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The abundance of two main pelagic fish species in Lake Tanganyika (Stolothrissa tanganicae and Lates stappersii) has always been observed to fluctuate considerably at different time scales. The inverse correlation between the abundance of these species has often been interpreted as the consequence of predator-prey relations (avoidance behaviour by the prey). However, currently the two species often appear spatially segregated in the lake, S. tanganicae dominating in the north while L. sappesii is generally abudant in the south wehre it feeds mostly on shrimps. A fluctuating abundance of the species is nevertheless observed. As these fish species ahve a major importance for the fisheries, we investigated the limnological variability in relation to the short-term variability of fish catches. (cont.)

BR Staff Publications [a] (paper in international, peer reviewed journal) --- lake Tanganyika --- limnology --- biodiversity --- fisheries