Utiliza este identificador para citar o vincular este elemento: http://hdl.handle.net/10553/36059
Títulos: Supplementation of arachidonic acid rich oil in European sea bass juveniles (Dicentrarchus labrax) diets: effects on leucocytes and plasma fatty acid profiles, selected immune parameters and circulating prostaglandins levels
Autores/as: Torrecillas, Silvia
Román, L.
Rivero-Ramírez, Fernando 
Caballero Cansino, María José 
Pascual, C.
Robaina, L 
Izquierdo, Marisol 
Acosta Arbelo, Félix 
Montero Vítores, Daniel 
Clasificación UNESCO: 251092 Acuicultura marina
Palabras clave: European sea bass
Arachidonic acid
Immune system
Leucocytes fatty acid profiles
Plasma prostaglandins
Fecha de publicación: 2017
Revistas: Fish and Shellfish Immunology 
Resumen: The main objective of this study was to assess the effects of graded levels of dietary arachidonic acid (ARA), supplemented from alternative sources, on fatty acid composition of plasma and head kidney leucocytes of European sea bass (Dicentrarchus labrax). For that purpose, sea bass juveniles were fed four diets containing graded levels of ARA as follows: 0.5% (ARA0.5), 1% (ARA1), 2% (ARA2) and 4% (ARA4) during 60 days. At the end of the feeding trial fatty acid profiles of plasma and head kidney leucocytes were analyzed. Besides, plasma prostaglandins levels, head kidney leucocytes respiratory burst activity; peroxidase activity and phagocytic index were assayed. Reducing dietary ARA levels below 1% markedly reduced European sea bass growth performance. However, fish fed diet ARA0.5 tried to compensate this dietary ARA deficiency by a selective deposition of ARA on plasma and head kidney leucocytes, reaching similar levels to those fish fed diet ARM after 60 days of feeding. Nevertheless, head kidney phagocytic capacity was reduced as dietary ARA content in relation not only to variations on membrane composition but also to changes on fish basal prostaglandins levels. Results obtained demonstrated the importance to supply the necessary quantity n-6 LC-PUFA, and not only n-3 LC-PUFA levels, in European sea bass diets, in relation to not only growth performance but also immune system function.
URI: http://hdl.handle.net/10553/36059
ISSN: 1050-4648
DOI: 10.1016/j.fsi.2017.03.041
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