Effect of ecotype on Heamtology of Clarias Gariepinus (Burchell 1822)

  • AO Agbon
  • IT Omoniyi
  • AA Akinyemi
  • WO Abdul
  • FI Adeosun
  • DO Odulate

Abstract

A study on the possible effect of ecotype on the haematological physiology of the African mud catfish, Clarias gariepinus (Burchell, 1822), was investigated by randomly sampling C. gariepinus from three different ecotypes: wild (Oyan lake reservoir), semi-intensive culture system (earthen pond) and from intensive culture system (fibre-glass rearing tanks). Blood samples from 15 fish were obtained from each of the ecotype and subjected to haematological analyses using standard methods. The following haematological parameters were investigated and found to be significantly different (p<0.05) in the catfish from the different ecotypes: red blood cell count (RBC), packed cell volume (PCV), haemoglobin concentration (Hb), white blood cell count (WBC), lymphocytes, erythrocytes sedimentation rate (ESR), neutrophils and monocytes. However, only the mean corpuscular volume (MCV) of the haematological indices was significantly (p<0.05) affected. Analysis of variance (ANOVA) of the physico-chemical parameters of the culture water from the three different ecotypes also revealed that dissolved oxygen (DO), total dissolved solids (TDS) alkalinity and conductivity were significantly different (p<0.05). Results from this study suggest that the ecotype from where C. gariepinus is sourced can influence the haematological parameters and hence the need to reckon with them when reporting haematological parameters of this fish species.

Keywords: Ecotype, blood parameters, Clarias gariepinus, wild, culture

Journal of Aquatic Sciences 28 (1): 83-92 (2013)

Author Biographies

AO Agbon
Department of Zoology, Federal University, Lafia, P.M.B. 146, Lafia, Nasarawa State, Nigeria
IT Omoniyi
Department of Aquaculture and Fisheries Management, University of Agriculture, P.M.B. 2240, Abeokuta, Ogun State, Nigeria
AA Akinyemi
Department of Aquaculture and Fisheries Management, University of Agriculture, P.M.B. 2240, Abeokuta, Ogun State, Nigeria
WO Abdul

Department of Aquaculture and Fisheries Management, University of Agriculture, P.M.B. 2240, Abeokuta, Ogun State, Nigeria

FI Adeosun
Department of Aquaculture and Fisheries Management, University of Agriculture, P.M.B. 2240, Abeokuta, Ogun State, Nigeria
DO Odulate
Department of Aquaculture and Fisheries Management, University of Agriculture, P.M.B. 2240, Abeokuta, Ogun State, Nigeria
Published
2013-07-02
Section
Articles

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eISSN: 0189-8779