Incorporation dynamics of dietary vegetable oil fatty acids into the triacylglycerols and phospholipids of tilapia (Oreochromis niloticus) tissues (fillet, liver, visceral fat and gonads)

A. Szabo, M. Mézes, C. Hancz, T. Molnár, D. Varga, R. Romvári, H. Fébel

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13 Citations (Scopus)

Abstract

Tilapia (Oreochromis niloticus) previously reared on a commercial feed were fed three experimental diets with added 60g kg-1 of soybean (SO), linseed (LO) or fish oils (FO), for 6weeks. The final bodyweight (week 6) of fish was significantly lower when feeding the vegetable oils. At 0, 2, 4 and 6weeks, fillet, liver, visceral fat, testis and ovary triacylglycerols (TAG) and phospholipids (PL) were analysed for their fatty acid (FA) composition. The simple FA dilution model has been successfully applied to describe the incorporation of numerous dietary FAs into both tissue TAGs and PLs. Fillet PL FAs reacted more sensitively on the FAs of the SO and LO diets, when compared to the TAGs. Alterations of the hepatic TAG and PL fractions were minor and less predictable. Testicular PLs have been found to preferentially accumulate n3 FAs, in particular docosahexaenoic acid (DHA) (C22:6 n3). In contrast, ovarian TAGs showed a predominant accretion of oleic acid by the FO diet. The increased dietary unsaturation index (SO, FO) was found to augment hepatic in vivo lipid peroxidation, as assessed by the tissue malondialdehyde concentrations.

Original languageEnglish
JournalAquaculture Nutrition
Volume17
Issue number2
DOIs
Publication statusPublished - Apr 2011

Fingerprint

Tilapia (Cichlidae)
visceral fat
vegetable oil
fillets
Oreochromis niloticus
phospholipid
fish oils
fat
gonads
phospholipids
fatty acid
triacylglycerols
soybeans
fatty acids
soybean
liver
fish
diet
oil
linseed oil

Keywords

  • Fatty acid
  • Incorporation
  • Peroxidation
  • Phospholipids
  • Tilapia
  • Triacylglycerols
  • Vegetable oil

ASJC Scopus subject areas

  • Aquatic Science

Cite this

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title = "Incorporation dynamics of dietary vegetable oil fatty acids into the triacylglycerols and phospholipids of tilapia (Oreochromis niloticus) tissues (fillet, liver, visceral fat and gonads)",
abstract = "Tilapia (Oreochromis niloticus) previously reared on a commercial feed were fed three experimental diets with added 60g kg-1 of soybean (SO), linseed (LO) or fish oils (FO), for 6weeks. The final bodyweight (week 6) of fish was significantly lower when feeding the vegetable oils. At 0, 2, 4 and 6weeks, fillet, liver, visceral fat, testis and ovary triacylglycerols (TAG) and phospholipids (PL) were analysed for their fatty acid (FA) composition. The simple FA dilution model has been successfully applied to describe the incorporation of numerous dietary FAs into both tissue TAGs and PLs. Fillet PL FAs reacted more sensitively on the FAs of the SO and LO diets, when compared to the TAGs. Alterations of the hepatic TAG and PL fractions were minor and less predictable. Testicular PLs have been found to preferentially accumulate n3 FAs, in particular docosahexaenoic acid (DHA) (C22:6 n3). In contrast, ovarian TAGs showed a predominant accretion of oleic acid by the FO diet. The increased dietary unsaturation index (SO, FO) was found to augment hepatic in vivo lipid peroxidation, as assessed by the tissue malondialdehyde concentrations.",
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T1 - Incorporation dynamics of dietary vegetable oil fatty acids into the triacylglycerols and phospholipids of tilapia (Oreochromis niloticus) tissues (fillet, liver, visceral fat and gonads)

AU - Szabo, A.

AU - Mézes, M.

AU - Hancz, C.

AU - Molnár, T.

AU - Varga, D.

AU - Romvári, R.

AU - Fébel, H.

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AB - Tilapia (Oreochromis niloticus) previously reared on a commercial feed were fed three experimental diets with added 60g kg-1 of soybean (SO), linseed (LO) or fish oils (FO), for 6weeks. The final bodyweight (week 6) of fish was significantly lower when feeding the vegetable oils. At 0, 2, 4 and 6weeks, fillet, liver, visceral fat, testis and ovary triacylglycerols (TAG) and phospholipids (PL) were analysed for their fatty acid (FA) composition. The simple FA dilution model has been successfully applied to describe the incorporation of numerous dietary FAs into both tissue TAGs and PLs. Fillet PL FAs reacted more sensitively on the FAs of the SO and LO diets, when compared to the TAGs. Alterations of the hepatic TAG and PL fractions were minor and less predictable. Testicular PLs have been found to preferentially accumulate n3 FAs, in particular docosahexaenoic acid (DHA) (C22:6 n3). In contrast, ovarian TAGs showed a predominant accretion of oleic acid by the FO diet. The increased dietary unsaturation index (SO, FO) was found to augment hepatic in vivo lipid peroxidation, as assessed by the tissue malondialdehyde concentrations.

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