1. Department of Aquaculture and Fisheries, University of Ilorin, Ilorin, Nigeria
2. Department of Veterinary Pathology, University of Ibadan, Ibadan, Nigeria
3. Department of Fish Biology and Ecology, Central Laboratory for Aquaculture Research, Agriculture Research Center, Sharqia, Egypt
4. Department of Aquaculture and Fisheries Management, University of Ibadan, Ibadan, Nigeria