Abstract
A partial replacement of fish meal with Spirulina platensis (Sp) meal for the diet of juvenile shrimp Penaeus monodon (Fabricius) was analyzed for the growth and survival under laboratory condition. A total of five experimental diets were formulated with partial replacement of fishmeal by Sp meal, Sp-1 (14.3%), Sp-2 (28.6%), Sp-3 (42.8%), Sp-4 (57.14%), and the control diet (Sp meal free diet). The feeding trial was conducted for the period of 60 days. Juveniles fed with Sp meal supplemented diet showed significant (P less than 0.05) improvement of carcass composition (protein ratio and edible flesh). Higher growth and survival were obtained in P. monodon fed with Sp-3 diet, it was significantly (P less than 0.05) greater than the Sp meal free diet. The feeding efficiency (FE), specific growth rate (SGR) and survival (93.3%) of the shrimp was significantly (P less than 0.05) high in the Sp-3 diet. Survival rate was also higher in diet Sp-3 (42.8% substitution), but lower survival and growth rate observed in Sp-4 (57.14% substitution) and control diets. The Physico-chemical quality of the experimental tank water was better in Sp-3, and Sp-2 diet groups. This study recommended that Sp meal as alternative protein substitute of fish meal in shrimp diet.
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