Aysel ŞAHAN, Oğuz TAŞBOZAN, Fatmagün AYDIN, Sevkan ÖZÜTOK, Celal ERBAŞ, Selçuk DUMAN, Leyla USLU, Filiz ÖZCAN
In this study, growth performance, haematological and non specific immune system parameters of Nile Tilap-ia (Oreochromis niloticus L., 1758) fed with diets which contain different levels of (0; 5.0; 7.5 and 10.0 g/kg) spirulina (Spirulina platensis) were investigated. At the end of the feeding experiment (75 days), total erythrocyte (RBC) and leukocyte counts (WBC), hematocrit (Hct), hemoglobin (Hb), leukocyte cell types (monocyte, lymphocyte, neutrophil, eosinophyl), RBC indices (MCV, MCH, MCHC) and phagocytic activity of blood taken from fish were determined in a certain period. According to the results, the addition of 5.0 g/kg spirulina in diet highly increased the phago-cytic activity of neutrophils and monocytes and also the addition of 7.5 g/kg of spirulina in diet increased the amounts of RBC and WBC. Consequently, these two levels of spirulina can be used as a protective agent against diseases by support-ing the fish immune system.
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