Abstract
A feeding experiment was conducted to evaluate the effects of bulk zinc (B-Zn) and zinc nanoparticles (Zn-NPs) on survival, growth, compositions of amino acid and fatty acid, and nonspecific immune responses of the freshwater prawn, Macrobrachium rosenbergii post larvae. The B-Zn (size 10 μm) and Zn-NPs (size 50 nm) were supplemented separately with the basal feeds of M. rosenbergii at 60 mg/kg and feed without supplementation of any Zn source was served as a control. M. rosenbergii were fed these feeds for 90 days and the results showed that significant (P < 0.05) improvements in survival, growth, feed intake, specific growth rate, essential amino acids, unsaturated fatty acids, nonspecific immune responses (total haemocytes and differential haemocytes count) of M. rosenbergii fed with B-Zn and Zn-NPs supplemented feeds when compared to control. Among these Zn sources, Zn-NPs supplemented feeds fed prawns showed significantly (P < 0.05) better performance than that of B-Zn and control. Hence, present study suggests that the 60 mg/kg Zn-NPs can be supplemented with basal feeds of M. rosenbergii for regulating better survival and growth.
Published Version
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