Effect of Diet on the Immune Response of Rainbow Trout (Salmo gairdneri)

1984 ◽  
Vol 41 (8) ◽  
pp. 1244-1247 ◽  
Author(s):  
Vicki S. Blazer ◽  
Richard E. Wolke
Keyword(s):  
Immune Response ◽  
Rainbow Trout ◽  
Control Diet ◽  
Serum Antibody ◽  
Peritoneal Macrophages ◽  
Salmo Gairdneri ◽  
Yersinia Ruckeri ◽  
Nonspecific Resistance ◽  
Commercial Diet ◽  
T Cell Migration

To compare the effect of diet on the immune response of rainbow trout (Salmo gairdneri), we maintained fish on either a commercial feed or a laboratory prepared (control) diet for 12–16 wk before antigenic exposure. The immune response to two antigens, sheep red blood cells (SRBC) and Yersinia ruckeri, was assessed. Both T-cell (migration inhibition factor) and B-cell (plaque-forming cell) responses to SRBC were measured. The plaque-forming cell response and the humoral (serum antibody) responses to Y. ruckeri were assayed. In addition, the phagocytic ability of peritoneal macrophages was assessed as a nonspecific resistance factor. We found that fish maintained on the commercial diet had a significantly lower immune response when compared with fish fed the control diet, although all fish appeared healthy and suffered no mortalities throughout the experiment. We indicate the importance of considering the effects of diet on immunity and disease resistance in future feed formulations.

scholarly journals Modulatory Effect of Dietary Copper Nanoparticles and Vitamin C Supplementations on Growth Performance, Hematological and Immune Parameters, Oxidative Status, Histology, and Disease Resistance Against Yersinia Ruckeri in Rainbow Trout (Oncorhynchus Mykiss)

2021 ◽  
Author(s):  
Mojtaba Delavari ◽  
Ahmad Gharaei ◽  
Javad Mirdar Harijani ◽  
Aida Davari ◽  
Abolhasan Rastiannasab
Keyword(s):  
Rainbow Trout ◽  
Vitamin C ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Copper Nanoparticles ◽  
Control Diet ◽  
Feed Additive ◽  
Control Group ◽  
Yersinia Ruckeri ◽  
Dietary Copper

Abstract The present study aimed to evaluate the effects of dietary copper nanoparticles (Cu-NPs) and vitamin C (VC) supplementations on rainbow trout (Oncorhynchus mykiss) juveniles. Six trial diets were supplemented with Cu-NPs and VC including 0/0 (T1, control diet), 0/250 (T2), 0/500 (T3), 2/250 (T4), 2/500 (T5), and 2/0 (T6) mg Cu-NPs/VC per kg diet. After the feeding trial for 60 days, the fish were challenged with Yersinia ruckeri and the survival rate was calculated for 15 days. Based on the data analysis, weight gain (WG), feed conversion ratio (FCR), specific growth rate (SGR), protein efficiency ratio (PER), lysozyme, alternative complement activity (ACH50), catalase (CAT), glutathione peroxidase (GPX), hematocrit (Hct) and mean corpuscular volume (MCV) were significantly (p < 0.05) affected by the Cu-NPs factor. Meanwhile, VC was a significant factor for hemoglobin (Hb) and superoxide dismutase (SOD) (p < 0.05). The results showed that the Cu-NPs and/or VC-supplemented diets improved WG, FCR, SGR, PER, lysozyme, ACH50, SOD, CAT, GPX, Hb, Hct, and MCV when compared with the control group (p < 0.05). The expressions of TNF-α, IL-1ß, IL-10, SOD, CAT, and GPX genes were significantly (p < 0.05) decreased in the fish fed on T3, T4, and T5 diets versus the control. In addition, the dietary Cu-NPs and VC supplementations significantly enhanced resistance against pathogens and led to the control of infection in rainbow trout. In conclusion, Cu-NPs and VC administered as feed additive at 2/250–500 mg/kg elevated the growth performance, antioxidant capacity, and health of rainbow trout.

Putative immune response of rainbow trout, Salmo gairdneri, to Diplostomum spathaceum infections

1986 ◽  
Vol 29 (1) ◽  
pp. 115-122 ◽  
Author(s):  
J. N. Stables ◽  
L. H. Chappell
Keyword(s):  
Immune Response ◽  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Diplostomum Spathaceum

The immune response of rainbow trout, Salmo gairdneri Richardson, to the haemoflagellate, Cryptobia salmositica Katz, 1951

1987 ◽  
Vol 10 (5) ◽  
pp. 395-402 ◽  
Author(s):  
S. R. M. JONES ◽  
P. T. K. WOO
Keyword(s):  
Immune Response ◽  
Rainbow Trout ◽  
Salmo Gairdneri

scholarly journals The effect of dietary composition and of insulin on gluconeogenesis in rainbow trout (Salmo gairdneri)

1977 ◽  
Vol 38 (3) ◽  
pp. 385-395 ◽  
Author(s):  
C. B. Cowey ◽  
M. De La Higuera ◽  
J. W. Adron
Keyword(s):  
Rainbow Trout ◽  
High Protein Diet ◽  
High Carbohydrate Diet ◽  
High Protein ◽  
Protein Diet ◽  
Salmo Gairdneri ◽  
Carbohydrate Diet ◽  
Commercial Diet ◽  
High Carbohydrate ◽  
Gluconeogenesis From Alanine

1. The activities at 15° of three gluconeogenic enzymes, d-fructose-1,6-diphosphate, 1-phosphohydrolase (EC 3.1.3.11), pyruvate carboxylase (EC 6.4.1.1) and phosphoenolpyruvate carboxykinase (4.1.1.32), were determined in liver, kidney, gill and muscle of rainbow trout (Salmo gairdneri) given a commercial diet. The results indicated that liver and kidney are the main sites of gluconeogenesis.2. Glucose formation from pyruvate was approximately 6 μmol/h per g wet weight at 15° in liver slices of trout given a commercial diet.3. Glucose diffusion space in trout was measured by the dilution principle after intravascular injection of a trace dose of [U-14C]glucose. Glucose space was found to be 13.7% of the body-weight. Gluconeogenesis in vivo amounted to approximately 45 μmol/kg body-weight per h.4. Intraperitoneally injected [U-14C]alanine was quickly converted to glucose. Maximal incorporation of alanine into glucose occurred 6 h after alanine administration.5. Rainbow trout given a high-protein diet gained in weight significantly during a 4-week period. Those given a high-carbohydrate diet did not make a significant weight gain over the same period. Gluconeogenesis from alanine was markedly reduced in fish given the high-carbohydrate diet. There was no significant difference in gluconeogenesis from alanine in fish given a high-protein diet and fish which were fasted for 21 d.6. Gluconeogenesis from alanine in trout was suppressed by intravenous injection of insulin. This effect was found both in trout given a high-protein diet and in fasted trout.

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