A short note on the vitamin E requirement of Tilapia nilotica (Oreochromis niloticus)?effects on health and growth

1995 ◽  
Vol 11 (3-4) ◽  
pp. 375-377 ◽  
Author(s):  
W. Eleraky ◽  
G. Saleh ◽  
J. M. Gropp
Keyword(s):  
Vitamin E ◽  
Oreochromis Niloticus ◽  
Short Note ◽  
Tilapia Nilotica

scholarly journals Variabilidade genética de duas variedades de tilápia nilótica por meio de marcadores microssatélites

2007 ◽  
Vol 42 (4) ◽  
pp. 521-526 ◽  
Author(s):  
Angela Aparecida Moreira ◽  
Alexandre Wagner Silva Hilsdorf ◽  
Juliana Viana da Silva ◽  
Vânia Ribeiro de Souza
Keyword(s):  
Oreochromis Niloticus ◽  
Tilapia Nilotica

O objetivo desse trabalho foi avaliar a variabilidade genética de duas variedades de tilápia nilótica (Oreochromis niloticus), Chitralada e Red Stirling, e de suas progênies submetidas a programas de melhoramento genético, em sistemas intensivos de cultivo por meio de marcadores microssatélites. Foram utilizados 30 animais de cada variedade parental, 30 animais híbridos (CH), provenientes do cruzamento entre as variedades Chitralada e Red Stirling, e 30 animais (RR) provenientes do cruzamento entre os parentais da variedade Red Stirling. Utilizaram-se cinco microssatélites: UNH104, UNH108, UNH118, UNH222 e UNH231. Observaram-se baixos índices de endogamia, com valores de F IS negativo para as duas variedades e seus cruzamentos. Verificou-se diferença genética entre as duas variedades, obtida pelo cálculo do índice de fixação de alelos (F ST = 0,131 e R ST = 0,130). As variedades parentais Chitralada e Red Stirling apresentaram 24,4% de distância genética, o que se refletiu na presença de vigor híbrido com 23,5% de incremento em rendimento no plantel CH.

scholarly journals Effect of Giving Different Doses of Vitamin E in Feed to the Level of Gonad Maturity of Tilapia (Oreochromis niloticus)

2021 ◽  
Vol 5 (2) ◽  
pp. 64
Author(s):  
Gunawan Tarigan ◽  
I Wayan Arthana ◽  
Dewa Ayu Angga Pebriani
Keyword(s):  
Vitamin E ◽  
Oreochromis Niloticus ◽  
Egg Quality ◽  
Reproductive Hormones ◽  
Fish Cell ◽  
Maturity Stage ◽  
Maturity Level ◽  
Gonad Maturity ◽  
Gonad Somatic Index ◽  
Different Doses

One of the nutrients that can be given to brood feed fish to improve reproductive performance and egg quality is vitamin E. Vitamin E has a very important role in increasing fish reproduction because vitamin E functions as an antioxidant that can maintain the presence of fatty acids and prevent fat oxidation in the fish cell membrane and can accelerate the secretion of reproductive hormones. This study aims to determine the effect of vitamin E in feed at different doses on the level of gonad maturity of tilapia. The research was conducted at the Fisheries Laboratory of the Faculty of Marine and Fisheries, Udayana University from July to August 2020. The samples of fish tested were tilapia (Oreochromis niloticus) obtained from the Teratai fishing pond, Sanur Bali. Vitamin E used was Ovagrow Vit E with a vitamin E content of 50%. The CRD method (completely randomized design) was used with four treatments and three replications. The doses of vitamin E that were mixed into the feed were 0, 100, 300, and 500 mg/kg of feed. The results showed that the administration of vitamin E mixed in the feed at different doses had a significant effect on the achievement of gonad maturity level, gonad somatic index (GSI), and Fecundity (P <0.05). Provision of vitamin E at a dose of 300 mg/kg of feed was the best dose for ripening tilapia gonads. The gonad maturity level developed up to maturity stage IV, the GSI value was (3.56 ± 0.46) and the fecundity value was (1379 ± 289).

Effect of rosemary extract and vitamin e on lipid peroxidation and the quality during chilling and frozen storage of fried Nile tilapia fillets (Oreochromis niloticus)

2021 ◽  
Vol 3 (5) ◽  
pp. 01-03
Author(s):  
Ibrahim Mohamed
Keyword(s):  
Lipid Peroxidation ◽  
Vitamin E ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Food Industry ◽  
Frozen Storage ◽  
Quality Attributes ◽  
Rosemary Extract ◽  
Processed Meat ◽  
Synthetic Antioxidants

Antioxidants are added to fresh and processed meat to prevent lipid oxidation, retard development of off-flavors, and improve color stability. In the food industry, they can be divided into natural and synthetic antioxidants. Synthetic antioxidants have been confirmed for their toxicological and carcinogenic effects. Thus, the food industry now chooses natural products over synthetic ones. This study was carried out to investigate the effect of Rosemary extract (R.E.) and vitamin E on the quality of fried fillets of Nile tilapia (Oreochromis niloticus) during chilling and frozen storage. Fillets of Nile tilapia were treated with (R.E.) 0.1%, 0.2%, 0.3% and Vitamin E 0.1% then stored for 5,10 and 15 days at 4±1°C and for three months at -18±2°C. Then chemical tests including Peroxide value (PV), Thio-barbituric acid (TBA), Tri-methylamine-nitrogen (TMA-N) and Total volatile base-nitrogen (TVB-N) were done to evaluate the preservative effect of (R.E.) and vitamin E during storage. The TBA and PV increased in all treatments due to lipid peroxidation. Results showed that TMA-N,TVB-N, value of (R.E.) and vitamin E treated samples were significantly lower than those of the control samples (P<0.05). Results of our investigation revealed that R.E. retarded oxidative changes in chilling and frozen fried fillets of Nile tilapia whereas R.E. 0.1%, 0.2% and vitamin E 0.1% were not as effective as R.E. 0.3% on oxidative stability. Best oxidation inhabitation results on chilling and frozen fried fillets of Nile tilapia was obtained when employing of R.E. The obtained results also showed that there was a significant (p<0.05) enhancement in sensory quality attributes of fried fillets of Nile tilapia; samples treated with R.E. and vitamin E Conclusion: The tested R.E. had a high effectiveness as antioxidative and antimicrobial should be utilized for extending the shelf-life through retarded the spoilage and enhancing quality attributes of fried fillets of Nile tilapia during chilling and frozen storage.

scholarly journals Efeito da vitamina C sobre o hematócrito e glicemia de alevinos de tilápia-do-nilo (Oreochromis niloticus) em transporte simulado

2007 ◽  
Vol 59 (4) ◽  
pp. 883-888 ◽  
Author(s):  
D. Okamura ◽  
F.G. Araújo ◽  
P.V.R. Logato ◽  
L.D.S. Murgas ◽  
R.T.F. Freitas ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Tilapia Nilotica

Avaliou-se o efeito do ascorbato sobre o hematócrito e glicemia em alevinos de tilápia nilótica (Oreochromis niloticus) submetidos à simulação de práticas relacionadas ao transporte. Foram utilizadas três dietas experimentais com diferentes níveis de vitamina C (16, 500 e 1000mg de vitamina C/kg), fornecidas durante os 14 dias anteriores à simulação do transporte que se estendeu por 14 horas. O tratamento que continha 16mg de vitamina C/kg foi o que apresentou a glicemia mais elevada logo após a simulação, 108,5mg/dl imediatamente após a simulação e 91mg/dl 12 horas após a simulação. A concentração de 1000mg de vitamina C/kg foi a mais eficiente no controle do aumento da glicemia, 94,6mg/dl imediatamente após a simulação e 74,4mg/dl 12 horas após a simulação. Para a concentração de 500mg de vitamina C/kg foram observados os níveis de 91,4mg/dl imediatamente após a simulação e 103,8mg/dl 12 horas após a simulação. Os valores do hematócrito não apresentaram variação significativa (P>0,05). A suplementação com 1000mg de vitamina C/kg por 14 dias anteriores ao transporte pode ser utilizada de forma profilática em alevinos de tilápia nilótica para amenizar o aumento da glicemia relacionado ao estresse.

Re-evaluation of the vitamin E requirements of juvenile tilapia (Oreochromis niloticus ✕ O. aureus)

2001 ◽  
Vol 72 (3) ◽  
pp. 529-534 ◽  
Author(s):  
S. Y. Shiau ◽  
L. F. Shiau
Keyword(s):  
Lipid Peroxidation ◽  
Vitamin E ◽  
Oreochromis Niloticus ◽  
Control Diet ◽  
Dietary Treatment ◽  
Dietary Lipid ◽  
Tocopheryl Acetate ◽  
Dietary Vitamin ◽  
Feeding Trial ◽  
Protein Deposition

AbstractA 10-week feeding trial was conducted to re-evaluate the level of dietary vitamin E (DL- α-tocopheryl acetate) that was adequate for juvenile tilapia Oreochromis niloticus ✕ O. aureus given diets containing two dietary lipid concentrations. Purified diets with eight levels of vitamin E (0, 25, 50, 75, 100, 150, 200, 400 mg/kg diet) at either 50 or 120 g lipid per kg were each given to three replicate groups of tilapia (mean weight: 0·69 (s.e.0·02) g) reared in a closed, recirculating system. Food efficiency and protein deposition were significantly (P < 0·05) higher in fish given 50 mg vitamin E per kg diet and 75 mg/kg diet in the 50 and 120 g lipid per kg groups respectively, compared with fish given the unsupplemented control diet. Mortality of fish was not affected by dietary treatment. Weight gain and liver microsomal ascorbic acid-stimulated lipid peroxidation data analysed by broken-line regression indicated that the optimum dietary vitamin E requirements in juvenile tilapia are 42 to 44 mg vitamin E per kg and 60 to 66 mg vitamin E per kg in 50 and 120 g lipid per kg diets, respectively.

scholarly journals Quality of polyunsaturated fatty acids in Nile tilapias (Oreochromis niloticus) fed with vitamin E supplementation

2012 ◽  
Vol 134 (1) ◽  
pp. 215-218 ◽  
Author(s):  
Rodrigo Diana Navarro ◽  
Fernanda Keley Silva Pereira Navarro ◽  
Oswaldo Pinto Ribeiro Filho ◽  
Walter Motta Ferreira ◽  
Marcelo Maia Pereira ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Vitamin E ◽  
Polyunsaturated Fatty Acids ◽  
Oreochromis Niloticus ◽  
Vitamin E Supplementation
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