Microaigae as primary producers for fry feeding of some marine fishes

Abstract

The isolation, maintenance and mass culture of microalgae are pre-requiste in feeding of fishes and m hatchery system throughout the world, although some genera such as Chlorella and Nannochloropsis, have been utilized experimentally as sources of human food. Microalgae as protein producers have general advantages over plants and animals due to their short generation time and their high protein content. Also, they can be easily genetically modified and cultivated independent of climatic changes.

Due to the ability of some algae to assimilate orgamc wastes, many trails were carried out to search for suitable coast-free (very cheap) organic waste, that gave a nearly similar or best growth parameters compared to the traditional basal synthetic media. In this thesis a trail was made to find a raw material that relpace the traditional significant media for culturing the two important microalgal organisms Chiarella salina and Nannochloropsis salina.

The growth and massive production of some important metabolites mainly protein, fatty acids and amino acids, were experimentally studied under culture conditions of the basal medium and two different wastes.