Vitamin E

Izquierdo, Marisol; Betancor, Mónica B.

doi:10.1002/9781119005568.ch8

Cited by 8 publications

(17 citation statements)

References 176 publications

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“…As mentioned above, vitamin E is an essential dietary nutrient for fish, so the lack of vitamin E can have a negative impact on the fish growth (Izquierdo & Betancor, ). In the present study, the fish fed the vitamin E un‐supplemented diet had a lower WG.…”

Section: Discussionmentioning

confidence: 99%

“…Vitamin E is the generic term for all molecules which presents the biological activity of α‐tocopherol, its main function is to protect unsaturated fatty acids against free radical‐mediated oxidation (Hamre, ). Vitamin E has been proved to be an essential dietary nutrient in all fish and has a significant effect on the antioxidant activity of fish (Izquierdo & Betancor, ). A summary on the vitamin E requirements of fish indicated that the levels vary from 25 to 200 mg vitamin E/kg of the diet (NRC, ).…”

Section: Introductionmentioning

confidence: 99%

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Dietary vitamin E requirement of sub‐adult genetically improved farmed tilapia strain of Nile tilapia (Oreochromis niloticus) reared in freshwater

Jiang

Shao

et al. 2019

Aquacult Nutr

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A two‐factor orthogonal test was conducted to determine the dietary vitamin E (VE, dl‐α‐tocopheryl acetate) requirement for sub‐adult GIFT strain of Nile tilapia (Oreochromis niloticus) at two lipid levels, and evaluate its effect on antioxidant responses. A basal diet containing 60 or 130 g/kg of soybean oil was supplemented with 0, 20, 40, 60, 120 and 240 mg VE/kg, respectively. Each diet was fed to three replicate groups of tilapia with initial weight (80.3 ± 0.7) g for 10 weeks. Results showed that the weight gain, feed efficiency and hepatic VE retention of fish were significantly increased by the increased VE in diets. In groups with 60 and 130 g/kg lipid, fish fed diets supplemented with VE had higher serum superoxide dismutase (SOD) and catalase activity, and lower malondialdehyde content than fish fed the VE un‐supplemented diet (p < .05). The proximate composition of fish had no significant difference in the group with 130 g/kg lipid, whereas crude lipid and ash content were significantly affected by dietary VE in the group with 60 g/kg lipid. Based on broken‐line regression analysis, dietary VE requirement to support the maximum weight gain and serum SOD were 43.2–45.8 and 66.0–76.1 mg/kg in diets with 60 and 130 g/kg lipid, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dietary vitamin E requirement of sub‐adult genetically improved farmed tilapia strain of Nile tilapia (Oreochromis niloticus) reared in freshwater

Jiang

Shao

et al. 2019

Aquacult Nutr

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“…In this study, no gross signs of vitamin E or vitamin C deficiency, such as muscle dystrophy, liver damage or cranial deformities, could be found in the meagre larvae, denoting that neither of these vitamins were at critically low levels in the diets. Since liver constitutes the main lipid storage organ in fish and α‐tocopherol is the principal fat‐soluble antioxidant, vitamin E deficiency frequently damages this organ (Izquierdo & Betancor ). Besides, the abundance in the liver of haeme containing enzymes that favour oxidation, promotes the occurrence of pathological alterations in this organ (Hamre ), such as hepatocyte hypertrophy, inflammation, ceroidosis and necrosis (Thorarinsson, Landolt, Elliott, Pascho & Hardy ; Montero, Tort, Izquierdo, Socorro, Robaina, Vergara & Fernández‐Palacios ).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Vitamin E is recognized as the major hydrophobic chain‐breaking antioxidant that prevents the propagation of free radical reactions in membranes and lipoproteins (Izquierdo & Betancor ). The specific location of vitamin E as a structural component of cell membranes confers this vitamin a particular role in the control of peroxidation of HUFA (Izquierdo & Betancor ). Early nutritional studies have showed that vitamin E is essential for marine fish larvae (Watanabe, Takashima, Ogino & Hibiya ; Murai & Andrews ; González, Izquierdo, Salhi, Hernández‐Cruz & Fernández‐Palacios ).…”

Section: Introductionmentioning

confidence: 99%

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The importance of dietary HUFA for meagre larvae (Argyrosomus regius; Asso, 1801) and its relation with antioxidant vitamins E and C

et al. 2015

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Despite the interest of meagre (Argyrosomus regius) as a fast-growing candidate for Mediterranean aquaculture diversification, there is a lack of information on nutrition along larval development. Importance of highly unsaturated fatty acids (HUFA) and the antioxidant vitamins E and vitamin C has not been investigated yet in this species. Six diets with two levels of HUFA (0.4% and 3% dw), two of vitamin E (1500 and 3000 mg kg À1 ) and two of vitamin C (1800 and 3600 mg kg À1 ) were fed to 15 dah meagre larvae. Larval growth in total length and dry body weight was significantly lowest in larvae fed diet 0.4/150/180 and showed few lipid droplets in enterocytes and hepatocytes and lower HUFA contents than the initial larvae. Increase in dietary HUFA up to 3%, significantly improved larval growth and lipid absorption and deposition. Besides, among fish fed 3% HUFA, increase in vitamin E and vitamin C significantly improved body weight, as well as total lipid, 22:6n-3 and n-3 fatty acids contents in the larvae. Thus, the results showed that 0.4% dietary HUFA is not enough to cover the essential fatty acid requirements of larval meagre and a high HUFA requirement in weaning diets is foreseen for this species. Besides, the results also pointed out the importance of dietary vitamin E and C to protect these essential fatty acids from oxidation, increase their contents in the larvae and promote growth, suggesting high vitamin E and C requirements in meagre larvae (higher than 1500 and 1800 mg kg À1 for vitamin E and vitamin C respectively).

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Nutritional supplements and fish health

Gatlin

Yamamoto

2022

Fish Nutrition

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Vitamin E

Cited by 8 publications

References 176 publications

Dietary vitamin E requirement of sub‐adult genetically improved farmed tilapia strain of Nile tilapia (Oreochromis niloticus) reared in freshwater

Dietary vitamin E requirement of sub‐adult genetically improved farmed tilapia strain of Nile tilapia (Oreochromis niloticus) reared in freshwater

The importance of dietary HUFA for meagre larvae (Argyrosomus regius; Asso, 1801) and its relation with antioxidant vitamins E and C

Nutritional supplements and fish health

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