SS4.07 Lipids/Fatty Acids in Ecological Research
Date: Tuesday, June 11, 2002
Time: 4:15:00 PM
Location: Saanich
 
OlsenY, Norwegian Univ. Science and Technology, Trondheim, Norway, yngvar.olsen@vm.ntnu.no
Evjemo, J, O, Norwegian Univ. Science and Technology, Trondheim, Norway, Jan.Evjemo@vm.ntnu.no
Rainuzzo, J, R, SINTEF Fishery and Aquaculture, Trondheim, Norway, Jose.Rainuzzo@fish.sintef.no
Reitan, K, I, SINTEF Fishery and Aquaculture, Trondheim, Norway, Kjell.Inge.Reitan@fish.sintef.no
 
LIPID AND ESSENTIAL FATTY ACID REQUIREMENTS OF MARINE CARNIVORE PLANKTON
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The main efforts to measure EFA requirements of plankton are made for carnivore marine larvae during aquaculture research. The conceptual understanding of EFA requirements is however still inadequate. Species obviously exhibit variable requirements, and most studies report requirements in quantitative terms. A common figure reported for coldwater species of fish larvae is 2-4 mg HUFA/g dry feed, but values for single fatty acids are rarely re-ported. There are ample evidence that such quantitative figures are only valuable for older stages of larvae and that younger stages in fact has specific requirements for phospholipids with high percent n-3 HUFA, and DHA is most critical. %DHA of total fatty acids then becomes a better predictor. This is because the larvae are partly incapable of digesting lipids in the very early stages.