Species richness and conservation of Namibian freshwater macro-invertebrates, fish and amphibians

amphibians amphibien amphipoda anfibios animal aquatique anostraca anura aquatic animals aquatic insects biodiversidad biodiversity coleoptera conservation de la nature cours d'eau crustacea cursos de agua diptera endemism fishes freshwater fishes frogs grenouille insecte aquatique invertebrados invertebrates nature conservation ostracoda peces peces de agua dulce poisson (animal) poisson d'eau douce rana rivers species richness terre humide wetlands