Determination the impact of different dietary oil source and L-carnitine supplementation on hematological and immunological parameters of rainbow trout (Oncorhynchus mykiss)
Resumo
The aim of current study was to Determination the impact of different dietary oil source and L-carnitine supplementation on hematological and immunological parameters of rainbow trout. The number of 144 rainbow trout fish were fed by 4 dietary treatments ×2 randomized experimental factorial designs were used. Dietary treatments contained fish oil or soybean oil and two dietary levels of L-carnitine (0.5 or 1 g.kg-1) supplement and fish fed for 56 days feeding trials. At the end of experiment period, hematological and immunological parameters such as immunoglobulin M (IgM) concentration of fish blood were determined. Results of the current study showed that replacement of fish oil by soybean oil significantly increased blood hematocrit, red blood cell count, hemoglobin, phagocytosis activity and phagocytosed particles in comparison with fish oil dietary treatment (p<0.05). Dietary L-carnitine supplementation reduced heterophils and phagocytosed (p<0.05). The L-carnitine supplementation to fish oil diet increased lymphocyte and reduced IgM significantly (p<0.05). In conclusion we may demonstrate that use of different dietary oil sources with L-carnitine supplementation has beneficial effects on immunological response and hematological traits of rainbow trout.
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Referências
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