Lipid classes and fatty acid compositions of wild and cultured sweet smelt Plecoglossus altivelis muscles and eggs in Korea
B.Y. Jeong, S.K. Moon, W.G. Jeong, T. Ohshima-2000
Fisheries Science, 66 (4) : 716-724
(from Current Contents)
Abstract :
Lipid classes and fatty acid compositions of the
muscles and eggs of wild and cultured sweet smelt in Korea from different
habitats and fish culture farms were compared. Non-polar lipid (NL) content
was in proportion to total lipid (TL) content and higher in the cultured
fish muscles and eggs than in the wild fish. Phospholipid (PL) content
showed almost no difference between the wild and cultured fish muscles. The
fish eggs contained approximately three times as much PL as the fish
muscles. The prominent NL classes of the fish muscles were triglyceride (TG)
and free sterol (ST), and additionally, sterol ester (SE) was one of the
prominent NL classes in the fish eggs. Each of the cultured fish muscles or
eggs had proportions higher in TG and lower in ST compared with those of
wild fish, respectively. These NL class proportions in fish muscles showed
almost no difference in association with their wild habitats, fish culture
farms as well as sex, while those in the fish eggs differed significantly.
The PL class proportions of the fish muscles were similar in all samples,
except those of the fish cultured in Miryang City. The wild fish muscles
were rich in 16:1n-7, 18:3n-3 and 20:5n-3, whereas the fatty acid
proportions showed almost no differences between fish habitats. The cultured
fish muscles were rich in 18:1n-9, 18:2n-6, and 22:6n-3, in which the fatty
acid proportions showed significant difference between fish farms due to
different diets.
(Gyeongsang Natl Univ, Inst Marine Ind, Tongyeong
650160, South Korea, e-mail: byjeong@gshp.gsnu.ac.kr)