Effect of dietary astaxanthin on growth and immune response of giant freshwater prawn Macrobrachium rosenbergii (de man)
2009
Mohanty, J. | Pillai, Bindu R. | Mohanty, S. | Kumar, Vijay | Sahoo, P. K.
Effects of dietary incorporation of astaxanthin on growth and selected immune parameters of freshwater prawn Macrobrachium rosenbergii were examined. Sub-adult M. rosenbergii were fed diets fortified with astaxanthin at 0 (control), 25, 50, 100 and 200 mg kg-¹ for a period of 28 days. Results revealed a significant increase (P<0.05) in specific growth rate of prawns fed 50, 100 and 200 mg kg-¹ astaxanthin enriched diet compared to the control diet. Among the immune parameters evaluated, phenoloxidase activity and total protein showed a significant increase (P<0.05) in prawns fed diets enriched with 50, 100 and 200 mg kg-¹ astaxanthin. The total haemocyte count was also significantly higher in prawns fed diets enriched with 50 and 100 and 200 mg kg-¹ astaxanthin. Total carotenoid content in muscle, exoskeleton and hepatopancreatic tissues showed a dose dependent increase. The present results showed that dietary incorporation of astaxanthin at 50, 100 and 200 mg kg-¹ level had significant positive effects on growth and immune response of M. rosenbergii.
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