XXXXXXXXX 12
Turnover Rate
Figure 5. Kafue floodplain production of: 1, T. rendalli; 2, S. macrochir and 3. S. ander-
sonii. Total production (- ), Biomass (XXXXX), Available production(- - -), Yield
(available) (0 l o), Yield (production) (AAAfi): see Table 2 and text (data from Kapet-
sky 1974).
The Kafue eastern floodplain (38,880 ha) is part of the 6,000 km2
Kafue floodplain lying at 15" 30'5, 900 m, which produces an annual crop of
5,000 t of fish, over half of the catch (59%) being three tilapia species: S.
andersonii, S. macrochir and T. rendalli. The building of the Kafue Gorge
hydroelectric dam, closed in 1971, stimulated pre- and post-impoundment
studies. Here fish biomasses were determined by chemofishing 25 sample
areas (Lagler et al. 1971; Kapetsky 1974). First estimates ranged from
64 kg/ha in grass marsh, 337 kg/ha in open lagoons, 337 kg/ha in river