نوع مقاله : مقاله پژوهشی
نویسندگان
دانشگاه آزاد واحد لاهیجان
چکیده
چکیده
در این تحقیق به بررسی تأثیرات استفاده از رنگدانه های طبیعی همچون چغندر قرمز Beta vulgaris)) و روناس (Rubia tinctorum) و ترکیب این دو رنگدانه بر روی ماهی آنجل سفید (Pterophyllum scalare) مورد مطالعه قرار گرفت. این بررسی بر روی 76 ماهی آنجل سفید با وزن متوسط 5/0±12/1 گرم در 5 گروه شامل 5 و 10 گرم روناس در کیلو گرم غذا،5و10 گرم چغندر قرمز در هرکیلو گرم غذا و گروه ترکیبی (5گرم روناس به اضافه 5گرم چغندر قرمز) در هر کیلوگرم غذا و گروه شاهد. غذا دهی 3 بار در روز و به میزان 10% وزن بدن ماهیان انجام پذیرفت. در پایان توسط دوربین دیجیتال با شرایط کاملا یکسان عکسبرداری انجام شد و میزان رنگپذیری پوست ماهی از طریق سیستم Lab نرم افزار فتوشاپ مورد بررسی قرار گرفت. همچنین برخی از شاخص های رشد مانند SGR, FCR, BWI مورد بررسی قرار گرفت. در پایان دوره ماهیان تغذیه شده با خوراک حاوی چغندرقرمز g/kg۱۰ رنگ زرد بارزتری نسبت به گروه شاهد و سایر گروه ها داشته است (05/0p
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