1. Economics and Rural Development, Gembloux Agro-Bio Tech—University of Liège , 5030 Gembloux , Belgium
2. Agricultural and Forestry Research Institute (IRAF), National Center for Scientific and Technological Research (CENAREST) , Libreville , Gabon
3. UMR EGCE (Evolution, Genomes, Comportement, Ecologie), CNRS IRD—Paris-Sud University , 91190 Gif-sur-Yvette , France
4. Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech—University of Liège , 5030 Gembloux , Belgium