Kantoussan Justin auteur aut IRD Ecoutin Jean-Marc auteur aut IRD Fontenelle G. auteur aut IRD Thiaw O. T. auteur aut IRD Tito de Morais Luis auteur aut IRD Laë Raymond auteur aut IRD text journalArticle eng text/pdf born digital access Fish communities living within the artificial reservoirs of Manantali and Selingue in Mali are compared after the monitoring of small-scale fishery landings over 13 months (May 2002-June 2003). The fishing pressure constitutes the main difference of these two similar reservoirs. The effects of fishing on the structure of the fish communities are analyzed by using fish size spectra and derived indicators. In Selingue Reservoir, the fishing gears mostly target smaller species (mean length of 165 mm) than in Manantali Reservoir (mean length of 210 mm). Unlike in Selingue, the size structure does not change between seasons in Manantali. In Selingue, fishing practices that target the fish recruitment of the year constitute a structuring factor of the fish sizes observed in the catches. In spite of similar values of the slopes of the global fish communities' size spectra between the two reservoirs, they clearly display an intense exploitation at Selingue. Then, size-based spectra indicators represent a potential tool for assessing the impact of fishing on fish communities in small-scale fisheries. specialized Fish length Size-based indicators Fish community Small-scale fisheries African reservoirs 040 43 4 1167-1178 2009 1386-2588 https://www.documentation.ird.fr/hor/fdi:010048449 10.1007/s10452-009-9236-9 1386-2588 [F B010048449] https://www.documentation.ird.fr/hor/fdi:010048449 https://www.documentation.ird.fr/intranet/publi/2010/01/010048449.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2010-02-08 2017-08-23 fdi:010048449 fre