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넙치(Paralichthys olivaceus) 사료 내 어유(Fish oil) 대체원으로써의 diacylglycerol 이용성 평가
오대한,김민기,윤관식,이경준 한국수산과학회 2019 한국수산과학회지 Vol.52 No.4
The objective of this study was to investigate the utilization of diacylglycerol (DAG) as a new dietary ingredient replacing fish oil in feed for juvenile olive flounder Paralichthys olivaceus. Fish oil based control diet (CON) was prepared and four other diets were formulated by replacing 50% of the fish oil in CON with one of five DAG: DAGL (1,3-lauryl glycerol) or DAGP (1,3-palmityl glycerol) in low or high concentrations (designated as DAGLL, DAGLH, DAGPL and DAGPH). Another diet was prepared replacing 100% of the fish oil in CON with a 1:1 mixture (DAGLP) of DAGL and DAGP. Olive flounder (13.4 g) were fed to apparent satiation, twice a day, for 12 weeks. Following the feeding trials, no significant differences were observed in growth performance, blood parameters and non-specific immune responses between CON and any of the DAG groups. Polyunsaturated fatty acid levels were not significantly affected by the inclusion of DAGs. Thus, DAGL or DAGP could be used to replace up to 50% of fish oil in fish feed without reducing growth performance, health or innate immunity. The replacement of up to 100% of dietary fish oil in olive flounder feed by DAGLP is also feasible.