Cultivo de microalgas Isochrysis galbana y Nannochloropsis sp. para alimentación de larvas de peces marinos.

In the production of live food, represented mainly by microalgae, this seeks new techniques of culture media, with the substitution of traditional formulas, in favor of a reduce costs. Unconventional medium (industrial fertilizers) was used to produce the microalgae Isochrysis galbana and Nannochloropsis sp. from static cultures, reaching densities of 7,5 × 106 cells mL-1 of Nannochloropsis sp. in 1000 L and 0,265 × 106 cells mL-1 of I. galbana in 250 L. Exponential growth was achieved between 3 and 8 days, doubling the initial densities. It is suggested to harvest in short periods (up to 4 days), due to the proliferation of contaminants such as protozoa and bacteria, and decrease the quality of the cells over time. It is concluded that the medium designed for the enrichment of the crop, is a viable alternative for the production of microalgae, allowing to satisfy the food demand in the raising of marine fish larvae. [ABSTRACT FROM AUTHOR]