I stumbled on a fairly recent (2006) summary of aquaculture in Africa which at first sight suggests an incredibly impressive expansion in the use of aquatic agrobiodiversity — something like a five-fold increase in tonnage in the past ten years or so. ((via Timbuktu Chronicles.)) A closer look, however, shows that most of that increase has occurred in a single country: Egypt accounted for 83% of African aquaculture production in 2004, and 42% of that was Nile tilapia. The industry does seem to be diversifying a bit in terms of species, but not much, judging by the graphs. I hope there isn’t a bust coming after this boom…