IN VIVO STUDIES OF [1-14C] FATTY ACID METABOLISM IN ARTEMIA (Artemia sp.) AND ROTIFER (Brachionus plicatilis)
2021
Reis, Diana | Pérez, José Antonio | Ramírez, D. | Acosta, Nieves | Jerez, Salvador | Navarro, Juan Carlos | Rodríguez, C.
Despite the recent progresses in the development of inert diets, the rearing of early life stages of aquatic organisms still depends on the use of live feeds. Within live feeds, Artemia sp. and rotifer (Brachionus plicatilis) are widely used in the rearing of marine larvae due to their high availability and acceptance by a large number of species. Nonetheless, both live preys naturally possess low content of long-chain polyunsaturated fatty acids (LC-PUFA) such as 20:5n-3 (EPA), and 22:6n-3 (DHA), which are essential fatty acids (EFA) for proper development of marine fish larvae. In this respect, enrichment of live preys is used to tailor its lipid composition towards the nutritional needs of marine larvae. To improve the design of live prey enrichment protocols, it is advisable to unveil the metabolic fate of fatty acids (FA) during the enrichment process. Therefore, the aim of the present study was to determine the in vivo capability of Artemia sp. metanauplii and rotifers to incorporate and transform unsaturated FA.
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