| Table 9. Recommended daily ration for North African catfish Clarias gariepinus. Ration expressed as percent of body weight per day | ||||||
| Temp | Fish size (g) | |||||
| oC | 1�10 | 10�25 | 25�50 | 50�100 | 100�300 | 300�800 |
| 16 | 1 | 0.6 | 0.4 | 0.3 | 0.2 | 0.2 |
| 18 | 3 | 1.6 | 1 | 0.8 | 0.6 | 0.5 |
| 20 | 5 | 3 | 2 | 1.5 | 1.2 | 1 |
| 22 | 6.8 | 4.5 | 3 | 2.4 | 2 | 1.7 |
| 24 | 8.1 | 6 | 4 | 3 | 2.5 | 2.2 |
| 26 | 9.5 | 6.6 | 5.1 | 3.6 | 3.2 | 2.8 |
| 28 | 10 | 7 | 5.5 | 4 | 3.5 | 3.1 |
| 30 | 9.8 | 6.8 | 5.3 | 3.7 | 3.2 | 2.9 |
| 32 | 9.5 | 6.5 | 5 | 3.5 | 3 | 2.8 |
| Source: Hogendoorn et al. (1983); Hecht, Uys and Britz (1988) | ||||||