Premium
The importance of dietary HUFA for meagre larvae ( Argyrosomus regius ; Asso, 1801) and its relation with antioxidant vitamins E and C
Author(s) -
El Kertaoui Najlae,
HernándezCruz Carmen María,
Montero Daniel,
Caballero María José,
Saleh Reda,
Afonso Juan Manuel,
Izquierdo Marisol
Publication year - 2017
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12890
Subject(s) - biology , vitamin e , larva , food science , vitamin , antioxidant , vitamin c , aquaculture , fatty acid , zoology , biochemistry , botany , fishery , fish <actinopterygii>
Despite the interest of meagre ( Argyrosomus regius ) as a fast‐growing candidate for Mediterranean aquaculture diversification, there is a lack of information on nutrition along larval development. Importance of highly unsaturated fatty acids ( HUFA ) and the antioxidant vitamins E and vitamin C has not been investigated yet in this species. Six diets with two levels of HUFA (0.4% and 3% dw), two of vitamin E (1500 and 3000 mg kg −1 ) and two of vitamin C (1800 and 3600 mg kg −1 ) were fed to 15 dah meagre larvae. Larval growth in total length and dry body weight was significantly lowest in larvae fed diet 0.4/150/180 and showed few lipid droplets in enterocytes and hepatocytes and lower HUFA contents than the initial larvae. Increase in dietary HUFA up to 3%, significantly improved larval growth and lipid absorption and deposition. Besides, among fish fed 3% HUFA , increase in vitamin E and vitamin C significantly improved body weight, as well as total lipid, 22:6n‐3 and n‐3 fatty acids contents in the larvae. Thus, the results showed that 0.4% dietary HUFA is not enough to cover the essential fatty acid requirements of larval meagre and a high HUFA requirement in weaning diets is foreseen for this species. Besides, the results also pointed out the importance of dietary vitamin E and C to protect these essential fatty acids from oxidation, increase their contents in the larvae and promote growth, suggesting high vitamin E and C requirements in meagre larvae (higher than 1500 and 1800 mg kg −1 for vitamin E and vitamin C respectively).