Author(s): A William, M Zakariah, VA Miana, MM Chana, I Wiam and PA Onyeyili

Abstract: The present study was designed to evaluate the haematological parameters of pond and river catfish (Clarias gariepinus) in Maiduguri, Borno state, Nigeria. Forty adult of C. gariepinus, twenty from pond and twenty from river were used for the present study. The haematological features have been used widely in vertebrate animals including man. The application of haematological procedures is very important for aquaculturist in assessing fish health as it monitors stress. The mean weight and length of fish from pond were 750 g and 46 cm, while that of river fish were 620 g and 43 cm respectively. There was no significant differences of the haematological parameters between the two groups. However there was significant difference in the erythrocyte sedimentation rate between the two groups with higher value in the pond fish than the river fish. This could be attributed to stocking density, humidity, water temperature and oxygen content of the water. There was also significant difference in the leucocyte count between the two groups with the pond fish having higher sizes of heterophils, monocytes, eosinophils and basophil while higher size of lymphocyte in river fish.

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