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Iranian J. of Fisheries Science، جلد ۲۱، شماره ۳، صفحات ۷۹۸-۸۱۵
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عنوان انگلیسی The effect of using hydrolyzed protein prepared from the viscera of rainbow trout in the fish diet on its shelf life at ambient temperature
چکیده انگلیسی مقاله The aim of this study was to investigate the effect of using hydrolyzed protein (HP) prepared from rainbow trout viscera in the fish diet on its shelf life in terms of chemical spoilage, bacterial load, and chemical composition at ambient temperature. HP was prepared from rainbow trout viscera using Alcalase (1.5% v/w, 55°C, pH 8.5). Five experimental diets were prepared to contain different levels of HP (0, 5, 10, and 20 g of HP/kg) and one diet containing 200 mg/kg of butyl hydroxytoluene (BHT). The prepared treatments were kept at 25±3°C for 18 weeks. The lowest mean TBA index was observed in the feeds with 20 g/kg of HP and Butylated hydroxytoluene (BHT) treatment (p˂0.05). The lowest Total volatile basic nitrogen (TVB-N) index was measured in HP-containing treatments until the 14th week (p˂0.05). The lowest bacterial count was measured in the HP-containing treatments from the 4th week to the end of the experiment (p˂0.05). The highest total protein content belonged to the HP-containing treatments. The highest fat content was recorded in HP-containing and BHT treatments (p˂0.05). According to the results, the addition of HP (20 g/kg) is recommended to maintain the quality of fish feed. 
کلیدواژه‌های انگلیسی مقاله chemical composition, Fish feed, Hydrolyzed protein, Total volatile basic nitrogen, Shelf life, Spoilage
نویسندگان مقاله S. Yeganeh |
Fisheries Department, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Km 9 Farah Abad Road, Sari, Iran.

A. Nosratimovafagh |
Fisheries Department, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Km 9 Farah Abad Road, Sari, Iran.

Sh. Javaherdoust |
Fisheries Department, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Km 9 Farah Abad Road, Sari, Iran.

نشانی اینترنتی https://jifro.areeo.ac.ir/article_127244_8aec8285195d9d6dc907c020fb5bd2ea.pdf
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