Crosa G. auteur aut IRD Yameogo L. auteur aut IRD D. Calamari auteur aut IRD Hougard Jean-Marc auteur aut IRD text journalArticle eng text/pdf reformatted digital access In West Africa different insecticides had been applied in selected river areas for the reduction of the blackfly populations vectors of Onchocerca volvulus, a parasite casuing blindness. To evaluate the possible long term effects of the larvicides on the non target fauna an aquatic monitoring programme has been up from the initial phase of the project. Addressing the attention to the invertebrates data collected in four countries during a maximum period ranging from 1977 to 1996, this paper shows and discusses the data analysis strategy for the measure and interpretation of the biological variation. In particular the application of quantitative ecological analysis methods : Principal Component Analysis, rank abundance models and the community diversity indexes, is critically discussed and comments are given to the ecological interpretation of the results. (Résumé d'auteur) specialized ONCHOCERCOSE VECTEUR INSECTICIDE IMPACT SUR L'ENVIRONNEMENT FAUNE NON CIBLE INVERTEBRE AQUATIQUE COURS D'EAU METHODE D'ANALYSE TAXONOMIE DIVERSITE SPECIFIQUE ABONDANCE ANALYSE EN COMPOSANTES PRINCIPALES MODELISATION ETUDE REGIONALE ETUDE COMPARATIVE LARVICIDE TEMEPHOS CHLORPHOXIM PERMETHRINE CARBOSULFAN PYRACLOFOS VECTRON VARIATION BIOLOGIQUE AFRIQUE DE L'OUEST COTE D'IVOIRE GHANA GUINEE SIERRA LEONE 052LUTIN 036EAUCON02 37 14-15 2847-2858 1998 0045-6535 https://www.documentation.ird.fr/hor/fdi:010022764 10.1016/S0045-6535(98)00327-0 0045-6535 [F B010022764] https://www.documentation.ird.fr/hor/fdi:010022764 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_57-58/010022764.pdf IRD - Base Horizon / Pleins textes 2000-08-21 2021-05-20 fdi:010022764 fre