Production of an indigenous micro algal concentrate from Nannochloropsis oculata (NANN CON): An alternate approach

Xavier, Biji and Megarajan, Sekhar and Ranjan, Ritesh and Balla, Vamsi and Padmajarani, S and Chinnibabu, B and Ghosh, Shubhadeep (2018) Production of an indigenous micro algal concentrate from Nannochloropsis oculata (NANN CON): An alternate approach. Marine Fisheries Information Service; Technical and Extension Series (238). pp. 7-12. ISSN 0254-380 X

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Nannochloropsis oculata is a marine micro algae used directly for green water larval rearing system and indirectly for rotifer culture in marine finfish hatchery. Difficulties in algal culture during summer months can be overcome by the production of microalgal concentrate which can be stored and used when required. Harvesting of micro algal biomass from the culture is considered as crucial step for the production of algal concentrate. The use of centrifugation is the effective method for harvesting microalgae and steps involved in the production of Nannochloropsis concentrate (NANN CON) is described in detail. Centrifugation which could accumulate a cell count of an approximately 30 billion/ml from 300 litres of N. oculata culture was the most efficient method as the cells in the concentrate retained shape and nutritional contents similar to cultured fresh microalgae. Chilled NANN CON preserved with 10% glycerol proved advantageous had more than 80% viable cells even after five months of storage. The preserved NANN CON is effective as feed for rotifer, algal inoculum and Green water larval rearing systems. The cost for production of NANN CON was ` 1158.46 per kilogram and in several aspects proved superior to other commercial products currently used.

Item Type: Article
Uncontrolled Keywords: Nannochloropsis oculata, rotifer, Green water
Subjects: Aquaculture
Aquaculture > Live Feed Culture
Divisions: CMFRI-Visakhapatnam
Depositing User: Arun Surendran
Date Deposited: 28 Dec 2019 09:58
Last Modified: 28 Dec 2019 09:58

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