Preetha, K and Vijayan, K K (2010) World of microalgae - scope of bioprospecting In: Winter School on Vistas in Marine Biotechnology 5th to 26th October 2010. [Teaching Resource]
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Abstract
Fish naturally contain high levels of HUFA i.e., docosahexaenoic acid (22:6n-3), eicosapentaaenoic acid (20:5n-3) in their body tissues and juvenile marine fish require 0.5 to 1% (n- 3) HUFA as dry weight. 5-21% substitution of triacylglycerol fish oil, present either as a natural constituent of fish meal, or as added fish oil meets this requirement. Problems in altricial fish are 1. Marine fish larvae grow more rapidly than juveniles. 2. Natural diets of marine fish larvae are rich in phospholipids rather than triacylgcerol and, 3. The ratio of 22:6(n-3): 20:5 (n-3) in phospholipids naturally consumed is ca. 2:1 whereas this ratio in triacylglycerols in fish oil is less than or equal to 1:1. Thus the marine larval fish feeds based on conventional fish oils with ratios of 22:6 (n-3): 20:5(n3) less than or equal to 1:1 are sub-optimal, either by not providing 22:6(n-3) or by providing an excess of 20:5(n-3). Over emphasis of (n-3) HUFA has resulted in the neglect of arachidonic acid (20:4n-6) as a dietary essential fatty acid for marine fish and the role of monounsaturated fatty acids as major energy yielding nutrients in fish.
| Item Type: | Teaching Resource |
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| Uncontrolled Keywords: | Microalgae |
| Subjects: | Biochemistry > Bioprospecting Algae > Algal nutrition Algae |
| Divisions: | CMFRI-Kochi > Marine Biotechnology, Fish Nutrition and Health Division Subject Area > CMFRI > CMFRI-Kochi > Marine Biotechnology, Fish Nutrition and Health Division CMFRI-Kochi > Marine Biotechnology, Fish Nutrition and Health Division Subject Area > CMFRI-Kochi > Marine Biotechnology, Fish Nutrition and Health Division |
| Depositing User: | Arun Surendran |
| Date Deposited: | 09 Feb 2023 09:27 |
| Last Modified: | 09 Feb 2023 09:27 |
| URI: | http://eprints.cmfri.org.in/id/eprint/16701 |
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