نوع مقاله : سایر
نویسندگان
1 گروه علوم درمانگاهی، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز
2 گروه پاتوبیولوژی، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Biofloc technology system that be done by adjusting the ratio of C/N in the water and increases the density of heterotrophic microorganisms are used to improve the farmer interests. At this study the effects of different ratios of carbon to nitrogen in intensive culture of common carp on growth and health performance was evaluated . for this purpose, a total of 420 healthy common carp with an average weight of 40 ±5.9 (SDِ±Mean) Were divided into four treatments with three replications include A(15:1), B(20:1),C(25:1) and D(control) . The fish were reared for 90 days . Biometery and sampling was carried at one- month interval. Growth performance and fish health indicators, including Appearance, including color fish, Parasitic and fungal infections, deformities and behavioral characteristics (Respiratory, appetite and swimming) and gill structures, liver, kidney and skin were evaluated. The results showed that the index for the treatment of Biofloc was significantly better than the control treatment(P<0.05). Although an exact growth parameters evaluated showed no significant difference among the three treatments of biofloc. Among the health of the fish has been studied, significant changes were not observed in these studies and fish in these condition could be raised with relative health and any tissue lesions and protozoan pathogen was not found in microscopic studies
کلیدواژهها [English]