Reunion de Travail sur la Limnologie Africaine; (comptes rendus), Nairobi, 16-23 dec 1979. (v. 9): Hydrobiological evaluation of side effects of larvicide treatments against Simulium damnosum in West Africa.- (v. 10): The hydrochemical regulation of the Lake Chad

aquatic plants benthos bentos biomasa biomass biomasse cours d'eau crecimiento croissance cursos de agua encuestas fishery biology fishery resources fishes fitoplancton freshwater fishes growth hidrobiologia hydrobiologie hydrobiology lac lac tchad lago chad lagos lake chad lakes limnologia limnologie limnology peces peces de agua dulce performance de reproduction phytoplancton phytoplankton plante aquatique poisson (animal) poisson d'eau douce recursos pesqueros reproductive performance reproductividad ressource halieutique rivers surveys zooplancton zooplankton