A comparative study on the fatty acid profiles of total lipid, neutral and polar lipids in the liver and muscle ofCapoeta sieboldii(Steindachner, 1864) andCapoeta baliki(Turan, Kottelat, Ekmekçi, Imamoğlu, 2006) from Tödürge lake (Sivas, Turkey)

Abstract

The fatty acid compositions of the total lipid, neutral and polar lipid fractions in the liver and muscle of Capoeta sieboldii and Capoeta baliki from Tödürge Lake were determined. Major fatty acids found in total lipid (TL) and neutral lipid (NL) in liver and muscles were C16:0, C16:1 n-7, C18:1 n-9, C18:1 n-7, C20:4 n-6, C20:5 n-3, C22:5 n-3, and C22:6 n-3. Beside these acids, C18:0 was another notable fatty acid in polar lipid (PL) fraction of the tissues investigated. The n-3/n-6 ratio, which is an indicator of health benefi ts of fi sh oils, was between 2.89 (PLs of liver) and 5.84 (PLs of muscle) in C. baliki, while it was found between 1.43 (PLs of liver) and 2.52 (NLs of muscle) in C. sieboldii. C. baliki was the excellent species in terms of polyunsaturated fatty acid (PUFA) levels in TL (43.92% in muscle) and PLs (52.94% in muscle) and C22:6 n-3 amounts (docosahexaenoic acid; DHA) were responsible for these high percentages. These results suggest that Capoeta species investigated have high nutritive value in terms of polyunsaturated fatty acids for human nutrition.

Determination of Fatty Acid Profiles and Esterase Activities in the Gills and Gonads of Vimba vimba (L., 1758)

“…In the present study, the n-3/n-6 ratios were determined to be between 1.53 in the NLs of the gills and 0.95 in the TLs of the gonads. These values were in accordance with the values obtained for the liver, muscle and intestine of V. vimba [17], but lower than those determined for other fish species [7,[23][24][25]. AI values were between 0.44 (TLs) and 0.53 (NLs) in the gills, and between 0.57 (PLs) and 0.60 (TLs) in the gonads.…”

“…In this context, patterns of groups of fatty acids in the gills and gonads confirm this data. At the same time, fish species such as Perca fluviatilis, Salmo trutta macrostigma, Capoeta baliki and Capoeta sieboldii had higher n-3 PUFA levels in muscles and the liver [7,23,24]. From this point of view, pattern of particular groups of fatty acids might depend on the fish species and/or tissues under investigation.…”

“…One of the most stable elements in fish fatty acid composition studies is C16:0 in SFA. C14:0 and C18:0 are other fatty acids contributing SFA levels in fish tissues, but much less than C16:0 [7,23]. The gills and gonads of V. vimba had substantial percentages of C16:0.…”

“…It is known that fish do not show the same fatty acid profiles at all times of the year because individual fatty acids, especially EPA and DHA, are affected by factors such as the season, reproductive cycles, geographical region, and maturity stage [6]. Many fish species that cannot be mentioned here have been investigated in terms of the parameters mentioned above, and the recent trend is to investigate complete fatty acid composition covering neutral and polar lipid fractions to determine the quality of fish oils [7]. Polar lipids, as amphipathic molecules, constitute the functional and organizational structure of biological membranes.…”

“…This function has a vital role for fish to adapt to changing water temperatures. Neutral lipid fractions, including triacylglycerol, function as lipid depots in fish [7,8].…”