مرکز منطقه ای اطلاع رساني علوم و فناوري

Abstract :

The live food organisms (rotifers, artemia, daphnia and copepods) are widely used in larviculture of freshwater-marine fish and crustaceans as the early larval diet. Nutritional quality of live food is a crucial factor survival and normal growth of many aquatic larvae because these prey organisms must supply energy and essential nutrients. While evaluated nutritional value of live organisms, not only fatty acid, vitamin and aminoacid, but other important component, like L-carnitine, should also be considered because of its growth promoting potential for fish of small size. Endogenous L-carnitine is quite variable in live food and depends on their physiological status and also the environmental factors, e.g. temperature, ligth intensity and photoperiod have significant effects on the L-carnitine levels in those organisms. The live food organism using in larval feding should be enriched due to their changable nutrient content according to digested food. The manipulations of nutrition and growth enhancement for producing higher quantity and quality live food are important challenges. L-carnitine might play metabolic role on live food and L-carnitine administration could enhance growth and reproduction of enriched these organisms by stimulating lipid catabolism. This article is aimed to provide information about enrichment with the L-carnitine of live food and its use in aquaculture.