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World of microalgae - scope of bioprospecting In: Winter School on Vistas in Marine Biotechnology 5th to 26th October 2010

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Relation http://eprints.cmfri.org.in/16701/
http://eprints.cmfri.org.in/16686/
 
Title World of microalgae - scope of bioprospecting In: Winter School on Vistas in Marine Biotechnology 5th to 26th October 2010
 
Creator Preetha, K
Vijayan, K K
 
Subject Bioprospecting
Algal nutrition
Algae
 
Description 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.
 
Publisher ICAR- Central Marine Fisheries Research Institute
 
Date 2010
 
Type Teaching Resource
NonPeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/16701/1/Vistas%20in%20Marine%20Biotechnology_2010_Chp%2023.pdf
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]