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Des peuplements zooplanctoniques ont ete etudies le long de deux petits bassins cotiers ivoiriens. Ce sont la riviere Bia, sur laquelle ont ete construits les barrages hydroelectriques d\'Ayame I et II, et la riviere Agnebi depourvue de barrage sur son cours principal. Le long de la riviere Bia, d\'importantes variations de la richesse specifique et des densites zooplanctoniques moyennes ont ete observees. Le zooplancton a ete plus diversifie (n = 56) et plus abondant (116675 individus/m3) dans le lac qu\'en amont (n = 22 ; 3580 individus/m3) et en aval (n = 16 ; 9180 individus/m3). En revanche, les fluctuations du nombre d\'especes et des densites moyennes du zooplancton entre les cours superieur (n = 11 ; 5580 individus/m3), moyen (n = 22; 11920 individus/m3) et inferieur (n = 22 ; 12280 individus/m3) ont ete moins marquees le long de la riviere Agnebi. L\'analyse du du zooplancton et des caracteristiques physiques du milieu (RDA, CANOCO) a permis de montrer que la densite du phytoplancton, la transparence et la vitesse du courant sont lesfacteurs les plus determinants dans la distribution du zooplancton le long des bassins etudies. zooplankton distribution was assessed along two Ivorian coastal basins : the river Bia on which two hydroelectric dams (Ayame I and Ayame II)have been built and the Agnebi river free of dam. There were significant differences in zooplanktonic compositions and abundance across the Bia river basin sampling sites . Zooplankton was more diversified (n = 56) and abundant (116675 individuals/m3) in Ayame I than in upper (n = 22 ; 3580 individuals/m3) and lower course (n = 16 ; 9180 individuals/m3). Adversely, variationsof zooplankton composition and abundance between the upstream (n = 11 ; 5580 individuals/m3), the middle stream (n = 22 ; 11920 individuals/m3) and the lower stream (n = 22 ; 12280 individuals/m3) of the River Agnebi were less noticeable. Combined analysis (RDA, CANOCO) of zooplankton abundance and environmental characteristics showed that phytoplankton, water transparency and water current were the environmentalvariables that most affect zooplankton distribution along these two coastal rivers. Keywords : Zooplancton, distribution, rivieres Bia et Agnebi, Cote d\'Ivoire Agronomie Africaine Vol. 19 (2) 2007: pp. 197-210

Distribution Du Zooplancton Le Long De Deux Petits Bassins Côtiers Ouest Africains (Bia Et Agnebi ; Côte D\'Ivoire)