Document Type : (original research)
Authors
1
Animal Science Research Institute of Iran, Agricultural Research, Education and Extension Organization, Karaj, Iran
2
Department of Fisheries, Azad Shahr Branch, Islamic Azad University, Azad Shahr, Iran
3
Persian Gulf and Oman Sea Ecology Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research Education and Extension Organization, Bandar Abbas, Iran
4
Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
5
Persian Gulf Mollusks Research Station, Persian Gulf and Oman Sea Ecology Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research Education and Extension Organization, Bandar-e- Lengeh, Iran
6
Iranian Shrimp Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education & Extention Organization, Bushehr, Iran
10.22034/AEJ.2021.307562.2650
Abstract
This study was carried out to investigate the effects of macroalgae Padina australis and Gracilaria pygmaea extracts on growth performance and blood parameters of juvenile Common carp (Cyprinus carpio). Animals were randomly divided into four groups (initial weight 5 g); control group (basal diet without extracts), and three groups were fed with basal diet supplemented with 5 g/kg Padina australis, 5g/kg Gracilaria pygmaea and 2/5 g/kg Padina australis + 2/5 g/kg Gracilaria pygmaea for 8 weeks. Fish were hand fed to apparent satiation 3 times a day and for 8 weeks. Results showed that growth factors (final fish weight, specific growth rate, weight gain, condition factor and feed conversion) in fish fed with diet containing macroalgal extracts (Padina australis, Gracilaria pygmaea and Padina australis + Gracilaria pygmaea) was significantly higher than the control group. Hemoglobin level and the weight of hemoglobin in a red blood cell in fish fed with diet containing macroalgal extracts (Padina australis, Gracilaria pygmaea and Padina australis + Gracilaria pygmaea) was significantly higher than the control group. The control group had a higher level of triglycerides and cholesterol compared to the groups fed with diets containing macroalgal extracts (Padina australis, Gracilaria pygmaea and Padina australis + Gracilaria pygmaea).
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