Microalgae culture for hatcheries

Joseph, Shoji (2023) Microalgae culture for hatcheries. In: International Workshop cum Training on Fisheries and Aquaculture: African-Asian Rural Development Organization (AARDO). CMFRI Training Manual Series No. 35/2023 (35). ICAR- Central Marine Fisheries Research Institute, Kochi, pp. 197-209. ISBN 978-93-82263-62-3

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Abstract

Microalgae are phototrophic microorganisms, they capture solar energy and convert it into bioenergy, thereby providing certain potential and bioactive constituents. Bacteria and microalgae are vital components in aquatic ecosystems and they exhibit mutualistic relationships. Marine microalgae are varied, specialized unique, and vast groups of single-celled microorganisms that contain chlorophyll, which traps the energy from light and uses it to convert nutrients and carbon dioxide dissolved in the seawater into organic growth.. They are the primary producers and constitute almost a quarter of the world’s primary productivity (Lebeau and Robert, 2003). Unicellular marine microalgae are widely used as food in the hatchery production of commercially valuable fish and shellfish for various stages. The important components of microalgae are the diatoms, dinoflagellates, silico-flagellates (phyto-flagellates), coccolithophores, blue-green algae, and the ‘hidden flora’ the nanoplankton. Among these, the diatoms and phyto-flagellates are significant organisms since they form the primary link in the food chain of the sea. It is known that the success of any hatchery operation depends mainly on the availability of the basic food, the microalgae.

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