| Summary: | The Ecology of Polynemids: Poydactylus quadrifilis (Cuvier, 1829), Galeoides decadactylus (Bloch, 1795) and Pentanemus quinquarius (Linné, 1758) of the Artisanal Marine Fisheries of Grand Lahou (Ivory Coast). The ecology of Polynemids (Poydactylus quadrifilis, Galeoides decadactylus and Pentanemus quinquarius has been studied starting from the unloads of the artisanal marine fisheries of Grand Lahou (Ivory Coast). The temperature of the littoral is high during June and May with an average of 27,55±0,8 °C such as between November and December (29,30±0,1 °C). It is low between July and September (24,5±1,5 °C). On the other hand, salinity has its higher average values (35±0,8 g/l) during the cold periods (July at September) and lowest during the hot period, from October to January (33,9±0,3 g/l). The physiological needs of Polynemids cause seasonal migrations of the juveniles and adults. Hence the crossing of the estuary of the lagoon during the cold period, from June to August by the juveniles of Polydactylus quadrifilis and Galeoides decadactylus. For Polydactylus quadrifilis the annual recruitment of young specimens is identical to that of the adults, which is contrary to that of Galeoides decadactylus and Pentanemus quinquarius.
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