Larval nutrition - a nutritional perspective In: Winter School on Vistas in Marine Biotechnology 5th to 26th October 2010

Vijayagopal, P and Gopakumar, G (2010) Larval nutrition - a nutritional perspective In: Winter School on Vistas in Marine Biotechnology 5th to 26th October 2010. [Teaching Resource]

Text Vistas in Marine Biotechnology_2010_Chp 22.pdf Download (42kB)

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
Uncontrolled Keywords:	Nutrition
Subjects:	Fish and Fisheries > Fish Nutrition Eggs and Larvae
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 11:16
Last Modified:	09 Feb 2023 11:16
URI:	http://eprints.cmfri.org.in/id/eprint/16700

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