Lake Kariba
In Lake Kariba the most important predator on the Lake Tanganyika sardine is "Hydrocynus vittatus", and the population in Lake Kariba increased following the introduction of the sardines. The diet of "H. vittatus" changed and as much as 70% of the food eaten by "H. vittatus" consisted of sardines by 1971. "H. vittatus" predation appears to be most intense at dawn and dusk when they were seen feeding on sardines at the surface at these times.