1. Department of Biological Science, Faculty of Science; University of Ngaoundéré; Ngaoundéré Cameroon
2. Animal Physiology Laboratory, Faculty of Science; University of Yaoundé I; Yaoundé Cameroon
3. Department of Zoology and Animal Physiology, Faculty of Science; University of Buéa; Buea Cameroon
4. Endocrinology and Radioisotopes Laboratory; Institute of Medical Research and Medicinal Plants Studies (IMPM); Yaoundé Cameroon