The decrease in fishery productivity in Lake Tanganyika since the 1950s is a consequence of global warming rather than just overfishing, according to a new report from an international team led by a University of Arizona geoscientist.

The lake was becoming warmer at the same time in the 1800s the abundance of fish began declining, the team found. The lake's algae -- fish food -- also started decreasing at that time.

However, large-scale commercial fishing did not begin on Lake Tanganyika until the 1950s.

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