نوع مقاله : مقاله پژوهشی
نویسندگان
گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، البرز، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this study, in a completely randomized experimental design, the effects of different levels of duck weed (Lemna minor L.) meal in Caspian kutum diet on growth indices, carcass composition were investigated in an 8- week period. Different replacement levels of 0, 5, 10 and 15% were consisted the treatments in triplicates. Fingerlings with the mean initial weight of 2.02 ± 0.08 g were distributed in the experimental tanks. The results indicated that addition of duck weed powder in kutum diet more than 5% up to 15 caused a significant decrease (p < 0.05) in final body weight, specific growth rate and feed conversion ratio, conversely condition factor (CF) had not significant differences (p>0.05). It was concluded that with increasing the duck weed levels in diet, lipid, protein and ash contents did not show any significant differences in fish carcasses compared to control (p>0.05), however moisture increased with increasing the rates of duck weed in the diet. Getting the same results of growth indices in treatment containing 5% duckweed and control (p>0.05), confirmed that duck weed can be used at the level of 5% in the kutum diet.
کلیدواژهها [English]
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