Abstract
Abstract Estimates of potential fish yield derived for the Lake Bangweulu system by three independent methods varied from 10 to 35 kg/hectare. An estimate of 20 kg/hectare predicted by the regression of yield on morphoedaphic index (MEI) for 31 African lakes is in good agreement with the 1973–1974 estimated yield of 19 kg/hectare. Potential yield was 35 kg/hectare in the morphoedaphic model for 17 intensively exploited African lakes. Potential yield based on primary production covariates was 16 kg/hectare. Standing crop estimates indicated possible yields of 10 to 17 kg/hectare based on 100% and 60% sampling recovery, respectively, of fish from chemical treatment samples and a 50% annual exploitation rate.
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