نوع مقاله : علوم جانوری
نویسندگان
گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، صندوق پستی: 487-49175
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Protein is the main constituent of the fish body thus sufficient dietary supply is needed for optimum growth. The feeding trial with four protein levels (38, 43, 48 and 53%) was conducted to evaluate the optimum protein of rainbow trout (Oncorhynchus mykiss). Three thousands fish with initial mean body weight, 0.5 g were fed frequently to satiation for 4 days a week for 65 days. Results showed that final weight and specific growth rate (SGR) were significantly affected by protein levels (P < 0.05). The best feed conversion ratio (FCR) was obtained with the fish fed 48% of protein, while there were no significant differences between this treatment and the 53% protein diet (P > 0.05). In conclusion, it appears that the diet containing 48% protein would be suitable for optimum growth of rainbow trout in the studied weight range.
کلیدواژهها [English]