Journals / Turkish Journal of Veterinary and Animal Sciences / 2006 / Cilt: 30 - Sayı: 1

Farklı düzeylerde DL $alpha$ -tocopherol acetate içeren diyet ile beslenen gökkuşağı alabalığı (Oncorhynchus mykiss W.)'nın fileto lipit kalitesine soğuk depolamanın etkisi

Effect of refrigerated storage on fillet lipid quality of rainbow trout (Oncorhynchus mykiss W.) fed a diet containing different levels of DL $alpha$ -tocopherol acetate

Pages
143–150
Publication Date
2022-11-05
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Finally, increasing the levels of $alpha$ -tocopherol acetate in the diets from 130 to 580 mg $kg^{-1}$ can slow down the level of lipid oxidation in fish fillets during refrigerated storage for 9 days at 1 ± 0.3 °C.

📌 3 Key Takeaways

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Objective & Hypothesis:The effect of refrigerated storage at 1 ± 0.3 °C on vitamin E level, fatty acid composition and lipid oxidation of fillets was studied in 3 groups of rainbow trout fed diets supplemented with increasing levels (100, 300 and 500 mg $kg^{-1}$ diet, respectively) of $alpha$ -tocopherol acetate as antioxidant.
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Key Findings & Data:Fish (initial mean weight 131 ± 1.0 g) were fed experimental diets for 58 days and reached a mean final weight of 299 ± 6.1 g, with growth differences among the 3 experimental groups being insignificant (P > 0.05).
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Conclusion & Impact:Finally, increasing the levels of $alpha$ -tocopherol acetate in the diets from 130 to 580 mg $kg^{-1}$ can slow down the level of lipid oxidation in fish fillets during refrigerated storage for 9 days at 1 ± 0.3 °C.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The effect of refrigerated storage at 1 ± 0.3 °C on vitamin E level, fatty acid composition and lipid oxidation of fillets was studied in 3 groups of rainbow trout fed diets supplemented with increasing levels (100, 300 and 500 mg $kg^{-1}$ diet, respectively) of $alpha$ -tocopherol acetate as antioxidant. Fish (initial mean weight 131 ± 1.0 g) were fed experimental diets for 58 days and reached a mean final weight of 299 ± 6.1 g, with growth differences among the 3 experimental groups being insignificant (P > 0.05). Fillet samples of fish were analyzed fresh (on day 0) or after storage at 1 ± 0.3 °C for 9 days. Lipid oxidation was measured using the thiobarbituric acid reactive substances (TBARS) test. Dietary vitamin E levels had a significant effect on fillet $alpha$ -tocopherol levels and TBARS values of fish by the end of 58 days of feeding. At the end of the feeding trial the fillet $alpha$ -tocopherol levels of fish fed E100, E300 and E500 diets were 30.1 ± 0.2, 34.3 ± 0.1 and 40.1 ± 0.1 mg $kg^{-1}$ , respectively, and the fillet $alpha$ -tocopherol levels were gradually decreased during the 9 days of storage at 1 ± 0.3 °C (P 0.05). However, during the refrigerated storage period, total saturated fatty acid (SFA) concentration slowly increased and total polyunsaturated fatty acid (PUFA) concentration slowly decreased (P < 0.05). Finally, increasing the levels of $alpha$ -tocopherol acetate in the diets from 130 to 580 mg $kg^{-1}$ can slow down the level of lipid oxidation in fish fillets during refrigerated storage for 9 days at 1 ± 0.3 °C.

Özet

Antioksidant madde olarak artan düzeylerde (sırasıyla 100, 300 ve 500 mg $kg^{-1}$ diyet) $alpha$ -tocopherol acetate ilave edilen diyetlerle beslenen üç grup gökkuşağı alabalığının filetolarındaki E vitamini düzeyine, yağ asidi kompozisyonuna ve lipit oksidasyonuna 1 ± 0,3 °C ' de yapılan soğuk depolamanın etkisi incelendi. 58 gün süresince deney diyetleri ile beslenen balıklar (ortalama başlangıç ağırlığı, 131 ± 1,0 g) deney sonunda ortalama olarak 299 ± 6,1 g ağırlığa ulaştı ve deney grupları arasındaki istatistiki fark önemsiz bulundu (P > 0,05). Balıkların fileto örnekleri taze (0. gün) ve 9 gün süresince 1 ± 0,3 °C 'de yapılan depolamadan sonra analiz edildi. Filetolardaki yağlarda meydana gelen oksidasyonu ölçmek amacıyla tiyobarbutirik asit reaktif (TBARS) testi kullanılmıştır. 58 günlük yemlemenin sonunda diyetlerdeki E vitamini düzeylerinin balıkların filetosundaki $alpha$ -tocopherol ve TBARS düzeylerini önemli derecede etkilediği görülmüştür. Deney sonunda E100, E300 ve E500 diyetleri ile beslenen balıkların filetolarındaki $alpha$ -tocopherol düzeyleri sırasıyla 30,1 ± 0,2, 34,3 ± 0,1 ve 40,1 ± 0,1 mg $kg^{-1}$ olarak bulunmuş ve bu oranlar 9 gün süresince 1 ± 0,3 °C 'de yapılan depolamada giderek azalmıştır (P 0,05). Ancak soğuk depolama sırasında toplam doymuş yağ asitlerinin (SFA) konsantrasyonu giderek artmış ve toplam çok doymamış yağ asitlerinden PUFA'ların konsantrasyonu giderek azalmıştır (P < 0,05). Sonuç olarak 130 mg $kg^{-1}$ 'dan 580 mg $kg^{-1}$ 'a doğru artan düzeylerde $alpha$ -tocopherol acetate içeren diyetlerle beslenen balıkların filetoları 9 gün süresince 1 ± 0,3 °C 'de depolanmış ve diyetlerde artan $alpha$ -tocopherol acetate miktarlarına karşın filetolardaki lipit oksidasyonunun azaldığı görülmüştür.

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Cite This Article

YILDIZ, M., GÜN, H., ŞENER, E. (2022). Farklı düzeylerde DL $alpha$ -tocopherol acetate içeren diyet ile beslenen gökkuşağı alabalığı (Oncorhynchus mykiss W.)'nın fileto lipit kalitesine soğuk depolamanın etkisi. Turkish Journal of Veterinary and Animal Sciences, Cilt: 30 - Sayı: 1, 143–150. https://ajindex.com/articles/615441

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