The data required to use the classic fish yield models are frequently unavailable in developing freshwater fisheries, but a number of simple empirical models, which use physical, chemical or biological parameters, may be used. Some of these models were analysed for their ability to predict fish standing stock and yield. Hartbeespoort Dam, near Pretoria, was used as an example. Development of a
... [Show full abstract] fish yield model using P concentration, mean depth and mean annual water temperature is recommended. -from Authors