Aquaculture America 2020

February 9 - 12, 2020

Honolulu, Hawaii

EFFECT OF DIETARY LINOLEIC ACID, EICOSAPENTAENOIC ACID AND DOCOSAHEXAENOIC ACID ON THE GROWTH AND FILLET FATTY ACID PROFILE OF OLIVE FLOUNDER Paralichthys olivaceus

 
Sang-Min Lee* ,  Esther Kim  and Seong-Mok Jeong
 
Department of Marine Biotechnology
Gangneung-Wonju National University
Gangneung 25457, Korea
smlee@gwnu.ac.kr
 

This study was conducted to investigate the effects of different dietary lipid sources on the growth, feed utilization, body composition and tissue fatty acid profile of olive flounder Paralichthys olivaceus. Five isonitrogenous and isocaloric diets were formulated by adding various lipid sources including soybean oil (SO), eicosapentaenoic acid triglyceride (EPATG) and ethyl ester (EPAEE) forms, docosahexaenoic acid triglycerides (DHATG) and a 1:1 blend of soybean oil and DHATG. Triplicate groups of fish (6.8±0.01 g) were fed one of the experimental diets to apparent satiation twice daily for 8 weeks. Fish fed the DHATG diet had the highest growth, protein efficiency ratio and feed efficiency values which were significantly higher than those fed the SO and EPAEE diets. Whole body proximate composition and somatic parameters were not influenced by the dietary treatments. Muscle of fish fed with SO diets were rich in 18:1n-9, 18:2n-6 and 18:3n-3, whereas those of fish fed with EPATG, EPAEE and DHATG diets were rich in n-3 polyunsaturated fatty acids (HUFA). These findings indicated that the inclusion of n-3HUFA oils in olive flounder feed could be beneficial for the fish while simultaneously increasing the concentration of beneficial n-3HUFA in fish fillets destined for the human consumer.