Comparison of growth performance of live feed microalgae and rotifer (Brachionus sp.) under different feeding medium in outdoor culture condition

Live feed is the basic food source and nutrient security for successful seed production of any commercially important aquaculture species fishes, mollusks crustaceans. Both plant animal originated aquatic microscopic organisms are generally termed as live food. They items in early stages (larval stage) life cycle due to small sizes, easy digestibility enriched nutrients. The Nannochloropsis sp.; Nannochlorum sp. Tetraselmis rich with relatively high content essential fatty acids comparison other marine algae. Likelihood, rotifer Brachionus ideal item brackishwater finfish mud crab larvae rearing its special features like rapid reproduction, slow movement, suitable size digestion by newly hatched larvae. present study report on growth performance (microalgae rotifer) outdoor culture condition. was conducted at hatchery complex Bangladesh Fisheries Research Institute, Brackishwater Station, Paikgacha, Khulna. In condition pattern obtained three microalgae were sp.> Highest average 6.87×106±1.97×106, 6.91×106±1.69×106 6.23×106±1.53×106 observed sp., respectively trial 3. Average (Brachionus sp.) found highest 189±18.10 ind./ml combined media yeast lowest 119.67±17.60 noticed baker's media. contains more energy among all but carry level protein. protein 56.3±0.18% microalgae+fish oil enrichment So, research finding suggests that, treatment T3 would be best recommendations culture.