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Growth performance, haematology, antioxidant status, immune response and histology of common carp ( Cyprinus carpio L.) fed biofloc grown on different carbon sources
Author(s) -
Bakhshi Farideh,
H Najdegerami Ebrahim,
Manaffar Ramin,
Tokmechi Amir,
Rahmani Farah Kaveh,
Shalizar Jalali Ali
Publication year - 2018
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13469
Subject(s) - cyprinus , biology , zoology , carp , common carp , feed conversion ratio , antioxidant , glutathione peroxidase , superoxide dismutase , starch , digestive enzyme , food science , amylase , biochemistry , fishery , endocrinology , fish <actinopterygii> , enzyme , body weight
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/m 3 (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.