Some Biochemical Studies On Blood Haemoglobin In Fish

the present work was planned to study some physico-chemical properties of haemoglobin of two species of Nile fresh water fishes including, NileCatfish (Clarias lazera) and Nile tilapia (Oreochromisniloticus) of both sexes, before and after ma t u r Lt y ,under farming conditions in Egypt. Moreover, studying thy biochemical variations in haemoglobin concentra-tion and haemoglobin components in relation to serum proteins under pollution of the environment withbacteria (Aeromonas hyDROPhila) or herbicide (Dichlo- b e n i L) , which can be used as a diagnostic tool infish.The results obtained could be summarized as follows:I-electrophoretic analysis:1- Ma t ure Catfish of both sexes showed only one haemoglobin component (Fig. 1 & 2).2-Immature Catfish of both sexes revealed an additional minor, cathodal haemoglobin component which represents 6.3% of the total haemoglobin,beside the main haemoglobin component whichaccount 88.6% of the total haemoglobin (Fig. 3).3- Ma t ure and immature Nile tilapia of both sexes showed three distinct haemoglobin components which differin charge and relative proportion (Fig. 4).