Abstract
The effect of dietary supplementation of leaves and seeds of Achyranthes aspera on rohu, Labeo rohita fingerlings was evaluated. Three experimental diets containing 0.25 (D1) and 0.5% (D2) leaves and 0.5% (D3) seeds of A. aspera and control diet (D4) without plant ingredients were formulated. After 45 days of feeding, rohu were immunized with 20% chicken RBC. Tissue and blood samples were collected on days7, 14 and 21 after immunization. Dietary supplementation significantly (P<0.05) increased the average weight and specific growth rate of rohu. Serum lysozyme, myeloperoxidase, hemagglutination titer and nitric oxide synthase activities were significantly (P<0.05) higher in D3 compared to others. This group was followed by D2 and D1. Significantly (P<0.05) lower lipid and protein oxidations were found in D3 compared to others. This group was followed by D2 and D1. In hepatopancreas, lysozyme C, lysozyme G, tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) expressions were up-regulated while interleukin-10 (IL-10) expression was downregulated. In anterior kidney, lysozyme C, lysozyme G and IL-10 expressions were upregulated while TNF-α and IL-1β expressions were down-regulated. The dietary inclusion of leaves and seeds of A. aspera enhanced the growth, improved immune system and reduced oxidative stress of rohu.
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