نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران
2 دانشیار گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، ایران
3 استاد گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران
4 استادگروه بهداشت و بیماری های آبزیان، دانشکده دامپزشکی، دانشگاه تهران، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Rainbow trout fish fed one of the diets containing fresh kilka oil with 50 mg kg-1 of vitamin E 1)without (control A, FO50) or 2)with hydrolyzed protein (4% replacement for fishmeal) (treatment B, FO50HP), 50 mg kg-1 vitamin E with oxidized oil 3)without (treatment C, OO50) or 4)with hydrolyzed protein (treatment D, OO50Hp), 250 mg kg-1 vitamin E with oxidized oil 5)without (treatment E, OO250) or 6)with hydrolyzed protein (treatment F, OO250HP) in a completely randomized design (six treatments and three replications) for eight weeks. The lowest FCR was in treatment B and the highest was in treatment E (P< 0.05). The amount of other growth indices were higher (P< 0.05) in treatments A and B than other treatments. The highest and lowest concentrations of alanin amino transferase (ALT) occurred respectively in treatment C and treatments A and B (P< 0.05), the highest and lowest concentrations of aspartate amino transferase (AST) occurred in treatments C and D and treatment B (P< 0.05), respectively. The highest neutrophil (Nut) and the lowest lymphosit (Lym) percentages were in treatment E while the vise versa were observed in treatment C (P< 0.05). The phagocytosis amount was highest in treatments C and D while it was the lowest in treatment A (P< 0.05). The fillet 14: 1n-9 concentration was the highest in treatment F while it was the lowest in treatment B (P< 0.05). The fillet 18: 0 content was the highest in treatment A and the lowest in treatment D (P< 0.05). Treatment D showed the highest fillet 20: 4n- 6 content while treatment F had the lowest content (P< 0.05). Accordingly, vitamin E (50 mg kg-1 diet) with hydrolyzed protein (as a substitute for fish meal by 4%) would be able to prohibit the damages resulting from oxidative stress in growing rainbow trout.
کلیدواژهها [English]