Dietary toxicity of colloidal silver nanoparticles in rainbow trout (Oncorhynchus mykiss)

S. A. Johari email; S. Hosseini

Dietary toxicity of colloidal silver nanoparticles in rainbow trout (Oncorhynchus mykiss)

2015

S. A. Johari email | S. Hosseini

To evaluate the dietary toxicity of colloidal silver nanoparticles (AgNPs) in rainbow trout, fishwere fed with diets containing 0, 20 and 50 mg.kg-1 of AgNPs for 5 weeks and then were fed freenanoparticles diet for a week. During this period, fish growth, as well as silver accumulation andelimination in liver, kidney, gastrointestinal tract and muscle were studied. According to our results,high doses of AgNPs in the fish diet decreased appetite and fish growth. In addition, feeding fishwith the diet containing AgNPs (especially at higher doses) increases the accumulation of silver infish tissues (silver concentration in liver> kidney> gastrointestinal tract > muscle). Although, a oneweekperiod considered for elimination of nanoparticles from fish tissues were not enoughhowever, caused some changes in the accumulation of silver in different organs of the fish.Observed effects due to fish feeding with diets containing silver nanoparticles, suggests thatnanoparticle ingestion could affect the fish health. Therefore, preventing the entry of these newmaterials into the food chain of aquatic organisms seems to be necessary.

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