A description is given of the fish remains from six settlement mounds located along the Senegal River that cover an occupation of approximately 1800 years. The 22 fish taxa found at the sites are described and attention is focussed on their spatial and, especially, temporal distribution. The place and season of capture are established and the possible fishing techniques are reconstructed. Using diachronic trends seen in the size distribution of the fish, it is argued that the ichthyofauna of the Middle Senegal Valley already shows effects of overfishing during the course of the first millennium AD.
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