Cost effective medium for the laboratory culture of live feed micro algae

Abstract

Extracts of the green seaweed Ulva lactuca promoted the growth and the multiplication of three species of micro algae, Tetraselmis gracilis, Isochrysis galbana and Chaetoceros calcitrarzs 250-325% more than those cultures supplemented with vitamins (B, and B,,). When these microalgae were cultured in seawater supplemented with varying levels of extracts of garden soil and Ulva lactuca, Isochrysis galbana and Tetraselmis gracilis registered 16% and 58% increase in growth respectively and 19% decrease in growth by Chaetoceros. The results are discussed in the light of preparations of a low cost effective and ready to use recipe for the mass culture of these live feed organisms.