C. Ibeas, J.R. Cejas, R. Fores, P. Badia, T. Gomez, A. Lorenzo
Hernandez-1997
Aquaculture, 150: 91-102
Abstract:
A feeding experiment was conducted to investigate the influence of
eicosapentaenoic acid (20:5n-3; EPA) to docosahexaenoic acid
(22:6n-3; DHA) ratio (EPA/DHA) of dietary lipids on growth and
fatty acid composition of gilthead seabream juveniles. Fish were fed
three diets containing the same amount of total n-3 highly unsaturated
fatty acids (n-3 HUFA) but different EPA/DHA ratios. No mortality
was observed during the feeding trial, but significant differences were
found in growth rate. The best growth rate and lowest hepatosomatic
index was obtained in fish fed a diet containing an EPA/DHA ratio of
2/1. The dietary lipid treatment had no effect on the EPA/DHA ratio
in neutral lipid of all the tissues studied. However, marked differences
in EPA/DHA ratio were found in polar lipids of the liver, muscle and
gills. It is concluded that, under the conditions employed, an
EPA/DHA ratio of 2/1 in the diet improves the condition of juvenile
gilthead seabream.
(Departamento de Biologia Animal, Facultad de Biologia,
Universidad de La Laguna, 38206 La Laguna, Tenerife, Canary
Islands, Spain)
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