Review: Use of Highly unsaturated fatty acid (HUFA) in Ornamental Fish Feeds
Ornamental fish production, like all other segments of aquaculture, relies heavily on the successful spawning, hatching, and survival of larvae. Little is known about the nutrient requirements of most ornamental fish species. In many cultivars of fishes, such as Ornamental fish, especially in those new Ornamental fish species introduced to the aquaculture industry, the rate of fecundity is an important factor in the mass production of young fish and its final selection. Normally, improving the quality of feed used by breeders not only improves the quality of eggs and sperm, but also increases egg production. Gonadal development and fecundity are influenced by some of the nutrients present in the diet and are well documented in frequent spawning of broodstocks and short-term vitellogenic periods. The combination of lipids and fatty acids is one of the main determinants of the reproductive success of reproductive of Ornamental fish and the survival of the offspring. The presence of fats in the diet as a source of energy and essential fatty acids, sterols and phospholipids are considered as carriers of fat-soluble vitamins and are of considerable importance.
Environmental and dietary influences on highly unsaturated fatty acid biosynthesis and expression of fatty acyl desaturase and elongase genes in liver of Atlantic salmon (Salmo salar).
Highly unsaturated fatty acid (HUFA) synthesis in Atlantic salmon (Salmo salar) was known to be influenced by both nutritional and environmental factors. Here we aimed to test the hypothesis that both these effectors involved similar molecular mechanisms. Thus, HUFA biosynthetic activity and the expression of fatty acyl desaturase and elongase genes were determined at various points during an e...متن کامل
Peroxisome proliferator-activated receptor alpha is required for feedback regulation of highly unsaturated fatty acid synthesis.
Delta6 desaturase (D6D), the rate-limiting enzyme for highly unsaturated fatty acid (HUFA) synthesis, is induced by essential fatty acid-deficient diets. Sterol regulatory element-binding protein-1c (SREBP-1c) in part mediates this induction. Paradoxically, D6D is also induced by ligands of peroxisome proliferator-activated receptor alpha (PPARalpha). Here, we report a novel physiological role ...متن کامل
Histological and fatty acids changes in Caspian salmon (SalmotruttacaspiusKessler, 1877) fed diets with different levels of vitamins E and highly unsaturated fatty acids (HUFA)
In this study, the combined effect of different levels of dietary n-3 HUFAs with α-Tocopherol on changes in the structure of intestine and pyloric caeca and fatty acids profile of Caspian salmon, Salmotrutta caspius, fry (initial weight of 600 ± 25 mg for 10 weeks) were investigated. Six experimental diets containing three different dietary levels of n-3 HUFAs (Low: 1 + 0.5, DHA+ EPA, Med...متن کامل
Incorporation of dietary fatty acid in European sea bass (Dicentrarchus labrax) – A methodological approach evidencing losses of highly unsaturated fatty acids
A quantitative approach is presented to evaluate fatty acid incorporation in fish. Fatty acid composition of European sea bass juvenile was studied during an experiment using 6 isoproteic (54%) and isolipidic (18%) diets containing 0.23, 0.56, 0.72, 0.86, 1.01 and 1.86% DM n-3 highly unsaturated fatty acids (n-3 HUFA). Whole body fatty acid compositions were studied at the beginning and after 5...متن کامل
Peroxisome proliferator-activated receptor is required for feedback regulation of highly unsaturated fatty acid synthesis
6 desaturase (D6D), the rate-limiting enzyme for highly unsaturated fatty acid (HUFA) synthesis, is induced by essential fatty acid-deficient diets. Sterol regulatory elementbinding protein-1c (SREBP-1c) in part mediates this induction. Paradoxically, D6D is also induced by ligands of peroxisome proliferator-activated receptor (PPAR ). Here, we report a novel physiological role of PPAR in the i...متن کامل
n-3 HUFA have been used as feed in rnass cultivation of fish larva.2'5i Recentlydocosahexaenoicacid(DHA)wasrepertedtobethernosteffective n-3 HUFA for the growth of fish fry,6'7) but there is no known method to enrich zooplankton specifically with DHA, In this paper we report on enriching Euglena gracilis with eicosapentaenoic acid (EPA) and DHA, E. gracitis cells are about SO"m in size, contain...متن کامل
دوره 6 شماره 1
صفحات 64- 76
تاریخ انتشار 2019-07
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