Growth performance,haematology, antioxidant status,immune response and histology of common carp (Cyprinus carpio L.) fed biofloc grown on different carbon sources |
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| Authors: | Farideh Bakhshi Ebrahim H Najdegerami Ramin Manaffar Amir Tokmechi Kaveh Rahmani Farah Ali Shalizar Jalali |
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| Institution: | 1. Artemia & Aquaculture Research Institute, Urmia University, Urmia, Iran;2. Department of Biology, Faculty of Science, Urmia University, Urmia, Iran;3. Department of Fishery, Faculty of Natural Resources, Urmia University, Urmia, Iran;4. Department of Micrbiology, Faculty of Veterinary, Urmia University, Urmia, Iran;5. Department of Basic Sciences, Faculty of Veterinary, Urmia University, Urmia, Iran |
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| Abstract: | A 10 weeks trial was performed to investigate how different carbon sources (sugar beet molasses: SBM+BFT, sugar: S+BFT, corn starch: CS+BFT) along with control affect welfare status of common carp (Cyprinus carpio L.) fingerlings in biofloc‐based tanks. Three hundred healthy fingerlings (22.5 ± 0.2 g) were randomly distributed in 12 tanks (70 L) at a density of 8.02 kg/m3 (25 fish/tank). The fish in BFT treatments fed only 75% feeding rate of control. At the end of the experiment no differences were seen between the groups in case of growth performance, but the fish reared in CS+BFT had a significant lower food conversion ratio compared with the others (p < .05). Different carbon sources did not affect on haematological parameters (p > .05). Total serum protein and antibody concentration differed in treatments, and the highest values were found in S+BFT and CS+BFT treatments (p < .05). No significant differences were observed in case of lysozyme, superoxide dismutase and complement activity in treatments (p > .05), whereas the fish in BFT treatments showed a significant higher total antioxidant capacity and lower glutathione peroxidase than the control (p < .05). Different carbon sources resulted in no change in goblet and kupffer cells in intestine and liver respectively. The highest relative percentage survival was obtained in the CS+BFT and S+BFT (50%) in comparison with SBM+BFT (20%) treatment. The results obtained in this experiment, suggest that corn starch improves immune response, diseases resistance and histology of digestive and respiratory systems in carp fingerlings when used as a carbon source in zero water exchange system. |
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| Keywords: |
antioxidative
biofloc common carp different carbon sources immunity |
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