1. Department of Zoology and Animal Physiology, Faculty of Science, University of Buea, Buea, Cameroon
2. Department of Animal Biology and Physiology, Faculty of Science, University of Yaounde I, Yaounde, Cameroon
3. Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon
4. Department of Biological Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
5. Department of Biological Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon