author(s)
Karni Bishnoi, ML Ojha, VP Saini and SK Sharma

abstract
The role of Aloe vera as fish diet supplement on growth and metabolism of Labeo rohita was evaluated. For this purpose six graded levels {0(D1), 100(D2), 200(D3), 400(D4), 600(D5) and 800(D6) g/kg)} of Aloe vera pulp were mixed in basal diet and fed (@ 4% of body weight per day) to experimental fish for a total period of 60 days. The supplementation of Aloe vera had significant impact on fish growth. The highest weight gain (60.410±0.996g), percent weight gain (275.700±14.683%), SGR (2.203±0.066%) and GCE (0.579±0.011) were recorded in D_4. The fishes fed with D₄ have also indicated better food utilization with lesser food conservation ratio (FCR) i.e. 1.726±0.032 as compared to other treatments. Similarly, the higher value of Amylase activity (27.480±0.068), Protease (28.456±0.255) and Lipase (0.6333±0.015) were also recorded in D₄. Therefore, it can be concluded that Aloe vera @400g/kg diet had significant role in improving rohu growth and metabolism.