ATANASOVA, R., L. HADJINIKOLOVA and L. NIKOLOVA, 2008. Investigations on the biochemical composition of carp fish (Cyprinidae) blood serum at conditions of organic aquaculture. Bulg. J. Agric. Sci., 14: 117-120
Having in mind that together with the productive parameters of fish production, its healthy status is of great significance, as well, then the purpose of this study is to investigate the biochemical composition of the blood serum of carp (Cyprinus carpio L.), bighead carp (Aristichtuys nobilis Rich.) and grass carp (Ctenopharyngo-don iddela Val.), grown by applying organic production technology. At the end of the vegetation period, the blood for biochemical analysis has been taken from 15 carps and bighead carps each and from 5 grass carps during each season investigated. At conditions of organic production technology it is the bighead carp and the grass carp, which have stood out as having higher values of the parameters Bactericidic Activity (BA), Total Proteins (TP) and Blood Glucose (BG), while for the carp they have been lower concerning the two remaining species, as well as concerning the physiological standards for this species. The species differentiation between the values of the indices traced at both variants of the experiment (with and without organic fertilization of the ponds) has been more clearly expressed. The effect of this technology has been reported in the grass carp, which has been expressed in higher absolute values of the parameters BA, TP and BG in organic fertilization ponds and authenticity of the differences (p<0.01).