The Effects of Microalgae as Live Food for (Rotifer) in Intensive Culture System.

is used to feed fish and crustacean larvae in the aquaculture industry. It is well established that the type of microalgae may influence rotifer production. This experiment was conducted to determine the effect of five different locally available microalgae species at Fisheries Research Institute (FRI), Kampung Pulau Sayak, Kedah, Malaysia on the instantaneous growth rate (μ) of rotifer. sp., sp., sp., sp., and sp. were used as feed at different algae densities (0.1, 0.3, 0.7 and 1.5 × 10 cells/ml) and culture volumes (20, 70 and 210 ml). At algae densities ranging from 0.3 to 1.5 × 10 cells/ml, an average μ value of more than 0.90 per day were recorded for all algae species. However, at density of 0.1 × 10 cells/ml, only sp. resulted in the significantly highest μ value compared with others ( < 0.05). In terms of volume, smaller culture volume of sp. (20 ml) showed significantly higher μ compared with higher volume (70 and 210 ml cultures).