Ecoutin Jean-Marc auteur aut IRD Richard E. auteur aut IRD Simier Monique auteur aut IRD Albaret Jean-Jacques auteur aut IRD text journalArticle eng text/pdf born digital access The fish assemblages of the Ebrie lagoon (Ivory Coast) were sampled by experimental fishing over the entire lagoon using a purse seine net. The sampling was conducted in the two main hydroclimatic seasons for this ecosystem, i.e. in the dry season (March-April) and in the wet season (August- September). The results obtained showed a fish assemblage organized around a consistently occurring group of twenty species. When analysed in terms of ecological categories, the seasonal influence led to a cycle in the assemblages from freshwater to marine around this permanent species pool, with a seasonal renewal of the assemblage. At the scale of the lagoon, there were variations in the composition of the assemblages that clearly distinguished the western part from the eastern one. The limit was situated at the Vridi canal, a wide artificial channel permanently connecting the lagoon to the sea. To the west, the assemblage was characterised by a strong spatial uniformity and low seasonal variability. To the east, the assemblage formed two different entities; one assemblage with pronounced freshwater affinities occurring in a side arm and the other assemblage with great seasonal variability under the alternating influence of seawater in the dry season and freshwater in the wet season. This part of the lagoon functioned somewhat like a typical estuary. (c) 2005 Elsevier Ltd. All rights reserved. specialized fish assemblages tropical lagoon spatio temporal pattern correspondence analysis West Africa 036 64 4 623-635 2005 0272-7714 https://www.documentation.ird.fr/hor/fdi:010041474 10.1016/j.ecss.2005.04.002 0272-7714 [F B010041474] https://www.documentation.ird.fr/hor/fdi:010041474 https://www.documentation.ird.fr/intranet/publi/depot/2015-10-22/010041474.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2006-03-29 2017-08-23 fdi:010041474 fre