a closed, recirculating rearing system. In fresh water, the tilapia fed the diet supplemented with 2g Na/kg diet had significantly (P<0·05) greater weight gain than the fish fed the diets supplemented with ≥3 and ≤0·5g Na/kg diet. Feed efficiency (FE) in fish generally followed the weight-gain pattern. Gill Na+–K+ ATPase activity was highest in the fish fed the diets supplemented with 1–3g Na/kg diet, followed by the fish fed the diet with 7g Na/kg diet and lowest in the fish fed the unsupplemented control diet. In seawater, the weight gain, FE and gill Na+–K+ ATPase activity in fish were not affected by the dietary treatment. Analysis by polynomial regression of weight gain, by broken-line regression of gill Na+–K+ ATPase activity and by linear regression of whole-body Na retention of the fish reared in fresh water, indicated that the adequate dietary Na concentration for tilapia is about 1·5g/kg diet. The present study also suggests that no dietary Na is required for tilapia reared in seawater.

Dietary Effect of Red Paprika Used to Enhance the Coloration of Red Tilapia (Oreochromis niloticus)

2021 ◽  
Vol 10 (1) ◽  
pp. 25
Author(s):  
M. H. Amiruddin ◽  
M. F. Norhalis ◽  
Sri Sumarwati ◽  
Y. Norma-Rashid
Keyword(s):  
Oreochromis Niloticus ◽  
Crude Protein ◽  
Dunaliella Salina ◽  
Descriptive Analysis ◽  
High Expectations ◽  
Red Tilapia ◽  
Color Quality ◽  
Aquaculture Industry ◽  
Bright Color

Red tilapia (Oreochromis niloticus) is one of the famous fish cultures in the aquaculture industry, especially in Malaysia. The appearance of redness makes the fish more attractive for customers to buy. Product appearance is one of the big criteria that customers choose when they buy food. Bright color effects give high expectations for high quality, nutritious, and healthy food. Therefore, to achieve quality products it is necessary to research how to improve the color quality of tilapia as desired by customers. The purpose of this study was to identify the dietary effect of red paprika used to enhance the coloration of red tilapia. This study is an experimental quantitative study. Red tilapia used as an experimental material was obtained from Freshwater Hatchery, University Malaysia Terengganu. A descriptive analysis was used to analyze the data in this study. This study shows that giving red paprika has an effect on the length and weight of red tilapia, where the highest length and weight gained (1.79 cm and 12.37 g) given red paprika 2% and the lowest length and weight gained (0.63 cm and 2.5 g) which given 4% red paprika. The findings of this study found that only 2% of red paprika treatment showed different growth performance. The crude protein, lipid, and moisture composition of tilapia were also higher at 2% red paprika treatment. Meanwhile, the highest composition of ash is feed with 4% red paprika content. The result of this research showed that the caudal and dorsal either muscle or fin showed the highest color at the fish which fed with 8% red paprika. The finding also found that 8% red paprika containing diet feed for six weeks could improve the coloration of the red tilapia. Future studies suggest the use of Dunaliella salina microalgae which is one of the richest sources of carotenoids used as dyes in food.

A Micro-Fabricated Electrical-Impedance-Based In-Flight Hematology Analyzer

2005 ◽  
Author(s):  
Bradley E. Layton ◽  
Brian G. Jamieson ◽  
Stephanie M. Sullivan
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Electrical Impedance ◽  
Cell Distribution ◽  
Blood Cell Count ◽  
Distribution Width ◽  
Red Blood Cell Count ◽  
Hematology Parameters ◽  
Microchannel Device ◽  
Red Blood Cell Distribution

We present a proposed method to obtain three hematology parameters: red blood cell count, mean red blood cell volume and red blood cell distribution width on a microfabricated microchannel device. Detection will be conducted with an impedance device, in a series of three or more filter beds with channel dimensions on the order of 2–7 μm wide × 5 μm high × 5–15 μm long, and a total device volume on the order of 1 μl.

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