1. Laboratory of Zoology, Faculty of Science , 201336 University of Yaoundé 1 , Yaoundé , Cameroon
2. African Parks , Zakouma National Park , Deleima , Chad
3. Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ), ProFEC , Yaoundé , Cameroon
4. World Wide Fund for Nature Germany , Reinhardstrasse. 18, 10117 Berlin , Germany
5. Wildlife Conservation Research Unit , 6396 University of Oxford , Tubney House OX13 5QL , Tubney , UK
6. Biodiversité Environnement et Développement Durable (BEDD) , Garoua , Cameroon
7. Council of Yoko , Yoko , Cameroon
8. Department of Biological Sciences, Laboratory of Zoology, Higher Teacher Training College , University of Yaoundé 1 , Yaoundé , Cameroon